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Composite ceramic powder, process for production of same and solid oxide fuel cell

A composite ceramic and manufacturing method technology, applied in solid electrolyte fuel cells, cobalt compounds, nickel compounds, etc., can solve the problems of large primary particle size, uneven mixing, lack of sufficient characteristics, etc., to increase oxygen ions The effect of chemical quantity, many three-phase interfaces, and excellent composition controllability

Inactive Publication Date: 2011-05-18
SUMITOMO OSAKA CEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the composite ceramic powder obtained by the conventional method has the following problems: it is a composite powder in which the primary particles of multiple oxides are aggregated and mixed unevenly, or the primary particles of multiple oxides are aggregated separately to form a coarse composite powder. Powder etc.
[0016] Moreover, in the conventional spray pyrolysis method, the distribution uniformity of various oxides or the controllability of the composition are surely improved, but the primary particle diameter of the oxides in the obtained composite particles is large, so the There is a problem that sufficient characteristics cannot be obtained when coarse composite particles are used as catalysts or electrodes for fuel cells

Method used

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  • Composite ceramic powder, process for production of same and solid oxide fuel cell
  • Composite ceramic powder, process for production of same and solid oxide fuel cell

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Experimental program
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Embodiment approach 1

[0056] [Composite ceramic powder]

[0057] The composite ceramic powder according to Embodiment 1 of the present invention is a powder containing 1-x B x C 1-y D. y o 3 (In the formula, A is one or two elements selected from the group of La and Sm, B is one or more elements selected from the group of Sr, Ca and Ba, C is selected from Co and Oxide and zirconia represented by one or two elements in the group of Mn, D is one or two elements selected from the group of Fe and Ni, and 0.1≤x≤0.5, 0≤y≤0.3) And constitute the composite ceramic powder; 1-x B x C 1-y D. y o 3 The zirconia acidic dispersion liquid of embodiment 1 in which one or more ions in the group of A, B, C and D are added to the alkaline solution to obtain the neutralized precipitate of embodiment 1, And the powder formed by heat-treating the neutralized precipitate.

[0058] It is preferable that the dispersed average particle size of the zirconia particles in the zirconia acidic dispersion liquid accord...

Embodiment approach 2

[0102] [Composite ceramic powder]

[0103] The composite ceramic powder according to Embodiment 2 of the present invention is a composite ceramic powder composed of nickel oxide and zirconia, and is a composite ceramic powder according to Embodiment 2 containing zirconia particles composed of yttria-stabilized zirconia and nickel ions. A zirconia acidic dispersion liquid is added to an alkali solution to obtain the neutralized precipitate of Embodiment 2, and the neutralized precipitate is heat-treated to form a powder.

[0104] It is preferable that the dispersed average particle size of the zirconia particles in the zirconia acidic dispersion liquid according to Embodiment 2 is 20 nm or less.

[0105] The composite ceramic powder according to Embodiment 2 is produced by adding the zirconia acidic dispersion liquid of Embodiment 2 containing zirconia particles made of yttria-stabilized zirconia and nickel ions to an alkaline solution to produce Embodiment 2. Then, the neutra...

Embodiment 1

[0130] Lanthanum nitrate [La(NO 3 ) 3 ·6H 2 O] 62.81g, strontium nitrate [Sr(NO 3 ) 2 〕7.68g, manganese nitrate [Mn(NO 3 ) 2 ·6H 2 O) 52.04g is dissolved in 1000g of dilute nitric acid with a pH of 2.0 to make La 0.8 Sr 0.2 MnO 3 The metal salt aqueous solution of La, Sr and Mn of the composition is stirred, and the 10mol% yttria-stabilized zirconia (LSM-10YSZ) acid dispersion (pH: 2.0) containing La, Sr and Mn ions is produced (dispersion A- 1).

[0131] Then, dissolve ammonium bicarbonate (NH 4 HCO 3 ) 75.72 g to prepare ammonium bicarbonate aqueous solution (alkaline carbonic acid aqueous solution) (aqueous solution B-1).

[0132]Then, the dispersion liquid A-1 was dropped into the aqueous solution B-1 to obtain a neutralized precipitate. Here, a 25% by mass ammonia solution was dropped into the aqueous solution B-1 simultaneously with the dispersion A-1 to keep the pH of the aqueous solution B-1 at 8.

[0133] Then, the obtained neutralized precipitate was wa...

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Abstract

Provided are a composite ceramic powder which is excellent in distribution at nanometer level, controllability of composition, formation of oxide ions, and electronic conductivity; a process for the production of same, and a solid oxide fuel cell. The composite ceramic powder is a powder which contains either an oxide represented by formula: A1-xBxC1-yDyO3 or nickel oxide, and zirconia and which is produced by adding a zirconia acidic dispersion containing both yttria-stabilized zirconia particles and either ions of one or more elements selected from the group consisting of the elements defined for A, B, C and D or nickel ions to an alkali solution to form a precipitate via neutralization, and heat-treating the precipitate at 200 DEG C or above. In the formula, A is one or two elements selected from the group consisting of La and Sm; B is one or more elements selected from the group consisting of Sr, Ca and Ba; C is one or two elements selected from the group consisting of Co and Mn; D is one or two elements selected from the group consisting of Fe and Ni; 0.1 = x = 0.5 and 0 = y = 0.3.

Description

technical field [0001] The present invention relates to a composite ceramic powder, a manufacturing method thereof, and a solid oxide fuel cell (SOFC: Solid Oxide Fuel Cell), and more specifically relates to a composite ceramic powder containing zirconia particles, and perovskite oxide particles or Composite ceramic powder having nickel oxide particles and excellent particle distribution and composition controllability, method for producing the same, and a solid oxide fuel cell using the composite ceramic powder as a material for electrodes. [0002] This application claims priority based on Patent Application No. 2008-168633 filed in Japan on June 27, 2008 and Patent Application No. 2008-314958 filed in Japan on December 10, 2008, and the contents thereof are incorporated herein by reference. Background technique [0003] In the past, as a method for producing composite ceramic powders containing multiple oxides, generally, crushing or pulverizing machines such as ball mill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G51/00H01M4/86H01M8/12
CPCC04B2235/443Y02E60/521C01G45/1264Y02E60/50C01P2002/60C01G53/40C01G45/006C04B2235/3213C04B2235/3279C01G53/56C04B35/01C04B35/016C01P2002/52H01M4/8652B82Y30/00C04B35/488C01P2006/40H01M4/9016C01G45/125C01P2004/03C01G53/006C04B2235/3268C04B2235/3246H01M4/9033C04B2235/3227C01P2004/64C01P2004/04Y02E60/525C04B2235/3225Y10T428/2982
Inventor 木下畅佐藤和好阿部浩也内藤牧男
Owner SUMITOMO OSAKA CEMENT CO LTD
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