Title :
Na0.5Bi0.5TiO3-Based Voltage-Tunable Materials
Author :
M. Spreitzer;J. Konig;B. Jancar;D. Suvorov
Author_Institution :
Advanced Materials Department, Jo?ef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia
fDate :
5/1/2007 12:00:00 AM
Abstract :
We have investigated the dielectric tunability of the Na0.5Bi0.5TiO3 relaxor ferroelectric, modified with additions of Li3xLa(2/3)-xTiO3 (0.03lesxges0.167) and NaTaO3. These two additives have characteristics similar to incipient antiferroelectric and ferroelectric materials, respectively. The phase relations in the Na0.5Bi0.5TiO3-Li3xLa(2/3)-xTiO3 system were determined; however, this was made difficult by the slow kinetics and the thermodynamic instability of the compounds from the system. With an additives concentration of close to 10 mol% the material shows a relative dielectric tunability of up to 50%, moderate dielectric losses and a reduced temperature dependence of the dielectric constant, indicating that relaxor ferroelectrics might be promising materials for tunable applications.
Keywords :
"Ferroelectric materials","Dielectric losses","Bismuth","Relaxor ferroelectrics","Additives","Dielectric materials","Kinetic theory","Thermodynamics","Temperature dependence","Dielectric constant"
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Print_ISBN :
978-1-4244-1333-1
Electronic_ISBN :
2375-0448
DOI :
10.1109/ISAF.2007.4393213