GB1335842A - Method of manufacturing a silicon nitride body - Google Patents

Method of manufacturing a silicon nitride body

Info

Publication number
GB1335842A
GB1335842A GB1281870A GB1335842DA GB1335842A GB 1335842 A GB1335842 A GB 1335842A GB 1281870 A GB1281870 A GB 1281870A GB 1335842D A GB1335842D A GB 1335842DA GB 1335842 A GB1335842 A GB 1335842A
Authority
GB
United Kingdom
Prior art keywords
polymer
hrs
dispersant
heating
silicon nitride
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
GB1281870A
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
Joseph Lucas Industries Ltd
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 Lucas Industries Ltd, Joseph Lucas Industries Ltd filed Critical Lucas Industries Ltd
Publication of GB1335842A publication Critical patent/GB1335842A/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
    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/71—Ceramic products containing macroscopic reinforcing agents
    • C04B35/78—Ceramic products containing macroscopic reinforcing agents containing non-metallic materials
    • C04B35/80—Fibres, filaments, whiskers, platelets, or the like

Landscapes

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

Abstract

1335842 Silicon nitride bodies JOSEPH LUCAS (INDUSTRIES) Ltd 19 April 1971 [17 March 1970 25 April 1970] 12818/70 and 19987/70 Heading C1A A silicon nitride body is made by: (a) mixing powdered silicon in a dispersion of a polymer in a liquid which does not react with Si; (b) heating to remove the dispersant; (c) forming a body from the mixture of Si and the polymer either before or after step (b); (d) removing the polymer; (e) heating the body in a nitrogencontaining atmosphere to form silicon nitride. Step (d) may be carried out by leaching or by heating, conveniently in a reducing atmosphere, e.g. in a two stage heating at 450‹ C. then 900- 1150‹ C. The polymer may be an acrylic polymer and the dispersant water. The body may be formed by pressing or rolling if the body is formed before removal of the dispersant; after removal of the dispersant it may be pressed to remove air voids and part of the dispersant, and/or further shaped. The nitriding step may be carried out in a 10% H 2 -90% N 2 gas mixture at 1350-1450‹ C. in a two stage heating process, e.g. at 1350‹ C. for 16 hrs. then 1450‹ C. for 7 hrs. Alternatively the polymer removal step and the nitriding step may both be carried out in a nitriding atmosphere in the same furnace, e.g. by heating the shaped body in the above gas mixture at a rate of 400‹ C./hr. to 1250‹ C., holding the temperature constant for 3 hrs. then raising the temperature to 1350‹ C. for 16 hrs. then 1450‹ C. for 7 hrs. Fibrous refractory material, e.g. silicon nitride or alumino-silicate fibres may be added to the mixture of the silicon and dispersion of polymer.
GB1281870A 1970-03-17 1971-04-19 Method of manufacturing a silicon nitride body Expired GB1335842A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1281870 1970-03-17

Publications (1)

Publication Number Publication Date
GB1335842A true GB1335842A (en) 1973-10-31

Family

ID=10011698

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1281870A Expired GB1335842A (en) 1970-03-17 1971-04-19 Method of manufacturing a silicon nitride body

Country Status (2)

Country Link
GB (1) GB1335842A (en)
SU (1) SU559636A3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3507307A1 (en) * 1984-03-03 1985-10-03 Kurosaki Refractories Co., Ltd., Kitakyushu, Fukuoka METHOD FOR PRODUCING A Sintered Silicon Nitride Product
GB2163737A (en) * 1984-08-07 1986-03-05 Kurosaki Refractories Co Method for production of a high-density silicon nitride reaction sintered body
US4585500A (en) * 1983-12-01 1986-04-29 Ceraver Method of manufacturing a reinforced composite structure of ceramic material
US4696710A (en) * 1983-05-25 1987-09-29 Louis Minjolle Method of manufacturing a composite reinforced structure of ceramics material
US4832888A (en) * 1984-03-03 1989-05-23 Kurosaki Refractories Co., Ltd. Method for producing high-density silicon nitride sintered product

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4696710A (en) * 1983-05-25 1987-09-29 Louis Minjolle Method of manufacturing a composite reinforced structure of ceramics material
US4585500A (en) * 1983-12-01 1986-04-29 Ceraver Method of manufacturing a reinforced composite structure of ceramic material
DE3507307A1 (en) * 1984-03-03 1985-10-03 Kurosaki Refractories Co., Ltd., Kitakyushu, Fukuoka METHOD FOR PRODUCING A Sintered Silicon Nitride Product
US4832888A (en) * 1984-03-03 1989-05-23 Kurosaki Refractories Co., Ltd. Method for producing high-density silicon nitride sintered product
GB2163737A (en) * 1984-08-07 1986-03-05 Kurosaki Refractories Co Method for production of a high-density silicon nitride reaction sintered body

Also Published As

Publication number Publication date
SU559636A3 (en) 1977-05-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee