摘要
研究了合成CaCu_3Ti_4O_(12)巨介电响应氧化物的固相反应。用X射线衍射跟踪反应进程。该反应以CaTiO_3为中间产物。两步合成工艺可以降低完全反应所需温度,并可在不超过1000℃下合成单相CaCu_3Ti_4O_(12)。通过引入过量CuO,进一步提高了介电常数,降低了介电损耗。在1080℃下烧成的CuO过量4mol%的陶瓷试样,相对介电常数为29000,损耗角正切值为0.06(1kHz)。
The solid state reaction to synthesize giant dielectric response oxide CaCus Ti4O12 is studied. The reaction procedure is traced by XRD. It is found that CaTiO3 is an intermediate phase during the reaction. The temperature necessary to complete the reaction can be lowered in the two-step synthesis process. The single phase CaCusTi4O12 can be obtained at the calcination temperature not higher than 1000℃ by the two-step method. Introducing excess CuO further increases the dielectric constant and decreases the dielectric loss. The final ceramics with 4 mol CuO sintered at 1080℃ has a relative dielectric constant of 29000 and a loss of 0. 06 at room temperature and lkHz.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2007年第12期118-120,共3页
Materials Reports
基金
天津市自然科学基金项目(023061911)
关键词
无机非金属材料
巨介电响应
固相反应
介电性能
inorganic non-metallic materials, giant dielectric respon, solid state reaction, dielectric properties
