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7142849 
Journal Article 
Structural, Electrical, and AC-Resistivity Studies of BNT-KN Piezoelectric Ceramics 
Pattipaka, S; Bora, S; Pamu, D; , 
2020 
Yes 
Ferroelectrics
ISSN: 0015-0193 
TAYLOR & FRANCIS LTD 
ABINGDON 
28-42 
WOS:000526425600004 
The lead-free (1 - x) Bi0.5Na0.5TiO3 - x KNbO3 (BNT-KN; x = 0 - 0.12) composite ceramics have been synthesized by a sol-gel process. Their structure, morphology, AC conductance and dielectric response were studied systematically. The X-ray diffraction patterns of BNT-KN revealed a morphotropic phase boundary between a rhombohedral and a pseudocubic structure. The temperature-dependent dielectric response of pure BNT revealed two-phase transitions at 200 degrees C (TR-T or T-d) and 320 degrees C (T-C). Furthermore, the critical temperatures were found to shift to lower values with increasing KN concentration. The manifested relaxor behavior was well confirmed by a modified Curie - Weiss law. The hopping conduction mechanism in BNT-KN was characterized through AC-resistivity analysis.