TY - GEN
T1 - Preparation and Dielectric Property of Al2O3 Surface Coating Modified BaTiO3/Polyimide Composite Film
AU - Wang, Ya Jun
AU - Wu, Xiao Juan
AU - Feng, Chang Gen
PY - 2014
Y1 - 2014
N2 - Polyimide (PI) was chosen as the matrix of the composite, barium titanate/polyimide (BT/PI) nanocomposite films were prepared by in situ polymerization. In order to improve the dispersion and the physical-chemical properties of BT surface, barium titanate was modified by Al2O3 coating and modified BT/PI nanocomposite films were prepared. The prepared modified BT was characterized by X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), and the dielectric properties of the composites were characterized in detail. It was shown that surface modification with Al2O3 is the chemical process and there were new substances forming. When BT was modified by 10 wt% Al2O3, the dielectric constant of the composite film was 18.96 (103 Hz), the loss tangent 0.005, breakdown strength 70 MV·m-1, energy storage density 0.41 J·cm-3. The dielectric constant of BT modified by Al2O3 is decreased while the dielectric strength of the modified BT/PI composite film is increased.
AB - Polyimide (PI) was chosen as the matrix of the composite, barium titanate/polyimide (BT/PI) nanocomposite films were prepared by in situ polymerization. In order to improve the dispersion and the physical-chemical properties of BT surface, barium titanate was modified by Al2O3 coating and modified BT/PI nanocomposite films were prepared. The prepared modified BT was characterized by X-ray diffraction (XRD) analysis, and scanning electron microscopy (SEM), and the dielectric properties of the composites were characterized in detail. It was shown that surface modification with Al2O3 is the chemical process and there were new substances forming. When BT was modified by 10 wt% Al2O3, the dielectric constant of the composite film was 18.96 (103 Hz), the loss tangent 0.005, breakdown strength 70 MV·m-1, energy storage density 0.41 J·cm-3. The dielectric constant of BT modified by Al2O3 is decreased while the dielectric strength of the modified BT/PI composite film is increased.
KW - Dielectric constant
KW - Nanometer barium titanate
KW - Polyimide
KW - Storage energy density
KW - Surface coating modification
UR - http://www.scopus.com/inward/record.url?scp=84898907648&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.908.63
DO - 10.4028/www.scientific.net/AMR.908.63
M3 - Conference contribution
AN - SCOPUS:84898907648
SN - 9783038350644
T3 - Advanced Materials Research
SP - 63
EP - 66
BT - Materials Science, Environment Protection and Applied Research
PB - Trans Tech Publications
T2 - 2nd International Conference on Environmental Science and Material Application, ESME 2014
Y2 - 22 March 2014 through 23 March 2014
ER -