铁矿渣矿化剂对硅微粉结合SiC窑具材料晶相结构与性能的影响  

INFLUENCE OF IRON-ORE SLAG MINERALIZER ON THE MECHANICAL AND OXIDATIVE PROPERTIES OF SiC KILN FURNITURE BONDED WITH FINE SILICON POWDER

作　　者：沈阳[1] 阮玉忠[1] 于岩[1] 

机构地区：[1]福州大学材料科学与工程学院,350002

出　　处：《陶瓷学报》2005年第3期145-148,共4页Journal of Ceramics

摘　　要：在硅微粉结合的SiC窑具材料中添加不同含量的铁矿渣,铁矿渣中的Fe2O3在高温下形成一定数量的液相,能使硅微粉析出的α—方石英转变为稳定的α—磷石英,提高窑具材料的热稳定性和强度,延长使用寿命。本文主要探讨不同含量的铁矿渣对窑具材料力学性能和抗氧化性能的影响。实验结果表明,确定0.4wt%铁矿渣为最佳加入量。窑具的抗折强度为21.2MPa,1次和10次热震抗折强度保持率分别为47.3%和46.6%。经12小时氧化的氧化度为0.0061%,与其他试样相比,氧化速度大大降低。The iron-ore slag of different contents was added to SiC kiln furniture bonded with fine silicon powder. Some amount of liquid, formed of Fe203 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 discussed,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 oxidisability is 0.0061% after oxidation for 12 h.

关 键 词：硅微粉 SIC窑具 铁矿渣 性能 

分 类 号：TQ174.653.8[化学工程—陶瓷工业]