Effect of CaCu3Ti4O12precursor crystal on dielectric properties of ceramic

摘要:

采用溶胶-凝胶法制备CaCu3Ti4O12(CCTO)陶瓷粉体,研究煅烧后CCTO前驱体晶相对烧结成型后的陶瓷介电性能的影响。通过控制煅烧温度(450℃,500℃,550℃,600℃)来控制粉体物相,最后用1050℃进行烧结.结果表明,在低温下煅烧的粉体经过高温烧结也可以得到纯CCTO晶相.在未形成CCTO晶相下烧结的样品,晶粒更加粗大,拥有更高的介电常数和介电损耗.其中500℃样品介电性能表现最好,在1 kHz时达到4.7×104,而介电损耗也在1 kHz时降到0.11,介电弛豫更加明显.形成CCTO晶相下烧结得到的样品,在介电性能方面表现出更加出色的温度稳定性和频率稳定性.

CaCu3Ti4O12(CCTO)ceramic powders were prepared by sol-gel method.The effect of calcined CCTO precursor on the dielectric properties of ceramics after sintering was investigated.The phase of the powder was controlled by controlling the calcination temperature(450℃,500℃,550℃,600℃).Finally,the powder was sintered at 1050℃.The results show that the pure CCTO crystal phase can also be obtained by sintering the powder at low temperature.The samples sintered without CCTO crystal phase are smoother and coarser with higher dielectric constant and loss.Among them,the dielectric constant of 500℃sample is the best,reaching 4.7×104 at 1 kHz,and the dielectric loss is also reduced to 0.11 at 1 kHz,and the dielectric relaxation is more obvious.The samples sintered under CCTO crystal phase show better temperature stability and frequency stability in dielectric properties.

作者:

王显威 李盛男 赵雪至 马永豪 尚淑英 尚军 尹少骞 胡艳春

Wang Xianwei;Li Shengnan;Zhao Xuezhi;Ma Yonghao;Shang Shuying;Shang Jun;Yin Shaoqian;Hu Yanchun(School of Physics,Henan Key Laboratory of Photovoltaic Materials,Henan Normal University,Xinxiang 453007,China)

机构地区:

betway官方app 物理学院

出处:

《betway官方app 学报：自然科学版》 CAS 北大核心 2021年第1期25-30,共6页

基金:

国家自然科学基金(51402091,51601059) 河南省高等学校重点科研项目基础研究计划(19B43005) betway官方app 专项科研基金(20180543) 国家大学生创新创业计划项目(201910476028).

关键词:

CaCu3Ti4O12 介电性能 晶相 煅烧温度

CaCu3Ti4O12 dielectric properties crystalline phases calcination temperature

分类号:

TQ174.1 [化学工程—陶瓷工业]

CaCu_(3)Ti_(4)O_(12)前驱体煅烧温度对其介电性能的影响.pdf