에어로졸 데포지션을 이용하여 증착한 나노 그레인의 혼합 BaTiO3－NaNbO3 박막 의 전기적 특성과 구조 관찰

초록

Dielectric properties of Nano-grained BaTiO3－NaNbO3 films by aerosol deposition AD를 이용한 BaTiO3－NaNbO3 박막 의 유전 특성 윤송현1 박춘길2 임지호2 류정호3 최종진3 정대용2 1인하대학교 재료공정공학과, 2인하대학교 신소재공학과, 3KIMS 재료연구소 기능세라믹 연구실 BaTiO3 (BT) and NaNbO3 (NN) was mixed at a molar ratio of 5: 5, and then an BT-NN films of with a thickness 5~10㎛ of were fabricated by aerosol deposition(AD) process. Then, a heat treatment was performed at 350, 450, 550, 650℃. The XRD analysis of the BT-NN film revealed that the crystallinity was reduced at 350 and 650. The temperatures were the phase transition temperature of NN. The polarization - electric field (P-E) hysteresis loops were examined by standard ferroelectic test system. As a result, It was confirmed that the remanent polarization(Pr) and the saturation polarization(Ps) increase and the ferroelectricity improves at the temperature range of 450 to 650 ° C. The polarization-electric field(P-E) hysteresis loops were shifted to higher values. And It is possible to search for new materials which are not known in the past or which are not fundamentally compounded.