Preparation method of lanthanum phosphate ceramic fluorescent material

Abstract

The invention relates to a preparation method of a lanthanum phosphate ceramic fluorescent material. Cerium-terbium-codoped lanthanum phosphate luminescent ceramic is quickly prepared at a low temperature by adopting a method combining microwave treatment with coprecipitation, so that the sintering temperature is reduced, the heat preservation time is reduced, and output and transmission of bright green fluorescence are achieved by rare-earth doping and addition of fluxing agent.

Description

technical field [0001] The patent of the present invention relates to a preparation method of lanthanum phosphate ceramic fluorescent material. Background technique [0002] LaPO 4 : Ce 3+ ,Tb 3+ It is an important kind of high-efficiency green phosphor in the three-color phosphor. It is relatively cheap, easy to prepare and has good ultraviolet response characteristics. Therefore, LaPO 4 :Ce, Tb ceramic materials are widely used in the fields of luminescence, lighting, imaging, laser and display technology. [0003] Although it has been widely studied at present, it still faces certain problems in the specific application process. In the application of fluorescent screens for CCD, gravity precipitation method, centrifugal precipitation method, slurry method, blowing method, photosensitive viscous method, printing method, electrophoresis method, electrophotography method and other methods are mainly used to realize the preparation of fluorescent screen at present. It is...

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Problems solved by technology

In the application of fluorescent screens for CCD, gravity precipitation method, centrifugal precipitation method, slurry method, blowing method, photosensitive viscous method, printing method, electrophoresis method, electrophotography method and other methods are mainly used to realize the preparation of fluorescent screen at present. It is necessary to prepare a powder with good luminescence performance, uniform particle size and small size, and then coat the powder on the UV-transparent quartz substrate. This not only requires a long preparation period, but also requires harsh and unstable process conditions, and the prepared screen is durable. Poor abrasiveness is not conducive to its application

[0004] In terms of phosphate ceramics, the existing research only focuses on the mechanical properties of itself or combined with alumina. It is mainly prepared by methods such as no pressure, hot pressing and discharge plasma. The preparation temperature is high, the holding time is long, and there is no optical property. Cannot be used in the field of display

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