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以十六烷基三甲基溴化铵(CTAB)为模板,采用沉淀法合成了板条状钨酸铅晶体.用X射线粉末衍射、扫描电镜、热分析、红外光谱和荧光光谱表征产物的结构和性质.结果表明,随着沉淀物熟化时间的增加,钨酸铅晶体结构从四方晶型转变为单斜晶型,外貌从层叠的塔状结构演变成板条状结构.相变还引起了571 cm-1的红外吸收峰强度的增大,但对热稳定性影响较小.不同熟化时间制备晶体的荧光发射光谱基本一致,都出现较强的378 nm蓝光发射峰.

参考文献

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