GB1527068A - Reducing the permeability of silicon nitride - Google Patents

Reducing the permeability of silicon nitride

Info

Publication number
GB1527068A
GB1527068A GB32709/77A GB3270977A GB1527068A GB 1527068 A GB1527068 A GB 1527068A GB 32709/77 A GB32709/77 A GB 32709/77A GB 3270977 A GB3270977 A GB 3270977A GB 1527068 A GB1527068 A GB 1527068A
Authority
GB
United Kingdom
Prior art keywords
silicon nitride
silicon
permeability
reducing
aug
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
GB32709/77A
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.)
Rosenthal AG
Original Assignee
Rosenthal AG
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 Rosenthal AG filed Critical Rosenthal AG
Publication of GB1527068A publication Critical patent/GB1527068A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
    • B01D67/0081—After-treatment of organic or inorganic membranes
    • B01D67/0088—Physical treatment with compounds, e.g. swelling, coating or impregnation
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/02—Inorganic material
    • B01D71/0215—Silicon carbide; Silicon nitride; Silicon oxycarbide
    • 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
    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B13/00—Diaphragms; Spacing elements
    • C25B13/04—Diaphragms; Spacing elements characterised by the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0464—Impregnants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/04—Additives and treatments of the filtering material
    • B01D2239/0471—Surface coating material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/10—Filtering material manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
    • B01D2239/12—Special parameters characterising the filtering material
    • B01D2239/1208—Porosity

Landscapes

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

Abstract

1527068 Silicon nitride ROSENTHAL AG 4 Aug 1977 [5 Aug 1976] 32709/77 Heading C1A [Also in Division C7] The gas permeability of a sintered porous silicon nitride body is reduced by saturating the body with a silicon halide and then precipitating silicon imide in the pores of the body by treatment with ammonia, the silicon imide thereafter being converted into silicon nitride by firing in a nitrogen atmosphere.
GB32709/77A 1976-08-05 1977-08-04 Reducing the permeability of silicon nitride Expired GB1527068A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2635167A DE2635167C2 (en) 1976-08-05 1976-08-05 Process for reducing the gas permeability of porous bodies made of reaction-sintered silicon nitride

Publications (1)

Publication Number Publication Date
GB1527068A true GB1527068A (en) 1978-10-04

Family

ID=5984755

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32709/77A Expired GB1527068A (en) 1976-08-05 1977-08-04 Reducing the permeability of silicon nitride

Country Status (3)

Country Link
DE (1) DE2635167C2 (en)
FR (1) FR2360533A1 (en)
GB (1) GB1527068A (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54145400A (en) * 1978-05-08 1979-11-13 Ube Ind Ltd Production of metal nitride powder
JPS61295274A (en) * 1985-06-24 1986-12-26 チッソ株式会社 Manufacture of ceramic formed body
DE3717670A1 (en) * 1986-11-21 1988-06-01 Hoechst Ceram Tec Ag METHOD FOR SEALING CERAMIC HEAT EXCHANGERS
US5004544A (en) * 1989-11-13 1991-04-02 Norton Company Reaction bonded silicon nitride filtration membranes
DE69800531T2 (en) * 1997-04-09 2001-09-27 Societe Des Ceramiques Techniques, Bazet Macroporous support with a porosity gradient and method for its production

Also Published As

Publication number Publication date
DE2635167C2 (en) 1978-06-01
DE2635167B1 (en) 1977-10-06
FR2360533B3 (en) 1980-07-11
FR2360533A1 (en) 1978-03-03

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee