{'fraction_non_alphanumeric': 0.027979274611398965, 'fraction_numerical': 0.03005181347150259, 'mean_word_length': 5.1923076923076925, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Effect of Temperature History on the Thermal and Mechanical Properties of Fibrous Fumed Alumina Compacts

In recent years, new thermal insulation materials with lower thermal conductivity and light weight have been developed. However, their practical use is limited only under 1000°C. In this paper, the performances of thermal insulation properties of fibrous fumed alumina compact were evaluated at the temperature up to 1200°C. As a result, it revealed low thermal conductivity in the range of 0.040–0.065 W/(m·K) between 200°C and 1000°C. However, after receiving the temperature history of 1200°C processing, its thermal conductivity increased up to 1.4 times compared to that before heat processing. On the contrary, the compressive strength was not changed by the temperature history. The increase of thermal conductivity by the temperature history was explained by the increase of solid thermal conductivity due to the sintering of particles in the compact.