硅酸盐通报2011，Vol.30Issue(3)：736-740,5.
水基冷冻干燥工艺制备层状结构多孔SiC陶瓷
Fabrication of Porous SiC Ceramics with Laminated Structure by Freeze Casting of Aqueous Slurries
摘要
Abstract
Porous oxidation-bonded silicon carbide ceramics with highly aligned laminated structures were fabricated by combined freeze-casting of aqueous slurries with oxidation-bonding sintering technique. The different parameters of the process, such as the solids content of the suspension, the sintered temperature have been studied to determine their influence on the microstructure, and distribution of pores of the sintered samples. The pore structure was substantially affected by the starting slurry concentration and sintering temperature. A porous silicon carbide with high porosity (50％-70％) was obtained and its porosity somewhat decreased when the slurry concentration and sintering temperature increased. The porous SiC ceramics sintering at 1400 ℃ had a unique microstructure. When the solid content was 30％,a high compressive strength up to 25.5 MPa was achieved at a high porosity of 61.8％.关键词
冷冻干燥工艺/多孔SiC陶瓷/层状孔结构/原位反应烧结Key words
freeze casting/porous SiC ceramics /laminated pore structure/in situ reaction sintering分类
通用工业技术引用本文复制引用
徐照芸,罗民,王怀昌,梁斌,宋伟明..水基冷冻干燥工艺制备层状结构多孔SiC陶瓷[J].硅酸盐通报,2011,30(3):736-740,5.基金项目
国家自然科学基金项目(No.21061012) （No.21061012）
国家教育部科学技术研究重点项目(No.210237) （No.210237）
宁夏自然科学基金(NZ0916) （NZ0916）
