Title of article
Synthesis, characterization, structural refinement and optical absorption behavior of PbWO4 powders
Author/Authors
Cavalcante، نويسنده , , L.S. and Sczancoski، نويسنده , , J.C. and Albarici، نويسنده , , V.C. and Matos، نويسنده , , J.M.E. and Varela، نويسنده , , J.A. and Longo، نويسنده , , E.، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2008
Pages
8
From page
18
To page
25
Abstract
The present paper describes the synthesis, characterization, structural refinement and optical absorption behavior of lead tungstate (PbWO4) powders obtained by the complex polymerization method heat treated at different temperatures for 2 h in air atmosphere. PbWO4 powders were characterized by X-ray diffraction (XRD), Rietveld refinement, Fourier transform Raman (FT-Raman) spectroscopy and ultraviolet–visible (UV–vis) absorption spectroscopy measurements. XRD, Rietveld refinement and FT-Raman revealed that PbWO4 powders are free of secondary phases and crystallizes in a tetragonal structure. The UV–vis absorption spectroscopy measurements suggest the presence of intermediary energy levels into the band gap of structurally disordered powders.
Keywords
Lead , ceramics , crystallization , Crystal symmetry , Optical properties , Order–disorder transition
Journal title
MATERIALS SCIENCE & ENGINEERING: B
Serial Year
2008
Journal title
MATERIALS SCIENCE & ENGINEERING: B
Record number
2145791
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