Fabrication and Properties of CaAl12O19-Al2O3 Composite Ceramics
CaAl12O19-Al2O3 composite ceramics were synthesized by in situ solid-state reaction using CaCO3 and industrial α-Al2O3 powders.The effects of sintering temperature and CA6 (CaAl12O19) content on phases and microstructure of the final composites were studied by XRD and SEM.The results showed that sheet-like CA6 appeared in the materials when sintering temperature was higher than 1400℃ and grew up with increasing sintering temperature.The optimum sintering temperature was 1600℃.The sample with 20wt% CA6 had the bulk density of 3.21g·cm-3,the apparent porosity of 9.94% and the bending strength of 149.88MPa.With the increasing of CA6 content in the final composite ceramics,the bulk density and the bending strength increased firstly and then decreased.The lowest apparent porosity 1.42%,a density of 3.60g/cm3 and the highest bending strength of 265.10MPa were achieved for the sample containing 10wt% CA6 sintered at 1600℃.
CaAl12O19-Al2O3 In situ solid state reaction Sheet-like crystals
Xueyin Liu Yan-gai Liu Dexin Yang Dingyun Ye Zhaohui Huang Minghao Fang
School of Materials Science and Technology,China University of Geosciences(Beijing),Beijing 100083,P.R.China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
539-542
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）