Metal mixed oxide, phosphor, phosphor paste and light-emitting device
AssigneeSumitomo Chemical Company, Limited
InventorsSatoru Kuze, Yoshiko Nakamura
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Abstract
Disclosed is a metal mixed oxide which enables to obtain a phosphor exhibiting higher emission luminance. Also disclosed are a phosphor containing such a metal mixed oxide, a phosphor paste and a light-emitting device. The metal mixed oxide contains the following (1), (2) and (3) as metal elements: (1) (an) alkaline earth metal element(s) selected from Ba, C and Mg; (2) aluminum (Al); and (3) at least one element (M) selected from rare earth elements and manganese. In this connection, when the molar ratio of Ba:Ca:Mg:Al:M is expressed as a:b:c:d:e, the following relations are satisfied: 0.3≦a≦8, 0≦b<12.5, 0≦c<12.5, 11≦a+b+c≦13, 13≦d≦15, 0.0001≦e≦1.0.
Claims10
A metal mixed oxide containing the following (1), (2) and (3) as metal elements:
- (1) (an) alkaline earth metal element(s) selected from Ba, Ca and Mg;
- (2) aluminum (Al);
- and
- (3) at least one element (M) selected from the group consisting of rare earth elements and manganese;
- wherein when the molar ratio of Ba:Ca:Mg:Al:M is expressed as a:b:c:d:e, the following relations are satisfied:
- 0.3≦a≦8;
- 0≦b<12.5;
- 0≦c<12.5;
- 11≦a+b+c≦13;
- 13≦d≦15, and
- 0.0001≦e≦1.0.
(canceled)
Dependencies are inferred from the claim text.