GB1431780A - Manufacture of silicon nitride products - Google Patents

Manufacture of silicon nitride products

Info

Publication number
GB1431780A
GB1431780A GB4616772A GB4616772A GB1431780A GB 1431780 A GB1431780 A GB 1431780A GB 4616772 A GB4616772 A GB 4616772A GB 4616772 A GB4616772 A GB 4616772A GB 1431780 A GB1431780 A GB 1431780A
Authority
GB
United Kingdom
Prior art keywords
furnace
bed
silicon nitride
thermo
temperature
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
GB4616772A
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
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 filed Critical Lucas Industries Ltd
Priority to GB4616772A priority Critical patent/GB1431780A/en
Priority to AU60815/73A priority patent/AU6081573A/en
Priority to NL7313436A priority patent/NL7313436A/xx
Priority to DE19732350031 priority patent/DE2350031A1/en
Priority to BE136400A priority patent/BE805732A/en
Priority to SU1965105A priority patent/SU505337A3/en
Priority to CH1427373A priority patent/CH591400A5/xx
Priority to JP11275673A priority patent/JPS4994600A/ja
Publication of GB1431780A publication Critical patent/GB1431780A/en
Expired legal-status Critical Current

Links

Classifications

    • 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

Abstract

1431780 Silicon nitride powder JOSEPH LUCAS (INDUSTRIES) Ltd 18 Sept 1973 [6 Oct 1972] 46167/72 Heading C1A Silicon nitride powder is made by forming a bed of silicon powder in a furnace to which an atmosphere containing reactable nitrogen is supplied, locating a first thermo-couple in the furnace outside the bed and at least two further thermo-couples in the bed spaced apart from each other and from the first thermo-couple, supplying an atmosphere containing reactable nitrogen to the furnace and heating so that α- silicon nitride is formed, controlling the partial pressure of reactable nitrogen in the furnace in accordance with the difference between the temperature outside the bed measured by the first thermo-couple and the highest temperature measured by the further thermo-couples so as to ensure that the temperature throughout the bed does not exceed the value above which #- silicon nitride is formed, the partial pressure of reactable nitrogen in the furnace being controlled by either (a) diluting the reactable nitrogen in the furnace atmosphere, or (b) evacuating the furnace. The bed may contain a mixture of silicon powder and α-silicon nitride powder. When the temperature of the bed reaches a predetermined value, the supply of heat to the furnace may be reduced. Preferably the temperature in the bed does not exceed a value between 1150‹ and 1350‹ C.
GB4616772A 1972-10-06 1972-10-06 Manufacture of silicon nitride products Expired GB1431780A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
GB4616772A GB1431780A (en) 1972-10-06 1972-10-06 Manufacture of silicon nitride products
AU60815/73A AU6081573A (en) 1972-10-06 1973-09-27 Manufacture of silicon nitride products
NL7313436A NL7313436A (en) 1972-10-06 1973-09-28
DE19732350031 DE2350031A1 (en) 1972-10-06 1973-10-05 METHOD AND DEVICE FOR THE PRODUCTION OF SILICON NITRIDE POWDER
BE136400A BE805732A (en) 1972-10-06 1973-10-05 MANUFACTURING PROCESS OF PRODUCTS BASED ON SILICON NITRIDE
SU1965105A SU505337A3 (en) 1972-10-06 1973-10-05 The method of obtaining silicon nitride powder
CH1427373A CH591400A5 (en) 1972-10-06 1973-10-05
JP11275673A JPS4994600A (en) 1972-10-06 1973-10-06

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4616772A GB1431780A (en) 1972-10-06 1972-10-06 Manufacture of silicon nitride products

Publications (1)

Publication Number Publication Date
GB1431780A true GB1431780A (en) 1976-04-14

Family

ID=10440130

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4616772A Expired GB1431780A (en) 1972-10-06 1972-10-06 Manufacture of silicon nitride products

Country Status (8)

Country Link
JP (1) JPS4994600A (en)
AU (1) AU6081573A (en)
BE (1) BE805732A (en)
CH (1) CH591400A5 (en)
DE (1) DE2350031A1 (en)
GB (1) GB1431780A (en)
NL (1) NL7313436A (en)
SU (1) SU505337A3 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085288A1 (en) * 1981-12-23 1983-08-10 KemaNord AB A process for the production of silicon nitride
EP0186497A2 (en) * 1984-12-28 1986-07-02 Onoda Cement Company, Ltd. Process for producing silicon nitride of high alpha content
US4929432A (en) * 1988-10-19 1990-05-29 Union Carbide Corporation Process for producing crystalline silicon nitride powder

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6256310A (en) * 1985-09-04 1987-03-12 Denki Kagaku Kogyo Kk Production of aluminum nitride
JPH0733411A (en) * 1993-07-16 1995-02-03 Shin Etsu Chem Co Ltd Production of silicon nitride powder having high alpha-silicon nitride content

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA934933A (en) * 1969-07-28 1973-10-09 Joseph Lucas (Industries) Limited Manufacture of silicon nitride powder

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0085288A1 (en) * 1981-12-23 1983-08-10 KemaNord AB A process for the production of silicon nitride
EP0186497A2 (en) * 1984-12-28 1986-07-02 Onoda Cement Company, Ltd. Process for producing silicon nitride of high alpha content
EP0186497B1 (en) * 1984-12-28 1992-02-26 Onoda Cement Company, Ltd. Process for producing silicon nitride of high alpha content
US4929432A (en) * 1988-10-19 1990-05-29 Union Carbide Corporation Process for producing crystalline silicon nitride powder

Also Published As

Publication number Publication date
BE805732A (en) 1974-02-01
JPS4994600A (en) 1974-09-07
AU6081573A (en) 1975-03-27
CH591400A5 (en) 1977-09-15
DE2350031A1 (en) 1974-04-18
NL7313436A (en) 1974-04-09
SU505337A3 (en) 1976-02-28

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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