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本文指出,测量离子导体样品中心到两电极间电势差,根据它们之间的关系,可以判断载流子的荷电性质。将此法用于α-LiIO3单晶,并根据α-LiIO3为准一维导体,得知α-LiIO3中有两种载流子:一种为间隙Li+,它沿着c向的略有曲折的管导从一个间隙位跳跃到另一间隙位;另一种为Li空位,也沿着c向不断和格位Li交换位置。我们测量了α-LiIO3的从-100℃到室温的电导性质,结果与室温以上的情况相类似。In this paper, we have proposed a simple method to determine what charges the carriers in ionic conductor possess by analysing the relation of voltages between middle point of the sample and its two terminal surface electrodes. By using this method and considering that α-LiIO3 single crystal can be regarded as a quasi 1-dimension conductor, it has been found that there are two kinds of carriers in α-LiIO3 single crystal. One of them is the interstitial Li ion which hops among the intersites in a zigzag channel along c-axis. The other is the Li vacancy which exchanges positions with Li ions at lattice sites also along c-axis. We have measured the electrica conduction properties from -100℃ up to room temperature. The results are analogous to those obtained above room temperature.
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