Preparation method of zinc manganese silicate fluorescent powder with short afterglow

A technology of zinc manganese silicate and phosphor powder, applied in the field of optoelectronics, can solve the problems of complex PDP screen-making process, poor phosphor powder crystallization, complicated process, etc., and achieve the effect of shortening afterglow time, suitable for large-scale production and simple process

Inactive Publication Date: 2014-12-17
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But this method is complicated, the crystallization of the phosphor powder is poor, and the particle size of the green phosphor powder does not match the other two phosphor powders, and the process of PDP screen making is correspondingly complicated.
Chinese patent CN03126899.4 discloses a method for synthesizing short-afterglow zinc-manganese silicate phosphors by metal nitrate-organic combustion method. This method also has the problems of many defects and poor crystallization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 0.82 moles of ZnO, ZnMn 2 o 4 0.06 mol, SiO 2 0.5 mole, NH 4 1 g of F, mixed well, put into an alumina crucible, put into a high temperature furnace, heat up to 1300°C and burn for 4 hours, take it out after cooling. The calcined product is ball milled, washed with deionized water until neutral, dehydrated, and dried to obtain silicate green fluorescent powder. The afterglow time of the phosphor under the excitation of 147nm ultraviolet light is 4.5 milliseconds.

Embodiment 2

[0022] Weigh 0.79 moles of ZnO, ZnMn 2 o 4 0.07 mol, SiO 2 0.5 mole, NH 4 1 g of F, mixed well, put into an alumina crucible, put into a high temperature furnace, heat up to 1300°C and burn for 4 hours, take it out after cooling. The calcined product is ball milled, washed with deionized water until neutral, dehydrated, and dried to obtain silicate green fluorescent powder. The afterglow time of the phosphor under the excitation of 147nm ultraviolet light is 4.0 milliseconds.

Embodiment 3

[0024] Weigh 0.82 moles of ZnO, ZnMn 2 o 4 0.06 mol, SiO 2 0.5 mole, NH 4 HF 2 1 g, mix well and put into an alumina crucible, put it into a high-temperature furnace, heat up to 1400°C and burn for 3 hours, take it out after cooling. The calcined product is ball milled, washed with deionized water until neutral, dehydrated, and dried to obtain silicate green fluorescent powder. The afterglow time of the phosphor under the excitation of 147nm ultraviolet light is 4.48 milliseconds.

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PUM

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Abstract

The invention discloses a preparation method of zinc manganese silicate fluorescent powder with short afterglow. The fluorescent powder is prepared by a high temperature solid state method, wherein the source of Mn is ZnMn2O4 instead of conventional manganese oxide or manganese carbonate or other compounds. The zinc manganese silicate green fluorescent powder prepared by the method is high in luminous intensity and short in afterglow time, thus completely meeting the requirement on 3D plasma display. The preparation method does not change existing technology of preparing the zinc manganese silicate fluorescent powder by the high temperature solid state method, thus being easy to implement industrially, and very applicable to scale production.

Description

technical field [0001] The invention belongs to the field of optoelectronic technology, and relates to a preparation method of silicate green fluorescent powder. Background technique [0002] mn 2+ doped Zn 2 SiO 4 As a green phosphor, it has been widely used in fluorescent lamps, CRTs, and long-lasting displays since the 1840s. After the 1960s, Zn 2 SiO 4 :Mn 2+ Due to the high luminance, good color coordinates and good stability under the excitation of vacuum ultraviolet light, the green phosphor has been valued and applied in the plasma (PDP) flat panel display technology. [0003] After entering the 21st century, 3D display technology has developed rapidly. PDP has become a good carrier of 3D technology because of its high dynamic definition and fast response. 3D-PDP technology has very strict requirements on the afterglow performance of phosphors, and the afterglow time is required to be shorter than 5 milliseconds, otherwise ghosting or trailing will appear whe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
Inventor 董岩梁玲顾维杰邵起越蒋建清
Owner SOUTHEAST UNIV
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