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K. SAMBASIVA RAO1,* , D. MADHAVA PRASAD1, P. MURALI KRISHNA1, T. SWARNA LATHA1, JOON HYUNG LEE2
Lead potassium dysprosium niobate (PKDN) has been prepared by a standard conventional ceramic route. Material formation has been confirmed by X-ray diffraction (XRD) studies. The variation of dielectric constant with temperature is explained considering the space-charge polarization. Complex impedance spectroscopy (CIS) analysis has been carried out to investigate its electrical properties as a function of frequency and temperature. CIS analysis has indicated the electrical behavior of the material sample shows negative temperature coefficient of resistance (NTCR) typical to a semiconductor behavior. Impedance studies indicated the presence of temperature dependant relaxation process in the material with a spread of relaxation time. Modulus analysis reveals the possibility of hopping mechanism for electrical processes in the system. The frequency dependant ac conductivity at different temperatures showed the conduction process is thermally activated process.
Ceramics, Solid-state reaction, X-ray diffraction, Ferroelectric, Piezoelectric, Impedance, Electric modulus, Conductivity.
K. SAMBASIVA RAO, D. MADHAVA PRASAD, P. MURALI KRISHNA, T. SWARNA LATHA, JOON HYUNG LEE, Electrical and electromechanical studies on tungstenbronze electroceramic: lead potassium dysprosium niobate, Optoelectronics and Advanced Materials - Rapid Communications, 1, 10, October 2007, pp.510-519 (2007).
Submitted at: Aug. 16, 2007
Accepted at: Aug. 30, 2007
Optoelectronics and Advanced Materials - Rapid Communications
(2024): Impact Factor = 0.4 - Journal Citation Reports (Clarivate Analytics, 2025)
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