Abstract: With nanometer-sized tetragonal ZrO₂ and lithium carbonate as starting materials, Li₂ZrO₃ absorbents were prepared by high-temperature solid-state reaction. The crystal structure of the Li₂ZrO₃ absorbents was studied by comparison of their X-ray diffraction (XRD) patterns. The microscopic morphologies of absorbents were viewed by a scanning electron microscopy(SEM). Their CO₂-absorption abilities were measured with a thermogravimetric analyzer (TG). The experimental results show that absorbed temperature influences CO₂-absorption properties of Li₂ZrO₃, which exhibits very good ability to absorb CO₂ at 500℃. The CO₂ flux, Li₂ZrO₃ sample weight and calefactive rate also have an influence on the CO₂ absorption ability of Li₂ZrO₃.

Key words: Li₂ZrO₃, preparation, CO₂-absorption

摘要： 以纳米级四方相ZrO₂(t)为反应物，采用高温固相法合成了在高温下可直接吸收CO₂的Li₂ZrO₃材料。用扫描电子显微镜（SEM）、X-射线粉末衍射仪（XRD）分别分析了所合成材料的表面与结构特征，使用热重分析仪（TG）研究了Li₂ZrO₃材料吸收CO₂的性能。实验结果表明，吸收温度影响材料吸收CO₂的性能，500℃下Li₂ZrO₃材料具有最佳的CO₂吸收性能。此外，CO₂气体流量、Li₂ZrO₃材料样品重量以及升温速率均影响材料吸收CO₂的性能。

关键词: Li₂ZrO₃, 合成, CO₂吸收