Preparation of Nanocrystalline BaTiO3 Powders, Fibers, and Thin Films From the Same Precursor Solution
Preparation of Nanocrystalline BaTiO3 Powders, Fibers, and Thin Films From the Same Precursor Solution
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DOI：
10.1111/j.1551-2916.2010.03644.x
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发表时间：
2010-07
影响因子：
3.9
通讯作者：
R. Das;P. Pramanik
中科院分区：
文献类型：
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作者：
R. Das;P. Pramanik
本文讨论了一种改进的溶胶-凝胶法，该方法可以制备纳米BaTiO 3粉体、纤维和薄膜。该方法涉及制备稳定的前体溶液，其含有乙酸钡和异丙醇钛各自的乙酸盐水溶液，其中乙酸钡和异丙醇钛用作前体，乙酸水溶液用作溶剂。用该前驱体溶液制备的凝胶在550°C/2 h下煅烧，得到纳米晶BaTiO 3，其相应的平均X射线粒度为15 nm。在薄膜的情况下，通过旋涂将前体溶液直接沉积在硅或玻璃基板上。纳米晶BaTiO 3粉末分散到前体溶液中，以产生厚的、无裂纹的颗粒膜。用植物纤维（黄麻）浸渍BaTiO_3纤维制备了BaTiO_3纤维.将植物纤维经浸泡干燥后进行热处理，制得钛酸钡纤维.颗粒，纤维，和薄膜表面的透射电子显微镜和扫描电子显微镜分析。总而言之，这是从同一前体溶液开发多种结构的新方向。
This paper discusses a modified sol-gel process, which can prepare nanocrystalline BaTiO 3 powders, fibers, and thin fihns. This process involved the preparation of stable precursor solutions containing the respective aqueous acetate solution of barium acetate and titanium isopropoxide where barium acetate and titanium isopropoxides were used as precursors and aqueous acetic acid was used as a solvent. The gel prepared using this precursor solution was calcined at 550°C/2 h to produce nanocrystalline BaTiO 3 with the corresponding average X-ray particle size of ∼ 15 nm. In case of thin film, precursor solution was directly deposited on silicon or glass substrates by spin coating. Nanocrystalline BaTiO 3 powders were dispersed into the precursor solution to produce a thick, crack-free particle film. We have also prepared BaTiO 3 fibers by soaking plant fiber (Jute) in the precursor solution. Heat treatment of soaked and dried plant fiber produces BaTiO 3 fibers. Particle, fiber, and film surfaces were characterized by transmission electron micrograph and scanning electron micrograph analysis. Altogether, this is a new direction for the development of multiple structures from the same precursor solution.