| 摘要 |
A manganese-activated zinc orthosilicate phosphor having the empirical formula: Zn(2.00-x-y)MnxSiO(4.00-y)(WO3)z wherein: 0.04</=x</=0.15; 0</=y</=0.05; and 0</=z</=0.002 is provided. A method for preparing the above described phosphor is also disclosed. The method comprises blending a method for preparing manganese-activated zinc orthosilicate phosphor having the empirical formula: Zn(2.00-x-y)MnxSiO(4.00-y)(WO3)z wherein: 0.04</=x</=0.15; 0</=y</=0.05; and 0</=z</=0.002; the method comprising: blending a zinc source, a manganese (II) source, a silicon source, and a tungsten source in amounts in accordance with the formula together with up to about 2 weight percent NH4Cl and up to about 0.2 weight percent NH4F to form a relatively uniform admixture; firing the admixture in a closed container under an inert atmosphere to form the phosphor; milling and washing the phosphor in an aqueous citric acid solution; and rinsing the citric acid washed phosphor with ammonium hydroxide. A low pressure mercury arc discharge device including the above-described phosphor is still further disclosed.
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