堇青石对镁铝尖晶石质耐火材料抗热震性能的影响

Influence of Cordierite on Thermal Shock Resistance of Magnesia-alumina Spinel

镁铝尖晶石堇青石复合耐火材料是以各种级配的镁铝尖晶石和1～0 mm的堇青石为骨料,0.088 mm镁铝尖晶石和二氧化硅微粉为基质,加入硅溶胶结合剂制成的烧结耐火材料。所获得的材料经过1200℃烧结具有优良抗热震性以及满足要求的其他性能,随着堇青石掺量的增加,材料的抗折强度降低,抗热震性增强。

Composites refractory material of magnesia-alumina spinel cordierite is a kind of sintered refractory material composed of a variety of magnesia-alumina spinel with granular composition and cordierite with 1-0 mm as aggregate, combination of magnesia-alumina spinel with 0. 088 mm and micro powder of silicon dioxide as substrate, as well as silicasol as binder. After sintering at 1200 ℃, the material has excellent thermal shock resistance and other performances which can meet the requirements. With increase of the cordierite dosage, the flexural strength decreased and thermal shock resistance enhanced.