The kinetics of sintering of Ni(s)-NiO(s) and Fe(s)-Fe1-xO(s) powder mixts. were investigated by measurements of d.c. quantities such as resistance, emf., and current under a const. applied voltage. Sintering of compacted pellets of the 2 powder mixts. was carried out at 1293 K in Ar at 101.325 kPa with an O partial pressure of <1 × 10-10 Pa for ∼60 h. Different behavior of the recorded quantities was found between the 2 mixts. The elec. resistance of the Fe(s)-Fe1-xO(s) mixt. decreased with increasing time to reach a const. value. On the contrary, the other mixt. had a high resistance for a relevant part of the expt. and then through a transition period became low and const. An anal. of the results in terms of resistivity and Tamman's sintering temp. of the components seems satisfactory for explaining the exptl. results.
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|Titolo:||ELECTRICAL PARAMETERS IN ME-MEO SINTERING|
|Data di pubblicazione:||1989|
|Appartiene alla tipologia:||01a Articolo in rivista|