Thermal Conductivity

What is Thermal Conductivity?

Thermal conductivity refers to the ability of a material to conduct heat. In metals and alloys, this property is particularly significant due to their structure, free-moving electrons facilitate heat transfer efficiently from one part of the material to another. This makes materials like stainless steel, copper, aluminium, and silver excellent thermal conductors, widely used in heat exchangers, electronics, and cookware.

What is the Coefficient of Thermal Conductivity?

The coefficient of thermal conductivity is a numerical value that quantifies how well a material conducts heat. This coefficient, often represented by the Greek letter k, depends on the material’s composition and structure. A higher value indicates greater heat-conducting ability.

The coefficient varies across materials. Metals and alloys generally have high thermal conductivity coefficients, whereas materials like wood, rubber, or plastic have much lower values.

What is the SI Unit of Thermal Conductivity?

When understanding what is thermal conductivity, it is important to understand its standard unit of measurement. The SI unit of thermal conductivity is watts per metre per kelvin (W/m·K). This unit expresses how much heat (in watts) is transferred per metre of material for every degree of temperature difference (in kelvin).