結晶性アルミノシリケートの屈折率におよぼすアルミニウム含有量の影響

概要

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Crystalline aluminosilicates with low refractive index were synthesized by diminishing the aluminum content in A type zeolite composition. Concentration of Na_2O in the Al-solution played an important role in the crystallization of the zeolites with low index of refraction. The linear relation-ship between the indices of refraction and the Al/Si molar ratios of synthesized crystalline aluminosilicates was obtained as : n = 1.419+0.0457 (Al/Si), where n is refractive index. The lowering in refractive index led to , linear decrease of the turbidity of water-ethanol suspension containing the zeolite. Electron microscopy and selected area electron diffraction patterns showed cubic structure with a_0 = 12.21A at the Al/Si ratio = 0.7. Particle diameter of the zeolites was in the range of 0.6 to 0.9 μm on the average. The values of cation exchange capacity slightly smaller than that of A type zeolite were obtained.
日本粘土学会の論文
1987-03-01