采用稀土氧化物Pr6O11对ZnO-Bi2O3系压敏材料进行了改性研究,探讨了Pr6O11对该材料主要性能及微观结构的影响.结果表明,Pr6O11掺杂量较小时,能够显著提高ZnO压敏材料非线性系数,减小漏电流,并基本不影响压敏电压.当Pr6O11掺杂达到一定量时,在保持较高非线性系数,较小漏电流的同时,压敏电压与不含Pr6O11的ZnO压敏材料相比提高约60%;XRD、SEM等分析表明Pr6O11的引入改变了原有材料的微观结构组织,使该材料微观结构中ZnO晶粒尺寸减小,分布均匀、致密.
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