Preparation and characterization of (Ba<inf>0.85</inf>Ca<inf>0.15</inf>)(Zr<inf>0.1</inf>Ti<inf>0.9</inf>)O<inf>3</inf> ceramics by a BaTiO<inf>3</inf> seed-induced method

• Main Authors: Kamnoy M., Hiransit W., Suksri C., Parjansri P., Intatha U., Eitssayeam S.
• Format: Journal
• Published: 2017
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84994667617&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/41263
• Institution: Chiang Mai University

Copyright © 2016 American Scientific Publishers All rights reserved. This research studied the preparation and characterization of (Ba 0.85 Ca 0.15 )(Zr 0.1 Ti 0.9 )O 3 (BCZT) ceramics by a seed-induced method. The seed-induced method serves as a technique using nanocrystals to induce phase formation of a perovskite structure. Firstly, we prepared the BaTiO 3 seeds for the BCZT ceramics by the molten salt method, and we used NaCl:KCl (1:1 by mole) eutectic mixture as the flux and calcined at 750°C. Then, we prepared BCZT ceramics by the solid state method with added content of BT. We calcined the mixed starting powders, including BT seed, at 1200°C for 2 hours and sintered at 1450°C for 4 hours. The results indicated that the BT seed showed a single perovskite phase using a low calcination temperature of 750°C. The average particle size was about 300 nm. The density and average grain size of the BCZT ceramics were 5.41-5.48 g/cm 3 and 7.5 to 15.4 μm, respectively. The highest values for the dielectric constant (ε r ) and piezoelectric constant (d 33 ) were 10876 and 473 pC/N, respectively, for 10 mol% BT-seed-doped BCZT ceramic.