通过h-BN/Al2O3混合复合材料实现协同双模式冷却,以实现高效的热管理
Yubeen Oh1, Jeehoon Yu1, Hyungu Im2
1Department of Advanced Materials Engineering, Chung-Ang University, Anseong 17546, Republic of Korea.
ACS applied materials & interfaces
|October 1, 2025
概括
这项研究引入了一种用于被动辐射冷却的新型混合复合材料板. 该材料达到显著的环境下温度,为各种应用提供了热管理的突破.
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:
- 有效的热管理对于能源效率和设备寿命至关重要.
- 被动辐射冷却材料提供了一个可持续的解决方案,以减少冷却的能源消耗.
- 现有材料在宽带太阳反射率和导热性方面经常面临局限性.
研究的目的:
- 开发一种高性能,毫米厚的,独立的混合复合材料板,以提高热管理和能源效率.
- 集成微尺度六角化 (h-BN) 血小板和纳米尺度的 (Al2O3) 纳米粒子在一个环氧基质.
- 为了实现宽带太阳反射和高中红外辐射,以实现有效的被动冷却.
主要方法:
- 在环氧基质中使用h-BN血小板和Al2O3纳米粒子制造混合复合材料板.
- 光学属性的表征,包括太阳反射率 (UV-vis,NIR) 和中红外发射率.
- 测量平面外导热率的测量.
- 净冷却功率的理论模拟.
- 复合材料板的实地测试,以测试下环境温度下降和每日冷却性能.
主要成果:
- 复合材料板在紫外线下显示80%的平均反射率,在NIR中显示92%的平均反射率.
- 实现了85%的中红外发射.
- 证明了出色的6.72 W m-1 K-1的平面外导热率.
- 理论模拟预测净冷却功率高达141W m-2.
- 实地测试显示,高峰次环境温度下降为-12.4°C,平均下降为-10.2°C.
结论:
- 开发的混合复合板在被动辐射冷却方面取得了重大进展.
- 该材料表现出卓越的热管理能力,使大批量冷却能够超越表面效应.
- 潜在的应用包括建筑物,固定电子设备和移动平台,如无人机.
- 电绝缘,耐腐蚀性质进一步提高了其适用于各种应用的适用性.
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