| 发明名称 |
Process for preparing a divalent europium activated alkaline earth metal aluminate phosphor |
| 摘要 |
A process for preparing a divalent europium activated alkaline earth metal aluminate phosphor represented by the composition formula AMgOxbBaOxcAl2O3xdEuO wherein a, b, c and d satisfy the conditions A+B+C+D=10, AND 0<A</=2.00, 0.25</=B</=2.00, 6.0</=C</=8.5, 0.05</=D</=0.30. A magnesium compound easily alterable to MgO at a high temperature, barium halide or mixture of barium compounds easily alterable to BaO at a high temperature containing barium halide at such a rate that the amount of barium contained in the barium halide is not less than 70% by weight of the total amount of barium in the mixture of the barium compounds, an aluminium compound easily alterable to Al2O3 at a high temperature and a europium compound easily alterable to Eu2O3 at a high temperature are mixed at a mixing weight ratio to satisfy the above composition formula. The mixture thus obtained is fired in air at a temperature of 1200 DEG C. to 1600 DEG C. and then further fired in a reducing atmosphere at a temperature of 1000 DEG C. to 1600 DEG C.
|
| 申请公布号 |
US4161457(A) |
申请公布日期 |
1979.07.17 |
| 申请号 |
US19770777692 |
申请日期 |
1977.03.15 |
| 申请人 |
DAI NIPPON TORYO K K;NIPPON HOSO KYOKAI |
发明人 |
HASE, TAKASHI;KAGAMI, AKIYASU;KOIKE, JUNRO;KOJIMA, TAKEHIRO;MIMURA, YOSHIYUKI;NARITA, KINICHIRO;TAKAHASHI, KOICHI;TOYONAGA, RYUYA |
| 分类号 |
C09K11/77;(IPC1-7):C09K11/46 |
主分类号 |
C09K11/77 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
