Abstract: A complex oxide powder contains cerium and aluminum, and has a specific surface area of 0.5 m2/g or more and 10 m2/g or less.

Abstract: A complex oxide powder contains cerium, zirconium, and aluminum and, has a specific surface area of 0.5 m2/g or more and 10 m2/g or less.

Abstract: In order to provide a zirconium boride that provides high caloric value at the time of its combustion with a compound having radicals such as perchlorate and can combust in a short period of time, while providing high physical stability, an amount of radical derived from lattice defect detected by ESR spectroscopy, is set to 0.1×1015 spin/mg or more.

Abstract: In order to provide a zirconium boride that provides high caloric value at the time of its combustion with a compound having radicals such as perchlorate and can combust in a short period of time, while providing high physical stability, an amount of radical derived from lattice defect detected by ESR spectroscopy, is set to 0.1×1015 spin/mg or more.

Abstract: The present invention provides a method for producing an ingot of zirconium carbide at a low cost in an efficient manner. The present invention, specifically, provides a method for producing an ingot of zirconium carbide, characterized in that the ingot produced has a size of 50 mm or more, a density of 5.7 g/cm3 or more, and a Vickers hardness of 1,500 or more, and that the method includes the steps of: (1) Step 1 of mixing zirconium oxide with carbon to obtain a mixture thereof, wherein the carbon is present in an amount of 15 to 20% by mass based on the zirconium oxide in the mixture; (2) Step 2 of forming the mixture into granules; (3) Step 3 of melting the granules using argon plasma; and (4) Step 4 of slowly cooling the melt to obtain the ingot of zirconium carbide.

Abstract: 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.

Abstract: 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.