GB728547A - Refractory materials and the use and production thereof - Google Patents

Refractory materials and the use and production thereof

Info

Publication number
GB728547A
GB728547A GB7648/53A GB764853A GB728547A GB 728547 A GB728547 A GB 728547A GB 7648/53 A GB7648/53 A GB 7648/53A GB 764853 A GB764853 A GB 764853A GB 728547 A GB728547 A GB 728547A
Authority
GB
United Kingdom
Prior art keywords
oxide
chromium
oxidizing atmosphere
mixture
cr2o3
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
GB7648/53A
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.)
ELEKTROMETALLURGIE GmbH
Original Assignee
ELEKTROMETALLURGIE GmbH
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 ELEKTROMETALLURGIE GmbH filed Critical ELEKTROMETALLURGIE GmbH
Publication of GB728547A publication Critical patent/GB728547A/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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/42—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromites
    • 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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • 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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/12—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on chromium oxide
    • 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
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/44—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminates

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

An oxide of the formula CrO.Cr2O3 is prepared by heating, at above 1,700 DEG C. in an oxidizing atmosphere, a mixture of chromium and chromic oxide in the presence of not more than 5 per cent. of a flux of alkali or alkaline earth metal salt, which may itself supply the oxidizing atmosphere, e.g. a nitrate, chromate or chlorate. The chromium starting material may contain carbon which is burned out, leaving a porous product.ALSO:A sintered refractory material consists essentially of the oxide CrO. Cr2O3 alone or admixed with an oxide of iron. It is prepared by heating at above 1700 DEG C. in an oxidizing atmosphere a mixture of either crushed chromium and chromic oxide, or a mixture of ferrochrome and chromite, in the presence of not more than 5 per cent of a flux of an alkali metal or alkaline earth metal salt. The salt can itself provide the required oxidizing atmosphere, e.g. a nitrate, chromate or chlorate. The chromium or ferrochrome can contain carbon which is oxidized leaving a porous product. Binders for mouldability, e.g. tar, silicic acid and limes may also be present.
GB7648/53A 1952-03-20 1953-03-19 Refractory materials and the use and production thereof Expired GB728547A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE728547X 1952-03-20

Publications (1)

Publication Number Publication Date
GB728547A true GB728547A (en) 1955-04-20

Family

ID=6635730

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7648/53A Expired GB728547A (en) 1952-03-20 1953-03-19 Refractory materials and the use and production thereof

Country Status (1)

Country Link
GB (1) GB728547A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103221B (en) * 1957-12-11 1961-03-23 Max Planck Inst Eisenforschung Process for the production of refractory, high temperature change and slag resistance exhibiting molded parts made of chromium oxide

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1103221B (en) * 1957-12-11 1961-03-23 Max Planck Inst Eisenforschung Process for the production of refractory, high temperature change and slag resistance exhibiting molded parts made of chromium oxide

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