Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Effect of Li2O-Bi2O3 Addition on the Piezoelectric Properties of Pb(Mg1/3Nb2/3)0.65Ti0.35O3 Ceramics

Li2O-Bi2O3 첨가가 Pb(Mg1/3Nb2/3)0.65Ti0.35O3 세라믹의 압전 특성에 미치는 영향

  • Kim, Jae Hyuk (Department of Materials Science and Engineering, Korea University) ;
  • Kim, Shi Yeon (Korea Institute of Ceramic Engineering & Technology) ;
  • Choi, Jeoung Sik (Korea Institute of Ceramic Engineering & Technology) ;
  • Yeo, Dong-Hun (Korea Institute of Ceramic Engineering & Technology) ;
  • Shin, Hyo-Soon (Korea Institute of Ceramic Engineering & Technology) ;
  • Nahm, Sahn (Department of Materials Science and Engineering, Korea University)
  • 김재혁 (고려대학교 신소재공학부) ;
  • 김시연 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 최정식 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 여동훈 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 신효순 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 남산 (고려대학교 신소재공학부)
  • Received : 2019.10.09
  • Accepted : 2019.10.22
  • Published : 2019.10.28
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Abstract

Piezoelectric ceramic specimens with the $Pb(Mg_{1/3}Nb_{2/3})_{0.65}Ti_{0.35}O_3$ (PMN-PT) composition are prepared by the solid state reaction method known as the "columbite precursor" method. Moreover, the effects of the $Li_2O-Bi_2O_3$ additive on the microstructure, crystal structure, and piezoelectric properties of sintered PMN-PT ceramic samples are investigated. The addition of $Li_2O-Bi_2O_3$ lowers the sintering temperature from $1,200^{\circ}C$ to $950^{\circ}C$. 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 ($d_{33}=596pC/N$ and Kp = 57%) and a sintered density of $7.92g/cm^3$ after sintering at $950^{\circ}C$. In addition, the sample exhibits a curie temperature of $138.6^{\circ}C$ 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.

Keywords

References

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