Round-Robin Measurements of the Apparent Thermal Conductivity of Two Refractory Insulation Materials, Using High-Temperature Guarded-Hot-Plate Apparatus

摘要

The report presents the test results and analysis of round-robin measurements of apparent thermal conductivity for two kinds of refractory insulation board using high-temperature guarded-hot-plate apparatus. The round robin was carried out under the sponsorship of the American Society for Testing and Materials (ASTM) Subcommittee C-16.30 on Thermal Measurements. To complete the measurement program in a timely manner the participants chose to measure different specimens, selected, however, from the same production lot. The test results for apparent thermal conductivity illustrate the inter-laboratory reproducibility as well as the temperature and density dependence. The data include the temperature range from 297 to 773 K. The standard deviation is 7.4% for the 48 test results reported by seven participating laboratories for fibrous alumina-silica. The standard deviation is 8.0% for the 58 test results reported for calcium silicate.