A review on Silicide based materials for thermoelectric applications

Abstract

Thermoelectric materials are considered prime in converting energy, thanks to its nature to translate heat into electricity openly. Low efficiency and the intricacy in fabrication restrict their applications commercially. Moreover, there are certain thermoelectric materials such as alloys of telluride owing to their toxicity present peril to the environment. There is scarcity in present examination to get an ecological gracious thermoelectric material which is available in abundance to be utilized in large volumes owing to the low efficiency. The paper presents a review of such thermoelectric material which is ecological gracious. In the beginning, a number of techniques employed in advancing the figure of merit (ZT) is offered, then an indepth review of several thermoelectric materials which are siliconbased is showed. N-type doping of Mg2Si0.75Sn0.25 among aluminum along with lead at operational temperature of 850 K scaled up the value of ZT by a factor of 2. Considerable addition in carrier concentration resulted in the attainment of figure of merit with peak value of 1.4. Techniques such as nanostructuring and doping have boosted silicides such as HMS to show a remarkable achievement in the attainment of dimensionless figure of merit. Iron disilicide (FeSi2), Chromium silicide (CrSi2) and Cobalt Silicide (CoSi) have shown their worth to be employed as thermoelectric materials in industries in near future. It is also recommended to analyze supplementary types of metal oxides and organic materials which exhibit thermoelectric traits. I.In current scenario, lower utilization of thermoelectric devices is owing to their comparatively high expenditure Sarabjeet Singh et al.

Phases and Interfaces in the Cr–Fe–Si Ternary System: X-ray Diffraction and Electron Microscopy Study

“…of different phases of iron and chromium silicides. See, for instance, the studies and syntheses [15][16][17][18][19][20][21][22][23]. It should be noted that the structure of binary iron or chromium silicides has been studied separately either at the micro-or nano-metric scale in the case of thin films or nanocrystals [24][25][26][27][28][29].…”