Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Fabrication of High Density BZN-PVDF Composite Film by Aerosol Deposition for High Energy Storage Properties

상온분말분사공정을 이용한 고밀도 폴리머-세라믹 혼합 코팅층 제조 및 에너지 저장 특성 향상

  • Lim, Ji-Ho (Department of Materials Science and Engineering, Inha University) ;
  • Kim, Jin-Woo (Department of Materials Science and Engineering, Inha University) ;
  • Lee, Seung Hee (Department of Materials Science and Engineering, Inha University) ;
  • Park, Chun-kil (Department of Materials Science and Engineering, Inha University) ;
  • Ryu, Jungho (School of Materials Science & Engineering, Yeungnam University) ;
  • Choi, Doo hyun (Agency for Defense Development) ;
  • Jeong, Dae-Yong (Department of Materials Science and Engineering, Inha University)
  • Received : 2018.11.28
  • Accepted : 2019.01.14
  • Published : 2019.03.27
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Abstract

This study examines paraelectric $Bi_{1.5}Zn_{1.0}Nb_{1.5}O_7$ (BZN), which has no hysteresis and high dielectric strength, for energy density capacitor applications. To increase the breakdown dielectric strength of the BZN film further, poly(vinylidene fluoride) BZN-PVDF composite film is fabricated by aerosol deposition. The volume ratio of each composition is calculated using dielectric constant of each composition, and we find that it was 12:88 vol% (BZN:PVDF). To modulate the structure and dielectric properties of the ferroelectric polymer PVDF, the composite film is heat-treated at $200^{\circ}C$ for 5 and 30 minutes following quenching. The amount of ${\alpha}-phase$ in the PVDF increases with an increasing annealing time, which in turn decreases the dielectric constant and dielectric loss. The breakdown dielectric strength of the BZN film increases by mixing PVDF. However, the breakdown field decreases with an increasing annealing time. The BZN-PVDF composite film has the energy density of $4.9J/cm^3$, which is larger than that of the pure BZN film of $3.6J/cm^3$.

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References

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