Aqueous tape casting of PMN-PT powder prepared by the partial oxalate route

Aqueous tape casting of PMN-PT powder, prepared by the partial oxalate route, using PVA and glycerol as a binder and a plasticizer has been studied. The amount of PVA and glycerol required for forming green tape with good strength and flexibility has been optimized. The tape cast PMN-PT sintered to near theoretical density (>99% TD) at lower temperature (1200 °C) are compared to the samples prepared by uni-axial pressing (1270 °C). Flat PMN-PT tapes with good surface finish could be prepared by binder removal and sintering of the green tapes. The piezoelectric properties of the sintered tapes are comparable to that of PMN-PT ceramics reported in literature.