Influences of glass content on the microstructure and properties of BaO-CaO-Al2O3-SiO2 glass/alumina composite for LTCC applications

2nd International Conference on New Material and Chemical Industry

材料科学;化学工业

Li, Z.X.^1 ; Mao, H.J.^1 ; Zhang, Y.W.^2 ; Zhang, W.J.^1

Department of Material Science and Engineering, National University of Defense Technology, Changsha

410073, China^1

Aerospace Electronic Technology Research Institute, Yantai

264000, China^2

关键词: Bulk density;    CaO-Al2O3-SiO2;    Chemical compatibility;    Crystalline phasis;    Glass content;    Microstructure and properties;    Optimal composition;    Sintering shrinkage;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/292/1/012082/pdf
DOI  :  10.1088/1757-899X/292/1/012082

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this paper, a new amorphous Ba-Ca-Al-Si glass was prepared and the composites with different glass/alumina ratios, which ranged from 40 wt. % glass to 60 wt. % glass, have been studied. According to XRD patterns, the main crystalline phases of the composites are Al2O3and BaAl2Si2O8, and BaAl2Si2O8is generated by the reaction between glass and alumina. With regard to dielectric and mechanical properties, both the dielectric constant and the bending strength of the samples show positive relationships with glass content, and then the values tend to decline when the glass content exceeds 55 wt. %, which can be explained by the results of sintering shrinkage curves, bulk densities and SEM images. The optimal composition of 55 wt. % glass-45 wt. % alumina was developed, exhibiting good dielectric properties (r=5.882, tanδ=2.75×10-3) and high bending strength (σ=169 MPa). Finally, the 55 wt. % glass/alumina composite was chosen for tape casting, showing a well chemical compatibility with silver.