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在高温下具有低导热性和扩散性,使用稳定的高氧化物纳米粒子

Ka Man Chung¹, Sarath R Adapa², Yu Pei²

¹Program in Materials Science and Engineering, University of California, San Diego, La Jolla, CA, 92093, USA.

Advanced materials (Deerfield Beach, Fla.)

|December 27, 2024

概括

研究人员使用高氧化纳米粒子开发了一种新型多孔固体隔热材料. 这种材料在高温下达到非常低的导热率,使先进的热管理解决方案成为可能.

科学领域:

材料科学材料科学材料科学
纳米技术纳米技术
热力工程是热力工程中的一个.

背景情况:

高温隔热对于各种工业应用中的能源效率和安全至关重要.
现有的材料在高温下往往会降解或失去有效性.
为极端条件开发稳定,高性能绝缘仍然是一个重大挑战.

研究的目的:

报告在高温下具有低导热率的多孔固体隔热材料的开发.
为了研究使用稳定包装的纳米粒子的高氧化与8个子 (HESO-8NP) 为此目的.
了解观察到的热性质背后的机制.

主要方法:

使用包装的高氧化物纳米粒子 (HESO-8 NPs) 在约50%的包装密度制造多孔固体隔热材料.
在环境空气中高温 (高达800°C) 测量导热率和散热率.
热传递机制 (固体导电,气体导电,热辐射) 和微观结构稳定性的分析.

主要成果:

在环境空气中在800°C时达到0.11 W m-1 K-1的低导热率.
在高密度HESO-8 NP颗粒中显著降低了热扩散率 (比空气低1000倍).
通过纳米收缩和HESO-8 NPs的红外吸收抑制了所有三种热传递模式.
由于高,在高温下观察到显著的微观结构稳定性,防止由于高而变粗.

结论:

高的陶纳米结构为下一代高温隔热提供了一个有希望的途径.
由于抑制热传递和高温稳定性,HESO-8 NP 具有出色的绝热性能.
这项研究为设计适用于极端环境的先进热管理材料提供了洞察力.

关键词:

高氧化物高氧化物高温的高温的高温的高温斯皮内尔氧化物氧化物热扩散性热扩散性热扩散性热绝缘热绝缘热绝缘热绝缘

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