Preparation method of lanthanum phosphate ceramic fluorescent material

A fluorescent material, the technology of lanthanum phosphate, applied in the field of preparation of lanthanum phosphate ceramic fluorescent material, can solve the problems of long holding time, instability, high preparation temperature, etc., and achieve the effects of reducing holding time, bright output and transmission, and lowering sintering temperature

Inactive Publication Date: 2014-12-10
CHANGCHUN UNIV OF SCI & TECH
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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 requir...

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  • Preparation method of lanthanum phosphate ceramic fluorescent material
  • Preparation method of lanthanum phosphate ceramic fluorescent material
  • Preparation method of lanthanum phosphate ceramic fluorescent material

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Embodiment Construction

[0025] Below in conjunction with specific embodiment, further illustrate the present invention.

[0026] A method for preparing a lanthanum phosphate ceramic fluorescent material, characterized in that it comprises the following steps:

[0027] Step 1, preparation of precursor:

[0028] Take La 2 o 3 , CeO 2 , Tb 4 o 7 with (NH 4 ) 2 HPO 4 Four medicines, the molar ratio is 0.5-0.9:0.4-0.05:0.3-0.05:1-2. La 2 o 3 Mix it with concentrated nitric acid at a molar ratio of 1:10 to 40, and mix CeO 2 Mix with concentrated nitric acid at a molar ratio of 1:5-20, and mix Tb 4 o 7 Mix it with concentrated nitric acid at a molar ratio of 1:20-70, and add 5%-30% solution volume of hydrogen peroxide to the above three liquids to completely dissolve it. Then, the three solutions were pressed by La 2 o 3 , CeO 2 , Tb 4 o 7 mixed in order. The pH value of the above mixed solution is adjusted between 1 and 4 with ammonia water. Take (NH 4 ) 2 HPO 4 Solid, make it disso...

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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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Application Information

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IPC IPC(8): C09K11/81
Inventor 张希艳殷建柏朝晖王能利米晓云卢利平刘全生孙海鹰王晓春尤莹
Owner CHANGCHUN UNIV OF SCI & TECH
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