Preparation and electrocatalytic activities of Pt-TiO_2 nanotubes(Ba_ 0.57Sr_ 0.33Ca_ 0.10)TiO_3 powders,prepared by the sol-gel method,were doped MnCO_3 as acceptor and Dy_2O_3 as donor.This powder was mixed with an ...Preparation and electrocatalytic activities of Pt-TiO_2 nanotubes(Ba_ 0.57Sr_ 0.33Ca_ 0.10)TiO_3 powders,prepared by the sol-gel method,were doped MnCO_3 as acceptor and Dy_2O_3 as donor.This powder was mixed with an organic vehicle and BSCT thick films were fabricated by the screen-printing techniques on alumina substrate.The structural and dielectric properties of BSCT thick films were investigated with variation of Dy_2O_3 amount.As a result of the differential thermal analysis(DTA),exothermic peak was observed at around 670℃ due to the formation of the polycrystalline perovskite phase.All the BSCT thick films showed the XRD patterns of a typical polycrystalline perovskite structure.The average grain size of BSCT thick films decreased with increasing amount of Dy_2O_3.The relative dielectric constant and dielectric loss of the BSCT thick film doped Dy_2O_3 0.1mol% were 4637.4 and 1.6% at 1kHz,respectively.展开更多
基金KEI(R-2005-7-094)which is funded by MOCIE(Ministry of commerce,industry and energy)Mr.Parkand Ms.Nohare grateful tothe secondstage of BK21 programfor supporting a fellowship
文摘Preparation and electrocatalytic activities of Pt-TiO_2 nanotubes(Ba_ 0.57Sr_ 0.33Ca_ 0.10)TiO_3 powders,prepared by the sol-gel method,were doped MnCO_3 as acceptor and Dy_2O_3 as donor.This powder was mixed with an organic vehicle and BSCT thick films were fabricated by the screen-printing techniques on alumina substrate.The structural and dielectric properties of BSCT thick films were investigated with variation of Dy_2O_3 amount.As a result of the differential thermal analysis(DTA),exothermic peak was observed at around 670℃ due to the formation of the polycrystalline perovskite phase.All the BSCT thick films showed the XRD patterns of a typical polycrystalline perovskite structure.The average grain size of BSCT thick films decreased with increasing amount of Dy_2O_3.The relative dielectric constant and dielectric loss of the BSCT thick film doped Dy_2O_3 0.1mol% were 4637.4 and 1.6% at 1kHz,respectively.
