In situ control of oxygen fugacity experimental study on the crystallographic anisotropy of the electrical conductivities of diopside at high temperature and high pressure.
文献类型：期刊论文
| 作者 | Dai, LD; Li, HP; Liu, CQ; Su, GL; Cui, TD |
| 刊名 | Acta petrologica sinica
 |
| 出版日期 | 2005-11-01 |
| 卷号 | 21期号:6页码:1737-1742 |
| 关键词 | Diopside High temperature and high pressure Electrical conductivity Oxygen fugacity Anisotropy Small polaron |
| ISSN号 | 1000-0569 |
| 通讯作者 | Dai, ld(dailidong717@hotmail.com) |
| 英文摘要 | At 1.0 similar to 4.0 gpa and 1073 similar to 1373 k and under the control of oxygen fugacity a yj-3000t cubic-anvil solid high-pressure apparatus and a sarltron-1260 bripedance/gain-phase analyzer were eulployed to conduct an in-situ measurement of the electrical conductivity of diopside along the different crystallographic directions. the solid buffering agents ni + nio were selected to control over oxygen fugacity. the experimental results indicate that: (1) within the range of experimentally selected frequencies, either as viewed from the relationship between the module of complex impedance and the frequency or from that between the phase angles and the frequency, it can be seen clearly that electrical conductivity is of strong dependence on frequency; (2) with the rise of temperature, the impedance tends to decrease but the electrical conductivity tends to increase. the arrenhius linear formula is fitted between logor and 1/t; (3) with the rise of pressure, the electrical conductivity along the [001] crystallographic direction tends to decrease, as well as the activation enthalpy and the pre-exponential factors tend to decrease. it is the first time that we have obtained the activation energy and activation volume of the main current carriers in the diopside samples, which are 1.80 0.04, ev and 0.035 0.015 cm(3)/mol, respectively; (4) under given pressure and temperature, the electrical conductivity and the pre-exponential factors tend to decrease according to the crystallographic directions of the [001], [100] and [010] diopside, while the activation enthalpy tends to increase. there exists the electric characteristic anisotropy of the diopside sample at high pressure; and (5) the mechanism of electric conduction of small polarons in diopside samples has provided a reasonable explanation to the behaviour of electrical conductivity under high temperature and high pressure. |
| WOS关键词 | LABORATORY MEASUREMENTS ; OLIVINE ; PYROXENE ; MANTLE ; RINGWOODITE ; MINERALS |
| WOS研究方向 | Geology |
| WOS类目 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000234692900021 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2377886 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Dai, LD |
| 作者单位 | 1.Chinese Acad Sci, Inst Geochem, Lab Earths Interior Mat & Fluid Geochem, Guiyang 550002, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.Univ Guizhou, Guiyang 550004, Peoples R China |
| 推荐引用方式 GB/T 7714 | Dai, LD,Li, HP,Liu, CQ,et al. In situ control of oxygen fugacity experimental study on the crystallographic anisotropy of the electrical conductivities of diopside at high temperature and high pressure.[J]. Acta petrologica sinica,2005,21(6):1737-1742. |
| APA | Dai, LD,Li, HP,Liu, CQ,Su, GL,&Cui, TD.(2005).In situ control of oxygen fugacity experimental study on the crystallographic anisotropy of the electrical conductivities of diopside at high temperature and high pressure..Acta petrologica sinica,21(6),1737-1742. |
| MLA | Dai, LD,et al."In situ control of oxygen fugacity experimental study on the crystallographic anisotropy of the electrical conductivities of diopside at high temperature and high pressure.".Acta petrologica sinica 21.6(2005):1737-1742. |
入库方式： iSwitch采集
来源：中国科学院大学
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。