铝钛渣对镁质复合材料烧结性能的影响

Effect of Alumina Titania Slag on Sintering Property of Magnesium Compound Material

为了探索铝钛渣对镁质复合材料烧结性能的影响，提高镁质复合材料的使用性能，试验用电熔镁砂、高纯镁砂、氧化铝微粉和氧化铬微粉为主要原料制备镁质复合材料。用热膨胀仪对比烧前和烧后镁质复合材料的线膨胀率和线膨胀系数，结果表明，烧前镁质复合材料的线膨胀率和线膨胀系数为1100～1300℃，会出现较明显的增大趋势，烧后镁质复合材料的线膨胀率未出现显著增大的趋势，而线膨胀系数随着铝钛渣加入量的增大而逐渐减小。铝钛渣对镁质复合材料有促烧结作用，经1100和1500℃烧后的镁质复合材料体积密度和常温抗折强度随铝钛渣加入量增大而逐渐增大。

Using fused magnesia, high-purity magnesia, alumina and chrome micro powder as the major raw mate- rials, the effect of alumina titania slag on the sintering property of magnesium compound material was investigated in order to develop the using performance of magnesium compound material. The linear expansion percent and lin- ear expansion coefficient of burned and unburned magnesium compound material were contrasted using the linear dilatometer. The linear expansion percent and linear expansion coefficient of unburned magnesium compound mate- rial increases obviously between 1 100-1300 ℃. The expansion percent trend of burned compound material is sta- ble. The linear expansion coefficient of burned compound material decreases with increasing alumina titania slag. Alumina titania slag can promote the sintering property of magnesium compound material. Bulk density and cold flexural strength of magnesium compound material burned at 1 100 and 1500 ＂C increases garaually with the in- creased amount of alumina titania slag.