INFLUENCE OF MILLING METHOD ON THE ELECTRICAL PROPERTIES OF 0.65PMN-0.35PT CERAMICS
Keywords:
High energy ball milling, conventional ball milling, hydraulic pressing, cold isostatic, pressing, PMN-PT ceramicAbstract
Stoichiometric 0.65PMN-0.35PT ceramics have been fabricated from calcined powders, which were ground by 2 different milling methods, conventional ball milling and high energy ball milling. The milling conditions of both milling methods were identical. The results of the particle size distribution showed a submicron range after milling at 200 rpm for 16 h. The powders were pressed by hydraulic pressing and cold isostatic pressing. The fully dense samples with a relative density of 96% were obtained after sintering at 1100oC. Their electrical properties with respect to the milling methods were observed. It was found that the ceramics started with the calcined powder which was prepared by high energy ball milling had higher electrical properties than those of the ceramics which were started with the calcined powder which was prepared by conventional ball milling.
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