摘要
采用Al2O3与SiO2含量较高的菱镁矿和粘土为原料制备以橄榄石、方镁石和尖晶石为主要物相的碱性隔热耐火材料。借助于XRD、SEM以及Factsage软件等方法研究了材料的相组成、显微结构与性能的关系。结果表明:该材料具有很高的常温强度,当显气孔率为55%时仍能达到40 MPa左右,同时,还具有较高的高温抗折强度与荷重软化温度。但其导热系数较高,这与气孔率较低以及方镁石等晶相的导热系数较高有关。
Basic insulating refractory with main phases of forsterite, spinel and periclase were prepared using magnesite and clay with higher content of Al2O3 and SiO2 as raw materials. The relationship between the phase compositions, mierostructures and properties of the materials were analyzed through XRD, SEM and Factsage et. al. The results show that, the materials possess high cold strength. At the same time, it also possess high modulus of rupture and refractoriness under load, but the thermal conductivity is higher because of lower apparent porosity and existence of periclase phase which has higher thermal conductivity.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2014年第7期1758-1761,1768,共5页
Bulletin of the Chinese Ceramic Society
基金
国家973计划预研项目(2012CB722702)
关键词
碱性隔热耐火材料
组成
结构
导热系数
basic insulating refractories
composition
structure
thermal conductivity
