采用微波水热法合成制备出NBT(Na 0.5 Bi 0.5 TiO 3,简称NBT)粉体,以及固相法合成了钛酸锶(SrTiO 3,简称ST)粉体,再采用溶液流延法分别制备填充了不同NBT含量的NBT-ST/PVDF复合膜,并研究了不同含量的NBT对复合膜击穿场强与储能密度的影...采用微波水热法合成制备出NBT(Na 0.5 Bi 0.5 TiO 3,简称NBT)粉体,以及固相法合成了钛酸锶(SrTiO 3,简称ST)粉体,再采用溶液流延法分别制备填充了不同NBT含量的NBT-ST/PVDF复合膜,并研究了不同含量的NBT对复合膜击穿场强与储能密度的影响.研究结果表明:在NBT含量为0.5%时,复合膜具有最大的储能密度,达到8.5 J/cm ^3.展开更多
A new sandwiched polyoxometalate [HK11Cd4Cl2（PW9034）2]·18H2O （1）, incor- porating a unique hybrid tetranuclear cadmium cluster （abbreviated to {Cd4}） with two trivacant polyanions [B-α-PW9O34]9-, has been ...A new sandwiched polyoxometalate [HK11Cd4Cl2（PW9034）2]·18H2O （1）, incor- porating a unique hybrid tetranuclear cadmium cluster （abbreviated to {Cd4}） with two trivacant polyanions [B-α-PW9O34]9-, has been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectroscopy, UV-vis, and single-crystal X-ray diffraction analysis. Crystal data for 1： monoclinic, space group C2/c, a = 19.2997（4）, b = 13.8014（3）, c = 31.9819（8） A, β = 102.764（2）°, V= 8308.3（3） A3, Z = 4, P2O86Cl2K11Cd4W18H37, Mr = 5735.13, Dc = 4.584 mg-mm-3, F（000） = 10084, μ = 26.579 mm-1, the final R = 0.0378 and wR = 0.0989 for 6558 observed reflections （I〉 2σ（I））. X-ray crystallographic study shows that the molecular structure of 1 contains four cadmium atoms. Two CdO6 distorted octahedra and two CdOsC1 distorted octahedra combine with each other in turn via edge-sharing, resulting in a regular rhomb-like cluster sandwiched between two {B-a-PW9034} units. Further, the sandwich-type polyoxoanions were connected by K＋ ions to form a complicated 3-D open-framework through connecting with each terminal O atom of the [Cd4C12（PW9O34）2]12- polyoxoanions. In addition, compound 1 exhibits photoluminescence property at room temperature and the band gap can be assessed at 3.25 eV.展开更多
文摘采用微波水热法合成制备出NBT(Na 0.5 Bi 0.5 TiO 3,简称NBT)粉体,以及固相法合成了钛酸锶(SrTiO 3,简称ST)粉体,再采用溶液流延法分别制备填充了不同NBT含量的NBT-ST/PVDF复合膜,并研究了不同含量的NBT对复合膜击穿场强与储能密度的影响.研究结果表明:在NBT含量为0.5%时,复合膜具有最大的储能密度,达到8.5 J/cm ^3.
基金Supported by theNNSFC(No.51108122)Open Project of State Key Laboratory of Urban Water Resource and Environment,Harbin Institute of Technology(No.QA201025)+1 种基金Fundamental Research Funds for the Central Universities(No.HIT.NSRIF.2010053)Science and Technology Innovation Talents Special Foundation of Harbin(2010RFQXG035 and 2007RFXXG018)
文摘A new sandwiched polyoxometalate [HK11Cd4Cl2（PW9034）2]·18H2O （1）, incor- porating a unique hybrid tetranuclear cadmium cluster （abbreviated to {Cd4}） with two trivacant polyanions [B-α-PW9O34]9-, has been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectroscopy, UV-vis, and single-crystal X-ray diffraction analysis. Crystal data for 1： monoclinic, space group C2/c, a = 19.2997（4）, b = 13.8014（3）, c = 31.9819（8） A, β = 102.764（2）°, V= 8308.3（3） A3, Z = 4, P2O86Cl2K11Cd4W18H37, Mr = 5735.13, Dc = 4.584 mg-mm-3, F（000） = 10084, μ = 26.579 mm-1, the final R = 0.0378 and wR = 0.0989 for 6558 observed reflections （I〉 2σ（I））. X-ray crystallographic study shows that the molecular structure of 1 contains four cadmium atoms. Two CdO6 distorted octahedra and two CdOsC1 distorted octahedra combine with each other in turn via edge-sharing, resulting in a regular rhomb-like cluster sandwiched between two {B-a-PW9034} units. Further, the sandwich-type polyoxoanions were connected by K＋ ions to form a complicated 3-D open-framework through connecting with each terminal O atom of the [Cd4C12（PW9O34）2]12- polyoxoanions. In addition, compound 1 exhibits photoluminescence property at room temperature and the band gap can be assessed at 3.25 eV.
