Kostoglou Nikolaos, Tampaxis Christos, Charalambopoulou Georgia, Constantinides Georgios, Ryzhkov Vladislav, Doumanidis Charalabos, Matovic Branko, Mitterer Christian, Rebholz Claus
Department of Materials Science, Montanuniversität Leoben, 8700 Leoben, Austria.
National Center for Scientific Research Demokritos, 15341 Athens, Greece.
Nanomaterials (Basel). 2020 Dec 5;10(12):2435. doi: 10.3390/nano10122435.
Nanotubes made of boron nitride (BN) and carbon have attracted considerable attention within the literature due to their unique mechanical, electrical and thermal properties. In this work, BN and carbon nanotubes, exhibiting high purity (>99%) and similar surface areas (~200 m/g), were systematically investigated for their thermal stability and oxidation behavior by combining thermal gravimetric analysis and differential scanning calorimetry methods at temperatures of up to ~1300 °C under a synthetic air flow environment. The BN nanotubes showed a good resistance to oxidation up to ~900 °C and fully transformed to boron oxide up to ~1100 °C, while the carbon nanotubes were stable up to ~450 °C and almost completely combusted up to ~800 °C. The different oxidation mechanisms are attributed to the different chemical nature of the two types of nanotubes.
由氮化硼（BN）和碳制成的纳米管因其独特的机械、电学和热学性能而在文献中引起了相当大的关注。在这项工作中，通过在合成空气流环境下，在高达约1300°C的温度下结合热重分析和差示扫描量热法，对纯度高（>99%）且表面积相似（约200 m²/g）的BN和碳纳米管的热稳定性和氧化行为进行了系统研究。BN纳米管在高达约900°C时表现出良好的抗氧化性，在高达约1100°C时完全转化为氧化硼，而碳纳米管在高达约450°C时稳定，在高达约800°C时几乎完全燃烧。不同的氧化机制归因于两种纳米管不同的化学性质。
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