Room‐Temperature Synthesis of BaTiO₃ Nanoparticles in Large Batches

Abstract

A new method has been developed to synthesize barium titanate (BaTiO3) nanoparticles with a narrow size distribution under ambient conditions at room temperature. The as‐prepared BaTiO3 nanoparticles were characterized by X‐ray diffraction, transmission electron microscopy, high‐resolution TEM, and selected area electron diffraction. On the basis of the characterizations, it was found that the particle size could be easily tuned by adjusting the experimental parameters, such as the solvent component and reaction time. The basicity of the organic solvent was considered to play an important role in the room‐temperature synthesis and the solvent molecules had a strong influence on the crystal growth of BaTiO3 nanoparticles. The BaTiO3 nanoparticles obtained were well dispersed and possessed a cubic perovskite structure at room temperature.

Effect of crystallization on the band structure and photoelectric property of SrTiO3 sol–gel derived thin film

“…Being one of the most typical materials, SrTiO 3 (STO) has been extensively investigated as oxygen-sensing materials [1,2] and superconducting substrate materials [3] owing to its unique properties. In addition, STO as a stable n-type semiconductor material has extensive applications in photoelectrochemical (PEC) water splitting [4] and photocatalytic degradation of organic compounds [5]. However, the wide band gap of STO (3.2 eV) [6] makes it less efficient under visible light irradiation.…”

Low-temperature syntheses of cubic BaTiO₃ nanoparticles in highly basic aqueous solution

“…We clarified the essential reaction conditions, such as the basicity, temperature and reaction period, for the formation of cubic BaTiO 3 without impurity phases in aqueous systems. Organic additives reported in a previous paper 12) are not required for the formation. Moreover, we found the production of mesocrystal BaTiO 3 as an intermediate phase for the formation of crystalline particles.…”

Synthesis of submicron BaTiO3 particles by modified solid-state reaction method

“…When its grain size in bulk body is 0.6-0.8 m, the properties are generally optimal [3]. Accordingly, one should use BaTiO 3 particles of 100-200 nm as the starting material taking into account the grain growth that occurs during the sintering process [4][5][6]. Conventional solid-state reaction is one of the most commonly used synthetic methods for fabricating pure BaTiO 3 particles; however, it often requires a high calcination temperature to obtain pure BaTiO 3 phase and the final product is usually coarse and seriously agglomerated which fails to satisfy industrial needs.…”