This study examines paraelectric Bi1.5Zn1.0Nb1.5O7 (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 oC for 5 and 30 minutes following quenching. The amount of α-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 4.9 J/cm3, which is larger than that of the pure BZN film of 3.6 J/cm3.

Abstracts
 1. 서 론
 2. 실험 방법
 3. 결과 및 고찰
 4. 결 론
 References

• 임지호(인하대학교 신소재공학과) | Ji-Ho Lim (Department of Materials Science and Engineering, Inha University)
• 김진우(인하대학교 신소재공학과) | Jin-Woo Kim (Department of Materials Science and Engineering, Inha University)
• 이승희(인하대학교 신소재공학과) | Seung Hee Lee (Department of Materials Science and Engineering, Inha University)
• 박춘길(인하대학교 신소재공학과) | Chun-kil Park (Department of Materials Science and Engineering, Inha University)
• 류정호(영남대학교) | Jungho Ryu (School of Materials Science & Engineering, Yeungnam University)
• 최두현(국방과학연구소) | Doo hyun Choi (Agency for Defense Development)
• 정대용(인하대학교 신소재공학과) | Dae-Yong Jeong (Department of Materials Science and Engineering, Inha University) Corresponding author