We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Porous Silicon Nitride Ceramics Prepared by Reduction–Nitridation of Silica.
- Authors
Shao-Yun Shan; Jian-Feng Yang; Ji-Qiang Gao; Wen-Hui Zhang; Zhi-Hao Jin; Janssen, Rolf; Ohji, Tatsuki
- Abstract
A new method for preparing porous silicon nitride ceramics with high porosity had been developed by carbothermal reduction of die-pressed green bodies composed of silicon dioxide, carbon, sintering additives, and seeds. The resultant porous silicon nitride ceramics showed fine microstructure and uniform pore structure. The influence of SiO2 particle size and sintering process (sintering temperature and retaining time) on the microstructure of sintering bodies was analyzed. X-ray diffractometry demonstrated the formation of single-phase β-Si3N4 via the reaction between silicon dioxide and carbon at high temperature. SEM analysis showed that pores were formed by the banding up of rod-like β-Si3N4 grains. Porous Si3N4 ceramics with a porosity of 70–75%, and a strength of 5–8 MPa, were obtained.
- Subjects
CERAMICS; SILICON nitride; POROUS silicon; SINTERING; IRON metallurgy; NANOSTRUCTURED materials; POWDER metallurgy
- Publication
Journal of the American Ceramic Society, 2005, Vol 88, Issue 9, p2594
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2005.00444.x