Composite ceramic powder, method for manufacturing the powder, electrode for solid electrolytic fuel cell, and method for manufacturing the electrode
AssigneeJapan Fine Ceramics Center
InventorsSatoshi Ohara, Takehisa Fukui, Kaseki Kodera
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Abstract
An object of the present invention is to provide composite ceramic powder containing composite ceramic particulates as constituent particulates. Each of the composite ceramic particulates is constituted of a group of first particles and a group of second particles in which the first particles are localized around the second particles. A spray pyrolysis is used to localize the first particles around the second particles, thereby producing such composite ceramic particulates.
Claims17
Composite ceramic powder comprising composite ceramic particulates as constituent particulates, each of said composite ceramic particulates being constituted of a group of first particles and a group of second particles in which said first particles are localized around said second particles.
A method of manufacturing an electrode of a solid oxide fuel cell, comprising the steps of:
- sintering composite ceramic powder containing composite ceramic particulates, each of the composite ceramic particulates being constituted of particles made of precursor materials of conductive materials for the electrode and particles made of precursor materials of carrier materials which may act as a carrier for the conductive materials in the electrode, in which the latter particles are localized around the former particles.
An electrode comprising nickel particles surrounded and separately supported by yttria stabilized zirconia particles, in a nickel:yttria stabilized zirconia molar ratio between 90:10 and 50:50.
A method of manufacturing a composite ceramic powder comprising the steps of:
- atomizing a liquid comprising a first particle raw material and a second particle raw material to form a mist, the first particle raw material and the second particle raw material each having a known thermal decomposition temperature;
- drying the mist at a temperature below the thermal decomposition temperature of both of the raw materials, to form particulates in which the first particle raw material is disposed around the second particle raw material;
- and
- thermally decomposing the first particle raw material and the second particle raw material in the particulates.
Composite ceramic powder comprising composite ceramic particulates, each of said composite ceramic particulates comprising a group of first particles and a group of second particles in which said second particles form a core having a surface and said first particles are disposed at least partially covering the surface of said core.
A method of manufacturing an electrode of a solid oxide fuel cell, comprising the steps of:
- sintering composite ceramic powder containing composite ceramic particulates, each of the composite ceramic particulates comprising particles made of a precursor of a conductive material for the electrode and particles made of a precursor of a carrier material for the conductive material in the electrode, in which the carrier material precursor particles are disposed around the conductive material precursor particles.
Dependencies are inferred from the claim text.