Structural and Ferroelectric Properties of Na2Pb2Nd2W2Ti4Ta4O30 Ceramic.

A new tungsten bronze ceramic sample Na₂Pb₂Nd₂W₂Ti₄Ta₄O₃₀ was prepared by a high-temperature solid-state reaction technique. X-ray diffraction studies of the compound showed the formation of single-phase orthorhombic crystal structure at room temperature. Surface morphology of the compound was studied by scanning electron microscope (SEM). Study of dielectric properties ([variant_greek_epsilon]_r, tanδ) of the compound at different frequencies (1, 10, 100 kHz and 1 MHz) in a wide temperature range (300-700 K) shows ferroelectric phase transition of diffused type at 400K. [ABSTRACT FROM AUTHOR]