High refractive index LaGaO3-TiO2 amorphous spheres prepared by containerless solidification

作者：Li, Ying; Zhang, Xiaoyan; Qi, Xiwei^*; Zhang, Min; Gu, Yaohang

来源：Materials Letters, 2018, 215: 148-151.

DOI：10.1016/j.matlet.2017.12.085

• Optical materials and properties
• Thermal analysis
• Containerless solidification
• Amorphous spheres

A series of amorphous spheres with nominal compositions of (1-x) LaGaO3-xTiO(2) (x = 0, 0.625, 0.650, 0.675, 0.700, 0.725, 0.740) have been successfully prepared by containerless solidification. It is found that the LaGaO3-TiO2 system has an extremely wide glass-forming region of 0.625 <= x <= 0.740; in this region, transparent amorphous spheres of diameter approximately 2-4 mm can be obtained. The maximum difference between T-g and T-x (Delta T = T-x - T-g) exceeds 80 degrees C. The as-prepared amorphous materials exhibit a high refractive index of 2.49 for x = 0.740 and a transmittance exceeding 70% in the visible light range. The refractive index can be tuned by adjusting the amount of TiO2. These findings show great promise for the application of LaGaO3-TiO2 systems as high refractive index materials and open up avenues for the exploration of novel potential optical components.

• 单位
  东北大学; 内蒙古科技大学