| 云母微晶玻璃等温转变动力学的研究 |
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| 引用本文： | 程慷果,万菊林,梁开明.云母微晶玻璃等温转变动力学的研究[J].无机材料学报,1997,12(2):149-155. |
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| 作者姓名： | 程慷果 万菊林 梁开明 |
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| 作者单位： | 清华大学材料科学与工程系!北京，100084，清华大学材料科学与工程系!北京，100084，清华大学材料科学与工程系!北京，100084 |
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| 摘 要： | 本文对以ＴｉＯ２为晶核剂的云母微晶玻璃等浊析晶转变进行了研究，发现玻璃的差热分析曲线上出现了两个析晶放热峰。Ｘ光衍射分析表明，在这两个析晶峰温度下从玻璃中分析析出钛酸镁和云母晶体。
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| 关 键 词： | 云母 玻璃 折晶 动力学 微晶玻璃 |
| 收稿时间： | 1996-2-14 |
| 修稿时间： | 1996-3-26 |
Study on Isothermal Crystallization Kinetics of Mica Glass Ceramics |
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| CHENG Kangguo,WAN Julin,LIANG Kaiming.Study on Isothermal Crystallization Kinetics of Mica Glass Ceramics[J].Journal of Inorganic Materials,1997,12(2):149-155. |
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| Authors: | CHENG Kangguo WAN Julin LIANG Kaiming |
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| Affiliation: | Department of Materials Science Enaineecring Tsinghua University Beijing 100084 China |
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| Abstract: | The isothermal crystallization kinetics of mica-containing glass ceramics with addition of TiO2 asnucleation agent was investigated by XRD, SEM and DTA. Two distinct crystallization exotherm peaksin the DTA curve were observed and resolved corresponding to the initial formation of MgTi2O5,followed by the formation of KMg3AlSi3O10F2, confirmed by X-ray diffeaction analysis (XRD). By usingJohnson-Mehl-Avrami equation, the activation energics for precipitation of MgTi2O5 and mica crystalswere enaluated and the crystallization mecjanism of mica was analyzcd. The results indicated that thegrowth of KMg3AlSi3O10F2 is a two-dimensional process, controlled by the crystal-glass interface reaction.The average values of activation energies are 242kJ/mol and 265kJ/mol corresponding to that of MgTi2O5and mica crystalized out of the glass, respectively |
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| Keywords: | mica glass crystalization kinetics phase separation growth mechanism |
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