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| Temperature and pressure dependence of electrical conductivity in synthetic anorthite | |
| Haiying Hu; Lidong Dai; Heping Li; Keshi Hui; Jia Li | |
| 2015 | |
| Source Publication | Solid State Ionics
 |
| Volume | 276Issue:1Pages:136-141 |
| Abstract | Electrical conductivity measurements of synthetic anorthite were carried out as a function of pressure and temperature by a Solartron-1260 Impedance/Gain phase analyzer in a multi-anvil apparatus. The impedance spectroscopy was performed in a frequency range from 10-1 Hz to 106 Hz. The sample was synthesized at 1673 K in a high temperature furnace. Our experimental results show that (1) a dramatic increase in electrical conductivity with increasing temperature and a slightly decrease in conductivity with increasing pressure at constant temperature, however, the effect of pressure on the conductivity is less pronounced than that of temperature; (2) the activation enthalpy linearly increases with increasing pressure (1.86-1.91 eV) reflecting the mobility of Ca2(+) decreases as the anorthite framework becomes more compressed; (3) the activation energy at atmospheric pressure and activation volume are 1.83 eV and 2.39 cm(3)/mol, respectively; (4) According to these Arrhenius parameters, it is proposed that the possible dominant mechanism of the charge transport in anorthite under experimental conditions is the hopping of Ca2(+) from one near aluminum oxygen site to another; (4) the diffusion coefficient of calcium was calculated from the present conductivity data using Nernst-Einstein equation, and compared with previous experimental results. |
| Keyword | Anorthite Electrical Conductivity Transport Mechanism Diffusivity |
| Subject Area | 地球深部物质与流体作用地球化学 |
| Indexed By | SCI |
| Language | 英语 |
| Document Type | 期刊论文 |
| Identifier | http://ir.gyig.ac.cn/handle/352002/6034 |
| Collection | 地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文 |
| Recommended Citation GB/T 7714 | Haiying Hu,Lidong Dai,Heping Li,et al. Temperature and pressure dependence of electrical conductivity in synthetic anorthite[J]. Solid State Ionics,2015,276(1):136-141. |
| APA | Haiying Hu,Lidong Dai,Heping Li,Keshi Hui,&Jia Li.(2015).Temperature and pressure dependence of electrical conductivity in synthetic anorthite.Solid State Ionics,276(1),136-141. |
| MLA | Haiying Hu,et al."Temperature and pressure dependence of electrical conductivity in synthetic anorthite".Solid State Ionics 276.1(2015):136-141. |
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