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.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
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)
关键词
氧化锆
莫来石
晶化
动力学
活化能
zirconia oxide
mullite
crystallization
kinetics
activation energy
