北京科技大学学报2011，Vol.33Issue(12)：1523-1528,6.
矿物棉纤维的非等温析晶动力学研究
Non-isothermal crystallization kinetics of mineral wool fibers
摘要
Abstract
The crystallization behavior of mineral wool was investigated by means of differential thermal analysis（DTA） and X-ray diffraction（XRD）.DTA curves reveal the presence of two overlap exothermic peaks and XRD results shows that two crystalline phases are separated out： one is akermanite-gehlenite（AlCa2Mg0.5O7Si1.5）,which was crystallized between 850℃ and 920℃;the other is anorthite（CaAl2Si2O8）,which was crystallized between 880℃ and 1010℃.The Ozawa method and the modified Kissinger method were used to analyze the crystallization mechanism and the activation energy of crystallization.For the crystalline of akermanite-gehlenite,the activation energy of crystallization and the Avrami exponent are 248kJ·mol-1 and 0.682 respectively,indicating surface crystallization;whereas for anorthite,the activation energy of crystallization is 347kJ·mol-1,revealing three-dimensionality of crystal growth according to the results of scanning electron microscopy（SEM）.关键词
矿物棉/析晶动力学/活化能/晶体生长Key words
mineral wool/crystallization kinetics/activation energy/crystal growth分类
化学化工引用本文复制引用
唐续龙,张梅,郭敏,张作泰,王习东..矿物棉纤维的非等温析晶动力学研究[J].北京科技大学学报,2011,33(12):1523-1528,6.基金项目
国家自然科学基金资助项目 （）
教育部新世纪优秀人才支持计划资助项目（NCET-07-0071 （）
NCET-08-0723） （）
国家重点基础研究发展计划资助项目 （）
