Thermal Transport Properties of Bi2O2Se-Ag2Se Hybrid Structures

Authors

  • Muhammad Umer Farooq Department of Physics, University of Education(Lahore) Faisalabad Campus
  • Sumayya Department of Materials Science and Engineering, Institute of Space Technology, Islamabad 44000, Pakistan
  • M. Umer Iqbal Department of Materials Science and Engineering, Institute of Space Technology, Islamabad 44000, Pakistan
  • Ishrat Asghar Department of Physics, University of Education (Lahore), Faisalabad Campus.
  • Mujtaba Ikram Institute of chemical engineering and technology (ICET), University of Punjab, Lahore Pakistan
  • Sajid Butt Department of Space Science, Institute of Space Technology, Islamabad 44000, Pakistan

Abstract

The series of Bi2O2Se-Ag2Se composites were synthesized by two step solid state reaction followed by Spark plasma sintering. To optimize their thermal transport properties, different weight percent (wt. %) of silver i-e, 10%, 15% and 20%, was added. The room temperature X-ray diffraction (XRD) and high temperature XRD was used to investigate the crystalline phases,  whereas the morphological study was conducted through FESEM. The thermal transport properties were evaluated from 323 K to 773 K, to study the effect of silver addition on thermal conductivity of all the composite samples. The reduced thermal conductivity of the composite with decreasing Ag contents is might be attributed to increase of the Ag2Se and Bi2O3 nano-inclusions in Bi2O2Se multi-phase-system that increased the phonon scattering regions and reduced the overall thermal conductivity significantly, up to 54 % for BA15SO as compared to that of BA20CO at 473 K.

Published

2021-09-19

Issue

Section

Metallurgical & Materials Engineering / Surface Engineering