The Resource The thermodynamics of the ZnO-Fe2O3-Fe3O4 system, by Dennis George Dreyer

The thermodynamics of the ZnO-Fe2O3-Fe3O4 system, by Dennis George Dreyer

Label
The thermodynamics of the ZnO-Fe2O3-Fe3O4 system
Title
The thermodynamics of the ZnO-Fe2O3-Fe3O4 system
Statement of responsibility
by Dennis George Dreyer
Creator
Author
Subject
Language
eng
Summary
"A study was made of the ZnO-Fe2O3-Fe3O4 system at 1200°C using oxygen pressures between 0.1 and 1x10−4 atmospheres. The results of this study were used to calculate the activities of ZnO, Fe2O3, and Fe3O4 in the spinel solid solution region of this ternary system. The activities of ZnFe2O4 and Fe3O4 across the pseudo-binary system were then calculated. The activities of the components in both the ternar and pseudo-binary systems exhibited large positive deviations from Raoult's Law, being more pronounced at the higher Fe3O4 content. The free energy, enthalpy, and entropy of mixing of the pseudo-binary system ZnFe2O4-Fe3O4 at 1200°C were calculated from the activities of ZnFe2O4 and Fe3O4 . The entropy of mixing was compared with the entropy of mixing calculated from two statistical models, one representing an ideal solution, and the other representing the mixing of a normal with an inverse spinel. The pseudo-binary entropy of mixing appeared to compare the best with the model of the mixing of a normal with an inverse spinel. This indicates that the cations of a normal and an inverse spinel tend to occupy the same positions in the spinel solid solution lattice that they would occupy in their respective pure components. This comparison also indicates that the cation distribution in the spinel solid solution is an important factor in determining the thermodynamic properties of the spinel solid solution"--Abstract, leaf ii
Member of
Cataloging source
UMR
http://library.link/vocab/creatorDate
1941-
http://library.link/vocab/creatorName
Dreyer, Dennis George
Degree
M.S.
Dissertation year
1966.
Granting institution
University of Missouri--Rolla
Illustrations
illustrations
Index
no index present
Literary form
non fiction
Nature of contents
  • bibliography
  • theses
http://library.link/vocab/subjectName
  • Spinel
  • Zinc oxide
  • Ferric oxide
  • Magnetite
Label
The thermodynamics of the ZnO-Fe2O3-Fe3O4 system, by Dennis George Dreyer
Instantiates
Production
Note
  • Vita
  • Typescript
Bibliography note
Includes bibliographical references (leaf 51)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier.
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Control code
5976850
Dimensions
29 cm
Extent
vii, 63 leaves
Media category
unmediated
Media MARC source
rdamedia.
Media type code
  • n
Other physical details
illustrations
System control number
(OCoLC)5976850
Label
The thermodynamics of the ZnO-Fe2O3-Fe3O4 system, by Dennis George Dreyer
Production
Note
  • Vita
  • Typescript
Bibliography note
Includes bibliographical references (leaf 51)
Carrier category
volume
Carrier category code
  • nc
Carrier MARC source
rdacarrier.
Content category
text
Content type code
  • txt
Content type MARC source
rdacontent.
Control code
5976850
Dimensions
29 cm
Extent
vii, 63 leaves
Media category
unmediated
Media MARC source
rdamedia.
Media type code
  • n
Other physical details
illustrations
System control number
(OCoLC)5976850

Library Locations

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      400 West 14th Street, Rolla, MO, 65409, US
      37.955220 -91.772210
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