摘要
实验以玻璃与Al2O3为主要原料流延成型生瓷带,通过优化试样的压制工艺,800~950℃范围内烧结得到Ca-Ba-Mg-Al-B-Si-O玻璃/Al2O3材料。研究结果表明,随着Ca-Ba-Mg-Al-B-Si-O玻璃/Al2O3生坯压制压力变大或保压时间增加,玻璃/Al2O3材料的生坯及烧结试样的密度增加,烧成收缩率减小。850℃烧成试样结构致密,钙离子、铝离子、硅离子与氧离子在高温下聚集,并发生了物理化学反应,生成钙长石晶体,进一步促进了烧成试样的致密化。Ca-Ba-Mg-Al-B-Si-O玻璃/Al2O3材料在压力20 MPa,保压时间10 min下成型生坯性能良好,烧结体物理性能优良,适合用于LED基板材料。
Ca-Ba-Mg-Al-B-Si-O glass/Al2O3 system dielectric ceramic materials are prepared at 800~950℃through optimizing the forming process of samples,with the method of tape casting process with Ca-Ba-Mg-Al-B-Si-O glass and Al2O3 powder as the raw materials.The results show that bulk density of green bodies and the corresponding sintered composites increase with the increase of pressing pressure and holding time,and their sintered shrinkage gets decreased.The sample sinter at 850℃has compact structure.The physical and chemical reaction occurs at high temperature with Ca 2+,Al 3+,Si 4+,O 2-gather together,and form calcium feldspar crystal,further promotes the densification of sintered samples.Ca-Ba-Mg-Al-B-Si-O glass/Al2O3 material at pressure 20 MPa,time 10 min exhibits better properties,such as good green body and excellent physical properties,and that suggests a good application for LED substrate material.
作者
安子琦
刘明
许晓颖
李朝
刘静华
张亚飞
刘瑞
AN Ziqi;LIU Ming;XU Xiaoying;LI Chao;LIU Jinghua;ZHANG Yafei;LIU Rui(School of Materials Science and Engineering,Luoyang Institute of Science and Technology,Luoyang 471023,China)
出处
《河南化工》
CAS
2020年第4期7-10,19,共5页
Henan Chemical Industry
基金
河南省大学生创新创业训练计划项目(创新重点项目)(201911070001)
国家自然科学基金项目(U1304520)
河南省科技攻关计划项目(162102210280)
河南省高等学校重点科研项目计划(15A430035)
全国建筑材料行业科技创新计划项目(2015-M2-1)。
关键词
玻璃/Al2O3
生坯
压制压力
保压时间
钙长晶石
glass/Al2O3
green bodies
pressing pressure
holding time
calcium feldspar crystal
