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本文进行了硼酸锂系列晶体的高压拉曼散射及其压致相变的研究。对于三硼酸锂（ＬｉＢ３Ｏ５），我们发现在５．０ＧＰａ有一可逆的晶态到晶态的相变，在２７．０ＧＰａ有一不可逆的晶态到非晶态的相变。二硼酸锂（Ｌｉ２Ｂ４Ｏ７）不可逆压致非晶相变发生在３２．０ＧＰａ附近。对于一硼酸锂，我们研究了０—５５．８ＧＰａ范围内的高压拉曼光谱，只在２．０ＧＰａ发现了一个晶态到晶态的相变，但未发现不可逆压致非晶化现象。在硼酸锂系列晶体中，不可逆压致非晶化的压力随Ｌｉ２Ｏ的含量的增加而升高。硼酸锂晶体中Ｌｉ２Ｏ的含量越高，压致非晶化越不容易发生，这与熔体急冷法制备硼酸锂玻璃的规律是一致的。
In this paper, the high-pressure Raman scattering of lithium borate crystals and its pressure-induced phase transition were studied. For lithium triborate (LiB3O5), we found a reversible crystalline-to-crystalline phase transition at 5.0 GPa and an irreversible crystalline-to-amorphous phase transition at 27.0 GPa. The irreversible bulk amorphous phase transition of lithium diboride (Li2B4O7) occurred near 32.0 GPa. For lithium borate, we studied the high-pressure Raman spectra in the range of 0-55.8 GPa, and found a crystalline-to-crystalline phase transition only at 2.0 GPa, but no irreversible pressure-induced amorphization was observed. In lithium borate crystals, the pressure of irreversible pressure amorphization increases with the increase of Li2O content. The higher the content of Li2O in lithium borate crystals, the less likely to occur by pressure-induced amorphization, which is consistent with the law of melt-quenching lithium borate glass.