| K_2O对R_2O-CaO-SiO_2-F微晶玻璃析晶的影响 |
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| 引用本文： | 程金树,邓炜,郑伟宏,宋树欣. K_2O对R_2O-CaO-SiO_2-F微晶玻璃析晶的影响[J]. 武汉理工大学学报, 2010, 0(8) |
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| 作者姓名： | 程金树 邓炜 郑伟宏 宋树欣 |
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| 作者单位： | 武汉理工大学硅酸盐材料工程教育部重点实验室; |
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| 摘 要： | R2O-CaO-SiO2-F系统微晶玻璃的析晶过程较为复杂,析出晶体种类繁多。为得到预期的晶相,获得最佳性能,需要对整个析晶过程进行合理控制。因此采用DTA、XRD、SEM等测试分析方法,研究K2O引入量对R2O-CaO-SiO2-F系统微晶玻璃的析晶温度、主晶相、晶体含量以及微观形貌的影响。研究结果表明:随着K2O引入量的增加,玻璃转变点温度降低,而最大析晶峰温度升高。当K2O引入量为质量分数5%左右时,微晶玻璃的主晶相为颗粒状的氟化钙和柱状的硬硅钙石,晶体含量为15%。当氧化钾质量由6%增加到8%时,微晶玻璃主要析出放射状a-硅碱钙石,次晶相为少量的氟化钙,晶体含量增大到40%。
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| 关 键 词： | 微晶玻璃 硅碱钙石 氧化钾 析晶 |
Effect of K_2O Content on Crystalization of R_2O-CaO-SiO_2-F Glass-ceramics |
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| CHENG Jin-shu,DENG Wei,ZHENG Wei-hong,SONG Shu-xin. Effect of K_2O Content on Crystalization of R_2O-CaO-SiO_2-F Glass-ceramics[J]. Journal of Wuhan University of Technology, 2010, 0(8) |
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| Authors: | CHENG Jin-shu DENG Wei ZHENG Wei-hong SONG Shu-xin |
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| Affiliation: | CHENG Jin-shu,DENG Wei,ZHENG Wei-hong,SONG Shu-xin(Key Laboratory of Silicate Materials Science , Engineering of Ministry of Education,Wuhan University of Technology,Wuhan 430070,China) |
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| Abstract: | The crystallization of R2O-CaO-SiO2-F system glass-ceramics was complicated and resulted in various phases.It was necessary to control the crystallization to obtain the reasonable crystalline phase and the excellent properties.In this work,the influence of K2O content on the crystallization and microstructure was investigated by DTA,XRD and SEM.The results showed that the increase of K2O addition resuled in the reduction of the glass transition temperature and the enhancement of the crystallization temperat... |
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| Keywords: | glass-ceramics canasite potassium oxide crystallization |
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