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

页码：1100 / 1103

页数：4

共 18 条

[1] High-dielectric-constant ceramic-powder polymer composites [J].

Bai, Y ;

Cheng, ZY ;

Bharti, V ;

Xu, HS ;

Zhang, QM .

APPLIED PHYSICS LETTERS, 2000, 76 (25) :3804-3806

[2] Novel ferroelectric polymer composites with high dielectric constants [J].

Dang, ZM ;

Lin, YH ;

Nan, CW .

ADVANCED MATERIALS, 2003, 15 (19) :1625-+

[3] Dielectric behavior of three-phase percolative Ni-BaTiO3/polyvinylidene fluoride composites [J].

Dang, ZM ;

Shen, Y ;

Nan, CW .

APPLIED PHYSICS LETTERS, 2002, 81 (25) :4814-4816

[4] Enhanced dielectric and electromechanical responses in high dielectric constant all-polymer percolative composites [J].

Huang, C ;

Zhang, QM .

ADVANCED FUNCTIONAL MATERIALS, 2004, 14 (05) :501-506

[5] Magnetic properties of high purity nanocrystalline nickel [J].

Kisker, H ;

Gessmann, T ;

Wurschum, R ;

Kronmuller, H ;

Schaefer, HE .

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 [J].

Li, JY ;

Huang, C ;

Zhang, QM .

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 [J].

Mantese, JV ;

Micheli, AL ;

Dungan, DF ;

Geyer, RG ;

BakerJarvis, J ;

Grosvenor, J .

JOURNAL OF APPLIED PHYSICS, 1996, 79 (03) :1655-1660

[9] Templating organic semiconductors via self-assembly of polymer colloids [J].

Mezzenga, R ;

Ruokolainen, J ;

Fredrickson, GH ;

Kramer, EJ ;

Moses, D ;

Heeger, AJ ;

Ikkala, O .

SCIENCE, 2003, 299 (5614) :1872-1874

[10] PHYSICS OF INHOMOGENEOUS INORGANIC MATERIALS [J].

NAN, CW .

PROGRESS IN MATERIALS SCIENCE, 1993, 37 (01) :1-116

← 1 2 →