作者：YASUHISA NAKANISHI;OSAMU SAKURADA;MINORU HASHIBA;

作者单位：Material Engineering Division, Graduate School of Engineering, Gifu University; 1-1, Yanagido, Gifu-shi, Gifu 501-1193 Present address; NGK Adrec Co., Ltd.; 3040 Mizano, Mitake-cho, Kani-gun, Gifu 505-0112;Department of Materials Science and Technology, F

刊名：Journal of the Technical Association of Refractories

ISSN：0285-0028

出版年：2009-01-05

卷：29

期：3

起页：183

止页：187

分类号：TQ175

语种：英文

关键词：SiC;refractory;slip casting;V_2O_5;cristobalite;

内容简介

The effects of V_2O_5-SiO_2 addition on the fired behavior of SiC refractory materials were studied. Green bodies were fabricated by aqueous slip casting with sodium silicate as a dispersant from coarse and fine particles of SiC containing SiO_2 and V_2O_5 as bonding agents. In general, slip casting gave a high green body packing density compared with pressing. The fired SiC compacts with 1.0 mass% SiO_2 and 1.5 mass% V_2O_5, which were the optimal amounts of bonding agents, fired at 1000-1400 deg C showed bending strengths above 150 MPa, which was almost double that without V_2O_5. Microstructural observations using SEM-EDX and XRD measurement indicated that the enhancement of strength could be attributed to the formation of adherent cristobalite around the SiC particles. Cristobalite was formed mainly by the reaction of SiC and V_2O_5.