CN85100703B - Compact-porous-compact sandwich composite piezoelectric ceramic and process thereof - Google Patents
Compact-porous-compact sandwich composite piezoelectric ceramic and process thereof Download PDFInfo
- Publication number
- CN85100703B CN85100703B CN85100703A CN85100703A CN85100703B CN 85100703 B CN85100703 B CN 85100703B CN 85100703 A CN85100703 A CN 85100703A CN 85100703 A CN85100703 A CN 85100703A CN 85100703 B CN85100703 B CN 85100703B
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- China
- Prior art keywords
- porous
- piezoelectric ceramic
- sandwich
- compact
- layer
- Prior art date
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- 239000000919 ceramic Substances 0.000 title claims abstract description 32
- 239000002131 composite material Substances 0.000 title claims abstract description 13
- 238000000034 method Methods 0.000 title description 7
- 239000000463 material Substances 0.000 claims abstract description 19
- 229910010293 ceramic material Inorganic materials 0.000 claims abstract description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 239000004332 silver Substances 0.000 claims description 8
- 150000001875 compounds Chemical class 0.000 claims description 7
- 238000005516 engineering process Methods 0.000 claims description 7
- 229910052573 porcelain Inorganic materials 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 238000005245 sintering Methods 0.000 claims description 6
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 4
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000000748 compression moulding Methods 0.000 claims 1
- 230000035945 sensitivity Effects 0.000 abstract description 2
- 229920000642 polymer Polymers 0.000 description 6
- 230000010287 polarization Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- NKZSPGSOXYXWQA-UHFFFAOYSA-N dioxido(oxo)titanium;lead(2+) Chemical compound [Pb+2].[O-][Ti]([O-])=O NKZSPGSOXYXWQA-UHFFFAOYSA-N 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- 229910002113 barium titanate Inorganic materials 0.000 description 1
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 1
- 244000309464 bull Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229910052451 lead zirconate titanate Inorganic materials 0.000 description 1
- HFGPZNIAWCZYJU-UHFFFAOYSA-N lead zirconate titanate Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ti+4].[Zr+4].[Pb+2] HFGPZNIAWCZYJU-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Compositions Of Oxide Ceramics (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
The sandwich type structure is used to prepare compact-porous-compact sandwich composite piezoelectric ceramic material with low density, low dielectric constant and piezoelectric voltage coefficient g constant higher than that of common piezoelectric ceramic. The hydrophone made of the material has wide frequency band and high sensitivity. The sandwich structure is suitable for preparing the (3-3) mode structure and the composite piezoelectric ceramic material with the (3-1) mode structure.
Description
The invention belongs to compound piezoceramic material and preparation technology.
That material such as piezoelectric ceramic such as barium titanate, lead zirconate titanate is widely used in already is ultrasonic, in the underwater acoustic transducer.Along with rapid development of science and technology, original single-phase piezoceramic material can not be satisfied the demand far away, discovered in recent years piezoelectric ceramic and the compound piezoceramic material of high molecular polymer two-phase have some particular performances, thereby the research of compound piezoceramic material grows a lot in recent years.People such as U.S. T.R.Shrout were published in ((Mat.Res.Bull.) 14 in 1979,1553(1979)) use comparatively simple ceramic process to make the flexible piezoelectric ceramic composite of (3-3) pattern, its piezoelectric voltage coefficient g constant is than the big order of magnitude of original single-phase lead titanate piezoelectric ceramics.People such as Japan M.Miyashita are published in ((Ferroelectrics) 28 397(1980)) be arranged in trapezoidal trellis with the lead titanate piezoelectric ceramics bar, and in the space, inject high molecular polymer and also made (3-3) pattern, the compound piezoceramic material that performance is similar.But because porous ceramic surface can't directly apply silver paste, filling high molecular polymer in the pore of porous body pottery is made electrode at the high molecular polymer of the same race of surface applied argentiferous, like this complex process then earlier.
The piezoceramic material of densification-porous-fine and close sandwich composite construction that the objective of the invention is to propose specific prepared, the complexity and the electrode of filling high molecular polymer lays problem in the prior art thereby overcome.
The present invention adopts thickness to account for two parallel surfaces of 10% to 20% fine and close piezoelectric ceramic " covering " of sample gross thickness at the porous body piezoelectric ceramic, making coating silver paste burning infiltration silver electrode uses, because fine and close piezoelectric ceramic and porous piezoceramics are taken from the piezoelectric ceramic of same kind and are pressed into integral body, just become the monoblock sintered body behind the sintering, the composite piezoelectric pottery of three-layer sandwich type differs greatly the porosity and but is linked to be whole ad hoc structure like this, has solved the silver electrode coating problem of porous ceramic dexterously.After the sample burning infiltration silver electrode, near Curie temperature, apply direct voltage and polarize.
The technology key of material preparation of the present invention at first is to make the base substrate with three-layer sandwich structure, makes the three-layer sandwich piezoelectric ceramic body then.The operation of its pressing blank is as follows: get a flexible piezoelectric ceramic powder and be used for platen press and be prepared into the stand-by porcelain of compacted zone (be called for short first material), get the flexible piezoelectric ceramic powder of a same type again, sneaking into granularity is that the spherical polymethyl methacrylate powder of 120 purposes is 17% by weight percentage, also can be 23% or 27% fully mix after, be prepared into the stand-by porcelain in porous intermediate layer (being called for short the second material) with dry pressing equally, during blank forming, two parts of first sections that take by weighing equivalent are respectively charged into the bottom and the top layer of punching block, the second material that the takes by weighing desired thickness intermediate layer of punching block of packing into, use suitable pressure then, once be pressed into the sandwich composite ceramics base substrate of three layers of one.In the operation, must keep every layer of porcelain thickness fully all thick.The method of this compacting three-layer sandwich structure is equally applicable to the three-layer sandwich composite ceramics base substrate of preparation (3-1) pattern, venerates when compacting the polymethyl methacrylate plate that designs shape is done the intermediate layer, and once compacting forms then.
Will guarantee before the porcelain base sintering that three-decker is an overall structure all the time, importantly sample is folded is embedded in the alumina crucible that bedding and padding are housed, and with per hour 40 ℃ programming rate intensification, carries out plastic removal until 600 ℃.And then covering the alumina crucible seal cover board, direct sintering in the Elema electric furnace goes out satisfied sandwich sintered body without shove charge sintering again like this.The used sintering temperature of the present invention is decided by selected flexible piezoelectric ceramic powder, the three-layer sandwich composite ceramics that sinters, because first type surface is a ceramic of compact, therefore can carry out plane machining by common piezoelectric ceramic, the sample that processes is coated silver paste, burning infiltration silver electrode on first type surface after cleaning, polarize then.
Material polarization condition of the present invention is identical with selected flexible piezoelectric ceramic material polarization condition, promptly applying the direct voltage that is about tens volts every millimeter near the employing Curie temperature in air polarizes, along with improving gradually, the decline rapidly of temperature applies direct voltage then, DC voltage rising is to 300 volts every millimeter when temperature drops to room temperature, overall process is lasted half an hour approximately, and this polarization method also is applicable to general flexible piezoelectric ceramic.
The characteristics of material of the present invention are that density is low, and permittivity is little, and piezoelectric voltage coefficient is than the big order of magnitude of common piezoelectric ceramic.Example of the present invention is: with component be
〔Pb（Li
1/4Sb
3/4）
0.05Zr
0.49Ti
0.46O
3〕
The flexible piezoelectric ceramic powder prepares the three-layer sandwich compound piezoceramic material, and when the introducing amount of the polymethyl methacrylate of porous ceramic bodies is 17%, 23% or 27% o'clock by weight percentage, its density (ρ) is at (3.7～2.8) gram per centimeter
3, relative dielectric constant (ε
T 33/ ε
0) be 430～250, static piezoelectric voltage coefficient gh is (70～110) * 10
-3Volt rice/newton.
The characteristics of material of the present invention also have been to simplify the technology of porous ceramic coated electrode, thereby make the practicability of (3-3) pattern compound piezoceramic material become possibility.In addition, the porous intermediate layer of three-layer sandwich composite piezoelectric pottery does not need the filling high molecular polymer just can directly use, and this is easier than at present external existing technology.We make high sensitivity broadband hydrophone with material of the present invention, and its characteristic is better than the hydrophone that common piezoelectric ceramic of the same type is made greatly.
Claims (4)
1, a kind of with the compound piezoceramic material that fine and close piezoelectric ceramic and porous piezoceramics constituted, it is characterized in that it contains with the alternate three-layer sandwich type composite piezoelectric pottery of being formed of compacted zone-porous layer-compacted zone.
2,, it is characterized in that said two its thickness of compacted zone are respectively 10% to 20% of gross thickness according to the said ceramic material of claim 1.
3, according to the said ceramic material of claim 1, it is characterized in that said porous layer is that to sneak into granularity in common flexible piezoelectric ceramic porcelain be the spherical polymethyl methacrylate powder of 120 purposes, its introducing amount is 17% by weight percentage, also can be 23% or 27%.
4, a kind of technology of making the said sandwich composite ceramic material of claim 1 that is exclusively used in, it is characterized in that including top layer and bottom that the stand-by porcelain of the compacted zone of getting two parts of equivalent is respectively charged into punching block, get pack into the intermediate layer of punching block of the stand-by porcelain in porous intermediate layer again, take disposable compression molding, form the sandwich porous body, plastic removal sintering, burning infiltration silver electrode and four steps of high-temperature poling in air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100703A CN85100703B (en) | 1985-04-01 | 1985-04-01 | Compact-porous-compact sandwich composite piezoelectric ceramic and process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85100703A CN85100703B (en) | 1985-04-01 | 1985-04-01 | Compact-porous-compact sandwich composite piezoelectric ceramic and process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85100703A CN85100703A (en) | 1986-09-24 |
| CN85100703B true CN85100703B (en) | 1987-03-25 |
Family
ID=4791375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85100703A Expired CN85100703B (en) | 1985-04-01 | 1985-04-01 | Compact-porous-compact sandwich composite piezoelectric ceramic and process thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85100703B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100530737C (en) * | 2007-03-12 | 2009-08-19 | 中国科学院声学研究所 | A high-frequency 3-3 compound piezoelectricity porcelain component |
| CN103553601B (en) * | 2013-11-11 | 2015-06-17 | 中国科学院上海硅酸盐研究所 | Three-layer structure lead zirconate titanate ferroelectric ceramic material and preparation method thereof |
| CN106891599B (en) * | 2015-12-18 | 2019-02-19 | 辽宁法库陶瓷工程技术研究中心 | A kind of preparation method of yttrium stable zirconium oxide ceramic insulating material |
| CN105669189B (en) * | 2015-12-30 | 2018-09-18 | 潮州三环（集团）股份有限公司 | A kind of shading whiteware and preparation method thereof |
-
1985
- 1985-04-01 CN CN85100703A patent/CN85100703B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN85100703A (en) | 1986-09-24 |
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