Some Aspects of Spinodal Decomposition in Spinel Solid Solutions

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Burkert, N.; Grüne, R.; Schmalzried, H.; Rahman, S.: Some Aspects of Spinodal Decomposition in Spinel Solid Solutions. In: Zeitschrift für Naturforschung - Section A Journal of Physical Sciences 50 (1995), Nr. 6, S. 525-532. DOI: https://doi.org/10.1515/zna-1995-0603

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Abstract: 
Decomposition morphologies of supersaturated spinel solid solutions in the quasi-binary system Co2TiO4-CoAl2O4 at 973 K show all pertinent features of spinodal decomposition. Since the decomposition morphology may not be considered as sufficient evidence for a spinodal process, the thermodynamics of the spinel solid solutions and the linear transport theory of spinodal decomposition were combined to corroborate the experimental results of the early decomposition reaction. Simultaneous ordering, a common property of ternary and higher nonequilibrium solid solutions, was also observed. These ordering processes occur locally in distinct regions of the spinel crystal. Moreover, the spinodal wavelength λ increases in time according to λ ∝ t, which is unusual and will be discussed in the light of cation diffusion in semiconducting oxides with two cation sublattices.
License of this version: CC BY-NC-ND 3.0
Document Type: article
Publishing status: publishedVersion
Issue Date: 1995
Appears in Collections:Naturwissenschaftliche Fakultät

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1 image of flag of Germany Germany 17 70.83%
2 image of flag of China China 3 12.50%
3 image of flag of Netherlands Netherlands 1 4.17%
4 image of flag of Korea, Republic of Korea, Republic of 1 4.17%
5 image of flag of India India 1 4.17%
6 image of flag of Europe Europe 1 4.17%

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