Piezoelectric ceramic specimens with the Pb(Mg1/3Nb2/3)0.65Ti0.35O3 (PMN-PT) composition are prepared by the solid state reaction method known as the “columbite precursor” method. Moreover, the effects of the Li2O-Bi2O3 additive on the microstructure, crystal structure, and piezoelectric properties of sintered PMN-PT ceramic samples are investigated. The addition of Li2O-Bi2O3 lowers the sintering temperature from 1,200oC to 950oC. Moreover, with the addition of >5 wt.% additive, the crystal structure changes from tetragonal to rhombohedral. Notably, the sample with 3 wt.% additive exhibits excellent piezoelectric properties (d33 = 596 pC/N and Kp = 57%) and a sintered density of 7.92 g/cm3 after sintering at 950oC. In addition, the sample exhibits a curie temperature of 138.6oC at 1 kHz. Finally, the compatibility of the sample with a Cu electrode is examined, because the energy-dispersive X-ray spectroscopy data indicate the absence of interdiffusion between Cu and the ceramic material.

Abstract
1. 서 론
2. 실험방법
3. 결과 및 고찰
4. 결 론
References

• 김재혁(고려대학교 신소재공학부/한국세라믹기술원 엔지니어링세라믹센터) | Jae Hyuk Kim (Department of Materials Science and Engineering, Korea University/Korea Institute of Ceramic Engineering & Technology)
• 김시연(한국세라믹기술원 엔지니어링세라믹센터) | Shi Yeon Kim (Korea Institute of Ceramic Engineering & Technology)
• 최정식(한국세라믹기술원 엔지니어링세라믹센터) | Jeoung Sik Choi (Korea Institute of Ceramic Engineering & Technology)
• 신효순(한국세라믹기술원 엔지니어링세라믹센터) | Hyo-Soon Shin (Korea Institute of Ceramic Engineering & Technology)
• 여동훈(한국세라믹기술원 엔지니어링세라믹센터) | Dong-Hun Yeo (Korea Institute of Ceramic Engineering & Technology) Corresponding Author
• 남 산(고려대학교 신소재공학부) | Sahn Nahm (Department of Materials Science and Engineering, Korea University)