Low-temperature preparation of nano-sized Al2TiO5 powder via non-hydrolytic sol-gel route with Al metal as the aluminum source

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2024-11-22 DOI:10.1016/j.jallcom.2024.177716

Quan Zhang, Junxiong Zhang, Yu Cao, Feng Jiang, Guo Feng, Jianmin Liu, Jian Liang, Hua Li, Qing Hu, Zhifang Xu

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Abstract

Al₂TiO₅ powder was prepared using the non-hydrolytic sol-gel route, with Al powder and titanium tetrachloride as precursor materials. The synthesized powder was characterized via XRD, DSC-TG, TEM, FTIR, FE-SEM, and laser particle size analyzer. The results indicated that Al₂TiO₅ powder can be synthesized at 750 ℃ via gelation when the aluminum-to-alcohol molar ratio was 1:14 and titanium tetrachloride concentration was 0.9 mol/L. The average particle size of Al₂TiO₅ powder was 80 nm using reflux gelation and 35 nm with direct drying gelation. The Al metal utilized the hydrogen chloride produced in situ to activate itself and formed Al-O-Ti hetero-bonds through non-hydrolytic polycondensation. The Al-O-Ti hetero-bonds underwent an exothermic reaction at around 695 ℃ to form Al₂TiO₅. This research has broadened the range of precursor materials available for preparing Al₂TiO₅ using the non-hydrolytic sol-gel route.

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以金属铝为铝源，通过非水解溶胶-凝胶路线低温制备纳米级 Al2TiO5 粉末

以铝粉和四氯化钛为前驱体材料，采用非水解溶胶-凝胶路线制备了 Al2TiO5 粉末。通过 XRD、DSC-TG、TEM、FTIR、FE-SEM 和激光粒度分析仪对合成的粉末进行了表征。结果表明，当铝与酒精摩尔比为 1:14、四氯化钛浓度为 0.9 mol/L 时，可在 750 ℃ 下通过凝胶化合成 Al2TiO5 粉末。回流凝胶法生成的 Al2TiO5 粉末平均粒径为 80 nm，直接干燥凝胶法生成的平均粒径为 35 nm。金属铝利用原位产生的氯化氢激活自身，并通过非水解缩聚形成 Al-O-Ti 异质键。Al-O-Ti 异键在 695 ℃ 左右发生放热反应，形成 Al2TiO5。这项研究拓宽了利用非水解溶胶-凝胶路线制备 Al2TiO5 的前体材料范围。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.