Ocean's King Lighting Science and Technology Co., Ltd.

Shuxin Lu

Mingjie Zhou

Wenbo Ma

Yewen Wang

Double core-shell fluorescent materials and preparation methods thereof are provided. The double core-shell fluorescent materials include inner core, inner shell coating the inner core and outer shell coating the said inner shell. The inner core is metal particle and the chemical constitution of the inner shell is silicon dioxide. The outer shell is fluorescent powder represented by the following chemical formula: (R, Eu)O, wherein R is Y, Gd or combination thereof, 0.02&#x2266;x&#x2266;0.1. The double core-shell fluorescent materials with uniform and stable luminous effect not only increase luminous intensity, but also decrease usage amount of fluorescent powder by using metal particle as inner core.

Double core-shell fluorescent materials and preparation methods thereof

A preparation method of zinc manganese silicate is provided. The method includes the following steps: step, preparing silicon dioxide sol with distilled water, anhydrous ethanol and tetraethyl orthosilicate; step, preparing a mixture solution of a zinc salt and a manganese salt; step, adjusting the silicon dioxide sol to be neutral or acidic; stepadding the mixture solution of the zinc salt and the manganese salt into the silicon dioxide sol to form a gelatin; step, drying the gelatin, keeping the temperature, grinding, reducing with keeping the temperature in a reductive atmosphere to obtain zinc manganese silicate. The preparation method has simple technique and low equipment requirement. The particles of the zinc manganese silicate phosphor prepared by the method have a regular size, uniform shape and good luminescent performance.

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Guangdong, China

Shuxin Lu