Dielectric, impedance and electromechanical studies on [Ba(Nd0.1Ti0.8Nb0.1)O3]1-y[Na0.5Bi0.5TiO3]y relaxor ceramics prepared through conventional and microwave sintering route

[Ba(Nd 0.1 Ti 0.8 Nb 0.1 )O 3 ] (1-y) [Na 0.5 Bi 0.5 TiO 3 ] y ceramics were prepared through solid state sintering (CS) and microwave sintering (MWS) route. The XRD results indicate that the ceramic samples have a cubic structure at room temperature. The dielectric, electromechanical and piezoelect...

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Bibliographic Details
Published in:Ferroelectrics 2017-01, Vol.506 (1), p.63-75
Main Authors: Mahboob, Syed, Rizwana,  , Prasad, G., Kumar, G. S.
Format: Article
Language:English
Subjects:
Bismuth titanate
Ceramics
Dielectric properties
Dielectric relaxation
Dielectrics
electromechanical coupling factors
Microstructure
Microwave sintering
Microwaves
Phase transitions
Piezoelectricity
Relaxor ceramics
Relaxors
Room temperature
Sintering
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Summary:[Ba(Nd 0.1 Ti 0.8 Nb 0.1 )O 3 ] (1-y) [Na 0.5 Bi 0.5 TiO 3 ] y ceramics were prepared through solid state sintering (CS) and microwave sintering (MWS) route. The XRD results indicate that the ceramic samples have a cubic structure at room temperature. The dielectric, electromechanical and piezoelectric properties were also investigated. Relaxor behaviour was observed for the present ceramic samples prepared through both the sintering routes. The degree of diffusiveness of phase transition and relaxor behaviour are more for CS ceramic when compared to MWS ceramic with y = 0.40. From modulus measurements, the values of K t , K eff and d 33 at 623 K were 0.99983, 0.99980 and 5.273 nm.V −1 respectively for MWS ceramic with y = 0.25. The piezoelectric constant (d 33 ) decreased with the increase of temperature. The d 33 values are higher for the microwave sintered ceramic samples when compared to conventional sintered ceramic samples.
ISSN:0015-0193
1563-5112
DOI:10.1080/00150193.2017.1282252