The dielectric properties of CCTO ceramics prepared via different quick quenching methods

被引：17
作者：
Zhang, Jianhua [1 ]
Zheng, Jiecheng [1 ]
Liu, Yuqian [1 ]
Zhang, Chengzhong [1 ]
Hao, Wentao [2 ,3 ]
Lei, Zhipeng [1 ]
Tian, Muqin [1 ]
机构：
[1] Taiyuan Univ Technol, Coll Elect & Power Engn, Natl & Prov Joint Engn Lab Min Intelligent Elect, Shanxi Key Lab Coal Min Equipment & Safety Contro, 79 Yingze West Ave, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Technol, Minist Educ, Key Lab Adv Transducers & Intelligent Control Sys, Taiyuan 030024, Shanxi, Peoples R China
[3] Taiyuan Univ Technol, Coll Phys & Optoelect, Jinzhong 030600, Shanxi, Peoples R China
来源：
MATERIALS RESEARCH BULLETIN | 2019年 / 115卷
基金：
中国国家自然科学基金; 美国国家科学基金会;
关键词：
Ceramics; Sol-gel chemistry; Microstructure; Impedance spectroscopy; Dielectrics; LOW LOSS TANGENT; ELECTRICAL-PROPERTIES; CACU3TI4O12; CERAMICS; MICROSTRUCTURE; CONSTANT; PERMITTIVITY;
D O I：
10.1016/j.materresbull.2019.03.006
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, the microstructure and dielectric properties of CaCu3Ti4O12 (CCTO) ceramics based on sol-gel method prepared via different cooling methods (furnace cooling, air quenching, and water quenching) were systematically studied. The results showed that the dielectric constant of quick quenching samples (air quenching and water quenching) did not drop a lot contrasting to that of the furnace cooling CCTO ceramics. Furthermore, it was also found that the dielectric loss of air quenching CCTO ceramics decreased to 0.030, which was about 40% of the furnace cooling CCTO ceramics (0.074), and the dielectric loss of water quenching samples was as low as 0.044. In addition, the breakdown electric field could also be improved by air quenching. These enhancements could be attributed to the improved properties of the grain boundaries. The results above indicate that a proper quenching method can promote the dielectric properties of CCTO ceramics efficiently.
引用
收藏
页码：49 / 54
页数：6
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