Effects of BaTiO<inf>3</inf>doped on structural and dielectric properties of Bi<inf>0.5</inf>(Na<inf>0.80</inf>K<inf>0.20</inf>)<inf>0.5</inf>TiO<inf>3</inf>ceramic

• Main Authors: Manlika Kamnoy, Krit Sutjarittangtham, Piewpan Parjansri, Uraiwan Intatha, Sukum Eitssayeam, Natthaphon Raengthon
• Format: Journal
• Published: 2018
• Subjects: Materials Science; Physics and Astronomy
• Online Access: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85026654265&origin=inward; http://cmuir.cmu.ac.th/jspui/handle/6653943832/57480
• Institution: Chiang Mai University

© 2017 Taylor & Francis Group, LLC. We studied the effects of BaTiO3(BT) seed nano-crystals on dielectric properties and phase transition behavior of Bi0.5(Na0.8K0.2)0.5TiO3(BNKT) ceramics. The BaTiO3seed nano-crystals were used as nuclei, which acted as templates for starting materials to form perovskite phase. In this study, the BT seed nano-crystals were prepared by the molten salt technique. Eutectic mixtures of NaCl-KCl (1:1 by mole) were used as the flux. Various concentrations of BT seed nano-crystals were mixed with other precursors required for formation of BNKT phase, which was prepared by the solid-state method. Addition of BT seed nano-crystals enhanced the electrical properties of ceramics. The sample with 8 mol% BT seed nano- crystals exhibited highest value of dielectric constant (ϵr) at maximum temperature of 6700. The grain size significantly decreased with increasing concentration of BT seed nano-crystals. The relaxor ferroelectric behavior was also observed with the diffuseness parameter (γ) value being close to 2.