TY - GEN
T1 - Crystal structure and electrical properties of (1-x)(ba0.85sr0.15)tio3-x(k0.5na0.5)nbo3 system
AU - Nuraini, Umi
AU - Kaukaba, Yhuanita Nurul
AU - Mashuri,
AU - Suasmoro,
N1 - Publisher Copyright:
© 2019 Trans Tech Publications Ltd, Switzerland.
PY - 2019
Y1 - 2019
N2 - The composition of (1-x)(Ba0.85Sr0.15)TiO3 – x(K0.5Na0.5)NbO3 (BST-KNN) for x= 0.1 and x= 0.2 were successfully prepared by two separate synthesis namely oxalate co-precipitation (for BST) and solid-state reaction (for KNN). Sintered pellet at 1200°C for 2h exhibits a single phase except for x= 0.2 showing a secondary phase which was identified as Ba2TiO4. KNN doped BST system show tetragonal symmetry in which higher dopant expand its tetragonality (c/a). The densities of sintered samples deduced by Archimedes method are slightly higher than 90%. Permittivity measurements as function of temperature show almost similar TC= 90°C at frequency of 1.273 kHz and shift to higher temperature as frequency increases indicating a typical relaxor characteristics. At room temperature the relative permittivity showing Debye relaxation characteristic with ωr= 12560 (x= 0.1) and ωr= 20096 (x= 0.2). Furthermore, as function of temperature the activation energy deduced from relaxation time was obtained to be Ea= 0,564 eV for x= 0.1 and 0,58 eV for x=0.2.
AB - The composition of (1-x)(Ba0.85Sr0.15)TiO3 – x(K0.5Na0.5)NbO3 (BST-KNN) for x= 0.1 and x= 0.2 were successfully prepared by two separate synthesis namely oxalate co-precipitation (for BST) and solid-state reaction (for KNN). Sintered pellet at 1200°C for 2h exhibits a single phase except for x= 0.2 showing a secondary phase which was identified as Ba2TiO4. KNN doped BST system show tetragonal symmetry in which higher dopant expand its tetragonality (c/a). The densities of sintered samples deduced by Archimedes method are slightly higher than 90%. Permittivity measurements as function of temperature show almost similar TC= 90°C at frequency of 1.273 kHz and shift to higher temperature as frequency increases indicating a typical relaxor characteristics. At room temperature the relative permittivity showing Debye relaxation characteristic with ωr= 12560 (x= 0.1) and ωr= 20096 (x= 0.2). Furthermore, as function of temperature the activation energy deduced from relaxation time was obtained to be Ea= 0,564 eV for x= 0.1 and 0,58 eV for x=0.2.
KW - BST-KNN
KW - Crystal structure
KW - Defect Structure
KW - Ferroelectric-Relaxors
UR - http://www.scopus.com/inward/record.url?scp=85071941422&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.966.8
DO - 10.4028/www.scientific.net/MSF.966.8
M3 - Conference contribution
AN - SCOPUS:85071941422
SN - 9783035714968
T3 - Materials Science Forum
SP - 8
EP - 13
BT - Functional Properties of Modern Materials II
A2 - Darminto, null
A2 - Kurniawan, Budhy
A2 - Risdiana, null
A2 - Watanabe, Isao
A2 - Nugroho, Agustinus Agung
PB - Trans Tech Publications Ltd
T2 - 4th International Conference on Functional Materials Science, ICFMS 2018
Y2 - 13 November 2018 through 15 November 2018
ER -