Effect of molybdenum on structural, optical and microwave dielectric properties of copper tungstate

  • Anterdipan Singh
  • Sameer Kumar Tiwari
  • Pritam Yadav
  • Bibek Kumar Sonu
  • Rolly Verma
  • Ela SinhaEmail author
  • S. K. RoutEmail author


This article covers the structural and the optical properties of CuMoxW1−xO4 ceramics for x = 0, 0.02, 0.04, 0.06 and 0.08 prepared by solid-state reaction route. Chemical composition and microstructure of the prepared CuMoxW1−xO4 ceramic samples were characterized by means of X-ray diffraction, scanning electron microscopy, UV–Vis spectrophotometry and FT-IR spectroscopy. X-ray diffraction analysis confirmed the formation of monophasic wolframite structure whose cell volume is increased with increased Mo content. The Reitveld refinement of X-ray powder revealed the triclinic structure with \(P\overline{1}\) symmetry. A reduction in optical band gap from 2.4 to 2.0 eV is obtained with increased Mo concentration. This reduction in band gap suggested its possible utilization in the visible region of electromagnetic spectrum. The photoluminescence (PL) peaks are shifted towards lower energy. The microwave dielectric parameters were measured by the Hakki–Coleman method. The dielectric constant (ε′) and dielectric loss (tan δ) decreased from 17.049 to 12.375 and 0.0156 to 0.0129, respectively, with the increase in Mo content.



All authors gratefully acknowledge the financial supports from the Science and Engineering Research Board, Department of Science and Technology (DST), Government of India, through Project Nos. SB/FT/CS-044/2013 and EMR/2016/001582. The authors also thank the central instrumentation facility, Birla Institute of Technology, Mesra, for providing necessary infrastructure to carry out different experiments.

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of PhysicsBirla Institute of Technology, MesraRanchiIndia

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