Phase Stability of Thermoelectric Alkaline Earth Metal Borides and Silicides

Autor:	Mallikharjuna R. Bogala, Ramana G. Reddy
Rok vydání:	2015
Předmět:	Materials science Metallurgy Thermodynamics Thermoelectric materials Gibbs free energy Condensed Matter::Materials Science symbols.namesake Thermal conductivity Condensed Matter::Superconductivity Phase (matter) Seebeck coefficient Thermoelectric effect symbols Figure of merit Phase diagram
Zdroj:	TMS2015 Supplemental Proceedings ISBN: 9781119093466 TMS 2015 144th Annual Meeting & Exhibition ISBN: 9783319486086 TMS2015 Supplemental Proceedings
DOI:	10.1002/9781119093466.ch77
Popis:	Group (II) metal borides and silicides have been studied as high temperature thermoelectric materials because of their good thermal stabilities and high melting points. In the present study, an investigation was carried out on thermoelectric and thermodynamic properties of group (II) metal borides (CaB6 and SrB6) and silicides (Mg2Si and CaSi) at high temperatures (up to 1050 K). Experimental data on thermoelectric properties (Seebeck coefficient, electrical conductivity, thermal conductivity and figure of merit) of the borides and silicides was collected and evaluated as a function of temperature. Thermodynamic properties such as Gibbs energy and activities of B and Si in the binary alloys and corresponding binary phase diagrams were evaluated. Phase equilibria and crystal structure of the alloys were determined from the available binary alloy data. Mg2Si exhibited better thermoelectric figure of merit and has greater potential for power generation at high temperatures.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80231d618bfdbd0f5d681ea888d0a4c5 https://doi.org/10.1002/9781119093466.ch77 Zobrazit plný text záznamu