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Ni–Mn–Sn–O 体系相组成及其在负温度系数热敏电阻中的应用

DOI: 10.14062/j.issn.0454-5648.2015.06.11

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Abstract:

采用固相法制备Ni–Mn–Sn–O系单相尖晶石结构化合物。使用X-射线衍射技术确定了该体系的成相范围和温度,并判定该尖晶石结构的阳离子分布。结果表明Ni元素摩尔含量在15%以下时,形成四方尖晶石相;在15%~30%之间时形成立方尖晶石相;大于30%时则易析出NiO相。Sn元素的含量对成相温度有重要影响,其含量越多,成相温度越高。但当Sn元素含量达到30%以上时,则不能进入尖晶石结构中。Sn元素以Sn4+的形式占据尖晶石结构中的B位,导致其电阻率和热敏常数B值急剧增加。

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