Monodisperse BaTiO3 microspheres were synthesized using Ba(OH)2, a homemade amorphous TiO2 precursor, and dissolved CO2 as the raw materials. To dissolve sufficient CO2 in the mixing solution, the reaction process was carried out in air. Then, a BaCO3 layer, as a fixed barium source, was coated on the surface of the TiO2 precursor template through a hydrothermal process at 90 °C. Furthermore, the BaCO3 reacted with the TiO2 precursor to form pure BaTiO3 through in situ conversion during subsequent heat treatment at 800 °C. Compared to the commonly used acid soaking method for the removal of BaCO3 after hydrothermal treatment, the method combining in-air mixing with a low hydrothermal temperature and heat treatment yielded BaTiO3 microspheres with a more monodisperse homogenous morphology, which have a greater potential in various applications. This article is protected by copyright. All rights reserved.

中文翻译：

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CO2驱动合成单分散钛酸钡微球

使用自制的无定形 TiO2 前体 Ba(OH)2 和溶解的 CO2 作为原料合成了单分散 BaTiO3 微球。为了在混合溶液中溶解足够的 CO2，反应过程在空气中进行。然后，在 90 ℃下通过水热工艺将 BaCO3 层作为固定的钡源涂覆在 TiO2 前驱体模板的表面。此外，在随后的 800 °C 热处理过程中，BaCO3 与 TiO2 前体反应，通过原位转化形成纯 BaTiO3。与常用的酸浸法去除水热处理后的 BaCO3 相比，空气中混合与低水热温度和热处理相结合的方法得到的 BaTiO3 微球具有更单分散的均匀形态，在各种应用中具有更大的潜力. 本文受版权保护。版权所有。