超高温隧道窑碹顶用氧化铝刚玉砖及其制备方法
本发明涉及氧化铝刚玉砖生产技术领域,具体为超高温隧道窑碹顶用氧化铝刚玉砖及其制备方法。所述的超高温隧道窑碹顶用氧化铝刚玉砖,包括以下质量分数的化学组成:AlO:97.5‑98.2%;NbO:0.1‑0.3%;KO:0.2‑0.42%;LiO:0.3‑0.7%;其余为不可避免的杂质。本发明制得的氧化铝刚玉砖体密提高8.5%以上,耐压强度提高20%以上,高温抗折强度提高80%以上,蠕变降低40%,荷重软化开始温度提高100℃。
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