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Synthesis and investigation of properties of nanostructured cubic PMN ceramics for possible applications in electronics
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Synthesis and investigation of properties of nanostructured cubic PMN ceramics for possible applications in electronics
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Journal Article
Synthesis and investigation of properties of nanostructured cubic PMN ceramics for possible applications in electronics
2020
Overview
The pure phase of Pb(Mg
1/3
Nb
2/3
)O
3
was synthesized by two-stage chemical process at 800 °C. Thermal analysis of precursors was done by TG-DSC. XRD, Raman spectroscopy, FESEM and HRTEM analyses were done to characterize synthesized material and also to observe the microstructure. XRD studies revealed the formation of pure crystalline PMN ceramics (JCPDS PDF# 00-081-0861) having crystallite size around 28 nm. The particle size was examined to be around 19 nm by HRTEM. The nanocrystalline PMN ceramics exhibited a bandgap around 3.28 eV using diffuse reflectance spectroscopy. Dielectric nature was inspected using impedance analyzer between 40 Hz and 110 MHz. Dielectric constant (
ϵ
r
) and
tan
δ
were investigated where unusual negative values of
ϵ
r
were observed beyond 41.26 MHz. A peak in
tan
δ
near 41.26 MHz was also obtained.
Publisher
Springer US,Springer Nature B.V
