GB887658A - Improvements relating to the preparation of hot-pressed boron nitride - Google Patents

Improvements relating to the preparation of hot-pressed boron nitride

Info

Publication number
GB887658A
GB887658A GB607759A GB607759A GB887658A GB 887658 A GB887658 A GB 887658A GB 607759 A GB607759 A GB 607759A GB 607759 A GB607759 A GB 607759A GB 887658 A GB887658 A GB 887658A
Authority
GB
United Kingdom
Prior art keywords
aluminium
mixture
added
hot
boron 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
GB607759A
Inventor
Paul Popper
Thomas Alan Ingles
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.)
British Ceramic Research Association Ltd
Original Assignee
British Ceramic Research Association 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 British Ceramic Research Association Ltd filed Critical British Ceramic Research Association Ltd
Priority to GB607759A priority Critical patent/GB887658A/en
Publication of GB887658A publication Critical patent/GB887658A/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
    • C04B35/583—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 boron nitride
    • 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
    • C01B21/064—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 boron

Landscapes

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

Abstract

Up to 5% by weight aluminium is added to boron nitride powder and the mixture is hot pressed. The aluminium may be added as aluminium powder, aluminium nitride, or as a mixture of aluminium nitride and boric oxide. The hot pressing is effected at 1750 DEG C. and 600 p.s.i. or at 1800 DEG C. and 520 p.s.i. According to the Provisional Specification the aluminium may also be added as a mixture of calcium carbonate and alumina.ALSO:Up to 5% aluminium is added to boron nitride powder and the mixture is hot pressed. The aluminium is added as aluminium powder, aluminium nitride, or as a mixture of boric oxide and aluminium nitride. Hot pressing is effected at 1750 DEG C. and 600 p.s.i. or at 1800 DEG C. and 520 p.s.i. According to the Provisional Specification the aluminium may also be added as a mixture of calcium carbonate and alumina.
GB607759A 1959-02-23 1959-02-23 Improvements relating to the preparation of hot-pressed boron nitride Expired GB887658A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB607759A GB887658A (en) 1959-02-23 1959-02-23 Improvements relating to the preparation of hot-pressed boron nitride

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB607759A GB887658A (en) 1959-02-23 1959-02-23 Improvements relating to the preparation of hot-pressed boron nitride

Publications (1)

Publication Number Publication Date
GB887658A true GB887658A (en) 1962-01-24

Family

ID=9807968

Family Applications (1)

Application Number Title Priority Date Filing Date
GB607759A Expired GB887658A (en) 1959-02-23 1959-02-23 Improvements relating to the preparation of hot-pressed boron nitride

Country Status (1)

Country Link
GB (1) GB887658A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353954A (en) * 1959-06-30 1967-11-21 Commw Scient Ind Res Org Method of producing compacts by reacting particulate ingredients
FR2193796A1 (en) * 1972-07-25 1974-02-22 Kempten Elektroschmelz Gmbh
FR2196301A1 (en) * 1972-08-18 1974-03-15 Kempten Elektroschmelz Gmbh
CH677488A5 (en) * 1989-02-14 1991-05-31 Htm Ag

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3353954A (en) * 1959-06-30 1967-11-21 Commw Scient Ind Res Org Method of producing compacts by reacting particulate ingredients
FR2193796A1 (en) * 1972-07-25 1974-02-22 Kempten Elektroschmelz Gmbh
FR2196301A1 (en) * 1972-08-18 1974-03-15 Kempten Elektroschmelz Gmbh
CH677488A5 (en) * 1989-02-14 1991-05-31 Htm Ag

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