Many friends at work ask, how is the electrical resistivity of conductive plastics tested? To understand this, we need to first know what definition of resistivity is. Electrical resistivity is a physical quantity used to indicate the electrical resistance characteristics of various substances. The ratio of the product of the resistance and cross-sectional area of a component made of a certain substance (at room temperature of 20 ° C) to its length is called the resistivity of that substance. Resistivity is independent of factors such as the length and cross-sectional area of a conductor. It is the electrical property of the conductor data itself, determined by the conductor data, and is related to temperature. Its international unit is Ω · m.

The formula for calculating the resistivity of conductive plastics is R= ρ L/S, during which ρ It is the resistivity, L is the length of the data, and S is the area. It can be seen that the resistance of data is directly proportional to its length, that is, when the data and cross-sectional area remain constant, the longer the length, the greater the data resistance; and inversely proportional to the cross-sectional area of the data, that is, when the data and cross-sectional area remain constant, the larger the cross-sectional area, the smaller the resistance.

Article source: Taishan conductive mica particles

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