采用固相反应法在不同温度(950~1100 ℃)下预烧后烧结制备CaCu3Ti4O12(CCTO)陶瓷.对CCTO陶瓷进行物相分析,并测试了20 Hz~1 MHz频率范围和25~150 ℃温度区间的介电性能和阻抗谱,详细研究了预烧温度对CCTO陶瓷烧结性能、晶体结构和介电性能的影响.结果表明,较低的预烧温度有利于CCTO陶瓷的烧结,容易获得介电性能较好的CCTO陶瓷.950 ℃预烧后,于1120 ℃烧结的CCTO陶瓷室温1 kHz频率下介电常数可达12 444.
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