Journal
MATERIALS LETTERS
Volume 65, Issue 6, Pages 970-973Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2010.12.039
Keywords
Perovskite; Ceramics; Sintering; Piezoelectric materials
Funding
- UGC of India [F. 33-25/2007(SR)]
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Barium titanate (BaTiO3) nanocrystalline powders were prepared by solid state reaction route starting from BaCO3 and TiO2 powders accompanied by high-energy ball milling. Different samples were prepared by varying the milling time from 1 h to 30 h, keeping the milling speed fixed at 250 rpm. All the milled powders were examined with TEM. The particle size first decreases from 105 nm to a minimum of 28 nm as the milling time increases from 1 h to 20 h and then increases to 38 nm with further increase of milling time to 30 h. Dense ceramics were formed by sintering the nanopowders at 1350 degrees C for 4 h. With decreasing particle size of the starting nanopowders, the ceramics exhibit gradual increase in density from 5.65 g/cc to 5.84 g/cc. coercive field (E-c) from 2.25 kv/cm to 4.77 kV/cm and piezoelectric charge constant (d(33)) from 99pC/N to 121pC/N. (C) 2010 Elsevier B.V. All rights reserved.
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