Structural and Dielectric Properties of Na0.99Li0.01NbO3 Ceramics

• Published in: Ferroelectrics Vol. 345; no. 1; pp. 39 - 44
• Main Authors: Śmiga, W., Garbarz-Glos, B., Suchanicz, J., Dambekalne, M., Stenberg, A., Stopa, G., Kuś, C.
• Format: Journal Article
• Language: English
• Published: London Taylor & Francis Group 01.01.2006; Taylor and Francis
• Subjects: 77.80-e; 77.80Bh; 77.84Dy; axial pressure; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; dielectric and microstructural properties; Dielectric properties of solids and liquids; Dielectrics, piezoelectrics, and ferroelectrics and their properties; Exact sciences and technology; Inorganic compounds; LiNbO; NaNbO; Permittivity (dielectric function); Physics; solid solutions; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; NaNbO3-LiNbO3; Lithium oxides; Sodium oxides; Inorganic compounds; XRD; Domain structure; Permittivity; Crystal structure; Defect density; Symmetry property; Phase transformations; Phase shift; Dielectric properties; Transition element compounds; Perovskites; Experimental study; Solid solutions; dielectric and microstructural properties; Anisotropy; Thermal hysteresis; Solid state reaction; Niobium oxides; Orthorhombic lattices; axial pressure; Microstructure
• ISSN: 0015-0193; 1563-5112
• DOI: 10.1080/00150190601020925

Na 0.99 Li 0,01 NbO 3 ceramics were prepared by solid-state reaction method. The samples were characterized by X-ray diffraction, microstructure and dielectric permittivity measurements. The X-ray diffraction analysis showed that samples have a single phase of perovskite structure with orthorhombic symmetry. Microstructure investigations revealed crystalline structures in grains. It was found that dielectric properties of Na 99 Li 0.01 NbO 3 ceramic are sensitive to the applied axial pressure. This includes the shift of phase transformation, diffuseness of the ϵ (T) profile and reduction of the thermal hysteresis. These effects can be caused by change in domain structure and anisotropy of crystallities, the change of inter-ionic distances and change in density of defects under the action of axial pressure.