Characterization of relaxor ferroelectrics from BiFeO3 doped (K0.5Na0.5)NbO3 systems

Content Provider	Scilit
Author	Nuraini, U. Triyuliana, N. A. Mashuri, M. Suasmoro, S.
Copyright Year	2019
Description	Journal: Iop Conference Series: Materials Science and Engineering The additon of $BiFeO_{3}$ (BFO) to $(K_{0.5}Na_{0.5})NbO_{3}$ (KNN) systems and termed as (l-x)KNN-xBFO for x=0 and x=0.075 were successfully synthesised using a combination of solid-state reaction and auto-combustion methods. The single phase of KNN-BFO was formed by two step of heat threatments; it is calcined at 575 °C for 6h then sintered at 1100 °C for 6h. The phase structure of KNN material changes from the orthorombic symmetry to tetragonal symmetry after the addition of BFO. The relaxor ferroelectric properties were carried out using impedance analyzer at various temperature and frequency. The pure KNN shows a typical ferroelecrics that has two Curie temperature at 220 °C (orthorombic-tetragonal transition) and 440 °C (tetragonal-cubic transition). After the 7.5%mol.BFO doped in the KNN system, the maxima peak around Tc becomes broader and its transition temperature becomes invisible then has a relaxor behaviours. The Currie-Weiss law is used to prove the ferroelectric of KNN (γ≤1) and relaxor of KNN-BFO (γ≥1).
Related Links	https://iopscience.iop.org/article/10.1088/1757-899X/496/1/012043/pdf
ISSN	17578981
e-ISSN	1757899X
DOI	10.1088/1757-899x/496/1/012043
Journal	Iop Conference Series: Materials Science and Engineering
Issue Number	1
Volume Number	496
Language	English
Publisher	IOP Publishing
Publisher Date	2019-05-07
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Materials Science and Engineering
Content Type	Text
Resource Type	Article