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coefficient of thermal expansion (CTE)

When materials are heated, they expand. The degree of expansion with temperature is the coefficient of thermal expansion

, CTE. The coefficient of thermal expansion is shown by the expansion of a body in all three dimensions. The coefficient of thermal expansion depends on the material and is expressed in parts per million (ppm) relative to Kelvin (ppm/K). For quartz

, the coefficientof thermal expansion is 0.6 x 10exp-6 per Kelvin, for copper

it is17 x 10exp-6 per Kelvin, and for lead

it is29 x 10exp-6 per Kelvin.

There are also materials that contract rather than expand with increasing temperature. This is called contraction. An example of this is water at temperatures between 4 °C and 0 °C.

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Englisch: coefficient of thermal expansion - CTE
Updated at: 12.04.2019
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