La₂O₃–Ga₂O₃–M₂O₅ (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：

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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 ₃ – M ₂ O ₅（M = 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。