Test method for thermal expansion of refractory products

This technical specification establishes a systematic procedure for evaluating the linear thermal expansion behavior of refractory products. The document outlines the necessary apparatus, including furnaces and dilatometers, required to conduct measurements with specified accuracy. It details the preparation of test specimens, ensuring dimensions and surface conditions meet rigorous requirements before being subjected to controlled heating cycles. The methodology describes the heating rate, temperature range, and holding times to be applied during the test process. Furthermore, it provides guidance on data recording, calculation methods for determining expansion coefficients, and the format for reporting results. This approach enables consistent assessment of how refractory materials respond to thermal stress, which is critical for applications in high-temperature industrial environments. The procedure ensures that variations in material composition or manufacturing processes can be objectively compared based on their dimensional changes under heat. By following these prescribed steps, laboratories and manufacturers can achieve reproducible data regarding the thermal stability of ceramic and non-metallic inorganic materials used in furnaces, kilns, and other thermal systems. The document serves as a foundational reference for quality control and material selection in the refractory industry without dictating specific performance thresholds.