How is coefficient of thermal expansion measured?
To determine the coefficient, the volume of the material is carefully measured as the temperature rises from one known value to another. There are a few examples of dilatometers that are designed to measure the volume of solid metal pieces to determine thermal expansion. One design is the capacitance dilatometers.
What is the unit of thermal expansion coefficient in MM?
Expansion is typically measured in units of 0.00001 mm. CTE is expressed as the expansion for a standard unit of length so that values can be compared. If a sample of 12.36mm expands by 0.00021mm, the expansion is expressed as . 00021mm/12.36mm.
What is the SI unit of expansion?
SI unit & Dimension
The SI unit of coefficient of linear expansion can be expressed as °C–1 or °K–1. Here, C indicates Celsius and K indicates Kelvin. The dimension of coefficient of linear expansion will be M0L0T0K−1.