Lead-based piezoelectric ceramics with their excellent piezoelectric properties are most widely used for harvesting piezo-electric energy.However,lead oxide in lead-based piezoelectric ceramics is harmful to humans and cause serious environmental problems. Furthermore,European Union(EU)legislations ,such as waste from electrical and electronic equipment (WEEE), restriction of hazardous substances (RoHS) ,andend- oflife vehicles(ELV),have suggested the prevention of use of lead based materials [2].