COMPARATIVE STUDY ON SINTERING BEHAVIOUR OF LaCoO 3 CERAMICS OBTAINED BY MECHANICAL ACTIVATION WITH SINGLE-AND TWO-STEP FIRING

Georgeta Velciu, Alina Melinescu, Virgil Marinescu, Maria Preda, Adelina Ianculescu, Traian Zaharescu
2016 Bull., Series B   unpublished
In this paper the sintering behavior of LaCoO 3 prepared by mechanical activation followed by single and two-step firing was studied. All kinds of LaCoO 3 obtained were investigated in terms of the particle size distribution. In both situations, the highest degree of uniformity was obtained after 10 hours of milling. The samples were thermally treated for the synthesis and sintering at temperatures of 1225 and 1275 o C, respectively. To determine the sinterability, the apparent density and
more » ... nt density and porosity of the samples were measured by the Archimedes' method. Irrespective of the number of firing steps, samples with relative density higher than 90% were obtained. The morphology of the ceramic samples resulted after single and double firing was analysed by scanning electron microscopy (SEM).
fatcat:lfopfye25ba5ninxp3t3yaodxm