合成ナトリウムゼオライトの示差熱曲線におよぼす結晶化度の影響

抄録

Differential thermal analysis was carried out on synthesized zeolite to examine the relationship between the thermal properties and differential thermal curves of the crystal and the degree of crystallization. X-and P-type zeolites became amorphous first and then changed into nepherine at above 1000°. With the exception of P-type zeolite, crystal structure of all A-type, X-type, and analcite was not destroyed up to 800°. A correlation was found between the transition peak area and degree of crystallization. There is a proportionality between the dehydration peak area and water content. Some of the X-type zeolite showed two peaks in the dehydration differential thermal curve. These two peaks were considered to be due to the liberation of water from the water of crystallization and water adsorbed on the gel, and it was found possible to calculate the degree of crystallization from the ratio of the height of two peaks.