非等温晶化动力学
(中南大学材料科学与工程学院, 长沙 410083)
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。
关键字: 氧化锆; 莫来石; 晶化; 动力学; 活化能
Al1.49Si1.45Zr0.26(TiCaMg)0.37O6.43
amorphous bulk
（School of Materials Science and Engineering, Central South University,
Changsha 410083, China）
Abstract: The non-isothermal crystallization kinetics of the Al1.49Si1.45Zr0.26(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 1223-1273 K and the tetragonal zirconia oxide forms, the crystallization activation energy is 518-538 kJ/mol. The second crystallization reaction occurs at 1423-1473 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.
Key words: zirconia oxide; mullite; crystallization; kinetics; activation energy
