中国物理B ›› 2019, Vol. 28 ›› Issue (5): 56501-056501.doi: 10.1088/1674-1056/28/5/056501

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Conductive property of Zr0.1Fe0.9V1.1Mo0.9O7 with low thermal expansion

Xiaoke He(何小可), Heng Qi(戚恒), Qi Xu(徐启), Xiansheng Liu(刘献省), Lei Xu(许磊), Baohe Yuan(袁保合)   

  1. 1 North China University of Water Resources and Electric Power, Zhengzhou 450011, China;
    2 Henan Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
  • 收稿日期:2018-12-06 修回日期:2019-03-18 出版日期:2019-05-05 发布日期:2019-05-05
  • 通讯作者: Xiansheng Liu, Baohe Yuan E-mail:liuxiansheng69@126.com;yuanbaohe@ncwu.edu.cn
  • 基金资助:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11574276, 51702097, and 11574083), the Program for Innovative Research Team (in Science and Technology) in University of Henan Province, China (Grant No. 16IRTSTHN017), and Henan Science and Technology Development Project, China (Grant No. 182102210241).

Conductive property of Zr0.1Fe0.9V1.1Mo0.9O7 with low thermal expansion

Xiaoke He(何小可)1, Heng Qi(戚恒)1, Qi Xu(徐启)1, Xiansheng Liu(刘献省)2, Lei Xu(许磊)1, Baohe Yuan(袁保合)1   

  1. 1 North China University of Water Resources and Electric Power, Zhengzhou 450011, China;
    2 Henan Key Laboratory of Photovoltaic Materials, Henan University, Kaifeng 475004, China
  • Received:2018-12-06 Revised:2019-03-18 Online:2019-05-05 Published:2019-05-05
  • Contact: Xiansheng Liu, Baohe Yuan E-mail:liuxiansheng69@126.com;yuanbaohe@ncwu.edu.cn
  • Supported by:

    Project supported by the National Natural Science Foundation of China (Grant Nos. 11574276, 51702097, and 11574083), the Program for Innovative Research Team (in Science and Technology) in University of Henan Province, China (Grant No. 16IRTSTHN017), and Henan Science and Technology Development Project, China (Grant No. 182102210241).

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摘要：

Low thermal expansion materials are mostly ceramics with low conductive property, which limits their applications in electronic devices. The poor conductive property of ceramic ZrV2O7 could be improved by bi-substitution of Fe and Mo for Zr and V, accompanied with low thermal expansion. Zr0.1Fe0.9V1.1Mo0.9O7 has electrical conductivity of 8.2×10-5 S/cm and 9.41×10-4 S/cm at 291 K and 623 K, respectively. From 291 K to 413 K, thermal excitation leads to the increase of carrier concentration, which causes the rapid decrease of resistance. At 413-533 K, the conductivity is unchanged due to high scattering probability and a slowing increase of carrier concentration. The conductivity rapidly increases again from 533 K to 623 K due to the intrinsic thermal excitation. The thermal expansion coefficient of Zr0.1Fe0.9V1.1Mo0.9O7 is as low as 0.72×10-6 K-1 at 140-700 K from the dilatometer measurement. These properties suggest that Zr0.1Fe0.9V1.1Mo0.9O7 has attractive application in electronic components.

关键词: low thermal expansion, conductivity, thermal excitation, electric impedance

Abstract:

Low thermal expansion materials are mostly ceramics with low conductive property, which limits their applications in electronic devices. The poor conductive property of ceramic ZrV2O7 could be improved by bi-substitution of Fe and Mo for Zr and V, accompanied with low thermal expansion. Zr0.1Fe0.9V1.1Mo0.9O7 has electrical conductivity of 8.2×10-5 S/cm and 9.41×10-4 S/cm at 291 K and 623 K, respectively. From 291 K to 413 K, thermal excitation leads to the increase of carrier concentration, which causes the rapid decrease of resistance. At 413-533 K, the conductivity is unchanged due to high scattering probability and a slowing increase of carrier concentration. The conductivity rapidly increases again from 533 K to 623 K due to the intrinsic thermal excitation. The thermal expansion coefficient of Zr0.1Fe0.9V1.1Mo0.9O7 is as low as 0.72×10-6 K-1 at 140-700 K from the dilatometer measurement. These properties suggest that Zr0.1Fe0.9V1.1Mo0.9O7 has attractive application in electronic components.

Key words: low thermal expansion, conductivity, thermal excitation, electric impedance

中图分类号:  (Thermal expansion; thermomechanical effects)

  • 65.40.De
84.32.Ff (Conductors, resistors (including thermistors, varistors, and photoresistors)) 73.50.Gr (Charge carriers: generation, recombination, lifetime, trapping, mean free paths)