モルデナイトの加熱処理による2.3の物理化学的特性の変化 : 交換性陽イオンの影響

概要

論文の詳細を見る
The effect of exchangeable cations on some physicochemical properties of mordenite by heat treatment was studied by the x-ray diffraction method and the measurement of specific surface area. Synthetic mordenite and mordenitic tuff from Shiroishi Miyagi Pref. were used as starting materials, from which Na-, Ca- and NH_4-mordenite were prepared by cation exchange treatment. The thermal stability of mordenite is different with exchangeable cations contained. The NH_4-form is most stable and its structure remains unchanged up to 900℃. The structures of Na-and Ca-form are stable up to 800℃, but they are broken at 900℃. The specific surface area of NH_4-mordenite decreases gradually with increasing temperature and it corresponds to the structral change. Though the structures of Na- and Ca- mordenite are stable up to 800℃, the specific surface area decreases remarkably. It is because that partial sintering occurs with heat-treatment so that the pore is blocked and nitrogen molecules are not adsorbed in the main channel.
日本粘土学会の論文
1970-09-15