【摘要】 以SiO₂和Li₂CO₃为反应原料,采用高温固相法,在掺杂不同比例的K或Ca元素的条件下合成了一系列可以直接吸收CO₂的硅酸锂（Li₄SiO₄）材料。实验结果表明,掺杂K或Ca元素都可以提高（Li₄SiO₄）材料对CO₂的吸附率,但K和Ca的最佳掺杂量不同。不同元素掺杂对Li₄SiO₄吸附稳定性的影响也有不同。采用X射线衍射（XRD）初步探讨了不同元素掺杂对Li₄SiO₄的吸附性能影响原因。更多还原

【Abstract】 Using SiO₂,Li₂CO₃,and K₂CO₃ or CaCO₃ as the starting materials,lithium silicate（Li₄SiO₄） absorbents doping varying contents of potassium or calcium were prepared by high-temperature solid-state reaction.The effect of doping potassium or calcium on the absorption performances and stability of Li₄SiO₄ were investigated,and the experimental results showed that doping potassium or calcium could improve the CO₂ absorption ability of Li₄SiO₄.However,the optimal doping dose of potassium is different from that of calcium,and the effect of potassium on absorption stability is also different from that of calcium.The different effects of different dopers on absorption ability of Li₄SiO₄ were primarily investigated by X-ray Diffraction（XRD） analysis.更多还原