锗酸盐晶体压致非晶化的研究

高压拉曼散射研究表明．ＣｕＧｅＯ３，Ｌｉ２ＧｅＯ３和Ｌｉ６Ｇｅ２Ｏ７三种晶体分别在７，１２和１１ＧＰａ压力下转变为非晶。在高于起始转变压力以上一定范围压致非晶是可逆的，ＣｕＧｅＯ３，Ｌｉ２ＧｅＯ３和Ｌｉ６Ｇｅ２Ｏ７压致非晶的不可逆转变压力分别为１４．１，２０和２０ＧＰａ。压致非晶ＣｕＧｅＯ３的重新晶化温度在６００℃附近。锗酸及系列晶体的压致非晶化与它们的成份和结构有关，随着在这一系列晶体中Ｌｉ２Ｏ含量的增加，压致非晶化的压力趋于减小。

^Research on Pressure-Induced Amorphization of Germanate Crystals

High - pressure Raman scattering measurements reveal that the crystalline CuGeO3,Li2GeO3 and Li,Gi6Ge2O7 transform into the amorphous state at 7, 12 and 11 GPa, respectively. The pressure induced amorphization is reversible up to a certain pressure above the transition pressure. The pressures at which irreversible pressure-induced amorphitation occurs are 14. 1,20,and 20GPa for CuGeO3,Li2GeO3 and Li6Ge2O7 respectively. The recrystallization temperature of pressure-induced amorphous CuGeO3 is about 600℃.The pressure-induced amorphization of the series of lithium germantecrystals are closelyrelated to their compositions and structures. The amorphization transition pressure decreases with increasing content of Li2O in the crystals.