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Thermal and optical properties of La2O3–Ga2O3– (Nb2O5 or Ta2O5) ternary glasses
Journal of the American Ceramic Society ( IF 3.5 ) Pub Date : 2018-02-22 , DOI: 10.1111/jace.15484
Kohei Yoshimoto 1 , Atsunobu Masuno 2, 3 , Motoi Ueda 1 , Hiroyuki Inoue 3 , Hiroshi Yamamoto 1 , Tatsunori Kawashima 1
Affiliation  

La2O3–Ga2O3M2O5 (M = Nb or Ta) ternary glasses were fabricated using an aerodynamic levitation technique, and their glass‐forming regions and thermal and optical properties were investigated. Incorporation of adequate amounts of Nb2O5 and Ta2O5 drastically improved the thermal stabilities of the glasses against crystallization. Optical transmittance measurements revealed that all the glasses were transparent over a wide wavelength range from the ultraviolet to the mid‐infrared. The refractive indices of the glasses increased and the Abbe number decreased upon substituting Ga2O3 with Nb2O5, and the decrease in the Abbe number was significantly suppressed when Ta2O5 was incorporated into the glass. As a result, excellent compatibility between high refractive index and lower wavelength dispersion was realized in La2O3–Ga2O3–Ta2O5 glasses. Analysis based on the single‐oscillator Drude–Voigt model provided more systematical information and revealed that this compatibility was due to an increase in the electron density of the glass.

中文翻译:

La2O3–Ga2O3–(Nb2O5或Ta2O5)三元玻璃的热和光学性质

使用空气悬浮技术制造了La 2 O 3 –Ga 2 O 3M 2 O 5M = Nb或Ta)三元玻璃,并研究了它们的玻璃形成区域以及热和光学性能。掺入适量的Nb 2 O 5和Ta 2 O 5大大提高了玻璃的抗结晶性的热稳定性。光学透射率测量表明,所有眼镜在从紫外线到中红外的宽波长范围内都是透明的。当用Nb 2 O 5代替Ga 2 O 3时,玻璃的折射率增加而阿贝数减小,并且当将Ta 2 O 5掺入玻璃中时,阿贝数的降低被显着抑制。结果,在La 2 O 3 -Ga 2 O 3中实现了高折射率与较低波长色散之间的优异兼容性。–Ta 2 O 5眼镜。基于单振子Drude-Voigt模型的分析提供了更系统的信息,并表明这种相容性是由于玻璃的电子密度增加所致。
更新日期:2018-02-22
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