Effect of solvents on the morphology and structure of barium titanate synthesized by a one-step hydrothermal method

IF 5.6 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

International Journal of Minerals, Metallurgy, and Materials Pub Date : 2023-05-13 DOI:10.1007/s12613-023-2614-9

Xiaoxiao Pang, Tingting Wang, Bin Liu, Xiayue Fan, Xiaorui Liu, Jing Shen, Cheng Zhong, Wenbin Hu

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引用次数: 2

Abstract

Tetragonal barium titanate was synthesized from barium hydroxide octahydrate and titanium tetrachloride through a simple one-step hydrothermal method. The effect of different solvents on the crystal structure and morphology of barium titanate nanoparticles during the hydrothermal process was investigated. Except for ethylene glycol/water solvent, impurity-free barium titanate was synthesized in pure water, methanol/water, ethanol/water, and isopropyl alcohol/water mixed solvents. Compared with other alcohols, ethanol promotes the formation of a tetragonal structure. In addition, characterization studies confirm that particles synthesized in methanol/water, ethanol/water, and isopropyl alcohol/water mixed solvents are smaller in size than those synthesized in pure water. In the case of alcohol-containing solvents, the particle size decreases in the order of isopropanol, ethanol, and methanol. Among all the media used in this study, ethanol/water is considered the optimum reaction media for barium titanate with high tetragonality (defined as the ratio of two lattice parameters c and a, c/a = 1.0088) and small average particle size (82 nm), which indicates its great application potential in multilayer ceramic capacitors.

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溶剂对一步水热法合成钛酸钡的形貌和结构的影响

以八水氢氧化钡和四氯化钛为原料，采用简单的一步水热法制备了四方钛酸钡。研究了水热过程中不同溶剂对纳米钛酸钡晶体结构和形貌的影响。除乙二醇/水溶剂外，在纯水、甲醇/水、乙醇/水、异丙醇/水混合溶剂中均可合成无杂质钛酸钡。与其它醇相比，乙醇促进了四方结构的形成。此外，表征研究证实，在甲醇/水、乙醇/水和异丙醇/水混合溶剂中合成的颗粒尺寸小于在纯水中合成的颗粒。在含醇溶剂的情况下，粒径按异丙醇、乙醇和甲醇的顺序减小。在本研究使用的所有介质中，乙醇/水被认为是钛酸钡的最佳反应介质，具有高四方性(定义为两个晶格参数c与a之比，c/a = 1.0088)和小平均粒径(82 nm)，表明其在多层陶瓷电容器中具有很大的应用潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Minerals, Metallurgy, and Materials 工程技术-材料科学：综合

CiteScore

9.30

自引率

16.70%

发文量

205

审稿时长

2 months

期刊介绍： International Journal of Minerals, Metallurgy and Materials (Formerly known as Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material) provides an international medium for the publication of theoretical and experimental studies related to the fields of Minerals, Metallurgy and Materials. Papers dealing with minerals processing, mining, mine safety, environmental pollution and protection of mines, process metallurgy, metallurgical physical chemistry, structure and physical properties of materials, corrosion and resistance of materials, are viewed as suitable for publication.