稀土掺杂对ZnO-B2O3-SiO2玻璃热稳定性及结构的影响

为了探索镧系与非镧系元素对ZnO-B₂O₃-SiO₂系统玻璃热稳定性及结构的影响, 本研究采用差示扫描量热仪(DSC)和傅立叶变化红外光谱仪(FTIR)开展了La₂O₃和Y₂O₃掺杂对该系统玻璃析晶行为、热稳定性和结构变化的系统研究。结果表明: 当La₂O₃掺杂量大于8mol%、Y₂O₃掺杂量大于6mol%时, 60ZnO-30B₂O₃-10SiO₂系统玻璃开始出现析晶现象; 当La₂O₃掺杂量为4mol%、Y₂O₃掺杂量为2mol%时, 该玻璃的热稳定性能最好。结构研究表明, 少量添加稀土氧化物会使该系统玻璃的网络链接程度提高, 而当掺杂量超过一定量时会使该系统玻璃的网络链接程度降低。

Effect of Rare Earth Dopant on Thermal Stability and Structure of ZnO-B2O3-SiO2 Glass

To investigate the effect of the lanthanides and non-lanthanides elements on the thermal stability and structure of ZnO-B₂O₃-SiO₂ glass, the crystallization behavior, thermal stability and structural changes of ZnO-B₂O₃-SiO₂ glass doped with La₂O₃ and Y₂O₃ were characterized by the differential scanning calorimetry (DSC) and Fourier Transform Infrared spectroscope (FTIR). The results showed that when the La₂O₃ and Y₂O₃ additions are more than 8mol% and 6mol%, respectively, the 60ZnO-30B₂O₃-10SiO₂ glass system begins to crystallize. When La₂O₃ and Y₂O₃ additions are 4mol% and 2mol%, respectively, this glass is of the best thermal stability. According to the structure research, the network linking performance of this kind of glass can be improved by a small amount addition of rare earth oxide. In contrast, the network linking performance of this kind of glass can be decreased by rare earth oxide’s addition exceeding a certain threshold value.