The ability of an object to pass an electric current is called conduction. Different metals have different conductivities, generally silver has the best conductivity, followed by copper and gold. Solid-state conduction refers to the long-distance migration of electrons or ions in a solid under the action of an electric field, usually a charge carrier, such as: an electron conductor, which conducts electricity mainly with electron carriers; Conductivity of the host; and mixed conductors, which have both carrier electrons and ions. In addition, some electrical phenomena are not caused by carrier migration, but solid polarization caused by electric field, such as dielectric phenomena and dielectric materials.
In general, metals, semiconductors, electrolytes, melt electrolytes and some non-metals can conduct electricity. The electrical conductivity of non-electrolyte objects depends on the number of free electrons in its atomic outer shell and its crystal structure. For example, metals contain a large number of free electrons, and most non-metals are not easy to conduct electricity due to their extremely small number of free electrons. Diamond has electrical conductivity, which is related to the difference in its crystal structure. Electrolytes conduct electricity because anions are formed when ionic compounds are dissolved or melted, and thus conduct electricity.
As a conductive metal other than silver, copper is usually used in important cables and conductive plates. The higher the purity, the better the conductivity.
As a 3D porous structure material made of copper as raw material, the better the quality of copper foam and the higher the manufacturing technology, the higher the purity of copper, and the better the electrical conductivity accordingly.
The electrical conductivity of metal foam is related to the electrical conductivity of the bulk metal. In many cases, there are oxides with poor conductivity on the surface of the base metal, and there are a lot of bad conductors of electricity in the porous structure of the foamed metal, so the conductivity of the foamed metal is not as good as that of the bulk metal.
In the balance of electrical conductivity and 3D porous structure, several models have been developed that take into account both. In application, although the electrical conductivity is not as good as that of solid pure copper cables and sheets, the advantages of the 3D porous structure are fully exerted. Compared with non-solid pure copper material, the electrical conductivity of copper foam is better.
Post time: Apr-11-2022
