[go: up one dir, main page]

GB863247A - Strontium titanate preparation - Google Patents

Strontium titanate preparation

Info

Publication number
GB863247A
GB863247A GB32722/59A GB3272259A GB863247A GB 863247 A GB863247 A GB 863247A GB 32722/59 A GB32722/59 A GB 32722/59A GB 3272259 A GB3272259 A GB 3272259A GB 863247 A GB863247 A GB 863247A
Authority
GB
United Kingdom
Prior art keywords
boule
heating
strontium titanate
annealed
atmosphere
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
GB32722/59A
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.)
NAT LEAD CO
NL Industries Inc
Original Assignee
NAT LEAD CO
NL Industries Inc
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 NAT LEAD CO, NL Industries Inc filed Critical NAT LEAD CO
Publication of GB863247A publication Critical patent/GB863247A/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
    • C04B35/51—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on compounds of actinides
    • 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
    • C04B35/46—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 titanium oxides or titanates
    • 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
    • C04B35/48—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 zirconium or hafnium oxides, zirconates, zircon or hafnates
    • 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
    • C04B35/50—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on rare-earth compounds
    • 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)
  • Ceramic Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Inorganic Chemistry (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Metallurgy (AREA)
  • Composite Materials (AREA)
  • Inorganic Compounds Of Heavy Metals (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The transparency of annealed strontium titanate boules is enhanced by heating to 500-1000 DEG C. in a non-reactive atmosphere for example argon, helium, nitrogen or steam, or a vacuum of less than 1 mm. pressure. The initial boule may be formed by feeding powdered titanate through an oxyhydrogen flame so as to form a boule on a refractory pedestal, as described in Specification 730,665. The boule is annealed by heating in an oxidising atmosphere at 1000-1700 DEG C., and if desired subjected to a low-temperature oxidising heat treatment at 200 to 600 DEG C., before heating in the non-reactive atmosphere. The latter treatment may be for 1/2 to 8 hours.
GB32722/59A 1958-10-01 1959-09-25 Strontium titanate preparation Expired GB863247A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US863247XA 1958-10-01 1958-10-01

Publications (1)

Publication Number Publication Date
GB863247A true GB863247A (en) 1961-03-22

Family

ID=22197824

Family Applications (1)

Application Number Title Priority Date Filing Date
GB32722/59A Expired GB863247A (en) 1958-10-01 1959-09-25 Strontium titanate preparation

Country Status (1)

Country Link
GB (1) GB863247A (en)

Similar Documents

Publication Publication Date Title
GB955818A (en) Barium ceramic material and the method of making the same
ES249909A1 (en) Vapor-solid diffusion of semiconductive material
GB1014287A (en) The production of an oxide coating on a substantially monocrystalline semi-conductorbody
GB863247A (en) Strontium titanate preparation
GB932142A (en) Method of increasing annealing point of high silica glass
GB907830A (en) Method of reprocessing uo reactor fuel
GB953210A (en) An electric intermediate pressure gas discharge lamp
GB974057A (en) Improvements in and relating to spring elements
GB962228A (en) Process for the production of alkali metal borohydrides
GB1049356A (en) Method of preparing gallium arsenide
GB911235A (en) Improvements in or relating to processes for the production of a p-doped region in bodies consisting of substantially monocrystalline semi-conductor material
GB1014500A (en) Purifying semi-conductor materials
GB919373A (en) Improvements in or relating to refractory bodies
GB873438A (en) Improvements in or relating to production of graphite
GB950154A (en) Process for the production of antimony
GB925909A (en) Process for the manufacture of 1-bromo-1-chloro-2:2:2-trifluoroethane
GB886446A (en) Nuclear fuel material
JPS5217764A (en) Production method of arsenic dope silicone powder
GB1003974A (en) Improvements in or relating to methods of manufacturing objects of quartz glass
GB884348A (en) Dielectric materials and methods for their manufacture
GB911957A (en) Improvements in methods for making uranium mono carbide articles
GB858656A (en) Treatment of uranium
GB946366A (en) Growth of stannic oxide single crystals
GB1127041A (en) Production of uranium monocarbide
GB921515A (en) An improved method of treating sintered aluminium material