A process for fabrication of Li2TiO3 ceramic pebbles with high mechanical properties via non-hydrolytic sol-gel method
A process for fabrication of Li2TiO3 ceramic pebbles with high mechanical properties via non-hydrolytic sol-gel method
复制标题
DOI：
10.1016/j.ceramint.2020.07.266
复制
发表时间：
2020-12-01
影响因子：
5.2
通讯作者：
Zhang, Yingchun
中科院分区：
文献类型：
--
作者：
Tan, Guangfan;Hu, Xin;Zhang, Yingchun
本文以无水醋酸锂（LiOAc）为锂源，钛酸四丁酯（TBOT）为钛源，采用非水解溶胶-凝胶法（NHSG）成功合成了单相Li 2 TiO 3粉体。采用XRD研究了温度和Li/Ti摩尔比对Li 2 TiO 3合成的影响。采用FT-IR和XPS对Li 2 TiO 3粉体在650 ℃、5 ℃/min加热2 h后的合成机理和表面化学进行了表征。结果表明，在空气中1050 ℃烧结2 h，可成功制备出直径为1.3 mm ~ 1.5 mm、压碎载荷为67 N、球度为0.97、相对密度为84.9%、晶粒尺寸为2.85 μ m、孔隙率为19.84%的Li 2 TiO 3小球。因此，NHSG法可以为Li 2 TiO 3陶瓷卵石的生产提供一条新的高效途径。
In this paper, the single-phase Li2TiO3 powder was successfully synthesized via non-hydrolytic sol-gel method (NHSG) using anhydrous lithium acetate (LiOAc) as lithium source and tetrabutyl titanate (TBOT) as titanium source. The effects of the temperature and the Li/Ti molar ratio on the synthesis of Li2TiO3 were investigated by XRD. FT-IR and XPS were used to characterize the synthesis mechanism and surface chemistry of Li2TiO3 powder heated at 650 degrees C for 2 h with 5 degrees C/min. Furthermore, the Li2TiO3 pebbles were successfully prepared using synthesized powder by indirect wet chemistry method. The results showed that the Li2TiO3 pebbles with diameter of 1.3mm-1.5 mm, crush load of 67 N, sphericity of 0.97, the relative density of 84.9%, the grain size of 2.85 mu m and porosity of 19.84% were successfully fabricated when sintering temperature was 1050 degrees C for 2 h in air. Therefore,the NHSG method could provide a new efficient route for the production of Li2TiO3 ceramic pebbles.