CAJ | 학술논문

利用溶胶-凝胶工艺制备CaCusTi4O12粉体,经相同压力和时间冷压后,于1 000℃下进行烧结,制备CaCu3Ti4O12陶瓷.微观组织观察表明,烧结时间对复合陶瓷的晶粒尺寸有显著的影响；烧结不同时间的复合陶瓷的介电常数和介电损耗在50 Hz到100 kHz的范围内表现出弱的频率相关性.随着频率的增加,复合材料的介电损耗降低,而介电常数保持在一个较高值.最佳的烧结时间为6h.
이용용효-응효공예제비CaCusTi4O12분체,경상동압력화시간냉압후,우1 000℃하진행소결,제비CaCu3Ti4O12도자.미관조직관찰표명,소결시간대복합도자적정립척촌유현저적영향；소결불동시간적복합도자적개전상수화개전손모재50 Hz도100 kHz적범위내표현출약적빈솔상관성.수착빈솔적증가,복합재료적개전손모강저,이개전상수보지재일개교고치.최가적소결시간위6h.
CaCu3Ti4O12 powder was prepared by sol-gel technique,and the CaCu3Ti4O12 composites were sintered at 1 000 ℃ for different time after cold pressing with the same pressure and time.The results exhibit that the grain size is affected by the pressure and sintering time.The impedance spectrum measurement results show that both the dielectric constant and dielectric loss have a weak frequency dependence over large frequency region of 50 Hz to 100 kHz,and not only does the dielectric loss decrease but also the dielectric constant remains high sufficiently.The most suitable sintering time is 6 h.