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Erschienen in:
26.10.2015
Effect of MnO2 on structural and electrical characteristics of Ba0.5Sr0.5TiO3
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 1/2016
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Abstract
As the variable dielectric constant, loss and some electric characteristics over the frequency and temperature band of operation make a material unsuitable for some devices, an attempt has been made through this work to obtain frequency–temperature independence of said parameters by suitable addition of metal oxide (MnO2) in lead-free ferroelectric (BaSr) TiO3 in the band of interest. The doping concentration of the oxide in Ba0.5Sr0.5TiO3 has been optimized for the purpose. The doping of manganese oxide reduces the loss by compensating the oxygen vacancies and the structural defects. With variable doping concentration of MnO2 dielectric loss is brought down to an acceptable limit (<10−3). Impedance and modulus spectroscopy of the prepared materials provide an insight into the electrical processes involved in it. The AC/DC conductivity analysis provides loss-conductivity spectrum for device utilization.