Chin. Phys. Lett.  2005, Vol. 22 Issue (8): 2140-2142    DOI:
Original Articles |
Electrical Properties of Natural Pyroxenite
YI Li1,2;WANG Duo-Jun1,3;LI He-Ping1
1Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002 2Graduate School of Chinese Academy of Sciences, Beijing 100039 3State Key Laboratory of Earthquake Dynamics, Institute of Geology, China Earthquake Administration, Beijing 100029
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YI Li, WANG Duo-Jun, LI He-Ping 2005 Chin. Phys. Lett. 22 2140-2142
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Abstract The complex electrical properties of natural pyroxenite were measured over a frequency range from 0.01 to 106Hz, at 3.0GPa and 1266--1504K, using the solid buffers (Mo--MoO2) to control the oxygen fugacity. The frequency dependence of electrical properties for the natural pyroxenite is investigated. Two distinct conduction mechanisms of the natural pyroxenite are observed: grain interior and grain boundary conduction. Grain interior transport controls the response above 100Hz, whereas grain boundary transport dominates between ~ 100 and 0.01Hz. Electrical response of natural pyroxenite is modelled with an equivalent circuit in which parallel RC circuit elements representing grain interior and grain boundary responses act in series. The grain boundaries do not enhance the total conductivity of natural pryoxenite. The total electrical conductivity of natural pyroxenite is lower than either grain interior or grain boundary conductivity alone.
Keywords: 91.60.Pn      91.60.Gf      91.60.Ed      73.20.Hb     
Published: 01 August 2005
PACS:  91.60.Pn (Magnetic and electrical properties)  
  91.60.Gf (High-pressure behavior)  
  91.60.Ed (Crystal structure and defects, microstructure)  
  73.20.Hb (Impurity and defect levels; energy states of adsorbed species)  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2005/V22/I8/02140
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