重金属ガリウム酸塩ガラスの光学特性に及ぼすPbO, Bi_2O_3及びTl_2Oの置換効果

概要

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The effects of composition on refractive index, density, glass transition temperature, and ultaviolet-visible and infrared transmissions were studied for gallate glasses containing a large amount (80 mol%) of PbO, Bi_2O_3 and Tl_2O. The resonance wavelengths of Pb^<2+>Bi^<3+> and Tl^+ were determined from the reflection spectra of gallate glasses. The refractive indexes of gallate glasses were measured down to the fourth decimal in the wavelength range of 480 nm to 1710 nm using the minimum deviation method. Refractive index in the system Bi_2O_3-PbO-Ga_2O_3 increases as PbO is substituted for Bi_2O_3. Refractive index in the systems Tl_2O-PbO-Ga_2O_3 and Tl_2O-Bi_2O_3-Ga_2O_3 increases as Tl_2O content increases. Factors affecting the refractive index of heavy metal gallate glasses are discussed by using the single-oscillator Drude-Voigt equation.
社団法人日本セラミックス協会の論文
1995-04-01