通过一种简单的共沉淀方法制备了Mn 掺杂二氧化锡(SnO2)颗粒, 对前驱体在不同温度下热处理, 并通过X 射线衍射(X-ray diffraction, XRD)和高分辨电子显微学(high-resolution transmission electron microscopy,HRTEM)对样品的微纳米结构进行了表征. 结果表明: 样品中除了四方相SnO2 外, 还存在正交相SnO2. XRD 测试结果显示, 随着退火温度的增加, 正交相SnO2 的峰强减弱, 四方相的峰强增加. HRTEM 分析表明: 样品中可以同时找到四方相和正交相SnO2的晶格像, 进一步证实了正交相SnO2的存在. Mn 掺杂SnO2 后, Mn 离子进入SnO2晶胞, 替代了Sn 离子, 因此引起晶格扭曲畸变, 对正交相SnO2的形成起着重要的作用.
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