Open AccessInfluence of Nb and Zr co-doping on the structural, morphological and dielectric properties of CaCu3Ti4O12 ceramics
Author(s) -
M.K. Hasan,
S H Shant,
MUl Islam,
Muhammad E. Haque
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1045/1/012004
Subject(s) - dielectric , materials science , ceramic , doping , microstructure , grain size , dielectric loss , analytical chemistry (journal) , phase (matter) , mineralogy , composite material , chemistry , optoelectronics , organic chemistry , chromatography
In this work, CaCu 3 Ti 3.8-x Nb 0.2 Zr x O 12 (where x=0.0, 0.05, 0.1, 0.2) ceramics were made using the normal solid-state reaction method to assess the influence of Nb 5+ & Zr 4+ codoping on the structure, morphology and electrical properties of CaCu 3 Ti 4 O 12 ceramics. Reitveld refinement by Fullprof package was done to achieve the structural information. No phase transformation was observed upon doping. The CCTNZO ceramics occupied a finegrained microstructure with grain sizes ranges from 0.26-0.33 μm. Furthermore, grain size uniformity was enhanced with gradual doping of Zr 4+ ion. within the meantime, the CCTNZO ceramics unfolds extensive durability of dielectric constant over a good range of frequency and also shows a lower loss factor. Doping resulted during a gradual decrease in grain sizes and a dielectric loss at low and high frequency. It had been found that 10% of Zr doped CCTNZO ceramics has the very best dielectric constant (3655) at 0.1 kHz. Meanwhile, rock bottom dielectric loss of 0.241 at 0.1 kHz was observed for 20% Zr doped CCTNZO ceramics.