Abstract
Surfaces and fractures in variously-sintered ferric oxide and chromic oxide compacts have been scanned for metal content by electron microprobe analysis. Also, fractures in these oxides have been examined at temperatures up to 1000° C by the electrical conductivity probe, using an atmosphere of gettered argon. The microprobe analysis gave indications of high metal contents in sintered surfaces, and the conductivity probe showed no significant variation of resistivity with temperatures up to 800° C. It is inferred that a thin metal film exists on the surface of particles of “black” ferric and chromic oxides. A model is proposed to account for sintering phenomena in these oxides.
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References
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Stone, H.E.N. Sintering in ferric and chromic oxides: Further work. J Mater Sci 4, 166–169 (1969). https://doi.org/10.1007/BF00550657
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DOI: https://doi.org/10.1007/BF00550657