バナジウム含有ガラスの着色に関する研究
1961 年 69 巻 789 号 p. 313-321
詳細
1961 年 69 巻 789 号 p. 313-321
For the purpose of throwing light on the action of transition elements in glass, and making clear the influences on coloration, the authors carried out the investigations on the coloration of vanadium containing glasses.
Using the base glasses of silicate, borate, and phosphate systems the coefficient of transparency between the wave lengths of 300-1, 100mμ were measured.
Four absorption bands, i.e. in ultraviolet region, 425-450, 625-710, and 900-1050mμ were observed. Systematic studies were carried out in order to know the change of absorption bands due to the variation of glass composition, vanadium content, melting temperature and atmosphere, and the condition of heat treatment, and the experimental results were interpreted in terms of the change of the valency of vanadium in glass.
A reversible color change was observed at a temperature between 200°-300°C, and the corresponding change of the coefficient of transparency was investigated. In vanadium containing glasses there may exist a mechanism like a lattice deffect under certain condition which is closely related to the reversible color change.
