采用烧结法制备了CaO-SiO_2-R_2O-F(R=Na, K)系微晶玻璃,并结合XRD、DTA、SEM等测试方法,探讨了CaF_2含量对CaO-SiO_2-R_2O-F系微晶玻璃晶化行为的影响.结果表明:添加适量的CaF_2能有效地促进微晶玻璃的析晶.在一定热处理制度下,制备出的微晶玻璃内含大量互锁的板条状晶体和针状晶体,主晶相为硅碱钙石和Frankamenite(一种富含氟的硅碱钙石).随着CaF_2含量的增加,晶体的含量逐渐提高,晶体数量逐渐增大,尺寸逐渐减小.
CaO-SiO_2-R_2O-F(R=Na,K) glass-ceramic were prepared by sintering method in this paper. Influence of nucleation agent CaF_2 on the crystallization behavior of canasite ceramic glasses had been investigated using differential thermal analysis (DTA), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The results indicate that CaF_2 can effectively prompt full crystallization. By means of suitable heat treatment, canasite glass-ceramics can be obtained with a randomly-oriented interlocking blade-like crystals and acicular crystals. The major crystalline phases of the glass-ceramics are canasite and Frankamenite (a fluorine-rich form of canasite). With the increasing of the fluorine concentration, both the content and the number of crystalline phase increase,and the grain size decrease.
参考文献
| [1] | P W 麦克米伦;王仭千.微晶玻璃[M].北京:中国建筑工业出版社,1988 |
| [2] | 程金树;李宏;汤李缨.微晶玻璃[M].北京:化学工业出版社,2006 |
| [3] | Hai-tao Fang;Chen-Guang Liu;Feng Li;Min Liu .Crystallization of Canasite/Frankamenite-Based Glass-Ceramics[J].Chemistry of Materials,2004(26):5736-5743. |
| [4] | Likitvanichkul S;Lacourse W C .Effect of fluorine content on crystallization of canasite glass-ceramics[J].Mater Sic,1995,30(24):6151-6155. |
| [5] | 陈伟民;陈楷;邓再德.氟硅酸盐微晶玻璃的结构和性能[J].硅酸盐通报,1998(02):39-42. |
| [6] | 王双华,杨志方,杨志宏,张恒.氟硅碱钙石微晶/玻璃自生复合材料的制备及其可加工性能研究[J].材料导报,2007(09):96-97,106. |
| [7] | Tsai H.;Eltoukhy A. .Head flying characteristics on canasite disks[J].IEEE Transactions on Magnetics,1991(6):5142-5144. |
| [8] | C. A. Miller;T. Kokubo;I. M. Reaney .Formation of apatite layers on modified canasite glass-ceramics in simulated body fluid[J].Journal of biomedical materials research, Part B. Applied biomaterials,2002(3):473-480. |
| [9] | Naruporn Kanchanaral;Cheryl A. Miller;Paul V. Hatton .Early Stages, of Crystallization in Canasite-Based Glass Ceramics[J].Journal of the American Ceramic Society,2005(11):3198-3204. |
| [10] | Stokes CW;van Noort R;Hand RJ .Investigation of the chemical solubility of mixed-alkali fluorcanasite forming glasses[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,2006(2):142-149. |
| [11] | I. L. Denry;J. A. Holloway .Effect of Sodium Content on the Crystallization Behavior of Fluoramphibole Glass-Ceramics[J].Journal of biomedical materials research, Part B. Applied biomaterials,2002(1):48-52. |
| [12] | A. Johnson;M.Y. Shareef;R. Van Noort .Effect of furnace type and ceramming heat treatment conditions on the biaxial flexural strength of a canasite glass-ceramic[J].Dental materials,2000(4):280-284. |
| [13] | A.A. Omar;E.M.A. Hamzawy;M.M. Farag .Crystallization of fluorcanasite-fluorrichterite glasses[J].CERAMICS INTERNATIONAL,2009(1):301-307. |
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