Current Applied Physics, Vol.11, No.4, S6-S10, 2011
Application of CIP processing and sol-gel surface coating to PZN-PZT piezoelectric ceramics for use as energy harvesters
Piezoelectric 0.2Pb(Zn(1/3)Nb(2/3))O(3)-0.8Pb(Zr(1/2)Ti(1/2))O(3) (PZN-PZT) ceramics in disc form were fabricated and characterized for use as energy harvester devices. A powder mixture with an average particle size of about 1 mm with the addition of 0.5 wt% ZnO was used to obtain a high piezoelectric coefficient and low sintering temperature. A molding method, including cold isostatic pressing (CIP), was used to resolve the cracking and bending problems of thin ceramics during the high-temperature post-processing sintering step. A sol-gel surface coating was found to be very effective for ceramic discs with a very high piezoelectric constant d(33) of 536 pC/N. The results of this study could be applicable to small piezoelectric energy harvester devices. (C) 2011 Elsevier B.V. All rights reserved.