ALTERNATING-CURRENT ELECTRICAL-PROPERTIES OF RANDOM METAL-INSULATOR COMPOSITES

被引:38
作者
CHEN, IG [1 ]
JOHNSON, WB [1 ]
机构
[1] OHIO STATE UNIV,DEPT MAT SCI,COLUMBUS,OH 43210
关键词
D O I
10.1007/BF00544665
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The complex a.c. impedance of three different random metal-insulator composites near their percolation threshold has been studied. These three metal-insulator systems include different shapes of nickel particles (filamentary and nodular shapes) in a matrix of polypropylene and silver particles in the matrix of potassium chloride. By using different metal-insulator structures and phases it is possible to elucidate the effect of different metal particle shapes and types of insulator phase on the electrical properties of these composites near their percolation threshold. Electrical properties, including d.c. conductivity, a.c. conductance, capacitance and dielectric loss tangent, of these metal-insulator composites as a function of metal volume fraction and frequency (5 Hz to 13 MHz) are presented. The results are correlated with structural characterization of these composites and are used to examine the applicability of different electrical transport models on these composite materials. The effect of different metal particle shapes on the percolation threshold and the power-law dependent percolation phenomenon is also discussed.
引用
收藏
页码:1565 / 1576
页数:12
相关论文
共 36 条
[1]   PERCOLATION CONDUCTIVITY IN W-AL2O3 GRANULAR METAL-FILMS [J].
ABELES, B ;
PINCH, HL ;
GITTLEMAN, JI .
PHYSICAL REVIEW LETTERS, 1975, 35 (04) :247-250
[2]   THE EXTRACTION OF IONIC CONDUCTIVITIES AND HOPPING RATES FROM AC CONDUCTIVITY DATA [J].
ALMOND, DP ;
HUNTER, CC ;
WEST, AR .
JOURNAL OF MATERIALS SCIENCE, 1984, 19 (10) :3236-3248
[3]   COMPUTER STUDY OF THE PERCOLATION-THRESHOLD IN A TWO-DIMENSIONAL ANISOTROPIC SYSTEM OF CONDUCTING STICKS [J].
BALBERG, I ;
BINENBAUM, N .
PHYSICAL REVIEW B, 1983, 28 (07) :3799-3812
[4]   PERCOLATION THRESHOLDS IN THE 3-DIMENSIONAL STICKS SYSTEM [J].
BALBERG, I ;
BINENBAUM, N ;
WAGNER, N .
PHYSICAL REVIEW LETTERS, 1984, 52 (17) :1465-1468
[5]   SCHER AND ZALLEN CRITERION - APPLICABILITY TO COMPOSITE SYSTEMS [J].
BALBERG, I ;
BINENBAUM, N .
PHYSICAL REVIEW B, 1987, 35 (16) :8749-8752
[6]   PERCOLATION IN A COMPOSITE OF RANDOM STICK-LIKE CONDUCTING PARTICLES [J].
BALBERG, I ;
BOZOWSKI, S .
SOLID STATE COMMUNICATIONS, 1982, 44 (04) :551-554
[7]   REVIEW ON METAL-FILLED PLASTICS .1. ELECTRICAL-CONDUCTIVITY [J].
BHATTACHARYA, SK ;
CHAKLADER, ACD .
POLYMER-PLASTICS TECHNOLOGY AND ENGINEERING, 1982, 19 (01) :21-51
[8]   MECHANICAL, THERMAL, AND ELECTRICAL-PROPERTIES OF METAL FIBER-FILLED POLYMER COMPOSITES [J].
BIGG, DM .
POLYMER ENGINEERING AND SCIENCE, 1979, 19 (16) :1188-1192
[9]  
Broadbent S. R., 1957, P CAMBRIDGE PHIL SOC, V53, P629, DOI [10.1017/S0305004100032680, DOI 10.1017/S0305004100032680]
[10]   PERCOLATION IN SHORT FIBERS EPOXY-RESIN COMPOSITES - CONDUCTIVITY BEHAVIOR AND FINITE SIZE EFFECTS NEAR THRESHOLD [J].
CARMONA, F ;
PRUDHON, P ;
BARREAU, F .
SOLID STATE COMMUNICATIONS, 1984, 51 (04) :255-257