Preparation of pyrochlore free PMN-PT powder by wet-chemical route

Sahoo, B and Jaleel, VA and Panda, PK (2003) Preparation of pyrochlore free PMN-PT powder by wet-chemical route. In: Proceedings of the National Conference on Materials and Related Technologies (NCMRT-2003), 19-20 Sep 2003, Patiala (Punjab) India.

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Pyrochlore free Lead Magnesium Niobate-Lead Titanate (PMN-PT) powders with Morphotropic Phase Boundary (MPB) composition were prepared via an intermediate coulombite phase. Coulombite phase was prepared by calcining powder mixtures of magnesium oxalate and niobium oxide processed by wet- chemical method. The powders were calcined in the temperature range of 900-1 050°C for 2-5 hours. The complete phase formation is confirmed by XRD analysis. This powder was then properly mixed with lead oxalate and titanium dioxide powder and again calcined in the temperature range of 700-850°C for 2-4 hours to obtain PMN-PT powders. This powder was used to prepare compacts by uni-axial pressing and the compacts were sintered in the temperature range of 1 100-1250°C for2 hours. The compacts were characterized for phase analysis, piezo-properties, morphology etc. The composition was varied to obtain high piezo properties.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Wet chemical route;Ceramics;Perovskite structure;Mixed oxide
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Ms. Alphones Mary
Date Deposited: 27 Nov 2012 08:41
Last Modified: 27 Nov 2012 08:41

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