ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract Conductive behaviour in copper powder-filled paint films was subdivided into three regions, I, II, and III, with copper loading. Paint films were insulators in Region I. In Region II, resistivity decreased linearly in proportion to the cube root of the volume concentration, V, of the copper powders, reaching a minimum value at a certain V, which is the critical volume concentration, V c, of copper powders. V c, increased linearly in proportion to the bulk density of branched copper powders. This suggests that conductivity in the region is dependent upon the packing state of the copper particles. V c, and resistivity at V c, decreased with decrease in the grain size of isotropic branched and spherical copper powders, although they increased for flake copper powders. In Region III, resistivity increased with increase in copper loading. The increase in resistivity was due to the decrease in the apparent density of dry paint films.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00357810
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