201025411 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種放射紫外光的螢光燈。 【先前技術】 近年來，在光觸媒或廣義的樹脂硬化、除菌、美容、 醫療等用途中已利用波長300nm附近的紫外光。在該用途 的光源，係使用具有在波長250〜380nm之間具有峰値之 螢光體的紫外線放射型的螢光燈。該螢光燈係藉由放電而 生成短波長（例如200nm以下）的光，由該短波長的光發 生預定波長領域的紫外光。 在螢光燈之發光管，一般而言係使用鈉玻璃、硼矽酸 玻璃、鋁矽酸玻璃等所謂的硬質玻璃。但是，硬質玻璃會 吸收波長250〜3 80nm的紫外光，因此來自燈的放射光率 會降低。 因此，使用石英玻璃而非硬質玻璃作爲發光管的螢光 燈已在例如專利文獻1、2等中被提出。如上所示，若在 發光管使用石英玻璃，則紫外光透過率高，且可有效率地 取出光。 但是，在螢光燈之製造工程中，使構成發光管的材料 升溫至軟化點附近，在該狀態下使螢光體附著。但是，石 英玻璃的軟化點溫度爲1 600 °C附近的高溫，因此若使石英 玻璃加熱至如上所示之高溫時，螢光體本身會劣化。 另一方面’亦考慮進行螢光體不會劣化的溫度，例如 -5- 201025411 9〇〇C以下的加熱，但是此時石英玻璃與螢光體的附著會 變弱’而會產生螢光體在燈亮燈中剝落等問題。 (專利文獻1)日本特表2008-503046號公報 (專利文獻2)日本特表2007-534128號公報 【發明內容】 (發明所欲解決之課題） 本發明所欲解決的課題在提供一種在發光管使用石英 玻璃的螢光燈’且紫外線放射特性高者。 (解決課題之手段） 爲了解決上述課題，本發明係一種螢光燈，係具有石 英玻璃製發光管的紫外線放射型螢光燈，其特徵爲具有： 在前述發光管之光照射方向的背面側形成在放電空間側表 面之由軟化點比石英玻璃爲更低的物質所構成的玻璃層； 形成在該玻璃層之放電空間側之表面的螢光體層；及形成 在玻璃層與發光管之間的紫外線反射體。此外，反射體係 由含有氧化矽粒子與氧化鋁粒子的膜所構成爲其特徵。此 外，玻璃層係包含硼矽酸玻璃粉末或鋁矽酸玻璃粉末之任 一者爲其特徵。 (發明之效果） 藉由上述構成，由於在石英玻璃製發光管與螢光體層 之間形成由軟化點比石英玻璃的軟化點爲更低的材料所構 -6 - 201025411 成的玻璃層，藉由上升至玻璃層的粒子表面呈軟化的溫度 ，即可使螢光體附著在玻璃層。此外，玻璃層與石英玻璃 亦玻璃層的粒子表面呈軟化，藉此可與石英玻璃表面局部 性熔接而藉此予以固接。此外，紫外線反射體與玻璃層之 間係由於玻璃層的粒子表面呈軟化，可將紫外線反射體表 面的氧化矽或氧化鋁粒子與玻璃層之間加以固接。針對紫 外線反射體，藉由氧化矽溶膠的燒成，在粒子表面形成氧 化矽玻璃層，來進行與石英玻璃的固接。藉由以上構成， 由於在玻璃層與發光管之間具有紫外線反射體，因此可使 在螢光體所發生的紫外線在特定方向反射而獲得高放射效 率。 【實施方式】201025411 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to a fluorescent lamp that emits ultraviolet light. [Prior Art] In recent years, ultraviolet light having a wavelength of around 300 nm has been utilized in photocatalyst or generalized resin hardening, sterilization, beauty, medical, and the like. For the light source used for this purpose, an ultraviolet radiation type fluorescent lamp having a phosphor having a peak at a wavelength of 250 to 380 nm is used. The fluorescent lamp generates light of a short wavelength (e.g., 200 nm or less) by discharge, and ultraviolet light of a predetermined wavelength range is generated by the short-wavelength light. In the arc tube of a fluorescent lamp, so-called hard glass such as soda glass, borosilicate glass or aluminosilicate glass is generally used. However, hard glass absorbs ultraviolet light having a wavelength of 250 to 3 80 nm, so the radiation rate from the lamp is lowered. Therefore, a fluorescent lamp using quartz glass instead of hard glass as an arc tube has been proposed in, for example, Patent Documents 1, 2 and the like. As described above, when quartz glass is used for the arc tube, the ultraviolet light transmittance is high, and light can be efficiently taken out. However, in the manufacturing process of the fluorescent lamp, the material constituting the arc tube is heated to the vicinity of the softening point, and the phosphor is adhered in this state. However, the softening point temperature of the quartz glass is a high temperature around 1 600 °C, so if the quartz glass is heated to a high temperature as shown above, the phosphor itself deteriorates. On the other hand, 'the temperature at which the phosphor does not deteriorate, such as -5 - 201025411, 9 〇〇C or less, is also considered, but at this time, the adhesion of the quartz glass to the phosphor is weakened, and a phosphor is generated. Peel off the lamp and other issues. (Patent Document 1) Japanese Patent Publication No. 2008-503046 (Patent Document 2) JP-A-2007-534128 SUMMARY OF INVENTION [Problem to be Solved by the Invention] The problem to be solved by the present invention is to provide a kind of illumination The tube uses a quartz glass fluorescent lamp' and has high ultraviolet radiation characteristics. In order to solve the problem, the present invention relates to a fluorescent lamp, which is an ultraviolet radiation type fluorescent lamp having an arc tube made of quartz glass, and has a feature of: a back side of a light irradiation direction of the arc tube; a glass layer formed of a substance having a softening point lower than that of quartz glass on a side surface of the discharge space; a phosphor layer formed on a surface of the discharge space side of the glass layer; and formed between the glass layer and the light-emitting tube UV reflector. Further, the reflection system is characterized by a film containing cerium oxide particles and alumina particles. Further, the glass layer is characterized in that it contains either a borosilicate glass powder or an aluminosilicate glass powder. (Effect of the Invention) According to the above configuration, a glass layer composed of a material having a softening point lower than a softening point of quartz glass is formed between the quartz glass light-emitting tube and the phosphor layer, and the glass layer is formed by -6 - 201025411. The phosphor is attached to the glass layer by a temperature at which the surface of the particles rising to the glass layer is softened. Further, the surface of the glass layer and the quartz glass and the glass layer are softened, whereby the surface of the quartz glass can be locally welded to thereby be fixed. Further, the surface between the ultraviolet reflector and the glass layer is softened by the surface of the particles of the glass layer, and the ruthenium oxide or alumina particles on the surface of the ultraviolet reflector can be fixed to the glass layer. With respect to the ultraviolet ray reflector, the cerium oxide glass layer is formed on the surface of the particles by firing of the cerium oxide sol, and the glass glass is fixed to the quartz glass. According to the above configuration, since the ultraviolet ray reflector is provided between the glass layer and the arc tube, the ultraviolet ray generated in the phosphor can be reflected in a specific direction to obtain high radiation efficiency. [Embodiment]
第1圖係顯示本發明之螢光燈（以下亦僅稱之爲「燈 」），（a)係顯示長邊方向的剖面圖，（b)係顯示（a)的A-A 剖面圖。 螢光燈係由發光管（玻璃管）1所構成，在發光管1 的外壁，以在發光管1的長邊方向爲相同地作延伸的方式 配設有一對帶狀電極2(2a、2b)。在電極2(2a、2b) 係被覆有保護膜3。在發光管1的內部係封入有ΙΟΟΤογγ 之用以藉由介電質阻障放電來生成準分子的氣體，例如氙 氣，在各電極連接有省略圖示的交流電源，若供給有交流 電力時，則使作爲構成發光管1之材料的石英玻璃介在其 中而在發光管1的內部發生介電質阻障放電。 -7- 201025411 在發光管1的內壁係在剖面方向約半周形成有紫外線 反射體4。該紫外線反射體4係以跨及相當於一方電極2a 的位置與相當於另一方電極2b的位置的方式所形成。此 外，在發光管1的內壁及紫外線反射體4的內面形成有玻 璃層5，此外，在其內面以圓周方向之大致相同厚度形成 有螢光體層6。玻璃層5與螢光體層6係形成在發光管1 的內周面全域，因此紫外線反射體4係構成爲被夾在玻璃 管1與螢光體層6。未形成有紫外線反射體4的領域係成 爲光取出領域。在發光管1的內部，在一端係被塗佈有例 如糊膏狀的始動輔助用導電性構件7。 藉由介電質阻障放電（dielectric barrier discharge) 所發生的紫外線，例如波長1 72nm的光係藉由刺激螢光體 層6而被轉換成波長250〜38 Οηιη的紫外光而予以放射。 該紫外光係直接或在紫外線反射體4反射而被放射至燈外 部。 紫外線反射體4係由氧化矽粒子（Si02 )及除此以外 的粒子，例如氧化鋁粒子（ai2o3 )所構成。氧化矽粒子 由於亦會有與構成放電容器的材料相同的物質，因此在接 著性（接著強度）方面極爲有用。此外，氧化鋁粒子係基 於反射紫外線的能力比氧化矽粒子爲高而被加以利用。因 此，假設使反射體4僅由氧化矽粒子（Si02 )構成時，以 紫外線反射機能方面來看，相對於由氧化矽粒子（Si 02 ) 與氧化鋁粒子（ai2o3 )所構成的反射膜會較爲劣等，此 外，假設使反射體4僅由氧化鋁粒子（Al2〇3 )構成時， 201025411 與發光管1的接著性會降低，很可能會有氧化鋁粒子剝離 的問題。氧化矽粒子以外的粒子並非限定爲氧化鋁粒子， 若爲紫外線的反射能力高於氧化矽粒子的粒子，即可取而 代之。例如可使用氟化鎂、氟化鈣、氟化鋰、氟化鈉、氟 化鋇、氟化鑭、氟化鈽、氧化鈽、氧化釔、氧化鎂、氧化 鈣等粒子。此外，只要同時具有不會使對於放電容器的接 - 著性與真空紫外光的反射特性降低的機能，則除了氧化矽 粒子與氧化鋁粒子以外，亦可使上述粒子混在一起。以放 電容器的接著性的觀點來看，氧化矽粒子（Si02 )與其他 粒子的混合比率係以將氧化矽粒子設爲3 0重量％以上爲佳 ’此外，以其他粒子而言，若使用氧化鋁粒子時，亦考慮 到真空紫外光之反射機能的觀點，氧化矽粒子的比率係以 50〜100重量％未滿的範圍爲佳。 玻璃層5係使用具有軟化點比作爲發光管1之基材的 石英玻璃的軟化點（ 1600 °C)爲更低的玻璃。尤其較佳爲 φ 軟化點在螢光體之燒成溫度（400〜900 °C)範圍內的玻璃 ，且耐熱衝擊性佳的硬質玻璃。其中亦以硼矽酸玻璃（Si_ B-0系玻璃、軟化點：約800°C)、鋁矽酸玻璃（si-Al-0 系玻璃、軟化點：約900°C)較爲適合。 螢光體6係使用例如銪賦活硼酸緦（Sr-B-0 : Eu (以 下稱爲SBE)、中心波長368 nm)螢光體、铈賦活鋁酸鎂 鑭（La-Mg-Al-O: Ce (以下稱之爲LAM)、中心波長 338nm (但爲broad))螢光體、釓、鐯賦活磷酸鑭（La_ P-0: Gd、Pr (以下稱爲 LAP: Pr、Gd，中心波長 311nm 201025411 )螢光體等。該等螢光體係吸收均爲未達波長250 nm之領 域的紫外光，且轉換成分別所具有的中心波長區域的紫外 線。 電極係由例如銀或金、銘帶（aluminum tape )等所構 成。其中，亦可爲直線狀電極，而非限定於帶狀電極。 本發明之螢光燈係在石英玻璃製發光管1與螢光體層 6之間形成有由軟化點比石英玻璃的軟化點爲更低的材料 所構成的玻璃層5。因此，可藉由以玻璃層5的軟化溫度 使其加熱，而使螢光體（螢光體層6的構成材料）附著在 玻璃層5。此外，玻璃層5與石英玻璃1的固接亦可以玻 璃層5的軟化溫度來進行。此外，由於在玻璃層5與發光 管1之間具有紫外線反射體4，因此可藉由使紫外線在特 定方向反射而獲得高放射效率。 第2圖係顯示第1圖（b)所示之螢光燈之剖面構造的變 形例。具體而言’第1圖（b)所示之螢光燈係螢光體層6的 厚度在圓周方向爲大致相同’相對於此，第2圖（a)所示之 螢光燈係螢光體層的厚度在圓周方向產生變化。更具體而 言’螢光體層6中，存在有紫外線反射體4的領域係變厚 ’未存在有紫外線反射體4的領域（亦即光取出領域）係 變薄。 該構造的優點係藉由使光取出領域的螢光體層6變薄 ’可fe升在紫外線反射體4所反射的紫外線的透過率，同 時可在螢光體層6施加已將藉由介電質阻障放電所發生的 紫外線轉換成波長250〜380nm的紫外光，而可提升合計 201025411 的紫外線強度。 此外’第2圖（b)所示之螢光燈中，螢光體層係僅存在 方令具:有·紫外線反射體4的領域，並不存在於未具有紫外線 反射體4的領域，亦即光取出領域。 該構造的優點在於：藉由使光取出領域的螢光體層6 '消失’可提升在紫外線反射體4所反射的紫外線的透過率 ’相較於第2圖（a)的情形，製作較爲容易。 胃3圖亦顯示第1圖所示之螢光燈之剖面構造的變形 例！ °具體而言，第1圖所示之螢光燈係發光管的剖面形狀 爲圓形’相對於此，第3圖所示之螢光燈係發光管的剖面 形狀爲矩形狀。因此，第3圖所示之實施形態，成爲整體 而S爲扁平形狀的發光管。 在發光管1之其中一方外表面設有一方電極2a，在另 一方外表面設有另一方電極2b。各電極係形成爲網目狀， 以使光透過。 在該螢光燈中，亦在發光管1的內壁形成有紫外線反 射體4，在其內面形成有玻璃層5及螢光體層6。在第1 圖中所說明的始動輔助導電性構件係予以省略。 第4圖所示之螢光燈係2個電極均存在於發光管1之 中的類型。與第1圖所示之螢光燈相同地，在發光管1的 內面依序形成有紫外線反射體4、玻璃層5、螢光體層6。 發光管1係由石英玻璃所構成，在單部安裝有密封板11’ 貫穿密封板11而安裝有燈絲型電極2。通常，在發光管進 行被封入有作爲緩衝氣體之以Ar爲主成分的稀有氣體、 -11 - 201025411 及水銀的低壓水銀放電的燈。 接著說明第1圖所示之螢光燈之製造方法。第4圖# 顯示第1圖所示之螢光燈之製造步驟的流程圖。 步驟1係形成紫外線反射體的工程。 由氧化矽粒子與含有氧化鋁粒子的溶膠凝膠液製丨乍懸 濁液，藉由在發光管用材料的內表面流動該溶液，可製作 紫外線反射體。紫外線反射體的厚度係可藉由控制所流下 的次數或懸濁液流動速度來進行控制。在形成紫外線反射 體之後，進行500〜1000°C下的大氣中燒成，而使紫外線 ·© 反射體固接。 步驟2係生成玻璃層的工程。 首先’將塊狀玻璃微細粉碎而施加於球磨機。經粉碎 後的玻璃粉末係藉由篩網來將粒徑作分類，抽出例如平均 粒徑爲0.5〜1〇μιη(最好爲1〜5μιη)的玻璃粉末。將該玻 璃粉末與例如硝化纖維素（nitrocellulose)、乙酸丁醋液 以重量比1 : 4〜1 : 1 0的比例加以混合，將該混合液連同 〇 氧化鋁球藉由球磨機充分硏磨而生成漿體（slurry )。以 下將使該玻璃粉末分散的漿體稱爲「玻璃漿體」。接著， 將該玻璃漿體塗佈在發光管用材料的內表面。發光管用材 料係在一方端部形成有2個排氣管的管。將其垂直保持， 在已充滿前述玻璃漿體的容器液面，放入其中一方排氣管 來抽吸漿體。所被抽吸的玻璃漿體係被塡充在發光管用材 料的內部，但是可藉由由另一方排氣管中抽出而塗佈在內 表面。其中，藉由調整玻璃漿體的黏度或塗佈次數，可調 -12- 201025411 整最終獲得的玻璃層的厚度。玻璃漿體的厚度係以形成在 1〜30μ„ι的範圍爲佳。其中，爲了針對預定的紫外光而獲 得高透過率，玻璃層的厚度係以在可保持後工程中所形成 的螢光體層的範圍內儘可能爲小者爲佳。此係基於將在玻 璃層的紫外線吸收止於最小限度之故。 接著，使玻璃漿體乾燥。 ^ 使用被安裝在發光管用材料的2個排氣管而使乾燥氮 氣作循環，藉此使玻璃漿體所含有的乙酸丁酯蒸發。結果 〇 ，在發光管用材料的內表面形成堆積有厚度爲1〜30μπι的 玻璃粉末的層（玻璃層）。其中，用在乾燥的氣體亦可爲 乾燥空氣。接著，使玻璃層燒成。具體而言，藉由將玻璃 管加熱而使玻璃粉末燒成，但是燒成條件爲在大氣中，約 5 00〜1 000 °C，以時間而言，以最高溫度下的保持時間予 以表示時’爲0.2〜1小時。上述使用硼矽酸玻璃粉末或 銘砂酸玻璃粉末時，以在600〜900 °C下進行爲佳。接著， φ 藉由如上所示之燒成工程而使粒子彼此相結合並且融著在 玻璃管’玻璃層會強力結著在基材。此外，玻璃層若爲粉 末狀態’亦具有作爲在營光體所發生之紫外線之反射層的 機能。其中’玻璃層由於不會升溫至熔融溫度，因此通常 係維持粉末狀的形態’但是亦可形成爲更加提高溫度而使 其熔融的狀態。 步驟3係將螢光體塗佈在發光管用材料之內面的工程 〇 螢光體的塗佈方法係與步驟2相同，將發光管形成材 -13- 201025411Fig. 1 is a view showing a fluorescent lamp of the present invention (hereinafter also referred to simply as "light"), (a) showing a cross-sectional view in the longitudinal direction, and (b) showing a cross-sectional view taken along line A-A of (a). The fluorescent lamp is composed of an arc tube (glass tube) 1, and a pair of strip electrodes 2 (2a, 2b) are disposed on the outer wall of the arc tube 1 so as to extend in the same direction in the longitudinal direction of the arc tube 1. ). The electrode 2 (2a, 2b) is covered with a protective film 3. In the interior of the arc tube 1, a gas for generating excimer by dielectric barrier discharge, such as helium gas, is sealed in the interior of the arc tube 1, and an alternating current power source (not shown) is connected to each electrode, and when alternating current power is supplied, Then, a dielectric barrier discharge is generated inside the arc tube 1 by interposing quartz glass as a material constituting the arc tube 1. -7- 201025411 The ultraviolet reflector 4 is formed on the inner wall of the arc tube 1 in about half a section in the cross-sectional direction. The ultraviolet reflector 4 is formed so as to span the position corresponding to the one electrode 2a and the position corresponding to the other electrode 2b. Further, a glass layer 5 is formed on the inner wall of the arc tube 1 and the inner surface of the ultraviolet ray reflector 4, and a phosphor layer 6 is formed on the inner surface thereof at substantially the same thickness in the circumferential direction. Since the glass layer 5 and the phosphor layer 6 are formed over the entire inner peripheral surface of the arc tube 1, the ultraviolet reflector 4 is configured to be sandwiched between the glass tube 1 and the phosphor layer 6. The field in which the ultraviolet reflector 4 is not formed is in the field of light extraction. In the inside of the arc tube 1, a start-up auxiliary conductive member 7 such as a paste is applied to one end. The ultraviolet light generated by the dielectric barrier discharge, for example, a light having a wavelength of 1 72 nm is converted into ultraviolet light having a wavelength of 250 to 38 ηηη by stimulating the phosphor layer 6, and is radiated. This ultraviolet light is directly or reflected by the ultraviolet reflector 4 and is radiated to the outside of the lamp. The ultraviolet ray reflector 4 is composed of cerium oxide particles (SiO 2 ) and other particles such as alumina particles (ai2o3). Since the cerium oxide particles are also the same as the material constituting the discharge vessel, they are extremely useful in terms of adhesion (adequate strength). Further, the alumina particles are utilized because they have a higher ability to reflect ultraviolet rays than cerium oxide particles. Therefore, it is assumed that when the reflector 4 is composed only of cerium oxide particles (SiO 2 ), it is comparable to the reflecting film composed of cerium oxide particles (Si 02 ) and alumina particles (ai2o3 ) in terms of ultraviolet light reflecting function. In addition, when the reflector 4 is composed only of alumina particles (Al2〇3), the adhesion of the 201025411 to the arc tube 1 is lowered, and there is a possibility that the alumina particles are peeled off. The particles other than the cerium oxide particles are not limited to the alumina particles, and if the ultraviolet ray has a higher reflectance than the particles of the cerium oxide particles, it may be replaced. For example, particles such as magnesium fluoride, calcium fluoride, lithium fluoride, sodium fluoride, cesium fluoride, cesium fluoride, cesium fluoride, strontium oxide, cerium oxide, magnesium oxide, calcium oxide or the like can be used. Further, as long as it has a function of not lowering the conductivity of the discharge vessel and the reflection characteristics of the vacuum ultraviolet light, the particles may be mixed in addition to the cerium oxide particles and the alumina particles. From the viewpoint of the adhesion of the discharge vessel, the mixing ratio of the cerium oxide particles (SiO 2 ) to the other particles is preferably such that the cerium oxide particles are 30% by weight or more, and in the case of other particles, oxidation is used. In the case of aluminum particles, in view of the reflection function of vacuum ultraviolet light, the ratio of cerium oxide particles is preferably in the range of 50 to 100% by weight. The glass layer 5 is made of glass having a softening point (1600 ° C) lower than the softening point of the quartz glass as the base material of the arc tube 1. In particular, it is preferably a glass having a softening point at a firing temperature of the phosphor (400 to 900 ° C) and a hard glass having excellent thermal shock resistance. Among them, borosilicate glass (Si_B-0-based glass, softening point: about 800 ° C), aluminosilicate glass (si-Al-0-based glass, softening point: about 900 ° C) are suitable. In the phosphor 6 system, for example, an anthracene active strontium borate (Sr-B-0: Eu (hereinafter referred to as SBE), a center wavelength of 368 nm) phosphor, an anthracene active magnesium aluminate strontium (La-Mg-Al-O: Ce (hereinafter referred to as LAM) and a central wavelength of 338 nm (but broad) phosphors, strontium, and strontium active strontium phosphate (La_P-0: Gd, Pr (hereinafter referred to as LAP: Pr, Gd, center wavelength 311 nm) 201025411 ) Fluorescent body, etc. These fluorescent systems absorb ultraviolet light in a field that is not at a wavelength of 250 nm and are converted into ultraviolet rays in a central wavelength region respectively. The electrode system is made of, for example, silver or gold, and a band (aluminum). It may be a linear electrode, and may not be limited to a strip electrode. The fluorescent lamp of the present invention is formed by a softening point ratio between the quartz glass light-emitting tube 1 and the phosphor layer 6. The softening point of the quartz glass is a glass layer 5 composed of a lower material. Therefore, the phosphor (the constituent material of the phosphor layer 6) can be attached to the glass by heating at the softening temperature of the glass layer 5. Layer 5. In addition, the fixing of the glass layer 5 and the quartz glass 1 can also be carried out by the softening temperature of the glass layer 5. Further, since the ultraviolet ray reflector 4 is provided between the glass layer 5 and the arc tube 1, high ultraviolet ray efficiency can be obtained by reflecting ultraviolet rays in a specific direction. Fig. 2 is a view showing Fig. 1(b). A modification of the cross-sectional structure of the fluorescent lamp. Specifically, the thickness of the fluorescent lamp-based phosphor layer 6 shown in FIG. 1(b) is substantially the same in the circumferential direction. FIG. 2(a) The thickness of the fluorescent lamp-based phosphor layer shown varies in the circumferential direction. More specifically, in the phosphor layer 6, the field in which the ultraviolet reflecting body 4 exists is thickened, and the field in which the ultraviolet reflecting body 4 is not present is present. (i.e., in the field of light extraction) is thinned. The advantage of this structure is that by thinning the phosphor layer 6 in the light extraction field, the transmittance of the ultraviolet light reflected by the ultraviolet reflector 4 can be increased, and at the same time, The ultraviolet layer 6 is applied to convert the ultraviolet light generated by the dielectric barrier discharge into ultraviolet light having a wavelength of 250 to 380 nm, thereby increasing the ultraviolet intensity of the total of 201025411. Further, the fluorescent light shown in FIG. 2(b) In the lamp, there is only a prescription for the phosphor layer. The field of the ultraviolet reflector 4 does not exist in the field without the ultraviolet reflector 4, that is, in the field of light extraction. This structure has an advantage in that the phosphor layer 6 'disappears' in the light extraction field can be eliminated. It is easier to make the transmittance of the ultraviolet light reflected by the ultraviolet reflector 4 as compared with the case of Fig. 2(a). The stomach 3 also shows the deformation of the cross-sectional structure of the fluorescent lamp shown in Fig. 1. Specifically, the cross-sectional shape of the fluorescent lamp-based arc tube shown in Fig. 1 is a circular shape. In contrast, the cross-sectional shape of the fluorescent lamp-based arc tube shown in Fig. 3 is a rectangular shape. Therefore, the embodiment shown in Fig. 3 is an overall light-emitting tube in which S is a flat shape. One electrode 2a is provided on one of the outer surfaces of the arc tube 1, and the other electrode 2b is provided on the other outer surface. Each electrode system is formed in a mesh shape to transmit light. In the fluorescent lamp, an ultraviolet ray reflector 4 is also formed on the inner wall of the arc tube 1, and a glass layer 5 and a phosphor layer 6 are formed on the inner surface thereof. The starting auxiliary conductive member described in Fig. 1 is omitted. The fluorescent lamp shown in Fig. 4 is of a type in which two electrodes are present in the arc tube 1. Similarly to the fluorescent lamp shown in Fig. 1, an ultraviolet reflector 4, a glass layer 5, and a phosphor layer 6 are sequentially formed on the inner surface of the arc tube 1. The arc tube 1 is made of quartz glass, and a sealing plate 11' is attached to the single portion, and the filament electrode 2 is attached to the sealing plate 11. Usually, a lamp of a low-pressure mercury discharge containing a rare gas containing Ar as a buffer gas, -11 - 201025411 and mercury as a buffer gas is sealed in the arc tube. Next, a method of manufacturing the fluorescent lamp shown in Fig. 1 will be described. Fig. 4 is a flow chart showing the manufacturing steps of the fluorescent lamp shown in Fig. 1. Step 1 is a process of forming an ultraviolet reflector. A ruthenium suspension is prepared from cerium oxide particles and a sol-gel liquid containing alumina particles, and the solution is allowed to flow on the inner surface of the material for the light-emitting tube to prepare an ultraviolet reflector. The thickness of the ultraviolet reflector can be controlled by controlling the number of times of the flow or the flow rate of the suspension. After the ultraviolet reflector is formed, it is fired in the air at 500 to 1000 ° C to fix the ultraviolet light absorber. Step 2 is the process of creating a glass layer. First, the bulk glass was finely pulverized and applied to a ball mill. The pulverized glass powder is classified by a sieve to extract a glass powder having an average particle diameter of 0.5 to 1 μm (preferably 1 to 5 μm). The glass powder is mixed with, for example, nitrocellulose and acetic acid butyl vinegar at a weight ratio of 1:4 to 1:10, and the mixture is fully honed with a cerium alumina ball by a ball mill. Slurry. The slurry in which the glass powder is dispersed is hereinafter referred to as "glass slurry". Next, the glass paste was applied to the inner surface of the material for the light-emitting tube. The material for the light-emitting tube is a tube in which two exhaust pipes are formed at one end portion. Hold it vertically, and place one of the exhaust pipes in the liquid level of the container which has filled the glass paste to suck the slurry. The glass slurry system to be sucked is filled inside the material for the light-emitting tube, but can be coated on the inner surface by being extracted from the other exhaust pipe. Among them, by adjusting the viscosity or the number of coatings of the glass paste, the thickness of the finally obtained glass layer can be adjusted -12-201025411. The thickness of the glass paste is preferably in the range of 1 to 30 μm. Among them, in order to obtain high transmittance for predetermined ultraviolet light, the thickness of the glass layer is to be fluorescent in a post-maintaining process. It is preferable that the range of the bulk layer is as small as possible. This is based on the fact that the ultraviolet ray absorption in the glass layer is minimized. Next, the glass paste is dried. ^ Two exhaust gases are used for the material for the light-emitting tube. The tube was allowed to circulate dry nitrogen to evaporate the butyl acetate contained in the glass paste. As a result, a layer (glass layer) in which glass powder having a thickness of 1 to 30 μm was deposited was formed on the inner surface of the material for the arc tube. The gas used for drying may be dry air. Then, the glass layer is fired. Specifically, the glass powder is fired by heating the glass tube, but the firing condition is about 500 in the atmosphere. ~1 000 °C, in terms of time, when the holding time at the highest temperature is expressed as '0.2 to 1 hour. When using the borosilicate glass powder or the cinnamic acid glass powder, at 600~900 °C under Preferably, φ is combined with the particles by the firing process as shown above and melted in the glass tube. The glass layer is strongly bonded to the substrate. In addition, the glass layer is in a powder state. The function of the reflective layer of ultraviolet light generated in the luminaire. In the case where the glass layer does not rise to the melting temperature, it is usually maintained in a powdery form. However, it may be formed to further increase the temperature and melt it. Step 3 is a method of applying an engineering 〇 phosphor to apply the phosphor to the inner surface of the material for the light-emitting tube, and the method of coating is the same as that of step 2, and the light-emitting tube forming material is 13-201025411
料垂直保持，在充滿螢光體漿體的容器液面置入排氣管的 其中一方，由其中一方排氣管進行抽吸，將螢光體漿體上 吸而在管內部充塡螢光體漿體，之後，由另一方排氣管抽 出而進行塗佈。接著，使螢光體漿體乾燥。由發光管用材 料的其中一方排氣管A朝向另一方排氣管流通乾燥氮氣， 藉此使螢光體漿體所含有的乙酸丁酯蒸發。用在乾燥的氣 體亦可爲乾燥空氣。此外，爲燒成螢光體的工程。將發光 管用材料放入爐內而進行燒成。燒成條件係在大氣環境中 約爲500〜80(TC，以最高溫度下的保持時間而言，加熱 0.2〜1小時。在該燒成工程中，在螢光體層與玻璃層的交 界面發生玻璃表面軟化而使螢光體結著在玻璃層，結果獲 得強固的結合狀態。結果，獲得在由石英玻璃所構成的發 光管構成用材料的內表面上，依序層積有由低軟化點玻璃 粉末所構成的玻璃層、螢光體層的狀態。其中，若爲在大 氣中的劣化激烈的螢光體，係在升溫至硝化纖維素在大氣 中燃燒的溫度之後，藉由形成爲非氧化雰圍氣或還原雰圍 氣，而可進行至約800度程度的加熱。 步驟4係封入稀有氣體而予以密封的工程。具體而言 ，在將附著在排氣管內面的螢光體層及玻璃層去除之後， 將其中一方排氣管進行加熱密封，由另一方排氣管進行排 氣，封入預定的稀有氣體（封入物）而作氣密密封（tip-off) 。結果，獲得形成有氣密放電空間的螢光燈用發光管 。所封入的稀有氣體例如爲氙（Xe )、氪（K〇 、氬（Ar )。若爲第4圖的情形，係在排氣時亦同時封入水銀。 -14- 201025411 步驟5係安裝電極的工程。 在上所示之製造工程中，針對螢光燈列舉具體數値例The material is held vertically, and one of the exhaust pipes is placed on the liquid surface of the container filled with the phosphor slurry, and one of the exhaust pipes is sucked, and the phosphor slurry is sucked up to be filled with fluorescent light inside the tube. The body slurry is then applied by extraction from the other exhaust pipe. Next, the phosphor slurry is dried. The butyl acetate contained in the phosphor slurry is evaporated by flowing dry nitrogen gas from one of the exhaust pipes A of the light-emitting tube material toward the other exhaust pipe. The dry gas can also be dry air. In addition, it is a project to burn a phosphor. The material for the arc tube is placed in a furnace to be fired. The firing conditions are about 500 to 80 (TC, in the atmospheric environment, and are heated for 0.2 to 1 hour in terms of holding time at the highest temperature. In the firing process, the interface between the phosphor layer and the glass layer occurs. The surface of the glass is softened to cause the phosphor to adhere to the glass layer, and as a result, a strong bonding state is obtained. As a result, on the inner surface of the material for constituting the arc tube composed of quartz glass, a low softening point is sequentially laminated. A state of a glass layer or a phosphor layer composed of a glass powder. In the case where the phosphor is highly deteriorated in the atmosphere, the temperature is raised to a temperature at which the nitrocellulose is burned in the atmosphere, and then formed into a non-oxidation. The atmosphere or the reducing atmosphere can be heated to about 800 degrees. Step 4 is a process in which a rare gas is sealed and sealed, specifically, a phosphor layer and a glass layer to be attached to the inner surface of the exhaust pipe. After the removal, one of the exhaust pipes is heat-sealed, and the other exhaust pipe is exhausted, and a predetermined rare gas (enclosure) is sealed for tip-off. As a result, An arc tube for a fluorescent lamp having a hermetic discharge space. The rare gas enclosed is, for example, xenon (Xe), krypton (K〇, argon (Ar). If it is the case of Fig. 4, it is also when exhausting At the same time, the mercury is sealed. -14- 201025411 Step 5 is the installation of the electrode. In the manufacturing process shown above, the specific examples of the fluorescent lamps are listed.
Q 發光管的全長係由300〜2000mm的範圍中作選擇， 例如1500mm，發光管壁厚爲1〜4mm，例如2mm。此外 ，螢光體層的平均厚度係由10〜20 μπι的範圍中作選擇， 例如1 5 μιη，形成在螢光體層與發光管之間之由低軟化點 玻璃所構成的玻璃層的厚度係由1〜3 0 μηι的範圍中作選擇 ’例如1 〇 μ m。 接著說明表現本發明之效果的實驗》 將與第3圖所示之螢光燈爲相同形態的燈設爲燈1， 由第3圖所示之螢光燈，將未存在有紫外線反射體4的燈 設爲燈2，測定出出射面中的相對照度。相對照度係使用 相對於比較燈之照度的相對値。 在第6圖顯不相對照度値，在第7圖顯示發光光譜。 根據實驗結果，使用紫外線反射體的燈1相對於比較 燈，在波長300〜34〇nm中，相對照度値爲「4.4」，在波 長3 40〜4 OOnm中’相對照度値爲「3.8」。此外，僅設有 螢光體層的燈2相對於比較燈，在波長300〜340nm中， 相對照度値爲「3.1」，在波長340〜400nm中，相對照度 値爲「2.6」。 此外’第7圖所示之發光光譜係在縱軸表示以比較燈 之波長340nm中的照度爲基準的相對値。設有紫外線反射 體的燈1或僅有螢光體層的燈2均在波長3 4 0nm附近具有 -15- 201025411 峰値，可知與燈2的照度相比較，燈1的照度係非常高。 以上說明的螢光燈係一對電極均位於放電空間之外部 的位置者，但是並非限定於如上所示之例，若爲例如至少 一方電極被配置在內部者亦可適用。其中，當在放電空間 內配置電極時，則在密封工程之前安裝電極即可。 如以上所示，本發明之螢光燈係在石英玻璃製發光管 與螢光體層之間形成有由軟化點比石英玻璃的軟化點爲更 低的材料所構成的玻璃層，因此僅以玻璃層的軟化溫度來 使其加熱，即可使螢光體附著在玻璃層。此外，玻璃層與 石英玻璃亦可以玻璃層的軟化溫度加以固接。此外，由於 在玻璃層與發光管之間具有紫外線反射體，因此藉由使紫 外線在特定方向反射，可獲得高放射效率。 【圖式簡單說明】 第1圖係顯示本發明之螢光燈之構成。 第2圖係顯示本發明之螢光燈之其他實施形態。 第3圖係顯示本發明之螢光燈之其他實施形態。 第4圖係顯示本發明之螢光燈之其他實施形態。 第5圖係顯示本發明之螢光燈之製造方法。 第6圖係顯示本發明之實驗結果。 第7圖係顯示本發明之實驗結果。 【主要元件符號說明】 1 :發光管 -16- 201025411 2、2a、2b :電極 3 :保護膜 4 :紫外線反射體 5 '·玻璃層 6 :螢光體層 7 :始動輔助用導電性構件 1 1 :密封板Q The total length of the arc tube is selected from the range of 300 to 2000 mm, for example, 1500 mm, and the wall thickness of the arc tube is 1 to 4 mm, for example, 2 mm. Further, the average thickness of the phosphor layer is selected from the range of 10 to 20 μm, for example, 15 μm, and the thickness of the glass layer formed of the low-softening point glass formed between the phosphor layer and the arc tube is Select a range of 1 to 3 0 μηι 'for example, 1 〇μ m. Next, an experiment showing the effects of the present invention will be described. A lamp having the same configuration as that of the fluorescent lamp shown in Fig. 3 is used as the lamp 1. In the case of the fluorescent lamp shown in Fig. 3, the ultraviolet reflector 4 is not present. The lamp was set to lamp 2 and the relative contrast in the exit face was measured. The relative contrast uses relative enthalpy relative to the illumination of the comparison lamp. In Fig. 6, there is no contrast, and in Fig. 7, the luminescence spectrum is shown. According to the experimental results, the lamp 1 using the ultraviolet reflector has a relative contrast 「 of "4.4" at a wavelength of 300 to 34 〇 nm and a contrast ratio of "3.8" at a wavelength of 3 40 to 400 nm with respect to the comparison lamp. Further, the lamp 2 provided with only the phosphor layer has a contrast ratio "3.1" at a wavelength of 300 to 340 nm and a "2.6" at a wavelength of 340 to 400 nm with respect to the comparison lamp. Further, the luminescence spectrum shown in Fig. 7 indicates the relative enthalpy based on the illuminance at a wavelength of 340 nm of the comparative lamp on the vertical axis. The lamp 1 having the ultraviolet reflector or the lamp 2 having only the phosphor layer has a peak of -15-201025411 around the wavelength of 340 nm, and it is understood that the illuminance of the lamp 1 is very high as compared with the illuminance of the lamp 2. The fluorescent lamp described above is a position in which a pair of electrodes are located outside the discharge space. However, the present invention is not limited to the above-described example. For example, at least one of the electrodes may be disposed inside. Among them, when the electrodes are arranged in the discharge space, the electrodes may be mounted before the sealing process. As described above, the fluorescent lamp of the present invention has a glass layer formed of a material having a softening point lower than a softening point of quartz glass between the quartz glass light-emitting tube and the phosphor layer, and therefore only glass. The softening temperature of the layer is heated to adhere the phosphor to the glass layer. Further, the glass layer and the quartz glass may be fixed by the softening temperature of the glass layer. Further, since the ultraviolet reflecting body is provided between the glass layer and the arc tube, high radiation efficiency can be obtained by reflecting the ultraviolet rays in a specific direction. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the configuration of a fluorescent lamp of the present invention. Fig. 2 is a view showing another embodiment of the fluorescent lamp of the present invention. Fig. 3 is a view showing another embodiment of the fluorescent lamp of the present invention. Fig. 4 is a view showing another embodiment of the fluorescent lamp of the present invention. Fig. 5 is a view showing a method of manufacturing the fluorescent lamp of the present invention. Figure 6 shows the experimental results of the present invention. Figure 7 shows the experimental results of the present invention. [Explanation of main component symbols] 1 : Light-emitting tube-16- 201025411 2, 2a, 2b: Electrode 3: Protective film 4: Ultraviolet reflector 5'· Glass layer 6: Phosphor layer 7: Conductive member for starting auxiliary 1 1 :sealing plate
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