Controlling Composite TiO<sub>2</sub> Powder Characteristics in the Solid-State Synthesis of BaTiO<sub>3</sub> Powders for Improved Sintering and Permittivity: A Comparative Study

oleh: Sang-Heun Lee, Yoon-Seok Lee, Jandi Kim, Ji-Hye Seo, Myunghee Cho, Hun Kwak, Ran-Sae Cheon, Seungchan Cho, Yangdo Kim, Kyoung-Seok Moon, Moonhee Choi

Format: Article
Diterbitkan: MDPI AG 2023-08-01

Deskripsi

In this study, the anatase–rutile phase fraction of TiO<sub>2</sub>, which would play a vital role in the solid-state synthesis of BaTiO<sub>3</sub>, was controlled to form a composite phase. The composite TiO<sub>2</sub> was applied to a solid-state synthesis reaction, and the tetragonality, dielectric properties, and microstructure of the resulting BaTiO<sub>3</sub> powders were analyzed under different synthesis conditions of TiO<sub>2</sub>. Furthermore, a comparative analysis of solid-state-synthesized BaTiO<sub>3</sub> powders prepared using anatase, rutile, and mixed (anatase + rutile) TiO<sub>2</sub> was performed to elucidate the mechanism of improvement in the sintering behavior and dielectric properties of the BaTiO<sub>3</sub> powder synthesized using the composite TiO<sub>2</sub>. As a result of applying composite TiO<sub>2</sub>, BaTiO<sub>3</sub> powder with excellent tetragonality was synthesized. In addition, it is effective in powder growth and the control of powder morphology, so sintering and dielectric properties can be improved at relatively low temperatures.