Figure - available from: Journal of Inorganic and Organometallic Polymers and Materials
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a Spectra of the real part (M') of the complex modulus, b spectra of the imaginary part (M") of complex modulus, c relaxation time versus the inverse of T
Source publication
The ceramic compound Ba0.97Bi0.02Ti0.9Zr0.05Nb0.04O3 has been fabricated via a molten-salt method to investigate the effect of temperature on the dielectric properties and conduction mechanism. The XRD results suggest that the investigated compound's main phase crystallizes in a pseudo-cubic structure with a space group (Pm − 3 m). The values of th...
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Citations
... At lower frequencies, the Z' and Z" value decreases with increasing temperature, indicating a decrease in resistance and demonstrating a negative temperature coefficient effect (NTCR effect), similar to what is seen in semiconductors [34]. This NTC behavior arises from the continuous accumulation of charges at the two interfaces between the ceramic and the electrodes under high-frequency fields, resulting in conduction behavior similar to that of a parallel-plate capacitor, thus facilitating AC current flow [35]. At the tested temperatures, the Z" value of 0.1SmCo displays a frequency-dependent peak, which diminishes in intensity and shifts toward higher frequencies as temperature increases. ...
