GB1282307A - Method of preparation of homogeneous oxides of two or more elements in a fineley divided form and products obtained - Google Patents
Method of preparation of homogeneous oxides of two or more elements in a fineley divided form and products obtainedInfo
- Publication number
- GB1282307A GB1282307A GB3322269A GB3322269A GB1282307A GB 1282307 A GB1282307 A GB 1282307A GB 3322269 A GB3322269 A GB 3322269A GB 3322269 A GB3322269 A GB 3322269A GB 1282307 A GB1282307 A GB 1282307A
- Authority
- GB
- United Kingdom
- Prior art keywords
- solution
- oxides
- moo
- acid
- elements
- 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
Links
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B82—NANOTECHNOLOGY
- B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
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- 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
- C01B13/18—Methods for preparing oxides or hydroxides in general by thermal decomposition of compounds, e.g. of salts or hydroxides
- C01B13/185—Preparing mixtures of oxides
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- 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
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
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- 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
- H01F1/032—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 hard-magnetic materials
- H01F1/10—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—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 hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2002/00—Crystal-structural characteristics
- C01P2002/02—Amorphous compounds
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/50—Agglomerated particles
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/62—Submicrometer sized, i.e. from 0.1-1 micrometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2004/00—Particle morphology
- C01P2004/60—Particles characterised by their size
- C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/10—Solid density
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/12—Surface area
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/60—Optical properties, e.g. expressed in CIELAB-values
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Nanotechnology (AREA)
- Structural Engineering (AREA)
- Composite Materials (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Catalysts (AREA)
- Compounds Of Iron (AREA)
Abstract
1282307 Oxidation catalysts COMMISSARIAT A L'ENERGIE ATOMIQUE INSTITUT FRANCAIS DU PETROLE DES CARBURANTS ET LIBRIFIANTS 1 July 1969 [2 July 1968 9 June 1969] 33222/69 Heading B1E [Also in Divisions C1 C2 and H1] Homogeneous oxides of two or more elements are made in a finely-divided state by (1) forming a solution containing salts of the elements to be combined and an organic complexing agent; (2) concentrating the solution in less than 30 mins to a viscosity greater than 200 centipoises at 20‹C; (3) further concentrating the viscous solution to an amorphous product and (4) thermally decomposing the precursor thus passed at temperatures above 200‹C in an atmosphere which is inert or contains O 2 in about the same proportions as in air. The complexing agent is a polybasic acid, amino-acid, keto-acid or ammonium or organic base salts thereof. Citric, glycollic, malic, tartaric, lactic and pyruric acids, and alanine are used in the Examples. The solvent may be aqueous (neutral, acidic or basic) or non-aqueous e.g. DMF, DMS n-methylpyrrolidone, nitro-compounds, alcohols, ketones or nitrites. An additional acid and/or base may be used to aid e.g. Fe 1À72 Co 0À28 (MoO 3 ) 2À7 (WO 3 ) 0 . 3 . Solid solutions: 20 mole % MoO 3 in V 2 O 5 ; 0.5In 2 O 3 -0.5Y 2 O 3 ; 10 wt% ThO 2 in Y.O,; 10 wt% ZrO 2 in Y 2 O 3 and MoO 3 , WO 3 and P 2 O 5 in V 2 O 5 . Examples describe the preparation of:- Chromites: CuCr 2 O 4 ; ZnCr 2 O 4 . Ferrites: CuFe 2 O 4 ; NiFe 2 O 4 ; CoFe 2 O 4 ; BaFe 12 O 19 ; Ni 0À8 Zn 0À2 Fe 2 O 4 ; Li 0À5 Al 0À95 Fe 1À55 O 4 ; Mn 0À6 Zn 0À4 Fe 2 O 4 . Aluminates: MgAl 2 O 4 . Zirconates and titanates: MgTi 2 O 4 ; PbTiO 3 ; BaTiO 3 PbZrO 3 ; BaZrO 3 ; Pb(Zr x Ti 1-x-y Sn y )O 3 where X=0-0.9; 1-X-Y=0.1-0.6, Y=0- 0.65; Pb 1-a M a (Zr x Ti 1-x-y Sn y )O 3 where M=Ca, Sr or Ba, a =0-0.25; also the above compounds doped with less than 0.5% MnO or .less than 0.3% IrO 2 . Manganites: CoMnO 3 . Molybdates: CoMaO 4 ; Cr-Fe molybdate (MoO 3 /Fe 2 O 3 + Cr 2 O 3 =24.7; Cr/Fe+Cr= 0.08). Pyrochlore: La 2 Sn 2 O 7 . Garnets: Y 3 Fe 5 O 12 ; Y 3 Al 5 O 12 ; Nd 0À1 Y 2À9 Fe 5 O 12 ; Gd 0À68 Y 2À32 Fe 4À58 Al 0À42 O 12 . Perooskites: YFeO 3 ; TbFeO 3 ; TmFeO 3 ; SmAlO 3 ; LaDyO 3 ; YCrO 3 ; TbAl 0À5 Co 0À5 O 3 . Mixed phases: AO-BO 3 and Fe 2 O 3 -3(BO 3 ) where A=Co, Ni or Mn and B=Mo or W The solution may also be made by mechanical trituration, using little or no solvent other than the water of crystallisation of the salts. The solution may be concentrated at atmospheric pressure or in vacuo at temperatures of -50 to 200‹C, in 2 stages or in a single stage. The single stage process may comprise spray-drying or freeze-drying, or trituration and dehydration of the resulting solution, in the same apparatus. The dehydrated precursor is a vitreous lacquer or foam, which may be in the form of flakes or spherules 10-750 microns diam. Thermal decomposition may be carried out in a fixed or fluidised bed at temperatures approaching 600‹C. Dehydration and thermal decomposition may be effected simultaneously by spray atomising the solution in a hot atmosphere. The oxides always appear as a light ash of fine particles or particle aggregates. The oxides may have specific gravity 0.01-0.5, particle size 10-10,000Š and specific surface area more than 0.1m<SP>2</SP>/g. The oxides are used as oxidation catalysts e.g. methanol to formaldehyde.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR157487 | 1968-07-02 | ||
FR6918997A FR2045612A2 (en) | 1969-06-09 | 1969-06-09 | Finely divided homogeneous mixed oxide prepn |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1282307A true GB1282307A (en) | 1972-07-19 |
Family
ID=26182093
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3322269A Expired GB1282307A (en) | 1968-07-02 | 1969-07-01 | Method of preparation of homogeneous oxides of two or more elements in a fineley divided form and products obtained |
Country Status (10)
Country | Link |
---|---|
JP (1) | JPS496040B1 (en) |
BE (1) | BE735476A (en) |
BG (1) | BG17281A3 (en) |
CA (1) | CA936676A (en) |
CH (1) | CH513769A (en) |
DE (1) | DE1933331A1 (en) |
GB (1) | GB1282307A (en) |
LU (1) | LU59000A1 (en) |
NL (1) | NL6910093A (en) |
RO (1) | RO56114A (en) |
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4231231A (en) | 1979-04-13 | 1980-11-04 | Corning Glass Works | Cryogenic ceramic and apparatus |
US4266978A (en) * | 1979-06-25 | 1981-05-12 | General Electric Company | Synthesis of mixed oxide composition |
US4285726A (en) * | 1978-04-08 | 1981-08-25 | Bayer Aktiengesellschaft | Active anti-corrosion pigments based on calcium oxide, aluminium oxide and iron oxide |
US4301020A (en) * | 1978-08-01 | 1981-11-17 | Bell Telephone Laboratories, Incorporated | Process of slurrying and spray drying ceramic oxides with polyethyleneimine dispersants |
US4330332A (en) | 1977-08-09 | 1982-05-18 | Battelle Memorial Institute | Process for the preparation of molybdenum-tungsten carbides |
US4429051A (en) | 1981-03-11 | 1984-01-31 | United Kingdom Atomic Energy Authority | Ceramic materials by sol-gel route |
GB2154248A (en) * | 1984-01-31 | 1985-09-04 | Permelec Electrode Ltd | Improvements in the manufacture of electrodes |
US4608350A (en) * | 1983-10-27 | 1986-08-26 | E. I. Du Pont De Nemours And Company | Precursor solutions for biologically active glass |
US4786555A (en) * | 1983-10-27 | 1988-11-22 | E. I. Du Pont De Nemours And Company | Support particles coated with or particles of precursors for or of biologically active glass |
EP0422105A1 (en) * | 1988-06-09 | 1991-04-17 | Battelle Memorial Institute | Metal oxide ceramic powders and methods of making same. |
FR2670770A1 (en) * | 1990-12-20 | 1992-06-26 | Bellon Labor Sa Roger | PROCESS FOR PREPARING AN OXIDE OF AT LEAST TWO DIFFERENT METALS. |
EP0990621A2 (en) * | 1998-09-30 | 2000-04-05 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Spinel powder and spinel slurry |
EP1450425A1 (en) * | 2001-11-15 | 2004-08-25 | Seimi Chemical Co., Ltd. | Composite oxide for solid oxide fuel cell and method for preparation thereof |
CN109806881A (en) * | 2017-11-20 | 2019-05-28 | 中国科学院大连化学物理研究所 | A kind of iron-molybdic catalyst and preparation method thereof for prepn. of formaldehyde by oxidation of methanol |
CN112876238A (en) * | 2021-02-25 | 2021-06-01 | 中国科学院新疆理化技术研究所 | Stannate system negative temperature coefficient thermistor material and preparation method thereof |
CN113275017A (en) * | 2021-05-28 | 2021-08-20 | 内蒙古大学 | Preparation method and application of composite pyrochlore catalyst |
CN115920889A (en) * | 2022-11-07 | 2023-04-07 | 上海交通大学 | Preparation and application of foamed spinel catalyst |
RU2815312C1 (en) * | 2023-09-06 | 2024-03-13 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский государственный университет" | Method of producing magnesium titanates |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4377424A (en) * | 1980-05-26 | 1983-03-22 | Chuetsu Metal Works Co., Ltd. | Mold of precipitation hardenable copper alloy for continuous casting mold |
JPS57116936U (en) * | 1981-12-23 | 1982-07-20 | ||
US4778671A (en) * | 1986-07-14 | 1988-10-18 | Corning Glass Works | Preparation of unagglomerated metal oxide particles with uniform particle size |
DE4217818C1 (en) * | 1992-05-29 | 1993-09-16 | H.C. Starck Gmbh & Co Kg, 3380 Goslar, De | |
JP5176084B2 (en) * | 2000-11-30 | 2013-04-03 | 中部キレスト株式会社 | Method for producing metal oxide phosphor |
FR2865576B1 (en) | 2004-01-28 | 2006-04-28 | Commissariat Energie Atomique | PROCESS FOR THE PREPARATION OF COMPOSITE MATERIALS COMPRISING AN ELECTRODE ACTIVE COMPOUND AND AN ELECTRONIC CONDUCTING COMPOUND SUCH AS CARBON PARTICULARLY FOR LITHIUM ACCUMULATORS |
US20090269585A1 (en) * | 2005-03-31 | 2009-10-29 | Mitsui Mining & Smelting Co., Ltd. | Black complex oxide particles |
EP1873118A1 (en) * | 2005-04-01 | 2008-01-02 | Mitsui Mining and Smelting Co., Ltd | Black double oxide particles, process for production thereof, black pastes, and black matrixes |
JP4839043B2 (en) * | 2005-08-30 | 2011-12-14 | 三井金属鉱業株式会社 | Composite oxide black particles, method for producing the same, black paint and black matrix |
JP5483898B2 (en) * | 2009-02-19 | 2014-05-07 | 住友金属鉱山株式会社 | Method for producing oxide phosphor |
JP7454425B2 (en) * | 2019-05-24 | 2024-03-22 | 日鉄鉱業株式会社 | Method for producing cobalt ferrite particles and cobalt ferrite particles produced thereby |
CN114149068B (en) * | 2021-11-23 | 2023-08-29 | 武汉理工大学 | High-valence iron-containing Fe (IV) perovskite type composite oxide and low-temperature roasting synthesis method and application thereof |
CN115784315B (en) * | 2022-06-24 | 2024-04-30 | 西北大学 | Oxygen carrier for efficient carbon dioxide trapping based on chemical looping combustion and preparation method and application thereof |
-
1969
- 1969-06-30 CA CA055841A patent/CA936676A/en not_active Expired
- 1969-07-01 BE BE735476D patent/BE735476A/xx unknown
- 1969-07-01 BG BG1256469A patent/BG17281A3/xx unknown
- 1969-07-01 DE DE19691933331 patent/DE1933331A1/en active Pending
- 1969-07-01 LU LU59000D patent/LU59000A1/xx unknown
- 1969-07-01 RO RO6040269A patent/RO56114A/ro unknown
- 1969-07-01 CH CH1006469A patent/CH513769A/en not_active IP Right Cessation
- 1969-07-01 GB GB3322269A patent/GB1282307A/en not_active Expired
- 1969-07-01 NL NL6910093A patent/NL6910093A/xx unknown
- 1969-07-02 JP JP44052413A patent/JPS496040B1/ja active Pending
Cited By (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4330332A (en) | 1977-08-09 | 1982-05-18 | Battelle Memorial Institute | Process for the preparation of molybdenum-tungsten carbides |
US4285726A (en) * | 1978-04-08 | 1981-08-25 | Bayer Aktiengesellschaft | Active anti-corrosion pigments based on calcium oxide, aluminium oxide and iron oxide |
US4301020A (en) * | 1978-08-01 | 1981-11-17 | Bell Telephone Laboratories, Incorporated | Process of slurrying and spray drying ceramic oxides with polyethyleneimine dispersants |
US4231231A (en) | 1979-04-13 | 1980-11-04 | Corning Glass Works | Cryogenic ceramic and apparatus |
US4266978A (en) * | 1979-06-25 | 1981-05-12 | General Electric Company | Synthesis of mixed oxide composition |
US4429051A (en) | 1981-03-11 | 1984-01-31 | United Kingdom Atomic Energy Authority | Ceramic materials by sol-gel route |
US4608350A (en) * | 1983-10-27 | 1986-08-26 | E. I. Du Pont De Nemours And Company | Precursor solutions for biologically active glass |
US4786555A (en) * | 1983-10-27 | 1988-11-22 | E. I. Du Pont De Nemours And Company | Support particles coated with or particles of precursors for or of biologically active glass |
GB2154248A (en) * | 1984-01-31 | 1985-09-04 | Permelec Electrode Ltd | Improvements in the manufacture of electrodes |
AU567789B2 (en) * | 1984-01-31 | 1987-12-03 | Permelec Electrode Ltd. | Electrode coated by organic metal complex |
EP0422105A1 (en) * | 1988-06-09 | 1991-04-17 | Battelle Memorial Institute | Metal oxide ceramic powders and methods of making same. |
EP0422105A4 (en) * | 1988-06-09 | 1992-01-08 | Battelle Memorial Institute | Metal oxide ceramic powders and thin films and methods of making same |
FR2670770A1 (en) * | 1990-12-20 | 1992-06-26 | Bellon Labor Sa Roger | PROCESS FOR PREPARING AN OXIDE OF AT LEAST TWO DIFFERENT METALS. |
WO1992011223A1 (en) * | 1990-12-20 | 1992-07-09 | Institut Français Du Petrole | Isosynthesis method in the presence of a catalyst based on an oxide of at least two different metals |
EP0990621A2 (en) * | 1998-09-30 | 2000-04-05 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Spinel powder and spinel slurry |
EP0990621A3 (en) * | 1998-09-30 | 2000-06-28 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Spinel powder and spinel slurry |
US6306360B1 (en) | 1998-09-30 | 2001-10-23 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Spinel powder and spinel slurry |
EP1450425A1 (en) * | 2001-11-15 | 2004-08-25 | Seimi Chemical Co., Ltd. | Composite oxide for solid oxide fuel cell and method for preparation thereof |
EP1450425A4 (en) * | 2001-11-15 | 2009-01-28 | Seimi Chem Kk | Composite oxide for solid oxide fuel cell and method for preparation thereof |
CN109806881A (en) * | 2017-11-20 | 2019-05-28 | 中国科学院大连化学物理研究所 | A kind of iron-molybdic catalyst and preparation method thereof for prepn. of formaldehyde by oxidation of methanol |
CN112876238A (en) * | 2021-02-25 | 2021-06-01 | 中国科学院新疆理化技术研究所 | Stannate system negative temperature coefficient thermistor material and preparation method thereof |
CN112876238B (en) * | 2021-02-25 | 2023-04-18 | 中国科学院新疆理化技术研究所 | Stannate system negative temperature coefficient thermistor material and preparation method thereof |
CN113275017A (en) * | 2021-05-28 | 2021-08-20 | 内蒙古大学 | Preparation method and application of composite pyrochlore catalyst |
CN115920889A (en) * | 2022-11-07 | 2023-04-07 | 上海交通大学 | Preparation and application of foamed spinel catalyst |
RU2815312C1 (en) * | 2023-09-06 | 2024-03-13 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский Томский государственный университет" | Method of producing magnesium titanates |
Also Published As
Publication number | Publication date |
---|---|
BE735476A (en) | 1969-12-16 |
DE1933331A1 (en) | 1970-01-29 |
JPS496040B1 (en) | 1974-02-12 |
BG17281A3 (en) | 1973-07-25 |
RO56114A (en) | 1974-04-29 |
NL6910093A (en) | 1970-01-06 |
LU59000A1 (en) | 1969-11-14 |
CH513769A (en) | 1971-10-15 |
CA936676A (en) | 1973-11-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |