Activities in liquid Ga-Te alloys at 1120 k

Srikanth, S. ; Jacob, K. T. (1989) Activities in liquid Ga-Te alloys at 1120 k Thermochimica Acta, 153 . pp. 27-35. ISSN 0040-6031

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/004060...

Related URL: http://dx.doi.org/10.1016/0040-6031(89)85419-X

Abstract

The activity of gallium in liquid Ga-Te alloys has been measured at 1120 K using a solid state galvanic cell incorporating yttria-stabilized thoria as the solid electrolyte. The cell can be schematically represented as (-) W,Re,Ga(1)+Ga2O3(s)|(Y2O3) ThO2|Ga-Te(1) + Ga2O3(s), Re, W (+) The activity of tellurium was derived by Gibbs-Duhem integration. The activity of gallium shows negative deviation from Raoult's law for XGa < 0.6 and positive deviation from ideality for XGa > 0.6. The activity of gallium was constant in the composition range 0.73 < XGa < 0.89, indicating liquid state immiscibility in this region. The Gibbs energy of mixing and the concentration-concentration structure factor at long wavelength limit show a minimum at XGa ≈ 0.4, suggesting strong interactions in the liquid phase with formation of 'Ga2Te3'-type complexes.The Gibbs energy of mixing and the concentration-concentration structure factor at long wavelength limit show a minimum at X≈ 0.4, suggesting strong interactions in the liquid phase with formation of 'GaTe'-type complexes.

Item Type:Article
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ID Code:13055
Deposited On:11 Nov 2010 07:00
Last Modified:03 Jun 2011 09:48

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