1 Scope
This part of IEC 61189
defines the method to be followed for the determination of the X/Y coefficient of
thermal expansion of thin electrical insulating materials via the use of a thermomechanical
analyser (TMA). This method is applicable to materials that are solid for the entire
range of temperature used, and that retain sufficient rigidity over the temperature
range so that so that irreversible indentation of the specimen by the sensing probe
does not occur.