In-situ control of different oxygen fugacity experimental study on the electrical conductivity of lherzolite at high temperature and high pressure

doi:10.1016/j.jpcs.2007.08.003

IMR OpenIR

	In-situ control of different oxygen fugacity experimental study on the electrical conductivity of lherzolite at high temperature and high pressure
	Dai, Lidong 1,2; Li, Heping 1; Deng, Heming 1,2; Liu, Congqiang 3; Su, Genli 1; Shan, Shuangming 1,2; Zhang, Lei 1,2; Wang, Riping 1,2
通讯作者	Li, Heping(liheping@vip.skleg.cn)
	2008
发表期刊	JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN	0022-3697
卷号	69 期号:1 页码:101-110
摘要	At pressure 1.0-4.0 GPa and temperature 1073-1423 K and under the control of oxygen fugacity (Mo+MoO2, Fe+FeO and Ni+NiO), a YJ-3000t multi-anvil solid high-temperature and high-pressure apparatus and Solartron-1260 impedance/Gain-Phase analyzer were employed to analyze the electrical conductivity of lherzolite. The experimental results showed that: (1) within the range of the selected frequencies (10(3)-10(6) Hz), either as viewed from the relationship between the real or imaginary part of complex impedance and the frequency, or from the relationship between modulus, phase angle and frequency, it can be seen clearly that the complex impedance has a strong dependence on frequency; (2) with the rise of temperature (T), the electrical conductivity (sigma) increased, and Lg sigma and 1/T follows the Arrhenius relationship; (3) with the rise of pressure, the electrical conductivity decreased, and activation enthalpy and temperature-independent pre-exponential factor decreased as well. And the activation energy and activation bulk volume of the main charge carrier in the lherzolite have been obtained for the first time, which are 1.68 +/- 0.02 eV and 0.04 +/- 0.01 cm(3)/mol, respectively; (4) under the given pressure and temperature, the electrical conductivity tends to increase with increasing oxygen fugacity, and under the given pressure, the activation enthalpy and pre-exponential factor tend to decrease with the rise of oxygen fugacity; (5) at 2.0 GPa and the control of the three solid buffers, Mo+MoO2, Fe+FeO and Ni+NiO, the exponential factors of electrical conductivity variation range with oxygen fugacity are 1/3.19 - 1/3.67, and the theoretical model for the relationship between the electrical conductivity of lherzolite and the oxygen fugacity under high pressure has been established for the first time; (6) the electrical conduction mechanism of small polarons provides a reasonable explanation to the variation of conductivity of lherzolite with oxygen fugacity. (C) 2007 Elsevier Ltd. All rights reserved.
关键词	electrical conductivity
DOI	10.1016/j.jpcs.2007.08.003
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Physics
WOS类目	Chemistry, Multidisciplinary ; Physics, Condensed Matter
WOS记录号	WOS:000253181000016
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：13[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/126254
专题	中国科学院金属研究所
通讯作者	Li, Heping
作者单位	1.Chinese Acad Sci, Inst Geochem, Lab Stud Earths Interior & Geofluids, Guiyang 550002, Peoples R China 2.Grad Sch Chinese Acad Sci, Beijing 100080, Peoples R China 3.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China
推荐引用方式 GB/T 7714	Dai, Lidong,Li, Heping,Deng, Heming,et al. In-situ control of different oxygen fugacity experimental study on the electrical conductivity of lherzolite at high temperature and high pressure[J]. JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,2008,69(1):101-110.
APA	Dai, Lidong.,Li, Heping.,Deng, Heming.,Liu, Congqiang.,Su, Genli.,...&Wang, Riping.(2008).In-situ control of different oxygen fugacity experimental study on the electrical conductivity of lherzolite at high temperature and high pressure.JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS,69(1),101-110.
MLA	Dai, Lidong,et al."In-situ control of different oxygen fugacity experimental study on the electrical conductivity of lherzolite at high temperature and high pressure".JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS 69.1(2008):101-110.