Spherical terbium doped tungstate green phosphor and preparation thereof
A technology of green fluorescent powder and tungstate, which is applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of irregular particle shape, uneven size distribution, and degradation of phosphor performance, so as to facilitate lighting and lighting. Color rendering, easy to promote and use, and not easy to be damaged by radiation
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[0025] Embodiment 1: adopt hydrothermal method to synthesize Tb 3+ doped CaWO 4 Phosphor. Weigh 1.1215gTb 4 o 7 Dissolve in 1.3ml of hot 65% concentrated nitric acid, and then dilute to 50ml to form 0.12mol / l terbium nitrate solution. Another 52.54g of citric acid and 8.974g of calcium nitrate were weighed and dissolved in 240ml of deionized water, and then the terbium nitrate solution obtained above was added and stirred continuously for 30 minutes. Weigh 16.492g Na 2 WO 4 2H 2 O was dissolved in deionized water with constant stirring. Then add the sodium tungstate solution dropwise into the above mixed solution, and keep stirring for 60 minutes, so that the rare earth ions and barium ions fully react with the tungstate ions. Then transfer the precipitate and the solution into a hydrothermal reaction kettle, heat it at 180°C for 12 hours, then cool it to room temperature, wash it with alcohol and deionized water three times, centrifuge to obtain a white precipitate an...
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