GB1525610A - Silicon nitride - Google Patents

Silicon nitride

Info

Publication number
GB1525610A
GB1525610A GB5321775A GB5321775A GB1525610A GB 1525610 A GB1525610 A GB 1525610A GB 5321775 A GB5321775 A GB 5321775A GB 5321775 A GB5321775 A GB 5321775A GB 1525610 A GB1525610 A GB 1525610A
Authority
GB
United Kingdom
Prior art keywords
iron
silicon nitride
compound
iron oxide
solution
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
GB5321775A
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.)
Secretary of State for Defence Canada
UK Secretary of State for Defence
Original Assignee
Secretary of State for Defence Canada
UK Secretary of State for Defence
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 Secretary of State for Defence Canada, UK Secretary of State for Defence filed Critical Secretary of State for Defence Canada
Priority to GB5321775A priority Critical patent/GB1525610A/en
Publication of GB1525610A publication Critical patent/GB1525610A/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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • 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
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Manufacturing & Machinery (AREA)
  • Catalysts (AREA)

Abstract

1525610 Silicon nitride DEFENCE SECRETARY OF STATE FOR 30 Dec 1976 [30 Dec 1975] 53217/75 Heading C1A Reaction-bonded silicon nitride material is subjected to impregnation to introduce iron oxide therein. Suitably, the material is exposed to an iron-containing compound to deposit the compound in the silicon nitride material, followed by heating to decompose the deposited compound and form the iron oxide. Alternatively exposure to the iron-containing compound may be carried out at a sufficiently elevated temperature to ensure deposition of iron in the reaction-bonded silicon nitride in the form of iron oxide. Impregnation may be effected by placing the silicon nitride in a solution of the compound, suitably a solution of an iron salt in its own water of crystallization, or by vacuum impregnation using a solution of an ironcontaining compound. Colloidal iron compounds e.g. colloidal hydrated or hydroxylated oxides, organic compounds of iron, e.g. the acetate, oxalate or oleate, may be used, readily decomposable oxygen-containing iron salts being preferred, especially ferric nitrate hexahydrate or nonahydrate. The treated silicon nitride may be dried at about 150‹ C and the iron oxide formed by heating to 850‹ C.
GB5321775A 1976-12-30 1976-12-30 Silicon nitride Expired GB1525610A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB5321775A GB1525610A (en) 1976-12-30 1976-12-30 Silicon nitride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5321775A GB1525610A (en) 1976-12-30 1976-12-30 Silicon nitride

Publications (1)

Publication Number Publication Date
GB1525610A true GB1525610A (en) 1978-09-20

Family

ID=10467024

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5321775A Expired GB1525610A (en) 1976-12-30 1976-12-30 Silicon nitride

Country Status (1)

Country Link
GB (1) GB1525610A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5643842A (en) * 1992-10-14 1997-07-01 Isuzu Ceramics Research Institute Co., Ltd. Low-friction ceramics

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5643842A (en) * 1992-10-14 1997-07-01 Isuzu Ceramics Research Institute Co., Ltd. Low-friction ceramics

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Legal Events

Date Code Title Description
PS Patent sealed
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee