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Ferroelectrics Volume 481, 2015 - Issue 1
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Articles

Ferroelectric Fatigue of KNN Ceramics

B. TahSensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India
,
S. GoswamiSensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India
,
T. DasguptaSensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India
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J. BeraDepartment of Physics, National Institute of Technology, Rourkela, Orissa, 769008, India
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P. SinhaAnalytical Chemistry Department, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India
,
D. KunduAnalytical Chemistry Department, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India
,
S. SenSensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, IndiaCorrespondence[email protected] [email protected]
&
A. SenSensor and Actuator Division, CSIR-Central Glass and Ceramic Research Institute, Kolkata, 700032, India
 show all
Pages 119-125 | Accepted 03 Dec 2014, Published online: 01 Sep 2015
 
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Abstract

Phase-pure KNN (K0.5Na0.5NbO3) was synthesized from Rochelle salt and niobium pentoxide through solid-state route and the synthesized powder was sintered at 1130°C to get dense KNN ceramics. After polarization fatigue test, it was found that the d33, kP and remanent polarization (Prem) of KNN decreased substantially. The reduction of the aforesaid parameters after fatigue was much higher in comparison to that of soft PZT (Navy type VI) tested under identical conditions. The possible reason behind such behaviour has been delineated.

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