通过改变水热反应中的原料—磷源,制备了不同尺寸大小的LaPO_4：Eu~（3＋）纳米荧光粉。XRD分析表明,所有的水热反应产物均可归属为单斜晶系。水热产物再经900℃的热处理后.LaPO_4：Eu~（3＋）荧光粉晶粒尺寸变大,同时结晶度提高。通过对比不同尺寸的LaPO_4：Eu~（3＋）荧光粉在紫外和真空紫外激发两种模式下的发光强度,认为晶粒大小在紫外和真空紫外激发两种不同的激发模式下对荧光粉发光强度的影响完全不同。
LaPO_4：Eu~（3＋） nanophosphors with different sizes were prepared by hydrothermal reaction with different phosphorus sources.The results by XRD show that all products were ascribed to monociinic crystal.The size of the products became larger and the crystallization was improved after heat treatment at 900℃.The compared results of the emission intensity of samples with different sizes under different excitations showed that the effect of the crystal size on the emission intensity of the samples excited under UV and VUV sources is quite different.
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