A surfactant-free route to synthesize Ba _x Sr_1−x TiO₃ nanoparticles at room temperature, their dielectric and microwave absorption properties

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• 作者：Qing-Song Wu 吴庆松 ; Jian-Wei Liu 刘建伟 ; Guang-Sheng Wang 王广胜…
• 关键词：perovskite ; crystallization ; dielectric ; microwave absorption ; mixed solution
• 刊名：Science China Materials
• 出版年：2016
• 出版时间：August 2016
• 年：2016
• 卷：59
• 期：8
• 页码：609-617
• 全文大小：3,872 KB
• 刊物类别：Materials Science, general; Chemistry/Food Science, general;
• 刊物主题：Materials Science, general; Chemistry/Food Science, general;
• 出版者：Science China Press
• ISSN：2199-4501
• 卷排序：59

文摘

Perovskite materials, such as Ba_xSr_1−xTiO₃ (BST), have been continuously receiving attentions due to their unique ferroelectric, pyroelectric, dielectric, piezoelectric and electric-optic properties. Here, we report a facile route for the synthesis of BST nanocrystalline materials by fast mixing of MCl₂ (M = Ba, Sr) aqueous solution and titanium isopropoxide ethanol solution at room temperature without using any surfactants or structure-directing templates. The molar ratio of Ba/Sr was controlled by adjusting the original molar ratio of BaCl₂·2H₂O and SrCl₂·6H₂O. The dielectric properties and microwave absorption capability of the BST nanocrystalline were studied. The results indicate that the BST nanocrystalline material has the best dielectric and microwave absorption properties in the case of Ba_0.7Sr_0.3TiO₃. The present strategy is facile, low cost and high yield, which may provide a new route for the synthesis of other perovskite materials.