SINTERING ABILITY OF BATIO3 POWDERS ELABORATED BY CITRIC PROCESS

BaTiO3 powders have been elaborated by several methods using mixed cit rate as precursor. This compound has been used alone or dissolved in a queous or organic solutions, giving rise to different powder morpholog ies (blocks of aggregates, hollow spheres, plate-like agglomerates, po rous plates, blocks). The pore size distributions of the green compact ed samples were measured by mercury in trusion and the sintering was f ollowed by dilatometry. The sintering ability of these powders depends essentially on their agglomeration state determined by their elaborat ion mode. A powder densification mechanism proposed.