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US 7,018,569 B2Granted
Complex oxide fine particles, particulate mixture, and conductive paste
AssigneeShin-Etsu Chemical Co., Ltd.
InventorYasushi Takai
Life of this patent
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Abstract
Fine particles of complex oxide represented by formula: ABO3 wherein A is at least two elements selected from among alkaline earth metal elements and rare earth elements and B is at least one metal selected from among Ti, Mn, Nb and Zr, have a BET specific surface area of 20–70 m2/g and a DSC endothermic quantity of up to 20 mcal/g. The shrinkage behavior problem of internal electrode layers during firing is solved when the complex oxide fine particles or a mixture thereof with nickel particles is used as an electrode material for the internal electrode layers.
Claims11
A particulate mixture comprising:
- nickel particles having surfaces which are at least partially coated with nickel oxide and having a particle size distribution of 0.05 to 1.0 μm and
- 5 to 30% by weight, based on the mixture, of complex oxide fine particles represented by the general formula:
- ABO3 wherein A is at least two elements selected from alkaline earth metal elements and rare earth elements and B is at least one metal selected from the group consisting of Ti, Mn, Nb and Zr, and having a BET specific surface area of 20 to 70 m2/g and a DSC endothermic quantity of up to 20 mcal/g which are uniformly admixed with the nickel particles so as to cover at least partially the nickel particle surfaces.
Dependencies are inferred from the claim text.