Ceramics-Silikáty 22, (4) 317 - 328 (1978) |
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INTERDIFFUSION STUDY IN THE SYSTEM Ni-Fe₃O₄
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Grman Dušan, Jesenák Viktor
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Faculty Center for X-ray Microanalysis, Faculty of Chemical Technology, Slovak, Technical University, 880 37 Bratislava, Jánská 1
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Diffusion processes in the system Ni-Fe3O4 were studied between 900 and 1300 °C in controlled atmosphere using electron probe X-ray microanalysis. The values of diffusion coefficients of nickel in magnetite were determined in the temperature range from 900 to 1100 °C. The activation energy of the diffusion was found 2.6 x 10² kJmol-1. Formation of a three-phase reaction product consisting of spinel [NixFe3-xO4], wüstite [(Ni,Fe)O] and metal [(Ni,Fe)] was observed in the temperature range from 1150 to 1300 °C. |
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