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La₂O₃对形成镁铝尖晶石转变温度的影响

Effect of La₂O₃ Addition on Phase Transformation Temperature of Magnesia-alumina Spinal

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【作者】许萍；王峰；

【Author】 XU Ping;WANG Feng;Department of Materials Science and Engineering,Inner Mongolia University Of Technology;Department of Mechanical Engineering,Inner Mongolia University Of Technology;

【机构】内蒙古工业大学材料科学与工程学院；内蒙古工业大学机械学院；

【摘要】采用固相烧结法合成镁铝尖晶石粉末,通过X射线衍射分析形成尖晶石的转变温度。结果表明:加入稀土La2O3含量大于1 wt%时,随着La2O3含量的增加,稀土La2O3对尖晶石的相变转变温度的抑制作用增强;随着温度的升高,尖晶石生成量增加。在1500℃下,随着保温时间的延长,尖晶石晶相进一步趋于完善。更多还原

【Abstract】 Magnesia-alumina spinel was synthesised by Solid-phase sintering method. The phase transformation temperature of spinel was studied by XRD.The results indicate,when La2O3 content is more than 1 wt%, that inhibiting effect of La2O3 on phase transformation temperature is increased with the increase of the content. The generation of spinel are increased with increasing temperature. Below 1500 ℃, extending holding time is beneficial to the development of the spinel crystal.更多还原