Bi2O3-B2O3-TiO2系统玻璃的形成能力研究

Research on Glass Formation Regions of Bi2O3-B2O3-TiO2 Systems

采用传统的玻璃熔融方法，研究了Bi2O3-B2O3-TiO2-RmOn四元系统的玻璃形成区（RmOn分别为La2O3、Sb2O3、ZrO2、SiO2和Nb2O5氧化物），给出了上述四元系统的玻璃形成范围。研究发现：Bi2O3-B2O3-TiO2-La2O3系统的玻璃形成范围最大，当TiO2的摩尔含量超过25％时，上述五个系统均不能形成玻璃。分剐熔制了摩尔分数55Bi2O3-35B2O3—5TiO2—5RmOn的玻璃（RmOn分别为La2O3、Sb2O3、ZrO2、SiO2和Nb2O5），测定了其红外吸收光谱、密度队转变温度Tg、析晶开始温度Tg。初步研究结果表明：Bi2O3-B2O3-TiO2-La2O3系统可作为具有性能优良非线性光学玻璃和光纤的理想基质材料。

The method of conversional melting glass are used to study the glass formation regions of Bi2O3-B2O3-TiO2-RmOn quaternion systems （RmOn is La2O3, Sb2O3, ZrO2, SiO2, and Nb2O5 oxide, respectively）, the glass formation regions of the quaternion systems are achieved. We can find that the Bi2O3-B2O3-TiO2-La2O3 system has the largest glass formation region and when the mole content of TiO2 overstep 25 %, glasses can＇ t be formed in all the five systems above. Glasses with compositions of 55Bi2O3-35B2O3-5TiO2-5 RmOn （RmOn is La2O3, Sb2O3, ZrO2, SiO2, and Nb2O5 oxide, respectively） are prepared by conversional melting method. And their IR absorption spectra, densities, transition temperatures, and crystallization onset temperatures are measured respectively. The result indicates that the Bi2O3- B2O3-TiO2-La2O3 system can be used as potential material for highly third-order nonlinear glasses and fibers.