Daiichi Kigenso Kagaku Kogyo Co., Ltd.

Masayuki Takai

Yasushi Nakajima

Keita Kanenishi

Provided is a stabilized zirconia sintered body which comprises a fluorescent agent containing zirconium and titanium, and shows fluorescence when irradiated with light including light of a wavelength of 250 nm to 380 nm.

Stabilized zirconia sintered body and zirconia powder

Provided is a zirconia powder that has excellent moldability and a high sintered density, and that can produce a zirconia sintered product in a simple manner; also provided is a method for producing the zirconia powder. The zirconia powder according to the present invention comprises 2 to 6 mol % of yttria, has a volume of pores with a pore diameter of 200 nm or less of 0.14 to 0.28 mL/g, and has a relative molding density of 44 to 55% when the zirconia powder is molded at a molding pressure of 1 t/cm, wherein the relative molding density is represented by the following formula (1):relative molding density (%)=(molding density/theoretical sintered density)&#xd7;100&#x2003;&#x2003;(1).

Zirconia fine powder and production method therefor

The object of the present invention is to provide an oxide-based phosphor comprising elements other than rare earth elements as light-emitting elements, with low material costs, while achieving high luminous efficacy. The means for achieving the object is a phosphor comprising the following (1) to (3): (1) zirconium oxide, (2) titanium, and (3) at least one element selected from the group consisting of phosphorus, selenium, boron, and silicon.

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Osaka, Japan

Masayuki Takai