J. Mater. Sci. Technol. ›› 2006, Vol. 22 ›› Issue (02): 211-214.

• 论文 • 上一篇    下一篇

Crystallization Kinetics of Nanophase Glass-Ceramics as Magnetic Disk Substrate

姜盛瑜;张建成;顾峰;沈悦;王华   

  1. 上海大学
  • 收稿日期:2004-11-04 修回日期:2005-04-22 出版日期:2006-03-28 发布日期:2009-10-10
  • 通讯作者: Jiancheng ZHANG

Crystallization Kinetics of Nanophase Glass-Ceramics as Magnetic Disk Substrate

Shengyu JIANG, Jiancheng ZHANG, Feng GU, Yue SHEN, Hua WANG   

  1. College of Material Science and Engineering, Shanghai University, Shanghai 200072, China
  • Received:2004-11-04 Revised:2005-04-22 Online:2006-03-28 Published:2009-10-10
  • Contact: Jiancheng ZHANG

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摘要： 本文研究了包含纳米β-石英相为主晶相基于SiO2–Al2O3–Li2O–K2O–MgO–ZnO系统的微晶玻璃作为高容量磁存储器基片的应用．制备好的母体玻璃在一定温度下核化晶化３到４个小时，研究了晶化动力学．晶粒大小由谢乐公式和透射电镜图象来估算．结果显示：Avrami常数为3.88，活化能为189.7kJ/mol,晶粒大小为30-60nm.晶粒分布，纳米晶形貌等具体显微结构由透射电镜，Ｘ射线衍射，差热分析表征．同时讨论了微结构与机械性能之间的关系．

关键词: 微晶玻璃, 动力学, 磁盘基片

Abstract: Glass-ceramics containing β-quartz as a main crystal phase based on the system of SiO2-Al2O3-Li2O-K2O-MgO-ZnO were investigated for the application to magnetic storage substrate for higher storage capacity. Parent glasses were prepared, then nucleated and crystallized at certain temperatures for 3~4 h. The crystallization kinetics of glass-ceramics was also studied. The grain size was estimated by Scherrer formula and image treatment of transmission electron microscopy (TEM). The results π showed that the Avrami exponent was determined to be 3.88, the activation energy 189±7 kJ/mol and the grain size 30~60 nm. A detailed microstructure of the glass-ceramics, including grain distribution and the morphology of nano-crystalline was characterized by TEM, X-ray diffraction (XRD), differential scanning calorimeter (DSC), differential thermal analysis (DTA). The relationship between microstructure and mechanical properties was also discussed.

Key words: Glass-ceramics, Kinetics, Disk substrate