Applications of Dilatometers in Thermal-Deformation Studies

A dilatometer measures dimensional change as temperature varies and calculates linear or volumetric coefficients of thermal expansion. It is used in research, production, and quality inspection of ceramics, metals, glass, and polymers.

For ceramics and refractories, measurements of ceramic bodies, finished wares, blast-furnace bricks, and kiln linings support assessment of expansion and thermal growth. Ceramic products may be controlled within a coefficient-of-thermal-expansion range of approximately 0.5 × 10⁻⁶/°C to 3 × 10⁻⁶/°C, while refractory measurements address temperatures above 1,000 °C.

For metals and alloys, expansion data support comparison of compositions and processes, including piston materials, glass- or ceramic-matched electronic-packaging alloys, and automotive brake-pad friction layers and steel backings. For glass and polymers, the instrument is used with glass compositions, plastics, rubber, and composites. Heat-resistant glass may have a coefficient as low as 1 × 10⁻⁶/°C; the measurements also support compatibility checks for appliance housings and construction sealants.