Lowering Synthesis Temperature of BaTiO3-Bi(Zn0.5Zr0.5)O3 Ceramics by Salt Flux Assistance and Dielectric Properties Investigations

• Published in: Integrated ferroelectrics 2022-01, Vol.223 (1), p.162-172
• Main Authors: Triamnak, Narit, Wongdamnern, Natthapong, Sareein, Thanapong, Ngamjarurojana, Athipong, Yimnirun, Rattikorn
• Format: Article
• Language: English
• Subjects: barium titanate; Barium titanates; Bismuth; Ceramics; Chemical synthesis; Curie temperature; Dielectric; Dielectric properties; Grain size; Lead free; Perovskite structure; Perovskites; Phase transitions; Reagents; Roasting; salt; Solid solutions; zirconate
• ISSN: 1058-4587; 1607-8489
• DOI: 10.1080/10584587.2021.1964295

Phase formations and dielectric properties of lead free barium titanate bismuth zinc zirconate, BaTiO 3 -Bi(Zn 0.5 Zr 0.5 )O 3 (BT-BZZ), were comparatively investigated between two different synthesis routes, solid state reaction and salt flux assistance methods. The perovskite (1-x)BT-(x)BZZ ceramics, where x = 0.02, 0.05 and 0.10, were synthesized by using reagent grade oxides and the NaCl salt was used as a surface active agent to lower the calcination temperature. Phase formations were examined by X-ray diffraction technique (XRD). It was found that the solid solutions of (1-x)BT-(x)BZZ can be obtained with lower temperature at least 200 °C via salt flux assistance method. The NaCl salt addition could result in single phase of perovskite structure at every compositions with the calcination temperature as low as 800 °C. Dielectric measurements revealed that the Curie temperature (T c ) shifted to lower temperature with increase of BZZ concentration. Moreover, the dielectric behavior transformed to diffuse phase transition when x = 0.1. The samples prepared via salt flux assistance method exhibited smaller grain size which were revealed by scanning electron microscope. In addition, P-E hysteresis measurements illustrated the higher high E-field dielectric constant with the narrower P-E loop when the salt flux was applied.