Authors: B P Das R N P Choudhary P K Mahapatra
Publish Date: 2007/02/21
Volume: 18, Issue: 9, Pages: 977-984
Abstract
Ymodified PbSnTiO3 polycrystalline materials with a general formula Pb 1xhboxY x Sn 045hboxTi 055 1x/4hboxO 3 PYST x = 0 005 007 01 have been synthesized using the standard mixed oxide method Crystallographic and surface morphology studies are carried out by the powder Xray diffraction and scanning electron microscopy techniques Xray diffraction studies of the samples showed the tetragonal structure of the unit cell Uniform grain distributions with porosity throughout the surface of the sample pellets are observed The T C transition temperature increases with increase in the mole fraction of the substituent x ɛ/ max is found to decrease with increase in x The slope of lnσac∼ 1/T shows distinct variations for temperature below 410 K 410 K to T c and for T T c The room temperature ac conductivity at 10 kHz lies in the range of 10−5–10−6 ohm−1 m−1
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