Sulfur-containing phosphor coated with ZnO compound
AssigneeMitsui Mining & Smelting Co., Ltd.
InventorsJun-ichi Itoh, Asuka Sasakura, Masaaki Inamura, Riichi Ogawara, Akinori Kumagai
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Abstract
Provided is a novel coated phosphor capable of effectively suppressing the adverse effects of hydrogen sulfide gas generated by the reaction between a sulfur-containing phosphor and moisture in the air. Provided is a sulfur-containing phosphor having a configuration in which ZnO compound containing Zn and O is present on the surface of a sulfur-containing phosphor having a host material which includes sulfur.
Claims20
A ZnO compound coated sulfur-containing phosphor particle having:
- a configuration in which a ZnO compound containing Zn and O and a glass layer containing a glass composition are present on a surface of the sulfur-containing phosphor particle;
- a host material containing sulfur and one or more selected from a group consisting of calcium, barium, strontium, and gallium;
- and a luminescent center.
A ZnO compound coated sulfur-containing phosphor particle comprising:
- a ZnO compound layer consisting of a ZnO compound including Zn and O;
- a glass layer containing a glass composition on a surface of the sulfur-containing phosphor particle;
- a host material containing sulfur and one or more selected from a group consisting of calcium, barium, strontium, and gallium;
- and a luminescent center.
A ZnO compound coated sulfur-containing phosphor particle having:
- a configuration in which a ZnO compound containing Zn and O, a glass layer containing a glass composition, and a water resistant layer are present on a surface of the sulfur-containing phosphor particle;
- and a host material containing sulfur and one or more selected from a group consisting of calcium, barium, strontium, and gallium;
- and a luminescent center,
- wherein the water resistant layer comprises one type of hydroxide, oxide, or fluoride selected from a group consisting of Ti, Zn, Mg, Ca, Sr, Ba, Al, Ga, In, Sn, Zr, and Y, or a mixture of two or more of them.
Dependencies are inferred from the claim text.