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Free energy of formation of barium ferrites

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Abstract

The free energy of formation (AG°) of various ferrites in the system BaO-Fe2O3 was determined with galvanic cells using barium fluoride as solid electrolyte. The values of ΔG° per mole of 2 BaO · Fe2O3, BaO · Fe2O3 and BaO · 6 Fe2O3 from BaO and Fe2O3 were found to be-10,953 (±2275) J, -68,496 (±435) J, -75,576 (±250) J at 1200 K and-104,600 (±2275) J, -66,875 (±435) J, -74,437 (±250) J at 1300 K respectively.

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Authors and Affiliations

  1. Research and Development, Hindustan Steel Limited, Ranchi-834002, Bihar, India

    Brahma Deo

  2. Department of Metal-lurgical Engineering, Institute of Technology, Banaras Hindu University, Varanasi-221005, U.P, India

    J. S. Kachhawaha (Lecturer) & V. B. Tare (Reader)

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  1. Brahma Deo
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  2. J. S. Kachhawaha
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  3. V. B. Tare
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Deo, B., Kachhawaha, J.S. & Tare, V.B. Free energy of formation of barium ferrites. Metall Trans B 7, 405–409 (1976). https://doi.org/10.1007/BF02652711

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