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低介低损耗微晶玻璃中晶相与热膨胀性能关系的研究
Relation of Thermal Expansion Property and Crystal Phase in Glass Ceramics for Low Dielectric Loss Microwave Medium Materials
【摘要】 本文以堇青石微晶玻璃为研究对象, 首次研制得到了一种低介( ε= 51) 、低损耗(tgδ<10 - 3) 、热膨胀系数(46 ~48 ×10 - 7‘ C) 能与其它器件相匹配的新型微晶玻璃介质材料通过 X射线衍射分析, 扫描电镜观察等测试手段, 研究了该材料的晶化过程和热膨胀系数的变化规律发现样品的热膨胀系数随温度的变化行为是与样品中析出的晶相种类及析出量随温度的变化规律相对应的
【Abstract】 Glass ceramics with α cordierite(2MgO·2Al 2O 3·5SiO 2) as main crystal phase, having excellent dielectric property, are perfect materials for microwave parts of a medium apparatus However, the thermal expansion coefficient of the material is not high enough for some special applications Now, a novel glass ceramics with suitable thermal expansion coefficient (47 7×10 -7 / C) and excellent dielectric property (ε=5 1,tgδ<10 -3 ) was developed Crystallization process and the thermal expansion coefficient changes of the material was studied by X ray diffraction (XRD), scanning electron microscope (SEM) and thermal expansion property testing The results show that the thermal expansion coefficient changes respond to crystal phase proportion and transition
【Key words】 glass ceramics; thermal expansion coefficient; dielectric property; crystal phase;
- 【文献出处】 无机材料学报 ,JOURNAL OF INORGANIC MATERIALS , 编辑部邮箱 ,1999年04期
- 【分类号】TQ171
- 【被引频次】22
- 【下载频次】159