文献类型：期刊文献

英文题名：Kinetics of dehydration and desulfation process of titania coated mica

作者：Zhou, JH; Xiao, WD; Gu, YF; Gu, HC; Hu, LM

机构：[1]E CHINA UNIV SCI & TECHNOL,NATL ENGN RES CTR ULTRAFINE POWDER,SHANGHAI,PEOPLES R CHINA

年份：1997

卷号：18

期号：3

起止页码：439

外文期刊名：CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:A1997WN55800025)】；

语种：英文

外文关键词：mica titania; hydrated titania; process of dehydration and desulfation; reaction rate

摘要：Based on TG curve, the Freeman-Carroll method was applied to calculate the kinetic parameters of the process of dehydration and desulfation of hydrous titanium oxide film on the titania-coated mica pearl pigments. As a result, the kinetic parameters were obtained. The dehydration period: E = 93.32 kJ/mol, n = 5.16, A = 5.31 x 10(11) min(-1); desulfation period: E = 149.25 kJ/mol, n = 5.13, A = 2.75 x 10(11) min(-1). Simultaneously, comparing with the kinetic parameters of the hydrous tiania powder obtained under the same condition indicated that both the dehydroation process and the desulfation process were more difficult in pigments than in powder.