采用微波法制备出一系列刚玉结构的掺杂Sn4+和Zn2+的α-Fe2O3纳米粒子,并用厚膜工艺将粉体涂在陶瓷基片上制成湿敏元件.通过对粉体的XRD测试与分析发现,部分Sn4+和Zn2+以类质同象的方式进入到α-Fe2O3晶格中代替Fe3+,改变了α-Fe2O3的晶胞参数,同时晶粒尺寸减小,达到微细化的效果.测试了元件在不同湿度下的电阻,结果表明掺杂提高了α-Fe2O3的湿敏性.
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