GB1295434A - - Google Patents

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Publication number
GB1295434A
GB1295434A GB1295434DA GB1295434A GB 1295434 A GB1295434 A GB 1295434A GB 1295434D A GB1295434D A GB 1295434DA GB 1295434 A GB1295434 A GB 1295434A
Authority
GB
United Kingdom
Prior art keywords
metal
mixed oxide
aqueous
nitrate solution
sol
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
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 filed Critical
Publication of GB1295434A publication Critical patent/GB1295434A/en
Expired legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
    • H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
    • H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
    • H01F1/12—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials
    • H01F1/34—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites
    • H01F1/36—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of soft-magnetic materials non-metallic substances, e.g. ferrites in the form of particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F9/00—Making metallic powder or suspensions thereof
    • B22F9/16—Making metallic powder or suspensions thereof using chemical processes
    • B22F9/18—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds
    • B22F9/20—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds
    • B22F9/22—Making metallic powder or suspensions thereof using chemical processes with reduction of metal compounds starting from solid metal compounds using gaseous reductors
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
    • C01B13/14—Methods for preparing oxides or hydroxides in general
    • C01B13/34—Methods for preparing oxides or hydroxides in general by oxidation or hydrolysis of sprayed or atomised solutions
    • 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
    • C04B33/00—Clay-wares
    • C04B33/28—Slip casting
    • 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
    • C04B33/00—Clay-wares
    • C04B33/30—Drying methods
    • 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
    • C04B35/26—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 ferrites
    • C04B35/265—Compositions containing one or more ferrites of the group comprising manganese or zinc and one or more ferrites of the group comprising nickel, copper or cobalt
    • 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
    • C04B35/26—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 ferrites
    • C04B35/2683—Other ferrites containing alkaline earth metals or lead

Abstract

1295434 Mixed oxides UNITED KINGDOM ATOMIC ENERGY AUTHORITY 17 Nov 1969 [25 Nov 1968] 55908/68 Heading C1A Mixed oxides are made by mixing an aqueous silica or metal compound sol with either an aqueous sol of a second metal compound or an aqueous solution containing cations of the second metal, and spraying the mixture as droplets into a vessel containing gas at such elevated temperature that reaction to form a partly or fully-reacted mixed oxide occurs, and then separating out a powder of such mixed oxide. Mixed oxide is defined as a single phase mixed oxide compound or solid solution containing two or more metal cations or silicon and at least one metal cation, but excluding more physical admixtures. An aqueous solor solution of a third metal may be incorporated in the starting mixture. The droplets (e.g. 10 microns) may be sprayed countercurrent to, or cocurrent with, a flow of gas e.g. air, nitrogen, argon, hydrogen or ammonia heated to 700- 1000‹C. directly or by radiation from the walls of the reaction vessel. Reaction takes place in gaseous suspension to form a hydrous oxide gel, which is then dehydrated to a ceramic gel e.g. 1-5 microns diameter. The particles may be powdered, shaped into green artifacts and sintered, or alternatively reduced to a metal alloy powder, The reaction vessel may be a vertical heated silica or alumina tube. Examples describe the preparations of (1) lead zirconatetitanate from titanium hydroxide sol, zirconium hydroxide sol and lead nitrate solution; (2) CaMgSiO 4 and Ca 3 MgSi 2 O 8 from calcium nitrate solution, magnesium nitrate solution and silica aquasol; (3) calcium magnesium silicate; and (4) tungsten-cobalt alloy (including hexagonal WCo 3 ) by reducing, in hydrogen at 1000‹C, a mixed oxide made from cobalt nitrate solution and tungstic oxide aquasol.
GB1295434D 1968-11-25 1968-11-25 Expired GB1295434A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5590868 1968-11-25

Publications (1)

Publication Number Publication Date
GB1295434A true GB1295434A (en) 1972-11-08

Family

ID=10475193

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1295434D Expired GB1295434A (en) 1968-11-25 1968-11-25

Country Status (4)

Country Link
DE (1) DE1958787A1 (en)
FR (1) FR2024178A1 (en)
GB (1) GB1295434A (en)
NL (1) NL6917605A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196621A (en) * 1986-10-23 1988-05-05 Plessey Co Plc Particulate oxide materials
AU625532B2 (en) * 1987-10-05 1992-07-16 Merck Patent Gesellschaft Mit Beschrankter Haftung Process for the preparation of metal oxide powders

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO782368L (en) * 1977-07-18 1979-01-19 Kajaani Oy PROCEDURE FOR THE PREPARATION OF SODIUM METAL OXYDE
DE2964645D1 (en) * 1978-11-18 1983-03-03 Dornier System Gmbh Process for the manufacture of hard-magnetic ferrite powder
DE2853931A1 (en) * 1978-12-14 1980-06-19 Dornier System Gmbh METHOD FOR PRODUCING METALLIC POWDER
EP0285339A1 (en) * 1987-04-01 1988-10-05 Corning Glass Works Metal oxide and metal sulfide particles and production thereof
EP0291667A3 (en) * 1987-05-15 1990-03-28 Dornier Gmbh Composite powder from metallic or ceramic whiskers
FR2628415A1 (en) * 1988-03-09 1989-09-15 Rhone Poulenc Chimie PROCESS FOR MANUFACTURING SUPERCONDUCTING MATERIALS AND PRODUCTS THUS OBTAINED
AT391848B (en) * 1988-06-22 1990-12-10 Andritz Ag Maschf METHOD AND DEVICE FOR PRODUCING METAL OXIDS
DE19837548A1 (en) * 1998-08-19 2000-03-09 Aventis Res & Tech Gmbh & Co Low carbon and hydrogen content oxide powder for high temperature superconductor wire, strip, rod, tube or hollow or solid body manufacture
DE10223746A1 (en) * 2002-05-28 2003-12-18 Honeywell Specialty Chemicals Process for the production of mixed oxides containing lanthanum, strontium and manganese for electrodes in fuel cells

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2196621A (en) * 1986-10-23 1988-05-05 Plessey Co Plc Particulate oxide materials
AU625532B2 (en) * 1987-10-05 1992-07-16 Merck Patent Gesellschaft Mit Beschrankter Haftung Process for the preparation of metal oxide powders

Also Published As

Publication number Publication date
FR2024178A1 (en) 1970-08-28
DE1958787A1 (en) 1970-07-09
NL6917605A (en) 1970-05-27

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee