Sonochemical activation in aqueous medium for solid-state synthesis of BaTiO3 powders

Ultrasonics Sonochemistry

卷:82

Young Soo Lim¹  Hae Won Lee¹  Na Won Kim¹  Woo Hyun Nam² 

[1] Department of Smart Green Technology Engineering, Pukyong National University, Busan 48513, Republic of Korea;

[2] Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology, Jinju 52851, Republic of Korea;

关键词: Sonochemical activation;    BaTiO3;    Powder;    Solid-state synthesis;   

DOI  :  

来源: DOAJ

【 摘 要 】

BaTiO3-based oxide compounds are important ceramic materials for multilayer ceramic capacitors. In this paper, we report a sonochemical activation process of BaCO3 and TiO2 in an aqueous medium for the synthesis of BaTiO3 powders through a solid-state process. Owing to the physical and chemical effects of the ultrasonication in aqueous medium on the raw materials, BaTiO3 powders could be successfully synthesized at relatively low temperatures through a solid-state reaction, which was significantly enhanced as compared to the case in ethanol medium. Detailed investigations on the resulting BaTiO3 powders and ceramics were performed, and a model to understand the role of aqueous medium on the enhancement of the solid-state reaction was proposed in terms of Ba2+ ion leaching and zeta potential of TiO2, which are strongly affected by the pH of the aqueous medium. Our results are not only helpful for cost-effective synthesis of BaTiO3 through the highly reliable solid-state reaction process, but they also provide an understanding of the role of aqueous medium for the sonochemical process using raw materials with partial solubility in water.

【 授权许可】

Unknown