摘要
研究了MgO细粉的加入对Al2O3 尖晶石系浇注料性能的影响。在110℃×24h烘干,1500℃×3h烧成制度下,通过改变基质中MgO细粉的加入量,对材料物理性能和力学性能进行测试。结果表明:3%～5%MgO细粉的加入能显著改善Al2O3 尖晶石系浇注料的综合烧结性能如:显气孔率15%～17%;体积密度3 01～3 03g/cm3,;耐压强度和抗折强度分别高达104～115MPa和12 5～14 5MPa;当MgO细粉的加入量大于5%时,由于材料线变化率和显气孔率的过度增大,引起材料结构的松散,导致材料强度的降低和抗渣性能的下降如:显气孔率大于20%;体积密度小于2 90g/cm3,;耐压强度和抗折强度则分别小于100MPa和11MPa。
Effect of MgO powder addition on properties of Al_2O_3-spinel castable is investigated.Properties of the castable with the different MgO powder addition by drying at 110℃ for 24 hours,then sintering at 1 500℃ for 3 hours are tested.The results indicate that addition of 3%～5% MgO powder can remarkably improve properties of Al_2O_3-spinel castable:the ratio of apparent porosity is 15%～17% and bulk density 3.01～3.03 g/cm^3,cold crushing strength 104～115 MPa,cold bending strength 12.5～14.5 MPa.Addition of MgO powder which is more than 5% not only increases the permanent linear and the ratio of apparent porosity but also decreases its cold crushing strength and slag resistance to some degree:the ratio of apparent porosity is more than 20% and bulk density less than 2.90 g/cm^3,cold crushing strength less than 100MPa,cold bending strength less than 11MPa.
出处
《河南科技大学学报（自然科学版）》
CAS
2004年第5期5-8,共4页
Journal of Henan University of Science And Technology:Natural Science
