Crystal Structure ,Visualization ,ESR,Thermal,Spectral -Investigations and Micro-structural Features of Thorium-Doped Pb1-xThxZrO3 Perovskite

Khaled M. Elsabawy


The pure lead zirconate ( PbZrO3 ) and low concentrations thorium-doped samples with general formula           (Pb1-xThxZrO3) where x = 0.05,0.1,0.2,0.25 mole were synthesized by the conventional solid state method and sintering procedures . Experimental XRD-measurements indicated that Thorium dopant can substitute successfully on the A-sites of lead zirconate without damaging the main crystal structure which found to be orthorhombic phase with Cmmm space group .SE-microscopy indicated that the average grain size of thorium-doped-lead zirconate ranged in between 0.35 and 1.43 µm  . A Visualized studies were made to confirm success of thorium doping in the A-sites of pervoskite structure .Theoretical investigations done were concerned by matching and comparison of  bond distances ,torsions on angles of investigated compound to clarify success  of thorium doping  on the perovskite structure .Thermal analyses TGA&DTA were also incorporated to clarify effect  of thorium doping on thermal behavior of doped perovskite  .Furthermore the effect of low concentration thorium dopings on the magnetic order ,grain size and vibrational modes frequencies of infrared-spectra were studied .

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