摘要
以刚玉、尖晶石、纯铝酸钙水泥和氧化铝微粉为主原料 ,研究了氧化锆对刚玉 -尖晶石浇注料热震稳定性的影响 ,并采用X射线衍射和扫描电镜分析了试样的相组成和显微结构。结果表明 :加入约 3%的氧化锆可以大幅度提高刚玉 -尖晶石浇注料的热震稳定性 ,但过多的氧化锆对刚玉 -尖晶石浇注料的热震稳定性不利 ;含锆刚玉 -尖晶石浇注料热震稳定性提高的机理为微裂纹增韧。
The influence of zirconia on thermal shock stability of corundum-spinel castables was studied by using corundum,spinel,calcium aluminate cement and ultra-fine alumina powder as main starting materials,the phase compositions and microstructure were studied by using XRD and SEM.The results show 3wt% zirconia addition can improve thermal shock stability of castables considerably.The results also indicate too much zircon is harmful to thermal shock stability.The improved mechanism is microcrack toughening.
出处
《耐火材料》
CAS
北大核心
2004年第2期73-75,共3页
Refractories
