アンチモンガラスの赤外吸収

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It was confirmed that the area of the glass forming region of the system Sb_2O_3-Al_2O_3-R_2O (Na_2O+K_2O) increases with the addition of SiO_2 or GeO_2. The glasses containing 5% SiO_2 or GeO_2 melted under oxidizing condition (o. glass) gave a different infrared transmission from those melted under neutral condition (n. glass). Also the difference in such properties as the color, density, softening point, and density were observed . O. glass has better infrared transmittance and chemical durability than n. glass which gave broad absorption band between 750 and 1000 cm^-1 and 1520cm^-1. These two absorption bands at 1420 cm^-1,and sharp absorption bands at 1420 and 1520cm^-1. These absorption bands at 1420 and 1520cm^-1 appeared when o. glass is devitrified. AlSbO_4 crystal has the absorption band at 1420 cm^-1. After heating with Na_2O the crystal gave a broad absorption band between 750 and 1000cm^-1. It was, therefore, concluded that n. glass contains the crystallite region, and the chain segments composed of Al^3+Sb^5+O tetrahedra are built up more easily in o. glass than in n. glass ; also it may be assumed that SiO_2 or GeO_2 bridges the chain segment of AlSbO_4 tetrahedra. [Received January 19,1962]
社団法人日本セラミックス協会の論文
1962-06-01