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AuthorJaldurgam F.F.
AuthorAhmad Z.
AuthorTouati F.
AuthorAshraf A.A.
AuthorShakoor A.
AuthorBhadra J.
AuthorAl-Thani N.J.
AuthorAltahtamouni T.
Available date2022-05-22T11:03:01Z
Publication Date2022
Publication NameJournal of Alloys and Compounds
ResourceScopus
Identifierhttp://dx.doi.org/10.1016/j.jallcom.2022.164131
URIhttp://hdl.handle.net/10576/31391
AbstractOur current work aims to enhance the thermoelectric properties of p-type copper selenide (Cu2Se), a low toxic, earth-abundant intermediate material for thermoelectric applications by a low-cost, simple and fast microwave-assisted metallurgy route. Hot pressed copper selenide pellets were treated at various temperatures in the range of 250 oC to 425 oC in a microwave furnace. We analyze the variation of several characteristics of the samples, such as electrical, thermal, structural, microscopic, dielectric, and mechanical properties, when the samples are exposed to different annealing conditions. Broadband dielectric spectroscopy (BDS) analysis facilitated the comprehensive study of variation of AC electrical characteristics of the samples such as AC conductivity, dielectric permittivity storage, dielectric loss, and AC capacitance, with temperature and frequency. The results indicate exceptional electrical, thermal, and mechanical properties for samples annealed at 375 oC with high room temperature electrical conductivity of 538.3 S/cm and ultra-low thermal conductivity of 0.59 W/mK. The crystallinity improved as the annealing temperature increased, as did the formation of oxides over 400 oC. The samples have a high strength with maximum nanohardnesss and compression strength of 3.75 GPa and 326.75 MPa, respectively that has been a significant improvement over the existing studies on copper selenides.
Languageen
PublisherElsevier Ltd
SubjectAnnealing
Crystallinity
Dielectric losses
Microwave heating
Microwaves
Permittivity
Selenium compounds
Sintering
Thermal conductivity
Thermoelectric equipment
Thermoelectricity
current
Broadband dielectric spectroscopy
Intermediate materials
Microwave annealing
Microwave sintering
P-type
Thermo-Electric materials
Thermoelectric
Thermoelectric material
Thermoelectric properties
Copper compounds
TitleEnhancement of thermoelectric properties of low-toxic and earth-abundant copper selenide thermoelectric material by microwave annealing
TypeArticle
Volume Number904
dc.accessType Abstract Only


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