Impact of Cerium Doping on Dielectric Properties of Palmierite [K2Pb(SO4)2] View Full Text


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Article Info

DATE

2019-02-08

AUTHORS

Sarala Natarajan, Dhatchayani Surendran, Govindan Vadivel, Sankaranarayanan Krishnasamy

ABSTRACT

Cerium-doped K2Pb(SO4)2 was synthesized by a coprecipitation method. K2Pb(SO4)2 is a semitransparent colourless or white material that occurs as a rare fumarolic sublimate. Only the crystal structure of palmierite has been reported to date. The present work concentrates on its vibrational and physical properties, including optical, thermal, and dielectric studies. The crystalline nature and lattice distortion were confirmed by x-ray diffraction analysis. Fourier-transform infrared (FTIR) spectroscopy revealed the functional groups present in the material. Morphological and elemental composition analyses were carried out by scanning electron microscope/energy-dispersive spectroscopy (SEM/EDAX). Thermogravimetric–differential scanning calorimetry (TG-DSC) analysis was carried out for improved understanding of the thermal characteristics of undoped and Ce-doped K2Pb(SO4)2. The optical characteristics were analyzed by photoluminescence (PL) spectrophotometry. The presence of cerium ions was confirmed by the emission peak at 314 nm, which may be due to 5d–4f transitions of Ce3+ ions. The dielectric constant and loss were measured as functions of frequency. The results indicate that cerium doping has a significant influence on the dielectric properties of K2Pb(SO4)2. More... »

PAGES

2577-2586

References to SciGraph publications

  • 2001-01. Dielectric energy storage in PbxSr1-xTiO3 ceramics in JOURNAL OF MATERIALS SCIENCE: MATERIALS IN ELECTRONICS
  • 2015-12-24. Energy storage properties and electrical behavior of lead-free (1 − x) Ba0.04Bi0.48Na0.48TiO3–xSrZrO3 ceramics in JOURNAL OF MATERIALS SCIENCE: MATERIALS IN ELECTRONICS
  • 2008-09. Comparative DSC study on thermal decomposition of iron sulphates in JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY
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