石墨烯外皮Al2O3允许高导热度相变复合材料用于热管理
Yawei You1,2, Zilong Liu2, Leyuan Wu2
1School of Semiconductors and Physics, Shanxi Key Laboratory of Graphene Sensing Materials and Devices, North University of China, Taiyuan, P. R. China.
Small (Weinheim an der Bergstrasse, Germany)
|December 29, 2025
概括
这项研究通过使用石墨烯外皮和扩展石墨来增强变相材料 (PCM). 复合材料显示了用于热管理应用的更好的导热性和稳定性.
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:
- 换相材料 (PCM) 为热管理提供高潜热,但热导率低,泄漏.
- 基于 (PA) 的PCM在高精度热控制中使用有限,原因是热性能差和可靠性问题.
研究的目的:
- 为了提高石相变材料的导热性和可靠性.
- 开发一种复合材料,用于高效的热能储存和管理.
主要方法:
- 使用石墨烯皮质微粉 (G-Al2O3) 构建了一个复合材料,作为在石墨烯矩阵中的扩展石墨骨架内的热桥.
- 采用真空浸,以创建一个合良好的,高热导电性的网络.
主要成果:
- 实现了6.1W·m-1·K-1的导热率,比纯石增加了2033%.
- 保持的高相变潜热量为210 J·g−1.1.
- 经过200个热循环后,表现出极好的稳定性,泄漏率<5%和隐性热衰减<2%.
结论:
- "接口增强"战略有效地提高了PCM的导热率和可靠性.
- 开发的复合材料适用于高功率电子设备的温度稳定和航空航天热存储.
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