Structural and Dielectric Properties of PMN-PT (65/35) Bulk Ceramics Synthesized by Metal-Polymer Gel Auto Ignition Route
Ultra-fine PMN-PT (65/35) powder was synthesized following a polymer precursor based chemical synthesis technique. The auto-ignited powder containing negligible amounts of carbonaceous residue (∼0.6 wt%) could be sintered directly without any further calcination. A mixture of perovskite and pyrochlore phase was detected in the auto-ignited powder by XRD analysis. The amount of pyrochlore phase decreased with increasing the annealing temperature and pure perovskite phase was obtained in the sample at 950°C. Scanning electron microscopy of the uniaxially pressed and sintered samples revealed the rectangular shaped grains. The dielectric properties of the sintered pellets were measured at room temperature.
Keywords: Piezoelectric; chemical synthesis; nanostructure; perovskite; transmission electron microscopy
Document Type: Research Article
Affiliations: 1: Defence Metallurgical Research Laboratory, Hyderabad, India 2: Department of Physics, National Institute of Technology, Rourkela, India
Publication date: 01 January 2010
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