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Li_2O-ZnO-SiO_2系微晶玻璃的结晶及其封接特性
作者:王守平 孙俊才 白晶 田东 赵艳艳 吴叶红  
单位:大连海事大学机电与材料工程学院 大连海事大学机电与材料工程学院 唐山海港华泰功能陶瓷材料有限公司 唐山海港华泰功能陶瓷材料有限公司 唐山海港华泰功能陶瓷材料有限公司 唐山海港华泰功能陶瓷材料有限公司 辽宁 大连116026 唐山海港华泰功能陶瓷材料有限公司 河北 唐山063611 辽宁 大连116026 河北 唐山063611 河北 唐山063611 河北 唐山063611 河北 唐山063611 
关键词:析晶  结构  二硅酸锂  硅酸锌  方石英  微晶玻璃 
分类号:TQ171
出版年,卷(期):页码:2008,36(2):261-265
DOI:
摘要:

采用X射线衍射定性分析、差热分析、扫描电镜等手段研究了Li_2O-ZnO-SiO_2(组成为9.0%Li_2O,27.1%ZnO,55.6%SiO_2,2%K_2O,3.2%P_2O_5,3.1%CaO,质量分数)玻璃粉末处理后的微晶玻璃的的结晶特性。结果表明:当热处理温度低于800℃时,主晶相为半蜷曲状二硅酸锂和硅酸锌,次晶相为圆柱状α-方石英;当热处理温度超过800℃后,α-方石英逐步转变成β-方石英并成为主晶相,次晶相为二硅酸锂和硅酸锌且部分晶体重熔转变成玻璃。重熔过程有利于与金属材料封接。当热处理温度为950℃,封接后的封接件(不锈钢壳体,铜针引线)中微晶玻璃的外观良好,呈乳白色。密封气密性良好。500℃热冲击实验[(-55±2)~(500±5)℃]后,微晶玻璃无损伤。微晶玻璃在500℃时绝缘强度为3.3×10~(12)Ω·cm,膨胀系数为129×10~(-7)/℃。

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The microstructure and crystallization of Li_2O-ZnO-SiO_2 glass-ceramics with a composition of 9.0%(mass fraction,the same below)Li_2O,27.1%ZNO,55.6%SiO_2,2%K_2O,3.2%P_2O_5,3.1%CaO was investigated after heat treatment at different tem- peratures by X-ray diffraction and differential thermal analysis and scanning electron microscopy.The results show that when the heat treatment temperature is lower than 800℃,the main crystal phases in the glass-ceramics are Li_2Si_2O_3 and ZnSiO_3 with half curling type structure,the secondary crystal phase is a-quartz with circular column form;when the heat treatment temperature is over 800℃,α-cristobalite gradually transforms intoβ-cristobalite that is the main crystal phase in the glass-ceramics,the secondary crystal phase are Li_2Si_2O_3 and ZnSiO_3 and parts of them will remelt to transform into glass phase.The remelting is in favor of sealing with metal.A seal piece with stainless steel shell and cupper needle core and using Li_2O-ZnO-SiO_2 glass as seal material was heat treated at 950℃for 20 min,the appearance of milk white glass-ceramic in the seal piece with good leak tightness is best.The seal piece after thermal shock test for(-55±2)℃-(500±5)℃is complete and the glass-ceramic no damage.The glass-ceramic has a insulating strength of 3.3×10~(12)Ω·cm at 500℃,a coefficient of expansion of 129×10~(-7)/℃.

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参考文献:

[1]北京轻工业学院.玻璃工艺学[M].北京:中国轻工业出版,1982:579-580. Beijing light Industry Collage.Glass Technology(in Chinese),Beijing: China Light Industry Press.1982:579-580. [2]韩敏芳,王琪.SOFC封接材料和封接技术[J].世界科技研究与发展.2006,28(5):36-42.HAN Minfang,WANG Qi.Technol Res Dev World(in Chinese),2006, 28(5):36-42. [3]麦克米伦P W,微晶玻璃[M].王仞千译.北京:中国建筑工业出版社.1988:105.MCMILAN P W.Glass Ceramics(in Chinese).WANG Renqian trans. Beijing:China Architecture industry Press.1988:105. [4]杨南如,岳文海.无机非金属材料图谱手册[M].武汉:武汉工业大学出版社,2000.YANG Nanru,YUE Wenhai.Inorgunic Nonmetal Material Icon Man- ual(in Chinese).WUhan:Wuhan Industry Collage Press,2000. [5]LEVIN E M,ROBBINS C R,MCMVRDLE H F.Phase Diagrams for ceramics[M].USA:The American Ceranic Society,1964:182. [6]MCMILLAN P W.Crystallization behaviour of a high zinc content Li_2O-ZnO-SiO_2 glass-ceramics and the effect of K_2O additions[J].J Am Ceram Soc.1985,68(4):220-224. [7]铁征骑.新型陶瓷材料手册[M].南京:江苏科学技术出版社.1995:42.TIE Zhengqi.New Type Ceramica Material Manual(in Chinese).Nan- jing:Jiangsu Science Technology Press,1995:42.

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