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CERIUM-BASED COMPOSITE OXIDE PARTICLES AND METHOD FOR PRODUCING THE SAME AND REACTION PREVENTING LAYER FOR FUEL CELL
To provide a method capable of easily producing cerium-based composite oxide particles.SOLUTION: There is provided a method for producing cerium-based composite oxide particles containing at least one element A selected from the group consisting of lanthanum, gadolinium and samarium, which comprises: (i) a step of preparing a mixture which contains particles of a compound of at least the one element A which are first particles, particles of a cerium compound which are second particles and water and does not substantially contain an organic solvent; and (ii) a step of pulverizing and mixing the first particles and second particles until the median diameter based on volume of the resulting particles is 0.12 μm or less and the specific surface area of the resulting particles is 40 m2/g or more by adding a pulverizing medium to the mixture followed by stirring, wherein the stirring is carried out under the conditions where a value Ghr obtained by multiplying the relative centrifugal acceleration (unit:×g) by the stirring time (unit: hour) satisfies 3≤Ghr≤35.SELECTED DRAWING: None
【課題】セリウム系複合酸化物粒子を簡単に製造できる方法の提供。【解決手段】ランタン、ガドリニウム、およびサマリウムからなる群より選択される少なくとも一種の元素Ａを含有するセリウム系複合酸化物粒子の製造方法であって、第１の粒子である前記少なくとも一種の元素Ａの化合物の粒子と、第２の粒子であるセリウム化合物の粒子と、水とを含む混合物であって、有機溶媒を実質的に含まない混合物を準備する工程（ｉ）と、前記混合物に粉砕媒体を添加して攪拌を行うことによって、得られる粒子の体積基準のメジアン径が０．１２μｍ以下で且つ比表面積が４０ｍ２／ｇ以上となるまで前記第１の粒子と前記第２の粒子とを粉砕混合する工程（ii）とを含み、前記攪拌は、攪拌時の相対遠心加速度（単位：×ｇ）と攪拌時間（単位：ｈｏｕｒ）とを乗じて得られる値Ｇｈｒが３≦Ｇｈｒ≦３５を満たす条件で行われる、セリウム系複合酸化物粒子の製造方法。【選択図】なし
CERIUM-BASED COMPOSITE OXIDE PARTICLES AND METHOD FOR PRODUCING THE SAME AND REACTION PREVENTING LAYER FOR FUEL CELL
To provide a method capable of easily producing cerium-based composite oxide particles.SOLUTION: There is provided a method for producing cerium-based composite oxide particles containing at least one element A selected from the group consisting of lanthanum, gadolinium and samarium, which comprises: (i) a step of preparing a mixture which contains particles of a compound of at least the one element A which are first particles, particles of a cerium compound which are second particles and water and does not substantially contain an organic solvent; and (ii) a step of pulverizing and mixing the first particles and second particles until the median diameter based on volume of the resulting particles is 0.12 μm or less and the specific surface area of the resulting particles is 40 m2/g or more by adding a pulverizing medium to the mixture followed by stirring, wherein the stirring is carried out under the conditions where a value Ghr obtained by multiplying the relative centrifugal acceleration (unit:×g) by the stirring time (unit: hour) satisfies 3≤Ghr≤35.SELECTED DRAWING: None
【課題】セリウム系複合酸化物粒子を簡単に製造できる方法の提供。【解決手段】ランタン、ガドリニウム、およびサマリウムからなる群より選択される少なくとも一種の元素Ａを含有するセリウム系複合酸化物粒子の製造方法であって、第１の粒子である前記少なくとも一種の元素Ａの化合物の粒子と、第２の粒子であるセリウム化合物の粒子と、水とを含む混合物であって、有機溶媒を実質的に含まない混合物を準備する工程（ｉ）と、前記混合物に粉砕媒体を添加して攪拌を行うことによって、得られる粒子の体積基準のメジアン径が０．１２μｍ以下で且つ比表面積が４０ｍ２／ｇ以上となるまで前記第１の粒子と前記第２の粒子とを粉砕混合する工程（ii）とを含み、前記攪拌は、攪拌時の相対遠心加速度（単位：×ｇ）と攪拌時間（単位：ｈｏｕｒ）とを乗じて得られる値Ｇｈｒが３≦Ｇｈｒ≦３５を満たす条件で行われる、セリウム系複合酸化物粒子の製造方法。【選択図】なし
CERIUM-BASED COMPOSITE OXIDE PARTICLES AND METHOD FOR PRODUCING THE SAME AND REACTION PREVENTING LAYER FOR FUEL CELL
セリウム系複合酸化物粒子およびその製造方法、ならびに燃料電池用の反応防止層
TANIGAWA HIROKI (author) / YONEDA MINORU (author)
2022-03-11
Patent
Electronic Resource
Japanese
IPC:
C01F
COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
,
Verbindungen der Metalle Beryllium, Magnesium, Aluminium, Calcium, Strontium, Barium, Radium, Thorium oder der Seltenen Erden
/
C04B
Kalk
,
LIME
/
C25B
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON- METALS
,
Elektrolytische oder elektrophoretische Verfahren für die Herstellung von Verbindungen oder von nichtmetallischen Elementen
/
H01M
Verfahren oder Mittel, z.B. Batterien, für die direkte Umwandlung von chemischer in elektrische Energie
,
PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
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