LIU Ming, XU Xiaoying, WANG Xiaofeng, WANG Xinwu, AN Ziqi, LI Chao, LIU Jinghua, ZHANG Yafei, LIU Rui, ZHANG Ping
(School of Materials Science and Engineering, Luoyang Institute of Science and Technology, Luoyang 471023, Henan, China)
Abstract: Properties of glass/α-Al2O3 slurries, physical properties of green tapes and sintering properties of green bodies were studied with Ca-Ba-Mg-Al-B-Si-O glass and α-Al2O3 powder as the raw materials. The contents of dispersants, plasticizers and binders were optimized to achieve optimal properties of the tape casting slurry and the performances of the green tapes. It is found that the viscosity of the glass/α-Al2O3 slurry was decreased in with dispersants in the order of PEG, TEOA, TBP and castor oil. The slurry stability, bulk density and tensile strength of the green tapes were first increased and then decreased, as the content of castor oil was increased from 1wt.% to 4wt.%. The optimal content of castor oil was 2wt.%, with which the Ca-Ba-Mg- Al-B-Si-O glass/α-Al2O3 green tapes have smooth surface, compact structure, bulk density of 1.94 g·cm-3, tensile strength of 1.59 MPa and high sinterability. Therefore, application for multilayer low-temperature co-fired ceramics.
Key words: Ca-Ba-Mg-Al-B-Si-O glass; α-Al2O3; green tape; optimal design; property