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本文报道了非晶态离子导体Li2B2O4的7Li核磁共振研究。测量了7Li核磁共振谱与温度的关系。实验中发现,Li2B2O4的晶态、非晶态和部分晶化样品的7Li核磁共振谱有很大的不同,且在部分晶化样品的7Li核磁共振谱上有附加的小峰,它与LiCl(Al2O3)的7Li核磁共振谱上附加的小峰相类似。我们也对非晶态离子导体B2O3-0.7Li2O-0.7LiCl进行了7Li核磁共振研究,其结果与上面的类似。研究结果表明,它们都起因于非晶母体与微晶的界面效应。In order to understand the mechanism of the ionic conductivity enhancement during pre-crystallization process, we have performed 7Li NMR investigations on amorphous ionic conductor Li2B2O4. The temperature dependence of 7Li NMR spectra is studied. It is found that 7Li NMR spectra in crystalline, amorphous samples and amorphous sample with small amounts of crystallites are very different from each other. An additional peak is observed to overlap 7Li NMR absorption line on amorphous sample with small amounts of crystallites. This phenomenon is similar to that in LiCl (or LiI) containing dispersed secondphase particles. 7Li NMR investigations on amorphous ionic conductor B2O3-0.7Li2O-0.7LiCl is also made, the results are similar to that mentioned above. It is concluded that they are all caused by the interfacial effect between amorphous matrix and the crystallites.
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