SHEN Yang, RUAN Yuzhong, YU Yan
(College of Materials Science and Engineering, Fuzhou University, 350002)
Abstract: The iron- ore slag of different contents was added to SiC kiln furniture bonded with fine silicon powder. Some amount of liquid, formed of Fe 2O3 at high temperature, can convert α- cristobalite crystallized from the fine silicon powder to stable α- tridymite so as to improve the heat- stability of kiln furniture and then to prolong its lifetime. The influences of iron- ore slag of different contents on the mechanical properties and oxidation of kiln furniture were dis-cussed.Results show that the best proportion of the iron- ore slag added is to be 0.4wt%, with the bending strength of 21.2 Mpa, and 47.3% and 46.6% for the bending strength maintenance after one and ten thermal shocks, respectively. The oxidis- ability is 0.0061% after oxidation for 12h.
Keywords: fine silicon powder，SiC kiln furniture，iron- ore slag，properties