ACS Nano·· 9 小时前精选AI 评分62
聚合物前驱体转化制备TaC陶瓷气凝胶，2000 °C真空热处理后结构保持
Polymer-Derived Tantalum Carbide Ceramic Aerogel Monoliths for Ultrahigh-Temperature Thermal Insulation up to 2000 °C
AI 导读
研究通过聚合物前驱体转化法结合溶–胶技术制备了碳化钽（TaC）陶瓷气凝胶整块材料，在1500 °C的较低温度下获得珍珠项链状结构。所得气凝胶密度为0.46–0.63 g/cm3，BET比表面积为95.15–148.17 m2/g，热导率为0.046–0.058 W·m–1·K–1，压缩强度为0.043–0.297 MPa。
推荐理由
原文给出了TaC气凝胶的密度、比表面积与热导率区间，并展示2000 °C真空热处理后结构保持情况，读者可据此判断其超高温隔热适用边界。
创新点
以聚合物前驱体气凝胶热解路线在1500 °C较低温度下得到珍珠项链状TaC气凝胶整块材料，并在2000 °C真空热处理后仍保持结构与低热导率。
图表、补充材料与最终表述以原文为准。阅读原文
来源：ACS Nano · doi.org
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