| 材料组成对镁铝尖晶石化行为的影响 |
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| 作者姓名： | 裴春秋 石 干 |
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| 作者单位： | 中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室 |
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| 基金项目： | 国家重点基础研究发展计划(973)资助项目(2010CB735810) |
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| 摘 要： | 以菱镁石、轻烧氧化镁和工业氧化铝细粉为原料,采用半干压法成型,在不同温度下煅烧处理,研究材料组成对镁铝尖晶石化行为的影响。结果表明,富铝尖晶石的尖晶石化反应滞后于富镁尖晶石,两类尖晶石化反应完成温度相差约100℃;富铝尖晶石的尖晶石化反应分两步进行,即在形成理论尖晶石的基础上再固溶氧化铝,最终形成富铝尖晶石;富铝尖晶石烧结程度较富镁尖晶石的低,形成较小的晶粒和气孔。
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| 关 键 词： | 组成 镁铝尖晶石 反应 |
| 收稿时间： | 2011/9/19 0:00:00 |
Influence of the composition on MA spinel properties |
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| Authors: | Pei Chunqiu and Shi Gan |
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| Institution: | (State Key Laboratory of Advanced Refractories,Sinosteel Luoyang Institute of Refractories Research Co.,Ltd.,Luoyang 471039,China) |
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| Abstract: | Magnesium aluminate spinel material was synthesized in different proportions and different sintering temperatures from magnesite,light calcined magnesia and industrial alumina.The influence of MA spinel composition(magnesia-and alumina-rich spinel) on the spinellization behaviour was studied.The results indicate that,the spinel reaction of alumina-rich spinel samples lags behind that of magnesium-rich spinel samples for about 100 ℃,and the reaction of alumina-rich samples falls into two steps.Stoichiometric composition spinel is formed first.On this basis,solid solution reaction occurs between alumina and stoichimetric composition spinel,and alumina-rich spinel is formed at last.Alumina-rich spinel has lower sintering,smaller grain size and pore size. |
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| Keywords: | composition magnesium aluminate spinel reaction |
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