NIO-DOPED PNN-PZT PIEZOELECTRIC CERAMICS AND METHOD FOR PRODUCING THE SAME

摘要

PNN-PZT piezoelectric ceramics with constant content of NiO are provided to have dielectric and piezoelectric properties such as piezoelectric charge constant and are preferably used for accelerometer sensors by comprising PbO, TiO2, NiNb2O6 and ZrO2 and adding NiO in desired content to the ceramics. The piezoelectric ceramics are formed by steps of: preparing each of PbO, ZrO2, TiO2 and NiNb2O6 powders as starting materials; calcining the starting materials, NiO and Nb2O5; milling all of the starting materials then drying the milled powders; sizing and calcining the dried powders; adding additives to the powders after crushing the calcined powders; and milling the mixture. The obtained ceramics contain NiO in solid solution form and has perovskite crystalline structure and composition of 0.5Pb(Zr0.52Ti0.48)O30.5Pb(Ni1/3Nb2/3)O3-y[mol%]NiO-1[wt%]PbO wherein y is 1.0.