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Nevertheless, their practical applications are usually constrained by their inherent brittleness when subjected to rigorous conditions. Herein, employing hafnium dichloride oxide octahydrate (HfOCl2\u00b78H2O) as the hafnium source and resorcinol\u2013formaldehyde (RF) as the carbon precursor, hafnium carbide (HfC) aerogels are fabricated via the sol-gel method complemented with carbothermal reduction reaction. Investigations are conducted into the effects of various molar ratios, duration, and temperatures of calcination on the microstructural features and physico-chemical characteristics of the as-prepared HfC aerogel. The aerogel shows a high BET-specific surface area (601.02 m2\/g), which is much larger than those of previously reported aerogels. Furthermore, the HfC aerogel exhibits a low thermal conductivity of 0.053 W\/(m\u00b7K) and a compressive strength of up to 6.12 MPa after carbothermal reduction at 1500 \u00b0C. These excellent thermal insulation and mechanical properties ensure it is ideal for the utilization of high-temperature thermal resistance and thermal insulation in the fields of aerospace.<\/jats:p>","DOI":"10.3390\/gels9100839","type":"journal-article","created":{"date-parts":[[2023,10,23]],"date-time":"2023-10-23T10:34:20Z","timestamp":1698057260000},"page":"839","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Facile Preparation of a Novel HfC Aerogel with Low Thermal Conductivity and Excellent Mechanical Properties"],"prefix":"10.3390","volume":"9","author":[{"given":"Wei","family":"Wang","sequence":"first","affiliation":[{"name":"College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China"},{"name":"Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211800, China"},{"name":"Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhanwu","family":"Wu","sequence":"additional","affiliation":[{"name":"Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shicong","family":"Song","sequence":"additional","affiliation":[{"name":"Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Qi","family":"You","sequence":"additional","affiliation":[{"name":"College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China"},{"name":"Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211800, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sheng","family":"Cui","sequence":"additional","affiliation":[{"name":"College of Materials Science and Engineering, Nanjing Tech University, Nanjing 210009, China"},{"name":"Jiangsu Collaborative Innovation Center for Advanced Inorganic Function Composites, Nanjing Tech University, Nanjing 211800, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Weimin","family":"Shen","sequence":"additional","affiliation":[{"name":"Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Guoqing","family":"Wang","sequence":"additional","affiliation":[{"name":"Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xuanfeng","family":"Zhang","sequence":"additional","affiliation":[{"name":"Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiaofei","family":"Zhu","sequence":"additional","affiliation":[{"name":"Shanghai Space Propulsion Technology Research Institute, Huzhou 313000, China"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2023,10,23]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"110048","DOI":"10.1016\/j.compositesb.2022.110048","article-title":"Effect of silica aerogel on thermal insulation and acoustic absorption of geopolymer foam composites: The role of aerogel particle size","volume":"242","author":"Chen","year":"2022","journal-title":"Compos. 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