Dowa Electronics Materials Co., Ltd.

Yuki Kaneshiro

Akira Nagatomi

Shinichi Suenaga

Masahiro Yoshida

Kenichi Inoue

Yoshiyuki Michiaki

Atsushi Ebara

Hidefumi Fujita

Kozo Ogi

Takuya Yano

Kyoso Masuda

Akihiro Asano

Minoru Kishida

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.

Silver-coated alloy powder, electrically conductive paste, electronic part, and electric device

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.

Copper powder for conductive paste and method for producing same

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 (Ddiameter) of not greater than 0.8 micrometers when it is calculated by a laser diffraction particle size analysis, the cuprous oxide powder containing 30 ppm or more of iron.

Cuprous oxide powder and method for producing same

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&#x2212;x&#x2212;y):x:y, satisfying 0&#x3c;x&#x2266;0.4, and 0&#x3c;y&#x2266;0.4. This composite oxide is suitable as a PM combustion catalyst, and is hardly subjected to poisoning due to sulfur oxide.

Composite oxide for exhaust gas purifying catalyst and exhaust gas purifying catalyst, and diesel exhaust gas purifying filter

A composite oxide for exhaust gas purification catalysts, which comprises Ce, Bi, R and oxygen and satisfies 0&#x3c;x&#x2266;0.4 and 0&#x3c;y&#x3c;1.0 when the molar ratio of Ce, Bi and R of the oxide is represented as (1&#x2212;x&#x2212;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.

Growing community of inventors

Okayama, Japan

Yuki Kaneshiro