| CaO-MgO-Al2O3-SiO2-F系可切削微晶玻璃的晶化机理研究 |
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| 引用本文： | 李红,冉均国,苟立.CaO-MgO-Al2O3-SiO2-F系可切削微晶玻璃的晶化机理研究[J].材料科学与工程学报,2002,20(1):28-30,10. |
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| 作者姓名： | 李红 冉均国 苟立 |
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| 作者单位： | 四川大学无机材料系,四川成都,610065 |
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| 摘 要： | 在CaO MgO Al2 O3 SiO2 F系可切削微晶玻璃体系中 ,本研究分析了K2 O和ZrO2 对玻璃析晶和显微结构的影响 ,探讨了晶化机理。K+ 促使云母相的生成和球晶的形成 ;晶化过程中 ,云母和顽辉石互为外延生长 ,使球晶中条状晶解离为片状晶。ZrO2 与F- 一起促使玻璃晶化后形成棒状云母晶粒 ,并具有晶粒长径比大、相互交错的显微结构
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| 关 键 词： | 可切削微晶玻璃 析晶 显微结构 |
| 文章编号： | 1004-793(2002)01-0028-03 |
| 修稿时间： | 2001年7月25日 |
Study on Crystallization of Machinable Glass-ceramics in the CaO-MgO-Al2O3-SiO2-F System |
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| LI Hong,RAN Jun\|guo,GOU Li.Study on Crystallization of Machinable Glass-ceramics in the CaO-MgO-Al2O3-SiO2-F System[J].Journal of Materials Science and Engineering,2002,20(1):28-30,10. |
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| Authors: | LI Hong RAN Jun\|guo GOU Li |
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| Abstract: | The effect of K 2O and ZrO 2 on crystallization and microstructure in the machinable glass ceramic system of CaO MgO Al 2O 3 SiO 2 F were investigated and also,the mechanism of crystallization of the parent glass was discussed in detail.It could be concluded that K + promotes mica precipitate,and spherulite occurred in the sample added K 2O.The mica and enstatite grew expitaxilly while glass crystallized,meanwhile strip like aggregation dissolved into flake like one in the spherulite.ZrO 2 resulted a bulk crystallization with F -.The glass ceramics with added ZrO 2 and K 2O possessed typical machinable microstructure,in which the mica phases showed a micro morphology with a large aspect ratio,rod shaped and interlocking after crystallization. |
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| Keywords: | machinable glass ceramics crystallization microstructure |
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