硼酸塩および珪酸塩ガラス中のクロムの分光特性

概要

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Optical absorption spectra have been obtained on Cr^<3+> in alkali borate, alkali silicate and alkaline earth borate glasses. The assignments for bands ν_1〜ν_5 were made on the basis of octahedrally coordinated Cr^<3+> in the glasses and their band positions were determined. The values of three parameters, namely the crystal field strength, Dq, the Racah B and Racah C parameters, were calculated. The results indicate that ; (1) Dq value of alkali borate glasses increases with increasing concentration of alkali oxide up to about 15 mole % but it changes anomalously in the composition range of 15〜20 mole %. (2) Dq value of alkaline earth borate glasses increases with increasing concentration of alkaline earth oxide. (3) On the contrary, in alkali silicate glasses the value decreases with increasing alkali oxide content. (4) As for the effect of king of ion an increase of Dq value of the glass is in the order Li_2O >Na_2O>K_2O and CaO>SrO>BaO for the same molar concentration of the oxide.
社団法人日本材料学会の論文
1973-06-15