GB1350428A - Transparent ceramic body and method for manufacturing same - Google Patents

Transparent ceramic body and method for manufacturing same

Info

Publication number
GB1350428A
GB1350428A GB3446571A GB3446571A GB1350428A GB 1350428 A GB1350428 A GB 1350428A GB 3446571 A GB3446571 A GB 3446571A GB 3446571 A GB3446571 A GB 3446571A GB 1350428 A GB1350428 A GB 1350428A
Authority
GB
United Kingdom
Prior art keywords
mixture
calcining
hrs
firing
compact
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
GB3446571A
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.)
Coors Porcelain Co
Original Assignee
Coors Porcelain Co
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 Coors Porcelain Co filed Critical Coors Porcelain Co
Publication of GB1350428A publication Critical patent/GB1350428A/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
    • C04B35/44—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
    • C04B35/443—Magnesium aluminate spinel
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/16—Oxides
    • C30B29/22—Complex oxides
    • C30B29/26—Complex oxides with formula BMe2O4, wherein B is Mg, Ni, Co, Al, Zn, or Cd and Me is Fe, Ga, Sc, Cr, Co, or Al

Landscapes

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

Abstract

1350428 Transparent MgO-Al 2 O 3 spinel COORS PORCELAIN CO 22 July 1971 [16 Sept 1970] 34465/71 Heading ClA A sintered body comprises 98% MgO-Al 2 O 3 spinel and has a transparency of at least 50% per millimetre in visible light of 0À4-0À8Á wavelength and of at least 60% per millimetre in infra-red radiation of 3À5Á wavelength. The body is manufactured by mixing MgO and Al 2 O 3 with 0À2-5% wt. LiF, the Al 2 O 3 having a particle size <À5Á, calcining the mixture at 800-1100‹ C., cold pressing the calcined material to a compact having a density of at least 2 glcc and firing the compact to sintering temperature. The magnesium oxide may be precalcined at 500‹ C. for 1-4 hrs. The mixture may be dry ball milled and formed into a compact prior to calcining. After calcining the mixture may be first crushed then about 2-5% organic lubricant, e.g. chicken fat or cottonseed oil, may be added and the mixture ball milled until the mean particle size is <0À5Á. The firing may be carried out by first heating in air to 1000-1300‹ C. for 1-5 hrs. then firing in a wet reducing atmosphere of, e.g. wet hydrogen having a dew point of 30-60‹ F., to 1600- 1900‹ C., suitably by heating at 100‹ C./hr. to 1800‹ C. and maintaining the temperature for 24 hrs.
GB3446571A 1970-09-16 1971-07-22 Transparent ceramic body and method for manufacturing same Expired GB1350428A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US7284670A 1970-09-16 1970-09-16

Publications (1)

Publication Number Publication Date
GB1350428A true GB1350428A (en) 1974-04-18

Family

ID=22110109

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3446571A Expired GB1350428A (en) 1970-09-16 1971-07-22 Transparent ceramic body and method for manufacturing same

Country Status (4)

Country Link
CA (1) CA949591A (en)
DE (1) DE2143703A1 (en)
FR (1) FR2107167A5 (en)
GB (1) GB1350428A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701701A1 (en) * 1993-02-19 1994-08-26 Daimler Benz Ag MgAl2O4 over-stoichiometric spinel, as well as method for its synthesis and use of MgAl2O4 over-stoichiometric spinel.
CN115106034A (en) * 2022-06-23 2022-09-27 之江实验室 Visual microreactor and preparation method thereof

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3840609A1 (en) * 1988-12-02 1990-06-07 Maier Kg Andreas LASER SCALPEL
CN109627005A (en) * 2018-12-20 2019-04-16 信阳师范学院 A method of calcirm-fluoride crystalline ceramics is prepared by the vacuum heating-press sintering of auxiliary agent of lithium fluoride
US20230242409A1 (en) * 2020-07-13 2023-08-03 Heraeus Conamic North America Llc Ceramic sintered body comprising magnesium aluminate spinel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2701701A1 (en) * 1993-02-19 1994-08-26 Daimler Benz Ag MgAl2O4 over-stoichiometric spinel, as well as method for its synthesis and use of MgAl2O4 over-stoichiometric spinel.
CN115106034A (en) * 2022-06-23 2022-09-27 之江实验室 Visual microreactor and preparation method thereof
CN115106034B (en) * 2022-06-23 2024-06-11 之江实验室 Visual micro-reactor and preparation method thereof

Also Published As

Publication number Publication date
CA949591A (en) 1974-06-18
DE2143703A1 (en) 1972-03-23
FR2107167A5 (en) 1972-05-05

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees