Enhanced initial permeability and dielectric constant in a double-percolating Ni0.3Zn0.7Fe1.95O4-Ni-Polymer composite

被引：62
作者：
Shen, Y [1 ]
Yue, ZX [1 ]
Li, M [1 ]
Nan, CW [1 ]
机构：
[1] Tsinghua Univ, Dept Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 10084, Peoples R China
来源：
ADVANCED FUNCTIONAL MATERIALS | 2005年 / 15卷 / 07期
关键词：
D O I：
10.1002/adfm.200500045
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel, three-phase, double-percolating composite with NiZn-ferrite particles and nickel particles embedded in a poly(vinylidene fluoride) matrix is prepared by a simple hot-pressing method. Large ferrite particles in the composite not only act as a magnetic phase, thus endowing the composite with a high initial permeability, but also present (in a high volume fraction) a discrete (non-percolating) phase, confining polymer and metallic particles into a continuous double-percolating structure of low volume fraction. In particular, a large enhancement in both the initial permeability and the dielectric constant of the three-phase composites is observed, which is due mainly to the addition of a small number of nickel particles that act as both magnetic and percolative metallic phases. The dielectric and magnetic behavior observed in the three-phase composites can be explained by effective-medium and percolation theories.
引用
收藏
页码：1100 / 1103
页数：4
相关论文
共 18 条
  • [1] High-dielectric-constant ceramic-powder polymer composites
    Bai, Y
    Cheng, ZY
    Bharti, V
    Xu, HS
    Zhang, QM
    [J]. APPLIED PHYSICS LETTERS, 2000, 76 (25) : 3804 - 3806
  • [2] Novel ferroelectric polymer composites with high dielectric constants
    Dang, ZM
    Lin, YH
    Nan, CW
    [J]. ADVANCED MATERIALS, 2003, 15 (19) : 1625 - +
  • [3] Dielectric behavior of three-phase percolative Ni-BaTiO3/polyvinylidene fluoride composites
    Dang, ZM
    Shen, Y
    Nan, CW
    [J]. APPLIED PHYSICS LETTERS, 2002, 81 (25) : 4814 - 4816
  • [4] Enhanced dielectric and electromechanical responses in high dielectric constant all-polymer percolative composites
    Huang, C
    Zhang, QM
    [J]. ADVANCED FUNCTIONAL MATERIALS, 2004, 14 (05) : 501 - 506
  • [5] Magnetic properties of high purity nanocrystalline nickel
    Kisker, H
    Gessmann, T
    Wurschum, R
    Kronmuller, H
    Schaefer, HE
    [J]. NANOSTRUCTURED MATERIALS, 1995, 6 (5-8): : 925 - 928
  • [6] LEBOURGEOISA R, 2003, J MAGN MAGN MATER, V191, P254
  • [7] Enhanced electromechanical properties in all-polymer percolative composites
    Li, JY
    Huang, C
    Zhang, QM
    [J]. APPLIED PHYSICS LETTERS, 2004, 84 (16) : 3124 - 3126
  • [8] Applicability of effective medium theory to ferroelectric/ferrimagnetic composites with composition and frequency-dependent complex permittivities and permeabilities
    Mantese, JV
    Micheli, AL
    Dungan, DF
    Geyer, RG
    BakerJarvis, J
    Grosvenor, J
    [J]. JOURNAL OF APPLIED PHYSICS, 1996, 79 (03) : 1655 - 1660
  • [9] Templating organic semiconductors via self-assembly of polymer colloids
    Mezzenga, R
    Ruokolainen, J
    Fredrickson, GH
    Kramer, EJ
    Moses, D
    Heeger, AJ
    Ikkala, O
    [J]. SCIENCE, 2003, 299 (5614) : 1872 - 1874
  • [10] PHYSICS OF INHOMOGENEOUS INORGANIC MATERIALS
    NAN, CW
    [J]. PROGRESS IN MATERIALS SCIENCE, 1993, 37 (01) : 1 - 116
12