Abstract: In a carrier core material according to the present invention, the volume moment mean D [4, 3] of O. Bluntness measured with an injection type image analysis particle size distribution meter is equal to or greater than 65% and equal to or less than 80%, and the volume moment mean D [4, 3] of ISO Roundness is equal to or greater than 80% and equal to or less than 86%. In this way, it is possible to suppress development memory and carrier adherence.

Abstract: An object of the present invention is to provide metal powder that can be used to form an external electrode, which is excellent in solder wettability and solder leach resistance while having a layer structure with fewer layers than in the related art and, furthermore, is excellent in electrical conductivity. This silver-coated alloy powder comprises a coating layer on a surface of an alloy core particle containing copper, nickel, zinc, and inevitable impurities, the coating layer containing silver.

Abstract: An object of the present invention is to provide metal powder that can be used to form an external electrode, which is excellent in solder wettability and solder leach resistance while having a layer structure with fewer layers than in the related art and, furthermore, is excellent in electrical conductivity. This silver-coated alloy powder comprises a coating layer on a surface of an alloy core particle containing copper, nickel, zinc, and inevitable impurities, the coating layer containing silver.

Abstract: There are provided a copper powder for conductive paste, which comprises monodisperse and spherical fine copper particles having a sharp particle size distribution and containing no coarse particles and which can form a thinner electrode film while avoiding a bad influence on electric characteristics thereof, and a method for stably producing such a copper powder for conductive paste. After copper is complexed by adding a complexing agent to an aqueous solution containing copper while blowing air into the solution, the blowing of air is stopped, and then, a reducing agent is added to the solution to deposit copper particles by reduction.

Abstract: There are provided a cuprous oxide powder having a smaller particle diameter than that of conventional cuprous oxide powders, and a method for producing the cuprous oxide powder by a chemical reducing process. In a method for producing a cuprous oxide powder by adding a reducing agent, such as a reducing sugar, to a solution containing copper hydroxide, which is formed by adding one of an alkali solution and a copper ion containing solution to the other thereof, to deposit cuprous oxide particles by reduction, 0.00001 to 0.04 moles (10 to 40000 ppm) of ferrous ions with respect to the amount of copper ions in the copper ion containing solution are added to the copper ion containing solution before forming copper hydroxide, to produce a cuprous oxide powder which has a mean primary particle diameter of not greater than 0.5 micrometers when it is measured by a scanning electron microscope (SEM), the cuprous oxide powder having a 50% particle diameter (D50 diameter) of not greater than 0.

Abstract: There are provided a cuprous oxide powder having a smaller particle diameter than that of conventional cuprous oxide powders, and a method for producing the cuprous oxide powder by a chemical reducing process. In a method for producing a cuprous oxide powder by adding a reducing agent, such as a reducing sugar, to a solution containing copper hydroxide, which is formed by adding one of an alkali solution and a copper ion containing solution to the other thereof, to deposit cuprous oxide particles by reduction, 0.00001 to 0.04 moles (10 to 40000 ppm) of ferrous ions with respect to the amount of copper ions in the copper ion containing solution are added to the copper ion containing solution before forming copper hydroxide, to produce a cuprous oxide powder which has a mean primary particle diameter of not greater than 0.5 micrometers when it is measured by a scanning electron microscope (SEM), the cuprous oxide powder having a 50% particle diameter (D50 diameter) of not greater than 0.

Abstract: To provide an oxidation catalyst capable of burning PM of diesel engine exhausts gas at a low temperature, and hardly subjected to poisoning due to sulfur oxide. A composite oxide contains Ce, Bi, and M (wherein M is one or more elements selected from Mg, Ca, Sr, and Ba) and oxygen, and is manufactured, with a molar ratio of Ce, Bi, M expressed by Ce:Bi:M=(1?x?y):x:y, satisfying 0<x?0.4, and 0<y?0.4. This composite oxide is suitable as a PM combustion catalyst, and is hardly subjected to poisoning due to sulfur oxide.

Abstract: There are provided a copper powder for conductive paste, which comprises monodisperse and spherical fine copper particles having a sharp particle size distribution and containing no coarse particles and which can form a thinner electrode film while avoiding a bad influence on electric characteristics thereof, and a method for stably producing such a copper powder for conductive paste. After copper is complexed by adding a complexing agent to an aqueous solution containing copper while blowing air into the solution, the blowing of air is stopped, and then, a reducing agent is added to the solution to deposit copper particles by reduction.

Abstract: A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R and oxygen and satisfies 0<x?0.4 and 0<y<1.0 when the molar ratio of Ce, Bi and R of the oxide is represented as (1?x?y), x and Y respectively. The composite oxide has an X-ray diffraction peak corresponding to that of a fluorite structure. In the composite oxide, R contains one or two of Pr and Tb. The exhaust gas purification catalyst is favorable for a PM combustion catalyst.

Abstract: A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R and oxygen and satisfies 0<x?0.4 and 0<y<1.0 when the molar ratio of Ce, Bi and R of the oxide is represented as (1?x?y), x and Y respectively. The composite oxide has an X-ray diffraction peak corresponding to that of a fluorite structure. In the composite oxide, R contains one or two of Pr and Tb. The exhaust gas purification catalyst is favorable for a PM combustion catalyst.

Abstract: To provide an oxidation catalyst capable of burning PM of diesel, engine exhausts gas at a low temperature, and hardly subjected to poisoning due to sulfur oxide. A composite oxide contains Ce, Bi, and M (wherein M is one or more elements selected from Mg, Ca, Sr, and Ba) and oxygen, and is manufactured, with a molar ratio of Ce, Bi, M expressed by Ce:Bi:M=(1?x?y):x:y, satisfying 0<x?0.4, and 0<y?0.4. This composite oxide is suitable as a PM combustion catalyst, and is hardly subjected to poisoning due to sulfur oxide.