New negative temperature coefficient ceramics in Ca1-xYxCu3Ti3.9Zr0.1O12 system

被引：9

作者：

Chen, Xingyu ^{[1
,2
]}

Zhang, Bo ^{[1
]}

Chang, Aimin ^{[1
]}

机构：

[1] Xinjiang Syst Inst Phys & Chem CAS, Key Lab Funct Materials, Xinjiang Key Lab Elect Informat Materials, Devices Special Environments CAS,Devices, Urumqi, Peoples R China

[2] Univ Chinese Acad Sciences, Beijing, Beijing, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS | 2020年 / 31卷 / 02期

基金：

中国国家自然科学基金;

关键词：

HIGH-DIELECTRIC-CONSTANT; ELECTRICAL-PROPERTIES; CACU3TI4O12; SPECTROSCOPY;

D O I：

10.1007/s10854-019-02692-0

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The new negative temperature coefficient (NTC) ceramics based on Ca1-xYxCu3Ti3.9Zr0.1O12 (x = 0, 0.01, 0.03, 0.05) compositions have been successfully synthesized by traditional solid-state method. The results of X-ray diffraction show that the major phase of all samples is CaCu3Ti4O12 (CCTO) with body-centered cubic structure. Scanning electron microscope images confirm that Y3+ doping can inhibit the growth of grains. X-ray photoelectron spectroscopy analysis fully demonstrates the coexistence of Cu+/Cu2+ and Ti3+/Ti4+ ions in ceramic samples, and also proves that with the increase of Y3+ content, the concentration of Cu+ and Ti3+ ions increases, which is the main reason for the decrease of resistivity. The resistivity of all ceramic specimens decreases with the increase of temperature, which is consistent with NTC behavior. The obtained values of rho(25), B-200/500, and E-a of the sintered samples are in the range of 2.76 x 10(7)-1.10 x 10(8 )omega cm, 6633-6755 K, and 0.572-0.582 eV, respectively.

引用

页码：1745 / 1751

页数：7

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