采用传统固相反应法制备了铌酸钠钾(KNN)粉体,在该粉体中添加碳纳米管(CNT)后,制备成CNT-KNN复合材料,研究了该复合材料的介电和压电性能.实验发现CNT的添加没有改变KNN压电陶瓷的晶体结构.少量的CNT添加(0.02‰(质量分数))提高了压电性能,过多的CNT(>0.02‰(质量分数))会导致压电性能降低.同时发现,CNT的添加降低了样品的介电常数,介电性能明显依赖于密度关系.
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