中国物理B ›› 2020, Vol. 29 ›› Issue (1): 10702-010702.doi: 10.1088/1674-1056/ab5934

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

A new technology for controlling in-situ oxygen fugacity in diamond anvil cells and measuring electrical conductivity of anhydrous olivine at high pressures and temperatures

Wen-Shu Shen(沈文舒), Lei Wu(吴雷), Tian-Ji Ou(欧天吉), Dong-Hui Yue(岳冬辉), Ting-Ting Ji(冀婷婷), Yong-Hao Han(韩永昊), Wen-Liang Xu(许文良), Chun-Xiao Gao(高春晓)   

  1. 1 State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China;
    2 School of Mechatronics Engineering, Guizhou Minzu University, Guiyang 550002, China;
    3 College of Earth Sciences, Jilin University, Changchun 130061, China
  • 收稿日期:2019-09-30 修回日期:2019-11-08 出版日期:2020-01-05 发布日期:2020-01-05
  • 通讯作者: Chun-Xiao Gao E-mail:cc060109@qq.com
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11674404, 41330206, and 11374121).

A new technology for controlling in-situ oxygen fugacity in diamond anvil cells and measuring electrical conductivity of anhydrous olivine at high pressures and temperatures

Wen-Shu Shen(沈文舒)1, Lei Wu(吴雷)2, Tian-Ji Ou(欧天吉)1, Dong-Hui Yue(岳冬辉)1, Ting-Ting Ji(冀婷婷)1, Yong-Hao Han(韩永昊)1, Wen-Liang Xu(许文良)3, Chun-Xiao Gao(高春晓)1   

  1. 1 State Key Laboratory for Superhard Materials, Jilin University, Changchun 130012, China;
    2 School of Mechatronics Engineering, Guizhou Minzu University, Guiyang 550002, China;
    3 College of Earth Sciences, Jilin University, Changchun 130061, China
  • Received:2019-09-30 Revised:2019-11-08 Online:2020-01-05 Published:2020-01-05
  • Contact: Chun-Xiao Gao E-mail:cc060109@qq.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11674404, 41330206, and 11374121).

摘要: We present a novel technique for controlling oxygen fugacity, which is broadly used to in-situ measure the electrical conductivities in minerals and rocks during diamond anvil cell experiments. The electrical conductivities of olivine are determined under controlled oxygen fugacity conditions (Mo-MoO2) at pressures up to 4.0 GPa and temperatures up to 873 K. The advantages of this new technique enable the measuring of the activation enthalpy, activation energy, and activation bulk volume in the Arrhenius relationship. This provides an improved understanding of the mechanism of conduction in olivine. Electrical conduction in olivine is best explained by small polaron movement, given the oxygen fugacity-dependent variations in conductivity.

关键词: high pressure, high temperature, oxygen fugacity

Abstract: We present a novel technique for controlling oxygen fugacity, which is broadly used to in-situ measure the electrical conductivities in minerals and rocks during diamond anvil cell experiments. The electrical conductivities of olivine are determined under controlled oxygen fugacity conditions (Mo-MoO2) at pressures up to 4.0 GPa and temperatures up to 873 K. The advantages of this new technique enable the measuring of the activation enthalpy, activation energy, and activation bulk volume in the Arrhenius relationship. This provides an improved understanding of the mechanism of conduction in olivine. Electrical conduction in olivine is best explained by small polaron movement, given the oxygen fugacity-dependent variations in conductivity.

Key words: high pressure, high temperature, oxygen fugacity

中图分类号:  (Physical properties of rocks and minerals)

  • 91.60.-x
91.60.Gf (High-pressure behavior) 91.60.Ki (Thermal properties)