| 氧化钾的含量对牙科微晶玻璃析晶性能的影响 |
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| 引用本文： | 刘晓秋,宋文植,孙宏晨,杨海滨,邹广田,王景云,叶长丽.氧化钾的含量对牙科微晶玻璃析晶性能的影响[J].华西口腔医学杂志,2006,24(5):407-409. |
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| 作者姓名： | 刘晓秋 宋文植 孙宏晨 杨海滨 邹广田 王景云 叶长丽 |
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| 作者单位： | 1.吉林大学口腔医院 修复科，吉林 长春 130041；2.吉林大学中日联谊医院 口腔科，吉林 长春 130031；3.吉林大学 超硬材料国家重点实验室，吉林 长春 130012；4.辽源市中心医院 口腔科，吉林 辽源 136200 |
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| 摘 要： | 目的 研究氧化钾（K2O）的含量对牙科微晶玻璃析晶性能的影响。方法 在Li2O-SiO2-Al2O3-P2O5-ZnO体系的基质玻璃中添加不同含量的K2O，根据差热分析（DTA）曲线确定微晶玻璃的热处理制度，采用X射线衍射分析和扫描电子显微镜（SEM）观测来比较不同的K2O含量对牙科Li2O-SiO2-Al2O3-P2O5-ZnO体系微晶玻璃析晶成分和显微结构的影响。结果 K2O的引入有助于降低玻璃基体的粘度，促进基质玻璃的析晶。在基质玻璃中添加5.3 wt%的K2O可以使玻璃在热处理后析出较多的二硅酸锂晶体，晶体呈板条状，长度约为4 μm，在玻璃基质中分布均匀。 结论 添加一定量的K2O有助于提高牙科Li2O-SiO2-Al2O3-P2O5-ZnO体系微晶玻璃的析晶性能。
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| 关 键 词： | 氧化钾 微晶玻璃 析晶 |
| 文章编号： | 1000-1182（2006）05-0407-03 |
| 收稿时间： | 2005-12-08 |
| 修稿时间： | 2006-07-30 |
Effect of K2O Addition on the Crystallization Property of Dental Glass-ceramics |
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| LIU Xiao-qiu,SONG Wen-zhi,SUN Hong-chen,YANG Hai-bin,ZOU Guang-tian,WANG Jing-yun,YE Chang-li.Effect of K2O Addition on the Crystallization Property of Dental Glass-ceramics[J].West China Journal of Stomatology,2006,24(5):407-409. |
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| Authors: | LIU Xiao-qiu SONG Wen-zhi SUN Hong-chen YANG Hai-bin ZOU Guang-tian WANG Jing-yun YE Chang-li |
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| Institution: | 1. Dept. of Prosthodontics, School of Stomatology, Jilin University, Changchun 130041, China; 2. Dept. of Stomatology, China Japan Union Hospital Attached to Jilin University, Jilin University, Changchun 130031, China；3. National Laboratory of Superhard Materials, Jilin University, Changchun 130012, China；4. Dept. of Stomatology, Liaoyuan Central Hospital, Liaoyuan 136200, China |
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| Abstract: | OBJECTIVE: To evaluate the effect of K2O addition on the crystallization property of dental glass-ceramics in the Li2O-SiO2-Al2O3-P2O5-ZnO system. METHODS: Different content of K2O was added into Li2O-SiO2-Al2O3-P2O5-ZnO glass system. The heat-treated system of the glass-ceramics was determined by differential thermal analyses (DTA), then the crystallization components and the microstmcture of the glass-ceramics with different content of K2O were investigated from X-ray diffraction (XRD) analyses and scanning electron microscopy (SEM). RESULTS: Addition of K2O helped to reduce the viscosity of the glass system and improved crystallization. More lithium disilicate crystals appeared after heated-treatment of the glass system which contained 5.3 wt% addition of K2O, and the homogeneously lath-shaped crystals were 4 gm in length. CONCLUSION: Certain content of K2O can improve the crystallization property of dental glass-ceramics in the Li2O-SiO2-Al2O3-P2O5-ZnO system. |
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| Keywords: | K2O glass-ceramics crystallization |
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