The electrical conductivity of H2O at 0.21– 4.18 GPa and 20–350°C
The electrical conductivity of H2O at 0.21– 4.18 GPa and 20–350°C
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H2O 在 0.21–4.18 GPa 和 20–350°C 下的电导率
DOI：
10.1007/bf02882610
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发表时间：
1997
影响因子：
--
通讯作者：
Yueming Zhang
中科院分区：
文献类型：
--
作者：
Hai;Hongsen Xie;Yousheng Xu;Maoshuang Song;Jie Guo;Yueming Zhang
在0.21 ~ 4.18 GPa和20 ~ 350℃条件下，测定了H2O的固液相电导率。结果表明：(1)固体中不同相的H2O的电导率与温度、压力的关系不同。电导率随温度的变化呈连续变化，但随压力在2.11 ~ 2.58 GPa之间呈非连续变化，对应于冰（VI）与冰（VII）之间的相变压力；(2)液体中H2O的电导率随温度和压力的增加而增加，但在0.57 ~ 0.9 GPa和2.11 ~ 2.58 GPa之间存在不连续，这也与冰(冰（V)、冰（VI）和冰（VII））的多态一致。这反映了不同压力下液体中的H2O具有截然不同的电子化学性质。这可能是造成地壳和上地幔具有高导电性和低速度层的重要原因。
The electrical conductivity of H2O in solid and liquid phases has been measured at 0.21–4.18 GPa and 20–350°C. The results indicate: (I) different phases of H2O in solid have different relations between electrical conductivity and temperature and pressure. The conductivity changes continuously with temperature, but discontinuously with the pressure between 2.11 and 2.58 GPa, which corresponds to the transforming pressure between ice (VI) and ice (VII);(II) the amductivity of H2O in liquid all increases with temperature and pressure, but there are discontinuities at pressures between 0.57 and 0.9 GPa, and between 2.11 and 2.58 GPa, which are also consistent with the polyrnorph of ice (ice (V), ice (VI) and ice (VII)). This reflects that H2O in liquid at different pressures has quite different properties of electron chemistry. It is probably the important reason that causes the layers with high electrical conductivity and low velocity in the earth’s ceust and upper mantle.