Microwave heated lead cobalt titanate nanoparticles synthesized by sol-gel technique: Structural, morphological, dielectric, impedance and ferroelectric properties

• Published in: Materials science & engineering. B, Solid-state materials for advanced technology Vol. 242; pp. 23 - 30
• Main Authors: Kumar, N. Suresh, Suvarna, R. Padma, Babu Naidu, K. Chandra
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.03.2019; Elsevier BV
• Subjects: Cobalt; Crystallites; Dielectric loss; Dielectric properties; Electric fields; Electrical conduction; Electrical conductivity; Electrical resistivity; Ferroelectric materials; Ferroelectricity; Field emission; Frequency analysis; Impedance; Impedance spectroscopy; Microscopes; Microwaves; Morphology; Nanoparticles; Scanning electron microscopy; Sol-gel processes; Synthesis; X-ray diffraction; Nanoparticles; X-ray diffraction; Electrical conductivity; Impedance spectroscopy; Microwaves
• ISSN: 0921-5107; 1873-4944
• DOI: 10.1016/j.mseb.2019.03.005

Temperature dependence of dielectric constant. [Display omitted] •The PCT nanoparticles were prepared by sol-gel & microwave heating method.•The frequency and temperature dependence of electrical properties are studied.•Nyquist plots are drawn to evaluate grain and grain boundary behaviour.•The ferroelectric transition was noticed at 683 K in the ε′ versus temperature plot.•The P-E loops were discussed as a function of temperature. The lead cobalt titanate nanoparticles were synthesized via the sol-gel technique followed by microwave heating at 750 °C for 45 min. The X-ray diffraction study revealed the formation of tetragonal PbCoTiO3 phases. The average crystallite size was found to be 26 nm. The surface morphology was examined using field emission scanning and transmission electron microscopes. The dielectric properties such as dielectric constant (ε′), dielectric loss (ε″), ac-conductivity (σac), real (M′) and imaginary part (M″) of dielectric modulus were investigated as a function of temperature and frequency. The impedance analysis was carried out using Cole-Cole plots to elucidate the electrical conduction mechanism. The ferroelectric behavior of PCT was described by polarization versus input electric field (P-E) loop as a function of temperature.