Electrical resistance: precision alloys with high resistivity

Electrical resistivity (denoted by the symbol ρ) is a physical characteristic that describes the ability of a material to prevent the passage of electric current. It is usually measured in Ohm•meter. It depends on the chemical composition of the alloy, structure, temperature and other properties. Precision alloys with high electrical resistivity have good insulating properties, while materials with low resistivity are excellent conductors.

Specific electrical conductivity and its relationship with electrical resistivity

Specific electrical conductivity material (measured in Siemens per meter) is a physical quantity that characterizes the ability of a material to conduct electric current. It is inversely proportional to the electrical resistivity. That is, the higher the electrical conductivity, the better the material conducts electric current, and vice versa.

Factors affecting electrical resistivity

The ability of a material to conduct electric current depends on a number of factors, the main of which are:

• The purity of the material. Availability impurities, defects and other shortcomings in the alloy can increase its electrical resistivity. In most cases, the purer the material, the lower its resistivity.
• The working temperature of the material. As a rule, as the temperature rises, the resistivity of the alloy increases due to an increase in the number of collisions between atoms and electrons.
• Chemical composition. It is the chemical elements that make up the alloy that determine the amount of free electrons in the material: the more electrons there are, the easier the electric current flows. Due to the presence of free electrons, metals often have low electrical resistivity.
• Crystal lattice and alloy structure. The presence of defects in the crystals of the material can increase its electrical resistivity.

Precision alloys with high resistivity have high parameter stability and can be used in various electrical devices that require accurate control of electric current. They are widely used as heating elements in industrial plants and other specialized devices.

Alloys with high electrical resistance produced by PZPS

St. Petersburg Precision Alloy Plant produces a number of materials with high electrical resistivity. Among them are:

• fehral stamps X15YU5, X23U5, X23YU5T;
• nichrome brands X20N80N, X15N60N.

In addition, in PZPS Research Center The production of analogues of Inconel and Hastelloy alloys is actively developing. These materials can be used as substrates for high-temperature thin-film superconductors, which makes them popular in modern technologies. To order the required precision materials, please call +7 (812) 740-76—55 or leave a request on the site. Our experts will contact you and tell you in detail about the terms of cooperation.

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