Study on Nickel Ferrite Formation by Using a Simple Method to Simulate Heat Transfer Surface

Abstract:

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The condition of a heat transfer surface with boiling is composed of three environmental components; high temperature, high pressure and water vapor. In general an autoclave or a high temperature loop system is used for maintaining the required condition. The thermodynamic relationship of chemical reactions states that the free energy difference (ΔG) is clearly dependent on the reaction temperature and independent of the reaction pressure if the reaction has no volume change: (∂ΔG/∂P)T = ΔV ~ 0. Based on the above relationship, the high-pressure term was removed from the environmental components of the heat transfer surface. A vacuum quartz capsule with a moisturized metal oxide powder was used to study the formation of nickel ferrite. The feasibility of this simplified method to simulate a heat transfer surface was confirmed by an analysis of the FT-IR spectra and XRD pattern during the transformation of a nickel and iron mixed oxide into nickel ferrite.

Info:

Periodical:

Solid State Phenomena (Volumes 124-126)

Edited by:

Byung Tae Ahn, Hyeongtag Jeon, Bo Young Hur, Kibae Kim and Jong Wan Park

Pages:

1565-1568

DOI:

10.4028/www.scientific.net/SSP.124-126.1565

Citation:

J. W. Yeon et al., "Study on Nickel Ferrite Formation by Using a Simple Method to Simulate Heat Transfer Surface", Solid State Phenomena, Vols. 124-126, pp. 1565-1568, 2007

Online since:

June 2007

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Price:

$35.00

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