采用共沉淀法合成的复合添加剂粉体制备ZnO压敏陶瓷,用TG-DTA热分析沉淀物前驱体,通过XRD、SEM、EDS和DLS表征复合粉体的物相、形貌、组成元素、粒度及其分布,测试压敏陶瓷性能、并观察其结构.结果表明,550℃煅烧前驱体生成各添加剂氧化物的混合物；650℃煅烧1h形成组成为(Bi1.14Co0.26Mn0.29)(Sb1.14Cr0.57Ni0.29)O6.25焦绿石型复合添加剂粉体,复合粉体平均粒径为0.26 μm;复合粉体制备的ZnO压敏陶瓷的电位梯度为330 V/mm、非线性系数为47、漏电流为5 μA/cm2,电性能参数分别优于固相法混合添加剂粉体制备的压敏陶瓷,这归因于复合粉体制备的压敏陶瓷具有更均匀的显微结构.
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