Al_(1.49)Si_(1.45)Zr_(0.26)(TiCa Mg)_(0.37)O_(6.43)非晶的非等温晶化动力学  

Non-isothermal crystallization kinetics on Al_(1.49)Si_(1.45)Zr_(0.26)(TiCa Mg)_(0.37)O_(6.43)amorphous bulk

作　　者：梁叔全[1] 李少强[1] 谭小平[1] 唐艳[1] 张勇[1] 

机构地区：[1]中南大学材料科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2005年第9期1358-1362,共5页The Chinese Journal of Nonferrous Metals

基　　金：国家高技术研究发展计划资助项目(2003AA332040)

摘　　要：采用非等温差示扫描量热分析方法,结合X射线衍射和红外光谱,研究了Al1.49Si1.45Zr0.26(TiCaMg)0.37O6.43非晶晶化动力学.结果表明:非晶在1223～1273 K附近发生了四方氧化锆的析出反应,析晶活化能为518～538 kJ/mol;在1423～1473 K附近发生了莫来石和方石英的析出反应,其析晶活化能为522～545 kJ/mol,且氧化锆的存在能有效地降低莫来石的析晶活化能.The non-isothermal crystallization kinetics of the Al1. 49Si1. 45 Zr0. 26 （TiCaMg）0.37O6.43 glass was investigated by differential scanning calorimetry（DSC）, infrared spectra（IR） and X-ray diffractrometry（XRD）. The results show that there are two kinds of crystallization reactions during the heat treatment for Al1.49Si1.45Zr0.26 （TiCaMg）0.37O6.43 glass. The first crystallization reaction occurs at 1 223 - 1 273 K and the tetragonal zirconia oxide forms, the crystallization activation energy is 518 - 538 kJ/mol. The second crystallization reaction occurs at 1 423 - 1 473 K. The main phases precipitated are mullite and cristobalite, the crystallization activation energy is 522 - 545 kJ/mol. The zirconia oxide existence can decrease the crystallization activation energy of mullite effectively.

关 键 词：氧化锆 莫来石 晶化 动力学 活化能 

分 类 号：TQ171[化学工程—玻璃工业]