MECHANOCHEMICAL EFFECTS ON THE PROPERTIES OF STARTING MIXTURES FOR PBTIO3 CERAMICS BY USING A NOVEL GRINDING EQUIPMENT

摘要

The effects of milling were studied using a newly developed multi-ring media-type grinding machine on the synthesis processes of PbTiO3 ceramics from PbO-TiO2 mixed sols. The temperature of the endothermic and exothermic DTA peaks, corresponding to dehydration and crystallization, decreased with milling time. After milling the mixed sol for 5 min and heating to 823 K, the product was a single-phase PbTiO3. This suggests rapid homogenization and formation of lead titanate precursors during milling. The effects of milling were revealed to be much less when mixtures of dry and wet powders were used. [References: 9]