Microwave assisted sol-gel synthesis of high dielectric constant CCTO and BFN ceramics for MLC applications | Zendy

S. Sonia | Zendy; M. Chandrasekhar | Zendy; Pawan Kumar | Zendy

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Microwave assisted sol-gel synthesis of high dielectric constant CCTO and BFN ceramics for MLC applications

Author(s) -

S. Sonia,

M. Chandrasekhar,

Pawan Kumar

Publication year - 2017

Publication title -

processing and application of ceramics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.326

H-Index - 15

eISSN - 2406-1034

pISSN - 1820-6131

DOI - 10.2298/pac1702154c

Subject(s) - materials science , ceramic , calcination , dielectric , microwave , sol gel , sintering , dielectric loss , composite material , high κ dielectric , relaxation (psychology) , analytical chemistry (journal) , nanotechnology , optoelectronics , chromatography , catalysis , psychology , chemistry , physics , quantum mechanics , social psychology , biochemistry

Ba(Fe1/2Nb1/2)O3 (BFN) and CaCu3Ti4O12 (CCTO) ceramic powders were synthesized by microwave assisted sol-gel synthesis technique and sintered at 1100°C and 1000°C, respectively. Calcination and sintering processes were carried out in a microwave furnace. Dielectric constant (εr)~2450 and dielectric loss (tan δ)~0.5 at frequency of 1 kHz and 20°C were observed for the BFN ceramic samples. Higher value of εr ~ 3600 and lower value of tan δ ~ 0.07 at frequency of 1 kHz and in 20-60°C temperature range for the CCTO ceramic samples suggested its utility for MLC applications. Sharp decrease of εr and sharp increase of tan δ at higher frequencies of BFN ceramic samples indicated the presence of Debye like relaxation

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