Comprehensive investigation of structural,dielectric and local piezoelectric properties of KNN ceramics
作者机构：Department of PhysicsACBS Eternal UniversityBaru Sahib 173101 Himachal PradeshIndia Department of PhysicsGuru Nanak Dev University Amritsar 143005India Scientific-Practical Materials Research Centre of NAS of Belarus Minsk 220072BelarusIndia National Research University of Electronic Technology“MIET”Zelenograd 124498MoscowRussia TEMA-NRDMechanical Engineering Department and Aveiro Institute of Nanotechnology(AIN)University of AveiroAveiro 3810-193Portugal
出 版 物：《Journal of Advanced Dielectrics》 (先进电介质学报（英文）)
年 卷 期：2019年第9卷第2期
页 面：33-44页
学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0817[工学-化学工程与技术] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：the DST(INT/RUS/RFBR/P-299)New Delhi RFBR(#17-58-45026 IND_a)Moscow for financial support
主 题：KNN dielectric properties X-ray diffraction(XRD) NTCR PFM
摘 要：In this research paper,we utilized the traditional high-temperature solid-state reaction method to fabricate the K_(0.495)Na_(0.520)NbO_(3),K_(0.480)Na_(0.535)NbO_(3)and K_(0.475)Na_(0.540)NbO_(3)(abbreviated as KNN-1,KNN-2,and KNN-3,respectively)lead-free ion deficient ceramics for understanding the influence of ionic deficiency on the crystalline structure and dielectric/piezoelectric properties of the samples.X-ray diffraction patterns of these samples exhibited a perovskite tetragonal *** anomalies around 287℃and 471℃were identified as ferroelectric to ferroelectric and ferroelectric to paraelectric-transition temperatures for KNN-2 at 1 *** was found that the composition KNN-2 exhibit relatively high Curie temperature i.e.,471℃.The conductivity plots confirm that the activation energies are *** impedance behavior in our ceramic samples can be analyzed with the bulk/grain *** slope of Z′with temperature shows negative temperature coefficient of resistance(NTCR)type behavior in proposed KNN ceramics material.
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