【摘要】 采用固相反应法在不同温度(950～1100℃)下预烧后烧结制备CaCu3Ti4O12(CCTD)陶瓷。对CCTO陶瓷进行物相分析,并测试了20Hz-1MHz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CCTD陶瓷室温1kHz频率下介电常数可达12444。更多还原

【Abstract】 CaCu3Ti4O12(CCTO) ceramics were prepared by solid state reaction. The calcining temperature was in the range from 950 ℃ to 1100℃. The phase analyses were determined by XRD. And dielectric properties and impedance spectroscopes of CCTO ceramics were evaluated in the range of 20 Hz-1 MHz and 25-150℃. Effects of the calcining temperature on sintering properties,crystal structure and dielectric properties of CCTO ceramics were investigated. These results showed that lower calcining temperature favors the sintering of CCTO ceramics. Then CCTO ceramics with better dielectric properties was obtained easier. The dielectric constant at room temperature and 1 kHz was 12 444 for CCTO ceramic,which were calcined and sintered at 950 ℃ and 1120℃,respectively.更多还原