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GB1490543A - Porous materials - Google Patents

Porous materials

Info

Publication number
GB1490543A
GB1490543A GB1166674A GB1166674A GB1490543A GB 1490543 A GB1490543 A GB 1490543A GB 1166674 A GB1166674 A GB 1166674A GB 1166674 A GB1166674 A GB 1166674A GB 1490543 A GB1490543 A GB 1490543A
Authority
GB
United Kingdom
Prior art keywords
binder
silicon nitride
specified
mixture
additive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB1166674A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB1166674A priority Critical patent/GB1490543A/en
Publication of GB1490543A publication Critical patent/GB1490543A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0022—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors
    • C04B38/0025—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors starting from inorganic materials only, e.g. metal foam; Lanxide type products
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2072—Other inorganic materials, e.g. ceramics the material being particulate or granular
    • B01D39/2075—Other inorganic materials, e.g. ceramics the material being particulate or granular sintered or bonded by inorganic agents
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/06—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron
    • C01B21/068—Binary compounds of nitrogen with metals, with silicon, or with boron, or with carbon, i.e. nitrides; Compounds of nitrogen with more than one metal, silicon or boron with silicon
    • C01B21/0682—Preparation by direct nitridation of silicon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/58—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides
    • C04B35/584—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride
    • C04B35/591—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on borides, nitrides, i.e. nitrides, oxynitrides, carbonitrides or oxycarbonitrides or silicides based on silicon nitride obtained by reaction sintering
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2006/00—Physical properties of inorganic compounds
    • C01P2006/14—Pore volume

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Ceramic Products (AREA)

Abstract

1490543 Porous silicon nitride UNITED KINGDOM ATOMIC ENERGY AUTHORITY 11 March 1975 [15 March 1974] 11666/74 Heading ClA [Also in Division C7] Porous silicon nitride is prepared by: (i) preparing a green mixture comprising silicon powder, a binder and an inert, removable additive powder, wherein the additive has a particle size of less than 25 microns; (ii) curing the binder in the mixture; (iii) heating so as to remove the binder; and (iv) firing in a nitriding atmosphere to convert the silicon to silicon nitride and thereby produce the porous silicon nitride; in which method the additive is removed between steps (ii) and (iv). Suitable additives are celluose, amorphous carbon, graphite, and organic plastics. The binder may be a thermoplastic binder or a setting binder or both. Polyvinyl butyral is specified. The mixture may also include a plasticizer (dibutyl phthalate specified) and a solvent for the binder (methyl ethyl ketone specified).
GB1166674A 1975-03-11 1975-03-11 Porous materials Expired GB1490543A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1166674A GB1490543A (en) 1975-03-11 1975-03-11 Porous materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1166674A GB1490543A (en) 1975-03-11 1975-03-11 Porous materials

Publications (1)

Publication Number Publication Date
GB1490543A true GB1490543A (en) 1977-11-02

Family

ID=9990458

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1166674A Expired GB1490543A (en) 1975-03-11 1975-03-11 Porous materials

Country Status (1)

Country Link
GB (1) GB1490543A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061611A1 (en) * 1981-03-27 1982-10-06 The Boeing Company Method for producing pre-shaped alpha-silicon nitride whisker compacts and loose whiskers for composite material reinforcement
US4579699A (en) * 1983-09-29 1986-04-01 The Boeing Company Method for making α-Si3 N4 whiskers and articles therefrom
WO1988000933A1 (en) * 1986-08-07 1988-02-11 Ceramiques Techniques Desmarquest Method for fabricating moulds made of porous silicone nitride for pressure casting
EP0251634A3 (en) * 1986-06-27 1989-10-18 Stemcor Corporation Molten metal filter medium and method for making same
US5369063A (en) * 1986-06-27 1994-11-29 Metaullics Systems Co., L.P. Molten metal filter medium and method for making same
US6367412B1 (en) * 2000-02-17 2002-04-09 Applied Materials, Inc. Porous ceramic liner for a plasma source
EP1160223A4 (en) * 1999-12-24 2003-08-27 Asahi Glass Co Ltd SILICON NITRIDE FILTER AND MANUFACTURING METHOD THEREOF

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0061611A1 (en) * 1981-03-27 1982-10-06 The Boeing Company Method for producing pre-shaped alpha-silicon nitride whisker compacts and loose whiskers for composite material reinforcement
US4388255A (en) 1981-03-27 1983-06-14 Boeing Aerospace Co. (A Division Of The Boeing Company) Method for producing pre-shaped α-silicon nitride whisker compacts and loose whiskers for composite material reinforcement
US4579699A (en) * 1983-09-29 1986-04-01 The Boeing Company Method for making α-Si3 N4 whiskers and articles therefrom
EP0251634A3 (en) * 1986-06-27 1989-10-18 Stemcor Corporation Molten metal filter medium and method for making same
US5369063A (en) * 1986-06-27 1994-11-29 Metaullics Systems Co., L.P. Molten metal filter medium and method for making same
WO1988000933A1 (en) * 1986-08-07 1988-02-11 Ceramiques Techniques Desmarquest Method for fabricating moulds made of porous silicone nitride for pressure casting
FR2602504A1 (en) * 1986-08-07 1988-02-12 Desmarquest Ceramiques Tech PROCESS FOR THE PRODUCTION OF OPEN-POROSITY SILICON NITRIDE MATERIALS AND APPLICATION TO POROUS MOLDS
EP1160223A4 (en) * 1999-12-24 2003-08-27 Asahi Glass Co Ltd SILICON NITRIDE FILTER AND MANUFACTURING METHOD THEREOF
US6849213B2 (en) 1999-12-24 2005-02-01 Asahi Glass Company, Limited Method for producing silicon nitride filter
EP1728775A3 (en) * 1999-12-24 2007-05-02 Asahi Glass Company, Limited Silicon nitride filter and method for its production
US6367412B1 (en) * 2000-02-17 2002-04-09 Applied Materials, Inc. Porous ceramic liner for a plasma source

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee