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GB1341233A - Manufacture of articles containing silicon nitride - Google Patents

Manufacture of articles containing silicon nitride

Info

Publication number
GB1341233A
GB1341233A GB1341233DA GB1341233A GB 1341233 A GB1341233 A GB 1341233A GB 1341233D A GB1341233D A GB 1341233DA GB 1341233 A GB1341233 A GB 1341233A
Authority
GB
United Kingdom
Prior art keywords
silicon nitride
repressing
manufacture
containing silicon
articles containing
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
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.)
Plessey Co Ltd
Original Assignee
Plessey Co 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 Plessey Co Ltd filed Critical Plessey Co Ltd
Publication of GB1341233A publication Critical patent/GB1341233A/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
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/64—Burning or sintering processes
    • C04B35/645—Pressure 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
    • C04B35/515—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
    • C04B35/593—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 pressure sintering

Landscapes

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

Abstract

1341233 Hot pressed silicon nitride PLESSEY CO Ltd 1 Feb 1972 [12 March 1971] 6790/71 Heading C7D A two stage process of forming an article containing Sn 3 <SP>-</SP>N 4 comprises hot pressing the powder and then repressing the compact. Repressing is preferably effected at 1650- 1850‹C at 0À5-2 t. s. i. in a graphite or nitreous carbon mould. The mould surfaces used in the initial hot pressing may be coated with a BN slurry and the contaminated surface layer of the hot pressed compact may be removed e.g. with a diamond tool prior to repressing.
GB1341233D 1971-03-12 1971-03-12 Manufacture of articles containing silicon nitride Expired GB1341233A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB679071 1971-03-12

Publications (1)

Publication Number Publication Date
GB1341233A true GB1341233A (en) 1973-12-19

Family

ID=9820810

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1341233D Expired GB1341233A (en) 1971-03-12 1971-03-12 Manufacture of articles containing silicon nitride

Country Status (1)

Country Link
GB (1) GB1341233A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094354A2 (en) * 1982-05-11 1983-11-16 Alain Mocellin Method of shaping dense polycrystalline ceramic articles
WO1990003235A1 (en) * 1988-09-30 1990-04-05 Vesuvius France S.A. Material, molding elements and method for producing them
US5333670A (en) * 1988-09-30 1994-08-02 Vesuvius Crucible Company Vitreous fused silica

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0094354A2 (en) * 1982-05-11 1983-11-16 Alain Mocellin Method of shaping dense polycrystalline ceramic articles
EP0094354A3 (en) * 1982-05-11 1985-10-02 Alain Mocellin Method of shaping dense polycrystalline ceramic articles
WO1990003235A1 (en) * 1988-09-30 1990-04-05 Vesuvius France S.A. Material, molding elements and method for producing them
FR2641218A1 (en) * 1988-09-30 1990-07-06 Vesuvius France Sa MATERIAL, MOLDING ELEMENTS AND PROCESS FOR PRODUCING THE SAME
US5333670A (en) * 1988-09-30 1994-08-02 Vesuvius Crucible Company Vitreous fused silica

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Legal Events

Date Code Title Description
428B Application now open to opposition (sect. 28/1949)
CSNS Application of which complete specification have been accepted and published, but patent is not sealed
428 Order made for sealing patent (sect. 28/1949)
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee