摘要：用硅酸锂溶液与氢氧化锂水热反应，利用高温固相反应在不同温 度下合成了硅酸锂材料， 用 X 射线粉末衍射技术表征了合成材料，用 差热－热重技术分析了硅酸锂材料吸收 CO₂ 的性能。 结果表明，在 350、 450、550 ℃温度下煅烧，材料中生成物相的是 Li2SiO3 和 Li2CO3。 合成出 的材料在常温空气和 CO₂ 环境下具备一定的吸碳能力。 在 650、750 ℃ 煅烧分别生成了 Li₄SiO₄ 和 Li₂SiO₃。 合成温度较高时，Li₄SiO₄ 生成量较 高，对 CO₂ 的吸收值也相应提高。 

关键词：吸碳材料；硅酸锂；高温固相反应

Abstract：By hydro-thermal reaction of lithium silicate solution and lithi um hydroxide， and sintering reaction at different temperature by solid re action， lithium silicate materials were synthesized. The synthesized prod ucts were characterized by XRD， and the property of CO₂ absorption was analyzed by DTA-TG. According to the results， Li₂SiO₃ and Li₂CO₃ were found in the synthesized materials under 350， 450， 550 ℃ respectively. The synthesized materials absorbed CO₂ under the ambient temperature. The synthesized materials under 650， 750 ℃ were blend of Li₄SiO₄ and Li₂SiO₃. Li₄SiO₄ was found to be the main phase under higher tempera ture， and the CO₂ absorption dosage was higher. 

Keywords：carbon dioxide；lithium silicate；absorption at high temperature