Extremely enhanced thermal stability of Y2/3Cu3Ti4O12 ceramics by a Pechini method

被引：1
作者：
Wei, Yaxin [1 ,2 ]
He, Donglin [2 ]
Fu, Zhilong [2 ]
Liu, Yafei [2 ,3 ]
Wu, Ruifeng [2 ,3 ]
Li, Wenyuan [2 ,3 ]
Lu, Min [1 ]
Xie, Yahong [1 ,4 ]
Chang, Aimin [2 ,5 ]
Zhang, Bo [2 ,5 ]
机构：
[1] Xinjiang Univ, Sch Chem Engn & Technol, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi, Peoples R China
[2] Xinjiang Tech Inst Phys & Chem CAS, Key Lab Funct Mat & Devices Special Environm CAS, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi, Peoples R China
[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing, Peoples R China
[4] Xinjiang Univ, Sch Chem Engn & Technol, State Key Lab Chem & Utilizat Carbon Based Energy, Urumqi 830017, Peoples R China
[5] Xinjiang Tech Inst Phys & Chem CAS, Key Lab Funct Mat & Devices Special Environm CAS, Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China
来源：
JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2023年 / 106卷 / 03期
基金：
中国科学院西部之光基金; 中国国家自然科学基金;
关键词：
NTC thermistor ceramics; Pechini method; thermal stability; Y2/3Cu3Ti4O12; ELECTRICAL-PROPERTIES; CACU3TI4O12; CERAMICS; NTC CERAMICS; DIELECTRIC-PERMITTIVITY; THERMISTOR FILMS; AGING BEHAVIOR; CU; MICROSTRUCTURE; RESISTANCE; CONSTANT;
D O I：
10.1111/jace.18903
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Y2/3Cu3Ti4O12 ceramic is a novel semiconductor with potential applications in electronic devices. However, its resistance drift and surface structure defects limit the application for negative temperature coefficient thermistor devices. A comparative study of solid-phase and a Pechini processing of Y2/3Cu3Ti4O12 is presented in this paper, in the particular comparative study of stability. The Pechini method is found to be effective in lowering sintering temperature and improving thermal stability (Delta R/R-0 < 0.3%) in comparison with solid-phase method. The origin of the stability deterioration is related to the oxidation state of Cu ions and the migration of sublattice. The Pechini method overcomes stoichiom etric ratio deviations and cation vacancy diffusion, thus reducing metal ion segregation in a continuous high-temperature environment and thereby showing unique insensitivity to oxygen. The important role of the Pechini method in improving thermal stability is revealed, which is expected to be used in the preparation of high stability electron devices.
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页码：1954 / 1969
页数：16
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