The impact of different mixing methods and sintering temperatures on the microstructure and piezoelectric properties of PZNN-PZT ceramics is investigated. To improve the sinterability and piezoelectric properties of these ceramics, the composition of 0.13Pb((Zn0.8Ni0.2)1/3Nb2/3)O3-0.87Pb(Zr0.5Ti0.5)O3 (PZNN-PZT) containing a Pb-based relaxor component is selected. Two methods are used to create the powder for the PZNN-PZT ceramics. The first involves blending all source powders at once, followed by calcination. The second involves the preferential creation of columbite as a precursor, by reacting NiO with Nb2O5 powder. Subsequently, PZNN-PZT powder can be prepared by mixing the columbite powder, PbO, and other components, followed by an additional calcination step. All the PZNNPZT powder samples in this study show a nearly-pure perovskite phase. High-density PZNN-PZT ceramics can be fabricated using powders prepared by a two-step calcination process, with the addition of 0.3 wt% MnO2 at even relatively low sintering temperatures from 800℃ to 1000℃. The grain size of the ceramics at sintering temperatures above 900℃ is increased to approximately 3 μm. The optimized PZNN-PZT piezoelectric ceramics show a piezoelectric constant (d33) of 360 pC/N, an electromechanical coupling factor (kp) of 0.61, and a quality factor (Qm) of 275.

Abstract
 1. 서 론
 2. 실험방법
 3. 실험결과 및 토의
 4. 결 론
 References

• 김소원(한국산업기술대학교 신소재공학과) | So Won Kim (Department of Advanced Materials Engineering, Korea Polytechnic University)
• 정용정(한국산업기술대학교 신소재공학과) | Yong Jeong Jeong (Department of Advanced Materials Engineering, Korea Polytechnic University)
• 이희철(한국산업기술대학교 신소재공학과) | Hee Chul Lee (Department of Advanced Materials Engineering, Korea Polytechnic University) Corresponding Author