抄録
An attempt was made to synthesize zeolite-like crystals hydrothermally and to study its physicochemical properties. The hydrothermal reaction was effected by the use of silica sol or sodiumm metasilicate for silicon source, sodium aluminate solution or aluminum hydroxide sol for aluminum source, and sodium hydroxide solution for alkali metal source. To study the crystallization products, optical microscope, X-ray powder diffraction method, infrared absorption spectra, and refractive index measurement were used. It was concluded that crystallization can be effected by a method different from that known in the literature, by using the mixture of solutions instead of dry gel as the starting material, or by using sodium metasilicate solution or aluminum hydroxide sol, and at the temperature lower than 100°.
