Dielectric properties of Li0.003Na0.997NbO3 ceramics

• Published in: Ferroelectrics Vol. 216; no. 1; pp. 53 - 61
• Main Authors: Śmiga, W., Konieczny, K., Kuś, Cz, Burzyńska, M.
• Format: Journal Article
• Language: English
• Published: London Taylor & Francis Group 01.08.1998; Taylor and Francis
• Subjects: 0.003; 0.997; ceramics; Condensed matter: electronic structure, electrical, magnetic, and optical properties; dielectric properties; Dielectric properties of solids and liquids; Dielectric, piezoelectric, ferroelectric and antiferroelectric materials; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; local dipoles; NbO; Niobates, titanates, tantalates, pzt ceramics, etc; Permittivity (dielectric function); Physics; Pyroelectric and electrocaloric effects; Temperature dependence; Frequency dependence; Inorganic compounds; Transition element compounds; Lithium niobates; Sodium niobates; Pyroelectricity; Experimental study; Quaternary compounds; Permittivity
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150199808018227

Temperature, frequency and time dependencies of dielectric permittivity and pyroelectric current of Li 0.003 Na 0.997 NbO 3 ceramics have been presented. Investigation of the pyroeffect reveals the existence of the local dipoles in a temperature range above the temperature of the maximum of the dielectric permittivity, T m . The observed dispersion of the dielectric permittivity for this material and its time dependence, can be connected with the existence of these dipoles. The occurrence of these dipoles can be associated with a large local deformation accompanying the substitution of individual Li-by Na-ions and with imperfections of the polycrystal.