采用熔融烧结法,引入一定量的MgF2,制备出LMASF系微晶玻璃,采用DTA、XRD对该微晶玻璃的析晶温度和物相组成进行了分析,并采用SEM观察了微晶玻璃的断面形貌.讨论了热处理对微晶玻璃析晶的影响,并对其晶化行为和微观形貌进行了研究.实验结果表明,该微晶玻璃首先析出LixAlx Si1-xO2晶体,后随着温度的升高析出β-锂辉石晶体;最佳晶化温度为786℃,在该温度下保温2h,析出棒状β-锂辉石晶体,晶体长度为2～5μm,长径比较大.
By adding a certain amount of MgF2 in the raw materials, LMASF glass-ceramic is prepared by the melting-sintering method. The crystallization temperature, phase compositions and the surface topography are investigated by DTA, XRD and SEM, the influence of heating-treatment on its crystallization is discussed, the crystallization behaviors and the micro morphology are also analyzed. The results show that the optimum crystallization condition is insulating 2h at 786℃. Based on this condition,massive rod-shape β-spodumene with fine length-diamete ratio is abtained,and its length is 2～5μm.
参考文献
| [1] | 赵莹;陆雷;张乐军 等.锂铝硅系统微晶玻璃的析晶及热处理工艺的研究[J].材料导报,2007,21(专辑Ⅸ):353. |
| [2] | L. ARNAULT;M. GERLAND;A. RIVIERE .Microstructural study of two LAS-type glass-ceramics and their parent glass[J].Journal of Materials Science,2000(9):2331-2345. |
| [3] | Riello P.;Comelato N.;Polizzi S.;Verita M.;Fagherazzi G. Hofmeister H.;Hopfe S.;Canton P. .Nucleation and crystallization behavior of glass-ceramic materials in the Li2O-Al2O3-SiO2 system of interest for their transparency properties[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2001(1/3):127-139. |
| [4] | Luisa Barbieri;Cristina Leonelli;Tiziano Manfredini .Nucleation and crystallization of a lithium aluminosilicated glass[J].Journal of the American Ceramic Society,1997(12):3077-3083. |
| [5] | 方平安,吴召平.锂云母微晶玻璃热膨胀性能的研究[J].硅酸盐学报,2002(01):73-76. |
| [6] | 胡安民,李明,毛大立,梁开明.锂铝硅微晶玻璃中纤维状β-锂辉石晶相的形成和表征[J].无机材料学报,2006(01):35-40. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%