| CaO-P_2O_5-Na_2O-B_2O_3玻璃分相和析晶的研究 |
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| 引用本文： | 蔡舒,张文娟,王冬梅,李金有,姜伟,李许东. CaO-P_2O_5-Na_2O-B_2O_3玻璃分相和析晶的研究[J]. 稀有金属材料与工程, 2009, 38(Z2) |
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| 作者姓名： | 蔡舒 张文娟 王冬梅 李金有 姜伟 李许东 |
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| 作者单位： | 天津大学,先进陶瓷与加工技术教育部重点实验室,天津,300072 |
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| 摘 要： | 以44CaO-43P_2O_5-10Na_2O-3B_2O_3 为玻璃体系,通过高温熔融法制备基质玻璃,并进行相应的热处理,可获得由基质玻璃和析晶相组成的玻璃陶瓷.用DSC, XRD, SEM和EDS对玻璃的成核、析晶,相组成和微观结构进行分析.结果表明:B的引入将促进玻璃的分相,富B相在热处理过程中产生析晶;同时,热处理也引起基质玻璃的进一步析晶.在700 ℃热处理4 h,材料由残余玻璃基质、Ca(PO_3)_2晶粒和微量CaNa_2PO_4组成.试样在磷基缓冲溶液(PBS)中进行降解实验,11d时Ca~(2+)浓度达到峰值17.2 μg/g,并有大量类羟基磷灰石形成,随后Ca~(2+)浓度变化放缓.
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| 关 键 词： | 玻璃-陶瓷 分相 析晶 |
Phase Separation and Crystallization of CaO-P_2O_5-Na_2O-B_2O_3 Glass Ceramics |
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| Cai Shu,Zhang Wenjuan,Wang Dongmei,Li Jinyou,Jiang Wei,Li Xudong. Phase Separation and Crystallization of CaO-P_2O_5-Na_2O-B_2O_3 Glass Ceramics[J]. Rare Metal Materials and Engineering, 2009, 38(Z2) |
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| Authors: | Cai Shu Zhang Wenjuan Wang Dongmei Li Jinyou Jiang Wei Li Xudong |
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| Affiliation: | Cai Shu,Zhang Wenjuan,Wang Dongmei,Li Jinyou,Jiang Wei,Li Xudong (Key Laboratory for Advanced Ceramics , Machining Technology of Ministry of Education,Tianjin University,Tianjin 300072,China) |
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| Abstract: | A glass ceramic in the system of CaO-P2O5-B2O3-Na2O (CPBN),which consisted of matrix glass and crystal grains,was obtained by melt-quenching method followed by heat treatment. The crystallization from glass matrix and microstructure were analyzed by DSC,XRD,SEM and EDS. The experimental results showed that the addition of B2O3 induced phase separation of the glass into a phosphate glass matrix and boron rich island-like droplets prior to crystallization. More importantly,heat-treatment would promote further... |
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| Keywords: | glass-ceramics phase separation crystallization |
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