Li 4 SiO 4 was obtained by using quartz powder of different particle sizes (75−180 μm, 45−75 μm, 38−45 μm, and <38 μm) and Li 2 CO 3 as raw materials through a solid-state reaction at 720 °C. X-ray diffraction (XRD), scanning electron microscopy (SEM), and differential thermal analysis and thermogravimetry (DTA/TG) were used to examine the sintering behavior and properties of the samples. The results indicated that when the particle size of the quartz powder decreased, the solid-state reaction performed more completely, the content of the Li 4 SiO 4 phase increased, and the size of the grain agglomerates decreased gradually. The enhanced chemical reactivity of the quartz powder with Li 2 CO 3 and the shortened diffusion distance as the quartz size decreases are helpful to the formation of the Li 4 SiO 4 phase. The sorption analysis revealed that the samples synthesized using the quartz powder with smaller particle sizes experienced a more rapid absorption−desorption process with a higher absorption efficiency.
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