Vapor-Pressure of Calcium Corresponding to the Reduction of Calcia by Aluminium

Srikanth, S and Jacob, K T (1991) Vapor-Pressure of Calcium Corresponding to the Reduction of Calcia by Aluminium. Transactions of the Indian Institute of Metals, 44 (5). pp. 369-373.

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Abstract

The equilibrium pressure of calcium corresponding to the reduction reaction 6CaO (s) + 2Al (l) half-arrow-right-over-half-arrow-left 3CaO.Al2O3 (s) + 3Ca (g) has been measured by Knudsen effusion - mass loss analysis in the temperature range 1190 - 1500 K. The measured vapour pressure can be expressed as a function of temperature by the relation: log p (Ca) (Pa) = -10,670/T + 9.267 The calcium generated is partially absorbed by aluminium to form an alloy. The equilibrium composition of the alloy at 1373 K was found to be 22 mol% Ca - 78 mol% Al. The measured vapour pressure is in good agreement with that computed from thermodynamic data.

Item Type:Article
Official URL/DOI:http://journal.library.iisc.ernet.in/archives.html
Uncontrolled Keywords:Calcium; thermodynamic; vapor pressure
Divisions:Director Office
ID Code:3990
Deposited By:Sahu A K
Deposited On:23 Sep 2011 10:28
Last Modified:25 Jun 2015 10:56
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