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Patent
Daiichi Kigenso Kagaku Kogyo Co. | Date: 2011-02-25

The present invention provides a cerium oxide-zirconium oxide based composite oxide that has a large OSC at a low temperature and that has a suitable OSC, and a method for readily producing the composite oxide. Specifically, the present invention provides a cerium oxide-zirconium oxide based composite oxide comprising a mixture of (1) a cerium-zirconium composite oxide from a melting process and (2) cerium dioxide from a wet process, and a method for producing a cerium oxide-zirconium oxide based composite oxide, the method comprising dispersing a cerium-zirconium composite oxide from a melting process in a cerium-containing solution, neutralizing the resulting dispersion; and then performing a heat treatment.


Patent
Denso Corporation and Daiichi Kigenso Kagaku Kogyo Co. | Date: 2012-03-29

Disclosed is a spinel powder obtained by mixing a magnesia raw-material with an electrically fused alumina, followed by firing of the mixture. The particles of the spinel powder are coated with granular spinel particles. Therefore, there are provided a spinel powder and a simple method for producing the same, which is superior in thermal spraying property and has a unique particle shape. In particular, there is provided a method for producing a spinel powder which contributes to a reduction in the variation of characteristics of sensors, for example, as a thermal spraying powder for forming a protective coating of a gas sensor element.


Disclosed is an inorganic material that can exhibit an excellent photocatalytic gas decomposition function while maintaining an abrasion resistance on a level that is usually required of this type of inorganic materials. The inorganic material includes an inorganic material base and a photocatalyst layer that is formed by firing and is provided on the surface of the inorganic material base, the photocatalyst layer containing: photocatalyst particles; zirconia particles having a BET specific surface area of not less than 10 m


Patent
Daiichi Kigenso Kagaku Kogyo Co. and Toyota Jidosha Kabushiki Kaisha | Date: 2014-04-07

An exhaust gas purifying catalyst of the present invention includes: a first metal oxide selected from the group of praseodymium oxide, terbium oxide, and a combination thereof; a second metal oxide that is neodymium oxide; a third metal oxide that is zirconia or a combination of zirconia and ceria; and a fourth metal oxide selected from the group of lanthanum oxide, yttrium oxide, barium oxide, calcium oxide, strontium oxide, silicon oxide and a combination thereof.


Patent
Daiichi Kigenso Kagaku Kogyo Co. | Date: 2012-07-06

The present invention provides a flux for brazing aluminum-based materials, the flux being capable of brazing an A5052 alloy or the like containing 1.5 wt % or more of magnesium even when an AlSi eutectic alloy (Si content: 7 to 12 wt %; A4343 alloy, A4047 alloy; melt starting temperature: about 577 to 615 C.) is used as a brazing material. Specifically, the present invention provides a flux for brazing aluminum-based materials, comprising, expressed in mol %, 20 mol %CsF49 mol %, 1 mol %LiF58 mol %, 19 mol %AlF

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