Abstract: 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.

Abstract: A zirconia powder in which when a stabilizer is Y2O3, a content thereof is 1.4 mol % or more and less than 2.0 mol %; when the stabilizer is Er2O3, a content thereof is 1.4 mol % or more and 1.8 mol % or less; when the stabilizer is Yb2O3, a content thereof is 1.4 mol % or more and 1.8 mol % or less; and when the stabilizer is CaO, a content thereof is 3.5 mol % or more and 4.5 mol % or less; and in a range of 10 nm or more and 200 nm or less in a pore distribution, a peak top diameter of a pore volume distribution is 20 nm or more and 120 nm or less, a pore volume is 0.2 ml/g or more and less than 0.5 ml/g, and a pore distribution width is 30 nm or more and 170 nm or less.

Abstract: A zirconia powder containing a stabilizer, and having a specific surface area of 20 m2/g or more and 60 m2/g or less and a particle diameter D50 of 0.1 ?m or more and 0.7 ?m or less, in which in a range of 10 nm or more and 200 nm or less in a pore distribution based on a mercury intrusion method, a peak top diameter in a pore volume distribution is 20 nm or more and 85 nm or less, a pore volume is 0.2 ml/g or more and less than 0.5 ml/g, and a pore distribution width is 40 nm or more and 105 nm or less.

Abstract: 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/cm2, wherein the relative molding density is represented by the following formula (1): relative molding density (%)=(molding density/theoretical sintered density)×100??(1).

Abstract: 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/cm2, wherein the relative molding density is represented by the following formula (1): relative molding density (%)=(molding density/theoretical sintered density)×100 ??(1).

Abstract: 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.

Abstract: 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.

Abstract: Accurate yet cost-effective measurement methods and systems determine eccentricity at a particular location of the aspherical lens surface. Since an aspherical lens generally has varying degrees of curvature along the aspherical surface, the eccentricity at the selected location on the aspherical lens surface provides precise information in determining the quality of a certain type of an aspherical lens component. Furthermore, these improved methods and systems according to the current invention are applicable to measure eccentricity of a selected aspherical lens surface in a complex lens assembly containing a plurality of aspherical lens components.