Dielectric behavior in erbium-doped tellurite glass for potential high-energy capacitor

  • M. N. AzlanEmail author
  • S. Z. Shafinas
  • M. K. Halimah
  • A. B. Suriani


The use of erbium ions, Er3+ to enhance the dielectric properties is investigated in tellurite glass system for the first time, to the best of our knowledge. A glass series of tellurite glass with chemical composition, {[(TeO2)70(B2O3)30]70(ZnO)30}100−y(Er2O3)y (y = 0, 0.005, 0.01, 0.02, 0.03, 0.04 and 0.05) was fabricated via melt-quenched technique. The X-ray diffraction and Fourier transform infrared spectroscopy analysis proved the amorphous structure and the formation of nonbridging oxygen in the glass system. The Er3+ ions affect greatly to the dielectric constant, ε′ in which the dielectric constant, ε′ show high value at a lower frequency and higher temperature (above 110 °C). The reduction of dielectric constant, ε′ is found with the increment value of frequency, which corresponds to the formation of the hindrance effect on heavy dipoles caused by the mixed transition-ion effect. Meanwhile, the dielectric constant, ε′ is enhanced with the increase of temperature. The activation energy of the glass system is found to decrease, which is due to the high polarizability of Er3+ ions in the glass system. Based on these results, the erbium-doped tellurite glass is a potential kind of high-energy capacitor.



The writers appreciate the financial support for the work from the Ministry of Higher Education of Malaysia and Universiti Pendidikan Sultan Idris through Skim Geran Penyelidikan Fundamental, FRGS [Code 2019-0006-102-02 (FRGS/1/2018/STG07/UPSI/02/1)] and Geran Penyelidikan Universiti, GPU (Code 2018-0139-103-1). The authors would like to thank the following institutions for equipment support: Faculty of Science and Mathematics, Universiti Pendidikan Sultan Idris and Faculty of Science, Universiti Putra Malaysia.


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Authors and Affiliations

  1. 1.Physics Department, Faculty of Science and MathematicsUniversiti Pendidikan Sultan IdrisTanjung MalimMalaysia
  2. 2.Physics Department, Faculty of ScienceUniversity Putra MalaysiaUPM SerdangMalaysia

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