Open AccessEffect of modified two-step sintering approaches on Potassium Tantalum Niobate-Barium Titanate (KTN-BT) ceramics and their dielectric and piezoelectric properties
Author(s) -
Gambheer Singh Kathait,
Maheswar Panda,
N. S. Panwar
Publication year - 2020
Publication title -
science of sintering/science of sintering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.309
H-Index - 25
eISSN - 1820-7413
pISSN - 0350-820X
DOI - 10.2298/sos2001097k
Subject(s) - materials science , sintering , dielectric , piezoelectricity , microstructure , ceramic , piezoelectric coefficient , tantalum , barium titanate , composite material , potassium niobate , titanate , permittivity , mineralogy , relative permittivity , relative density , dielectric loss , ferroelectricity , metallurgy , optoelectronics , chemistry
The Potassium Tantalum Niobate-Barium Titanate (KTN-BT) solid solution system ceramics with the composition 0.02K(Ta0.5Nb0.5)O3?0.98BaTiO3 were prepared by a two-step sintering mechanism, for different sintering durations. Crystalline and microstructure analyses of the prepared samples were performed. Dielectric and piezoelectric properties were also investigated. Moreover, apparent piezoelectric constant d33 was measured using the slope of strain vs. electric field curves for these ceramics. It was observed that the high values of density, electrical conductivity, relative dielectric permittivity (?r = 3615.983), piezoelectric coefficient (d33 = 315 pm/V) and remnant polarization (Pr = 9.53 ?C/cm2) were obtained for ceramics prepared through a new variation of the conventional two-step sintering method. Finally, the relationship between sintering mechanism, microstructure and piezoelectricity was discussed for the 0.02K(Ta0.5Nb0.5)O3?0.98BaTiO3 ceramics.