Evaluation of Zn-substituted La0.5Sr0.5CoO3 ceramics as functional materials for thick-film resistors
点击次数：发表时间：2025-05-23
- 所属单位：[1]Univ Elect Sci & Technol China, Sch Elect Sci & Engn, State Key Lab Elect Thin Films & Integrated Devic, Chengdu 610054, Peoples R China;[2]Univ Elect Sci & Technol China, Yangtze Delta Region Inst Huzhou, Huzhou, Peoples R China;[3]Hainan Univ, Sch Mat Sci & Engn, Haikou, Hainan, Peoples R China
- 发表刊物：JOURNAL OF THE AMERICAN CERAMIC SOCIETY
- 关键字：conductivity; first-principles calculations; functional material; thick film resistors
- 摘要：This work focuses on the evaluation of La0.5Sr0.5Co1-xZnxO3 (LSCZ, x = 0.00-0.10) ceramics as an air-fireable and economical functional material for thick film resistors. Solid-state reaction experiments and first-principles calculations were conducted to investigate the crystal structure, thermal behaviors, and electrical properties of LSCZ ceramics. The substitution of Zn2+ modified the bond properties, electron distribution, and band structure, resulting in more serious structural deformation, increasing the bond population of Co-O and weakening the charge transfer of LSCZ. Experimental results showed that the addition of Zn2+ lowered the densification temperature, activation energy, and crystallite size. As the ratio of Zn2+ increased, the conductivity and temperature coefficient of resistance showed a downward trend. Impedance variation with frequency and thermal aging tests were also performed. For the x = 0.05 specimen sintered at 1200 degrees C, values of 95.5% for relative density, 2857 S/cm for conductivity, 1267 ppm/degrees C for temperature coefficient of resistance, -0.47% for conductivity change could be achieved.
- 文献类型：Article
- 卷号：105
- 期号：4
- 页面范围：2744-2753
- ISSN号：0002-7820
- 是否译文：否
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- 性别：男
- 职称：教授
- 毕业院校：电子科技大学
- 学历：博士研究生毕业
- 学位：工学博士学位
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- 2012 当选： 新世纪优秀人才计划
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