Using poly(amic acid)(PAA)as a precursor followed by thermal imidization,the polyimide/barium titanate composite films were successfully prepared by a direct mixing method and in situ process.The influence of processi...Using poly(amic acid)(PAA)as a precursor followed by thermal imidization,the polyimide/barium titanate composite films were successfully prepared by a direct mixing method and in situ process.The influence of processing factors,such as particle size,distribution mode and polymerization method on dielectric prop-erties was studied.Results revealed that the dielectric constant(ε)of the composite film increased by using bigger fillers or employing in situ polymerization and bimodal distribution.When the composite film contain-ing 50 Vol-%of BaTiO3 with size in 100 nm was pre-pared via in situ process,its dielectric constant reached 45 at 10 kHz.展开更多
基金the National Natural Science Foundation of China(Grant No.50103010)the Education Department of Zhejiang Province(No.20071157)for supporting this work.
文摘Using poly(amic acid)(PAA)as a precursor followed by thermal imidization,the polyimide/barium titanate composite films were successfully prepared by a direct mixing method and in situ process.The influence of processing factors,such as particle size,distribution mode and polymerization method on dielectric prop-erties was studied.Results revealed that the dielectric constant(ε)of the composite film increased by using bigger fillers or employing in situ polymerization and bimodal distribution.When the composite film contain-ing 50 Vol-%of BaTiO3 with size in 100 nm was pre-pared via in situ process,its dielectric constant reached 45 at 10 kHz.
