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《Journal of University of Science and Technology Beijing》 2011-12
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Non-isothermal crystallization kinetics of mineral wool fibers

TANG Xu-long 1),ZHANG Mei1),GUO Min1),ZHANG Zuo-tai2),WANG Xi-dong2) 1) School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China 2) College of Engineering,Peking University,Beijing 100871,China  
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).
【Fund】: 国家自然科学基金资助项目(50874013);; 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(2007CB613608)
【CateGory Index】: TQ343.4
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1 WAN Wei-tao~(1,2),YU De-mei~(1,2),GUO Xiu-sheng~(1,2),HUANG Long-biao~1,MAO Zhan-tong~1,CAO Ji-ping~3(1.Department of Applied Chemistry;2.State Key Laboratory of ElectricalInsulation for Power Equipment,Xi′an Jiaotong University,Xi′an 710049,China;3.Research Institute of Modern Chemistry,Xi′an 710065,China);NONISOTHERMAL CRYSTALLIZATION BEHAVIOR OF POLY(BUTYLENE TEREPHTHALATE)/GLASS FIBER /NANO-Al_2O_3 COMPOSITES——(Ⅱ) CRYSTALLIZATION KINETICS[J];Polymer Materials Science & Engineering;2006-03
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