PIEZOELECTRIC MATERIAL AND METHOD OF MANUFACTURING THE SAME

摘要

An NKN-based piezoelectric material is provided to show low-temperature sintering properties in order to mass-produce the NKN-based piezoelectric material and prevent volatilization of Na2O so as to improve piezoelectric characteristics. A method for manufacturing a NKN-based piezoelectric material comprises the following steps of: mixing raw materials powder to prepare a mixture(S100, S200); calcining the mixture to prepare first powder(S300); adding additives to the prepared first powder to prepare second powder(S400); and pressure-molding the second powder and sintering the powder at a temperature range of 700-1000°C(S500, S600). The raw materials powder contains K2CO3, Na2CO3, Nb2O5, BaCO3 and TiO2. The additives are oxide containing CuO or ZnO. The second powder is prepared by wet-mixing the first powder and the additives for 50-100 hours and drying the powder.