Abstract: An oxynitride phosphor powder has a fluorescence peak wavelength of 587 to 630 nm and a high external quantum efficiency. A method of producing the oxynitride phosphor powder containing Li at 50 to 10,000 ppm includes mixing silicon nitride powder, a substance serving as an aluminum source, a substance serving as a calcium source and a substance serving as an europium source; firing the mixture at 1500 to 2000° C. in an inert gas atmosphere or a reducing gas atmosphere to obtain a fired oxynitride phosphor composed mainly of Ca-containing ?-SiAlON, as an intermediate; and heat treating the fired oxynitride phosphor at a temperature of 1450° C. to less than the firing temperature, in an inert gas atmosphere or in a reducing gas atmosphere in the presence of Li.

Abstract: An (oxy)nitride phosphor powder has a fluorescence peak wavelength of 610 to 625 nm and also has higher external quantum efficiency than the conventional one. The (oxy)nitride phosphor powder includes an ?-type SiAlON and aluminum nitride, represented by the compositional formula: Cax1Eux2Si12?(y+z)Al(y+z)OzN16?z wherein x1, x2, y, z fulfill the following formulae: 1.60?x1+x2?2.90, 0.18?x2/x1?0.70, 4.0?y?6.5, 0.0?z?1.0. The powder can additionally contain Li in an amount of 50 to 10000 ppm. The content of the aluminum nitride may be more than 0 mass % to less than 33 mass %.

Abstract: An oxynitride phosphor powder is an ?-SiAlON phosphor having a dominant wavelength of 565-577 nm and fluorescence intensity and external quantum efficiency that are high enough for practical use. The oxynitride phosphor powder comprises an ?-SiAlON represented by the compositional formula: Cax1Eux2Ybx3Si12?(y+z)Al(y+z)OzN16?z (wherein 0.0<x1?2.0, 0.0000<x2?0.0100, 0.0000<x3?0.0100, 0.4?x2/x3?1.4, 1.0?y?4.0, 0.5?z?2.0).

Abstract: An oxynitride phosphor powder contains ?-SiAlON and aluminum nitride, obtained by mixing a silicon source, an aluminum source, a calcium source, and a europium source to produce a composition represented by a compositional formula: Cax1Eux2Si12?(y+z)Al(y+z)OzN16?z (wherein x1, x2, y and z are 0<x1?3.40, 0.05?x2?0.20, 4.0?y?7.0, and 0?z?1), and firing the mixture.

Abstract: A method of manufacturing a wavelength conversion member including a polycrystalline ceramics includes mixing a substance serving as a silicon source, a substance serving as an aluminum source, a substance serving as a calcium source, and a substance serving as a europium source; firing the obtained mixture to obtain an oxynitride phosphor powder; then sintering the oxynitride phosphor powder in an inert atmosphere to obtain the polycrystalline ceramics, characterized in that the sintered oxynitride phosphor powder has a composition (excluding oxygen) represented by the Formula: Cax1Eux2Si12-(y+z)Al(y+z)OzN16-z (in the Formula, x1, x2, y, and z are values such that 0<x1?3.40, 0.05?x2?0.20, 3.5?y?7.0, 0?z?1).

Abstract: An oxynitride phosphor powder has a fluorescence peak wavelength of 587 to 630 nm and a high external quantum efficiency. A method of producing the oxynitride phosphor powder containing Li at 50 to 10,000 ppm includes mixing silicon nitride powder, a substance serving as an aluminum source, a substance serving as a calcium source and a substance serving as an europium source; firing the mixture at 1500 to 2000° C. in an inert gas atmosphere or a reducing gas atmosphere to obtain a fired oxynitride phosphor composed mainly of Ca-containing ?-SiAlON, as an intermediate; and heat treating the fired oxynitride phosphor at a temperature of 1450° C. to less than the firing temperature, in an inert gas atmosphere or in a reducing gas atmosphere in the presence of Li.

Abstract: An oxynitride phosphor powder includes an ?-sialon fluorescent body having a fluorescent peak wavelength of 605-615 nm, and the external quantum efficiency of the oxynitride phosphor powder is greater than the conventional art. The oxynitride phosphor powder includes an ?-sialon represented by the formula Cax1Eux2Si12-(y+z)Al(y+z)OzN16-z (where x1, x2, y, and z satisfy the expressions 1.10?x1+x2?1.70, 0.18?x2/x1?0.47, and 2.6?y?3.6, 0.0?z?1.0).

Abstract: An oxynitride phosphor power has a fluorescence peak wavelength of 580 to 605 nm, the oxynitride phosphor having a higher external quantum efficiency than ever before. The oxynitride phosphor powder is an oxynitride phosphor powder containing ?-SiAlON and aluminum nitride, represented by composition formula: Cax1Eux2Si12?(y+z)Al(y+z)OzN16?z wherein x1, x2, y and z are 0<x1?2.50, 0.01?x2?0.20, 0<y?2.3 and 1.5?z?3.5, or x1, x2, y and z are 0<x1?2.70, 0.05?x2?0.20, 2.3?y?5.5 and 1?z?2.5.

Abstract: An oxynitride phosphor powder is an ?-SiAlON phosphor having a dominant wavelength of 565-577 nm and fluorescence intensity and external quantum efficiency that are high enough for practical use. The oxynitride phosphor powder comprises an ?-SiAlON represented by the compositional formula: Cax1Eux2Ybx3Si12-(y+z)Al(y+z)OzN16-z (wherein 0.0<x1?2.0, 0.0000<x2?0.0100, 0.0000<x3?0.0100, 0.4?x2/x3?1.4, 1.0?y?4.0, 0.5?z?2.0).

Abstract: An oxynitride phosphor powder has a fluorescence peak wavelength of 610 to 625 nm and also has higher external quantum efficiency than the conventional one. The oxynitride phosphor powder includes an ?-type SiAlON and aluminum nitride, represented by the compositional formula: Cax1Eux2Si12?(y+z)Al(y+z)OzN16?z wherein x1, x2, y, z fulfill the following formulae: 1.60?x1+x2?2.90, 0.18?x2/x1?0.70, 4.0?y?6.5, 0.0?z?1.0. The powder can additionally contain Li in an amount of 50 to 10000 ppm. The content of the aluminum nitride may be more than 0 mass % to less than 33 mass %.

Abstract: A nitride phosphor includes a (Ca,Sr)AlSiN3:Eu phosphor, of which the chemical composition can be controlled easily and which has excellent fluorescent properties. A method produces a nitride phosphor represented by the formula: (Ca1-x1-x2Srx1Eux2)aAlbSicN2a/3+b+4/3c (wherein 0.49<x1<1.0, 0.0<x2<0.02, 0.9?a?1.1, 0.9?b?1.1, 0.9?c?1.1). In the method, a silicon nitride powder is used as a raw material, wherein the silicon nitride powder has a specific surface area of 5 to 35 m2/g and also has such a property that the FS/FSO ((m2/g)/(mass %)) ratio is 8 to 53 and the FS/FIO ((m2/g)/(mass %)) ratio is 20 or more.

Abstract: A method of manufacturing a wavelength conversion member including a polycrystalline ceramics includes mixing a substance serving as a silicon source, a substance serving as an aluminum source, a substance serving as a calcium source, and a substance serving as a europium source; firing the obtained mixture to obtain an oxynitride phosphor powder; then sintering the oxynitride phosphor powder in an inert atmosphere to obtain the polycrystalline ceramics, characterized in that the sintered oxynitride phosphor powder has a composition (excluding oxygen) represented by the Formula: Cax1Eux2Si12-(y+z)Al(y+z)OzN16-z (in the Formula, x1, x2, y, and z are values such that 0<x1?3.40, 0.05?x2?0.20, 3.5?y?7.0, 0?z?1).

Abstract: A method of producing a silicon nitride powder includes heating an amorphous Si—N(—H)-based compound in which assuming that the specific surface area is RS (m2/g) and the oxygen content ratio is RO (mass %), RS/RO is 500 or more, at a temperature rising rate of 12 to 100° C./min in a temperature range from 1,000 to 1,400° C. while flowing the compound by a continuous firing furnace.

Abstract: Provided are a crystalline silicon nitride powder for a siliconitride phosphors, which is used as a starting material for producing a siliconitride phosphor containing a silicon element and a nitrogen element but no oxygen element as a constitutent element, an oxygen content of the silicon nitride phosphor being 0.2-0.8 wt %; a CaAlSiN3 phosphor, an Sr2Si5N8 phosphor, an (Sr, Ca)AlSiN3 phosphor and an La3Si6N11 phosphor, each using the silicon nitride powder; and a method for producing the phosphors.

Abstract: Provided is a silicon nitride powder for siliconitride phosphor having high luminance, a Sr3Al3Si13O2N21 phosphor and a ?-Sialon phosphor using the powder, which can be used for vacuum fluorescent displays (VFDs), field emission displays (FEDs), plasma display panels (PDPs), cathode ray tubes (CRTs), light emitting diodes (LEDs), or the like, and processes for producing these phosphors. The silicon nitride powder for the siliconitride phosphors is a crystalline silicon nitride powder for use as a raw material for producing siliconitride phosphors including a silicon element, a nitrogen element, and an oxygen element, and has an average particle diameter of 1.0 to 12 ?m and an oxygen content of 0.2 to 0.9% by weight.

Abstract: A method for producing an ?-sialon-based oxynitride phosphor includes a mixed powder blended such that the product is represented by the formula: MxSi12?(m+n)Al(m+n)OnN16?n:Lny (wherein M is at least one metal selected from Li, Ca, Mg, Y and a lanthanide metal excluding La and Ce, Ln is at least one lanthanide metal selected from Eu, Dy, Er, Tb and Yb), the mixed powder containing an amorphous silicon nitride powder having an loose bulk density of 0.16 to 0.22 g/cm3, and is fired at 1,400 to 2,000° C. in a nitrogen-containing inert gas atmosphere.

Abstract: A method of producing a silicon nitride powder includes heating an amorphous Si—N(—H)-based compound in which assuming that the specific surface area is RS (m2/g) and the oxygen content ratio is RO (mass %), RS/RO is 500 or more, at a temperature rising rate of 12 to 100° C./min in a temperature range from 1,000 to 1,400° C. while flowing the compound by a continuous firing furnace.

Abstract: An oxynitride phosphor power has a fluorescence peak wavelength of 580 to 605 nm, the oxynitride phosphor having a higher external quantum efficiency than ever before. The oxynitride phosphor powder is an oxynitride phosphor powder containing ?-SiAlON and aluminum nitride, represented by composition formula: Cax1Eux2Si12?(y+z)Al(y+z)OzN16?z wherein x1, x2, y and z are 0<x1?2.50, 0.01?x2?0.20, 0<y?2.3 and 1.5?z?3.5, or x1, x2, y and z are 0<x1?2.70, 0.05?x2?0.20, 2.3?y?5.5 and 1?z?2.5.

Abstract: An oxynitride phosphor powder contains ?-SiAlON and aluminum nitride, obtained by mixing a silicon source, an aluminum source, a calcium source, and a europium source to produce a composition represented by a compositional formula: Cax1Eux2Si12-(y+z)Al(y+z)OzN16-z (wherein x1, x2, y and z are 0<x1?3.40, 0.05?x2?0.20, 4.0?y?7.0, and 0?z?1), and firing the mixture.

Abstract: Provided is a silicon nitride powder for siliconitride phosphor having high luminance, a Sr3Al3Si13O2N21 phosphor and a ?-Sialon phosphor using the powder, which can be used for vacuum fluorescent displays (VFDs), field emission displays (FEDs), plasma display panels (PDPs), cathode ray tubes (CRTs), light emitting diodes (LEDs), or the like, and processes for producing these phosphors. The silicon nitride powder for the siliconitride phosphors is a crystalline silicon nitride powder for use as a raw material for producing siliconitride phosphors including a silicon element, a nitrogen element, and an oxygen element, and has an average particle diameter of 1.0 to 12 ?m and an oxygen content of 0.2 to 0.9% by weight.