热压超弹性石墨烯气凝具有双向导热特性作为热接口材料
Peng Lv1, Xiaofeng Zhou1, Songyue Chen1
1College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing 210023, China.
Materials (Basel, Switzerland)
|December 9, 2023
概括
这项研究引入了一种具有优异双向导热性的新型石墨烯薄膜,克服了传统材料的局限性. 开发的薄膜显示出作为先进的热接口材料 (TIM) 的巨大潜力.
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:
- 传统的石墨烯薄膜具有异性热导电性 (TC),限制了它们作为热接口材料 (TIM) 的使用.
- 现有的TIM经常在多个方向有效散热方面扎.
研究的目的:
- 开发一种基于石墨烯的薄膜,具有卓越的双向导热率和机械性能.
- 评估开发的薄膜作为高效热管理的先进TIM的潜力.
主要方法:
- 通过热压超弹性石墨烯气凝 (SEGA) 制备石墨烯薄膜.
- 在1800°C的温度下进行热,以增强石墨烯板的重叠和结构稳定性.
- 热传输特性 (在平面内和通过平面的TC) 和机械性能的表征.
主要成果:
- 热压制的SEGA (HPSEGA) 薄膜表现出极好的双向TC,在平面内TC达到740Wm-1K-1和通过平面TC达到42.5Wm-1K-1的厚度为101μm的薄膜.
- HPSEGA薄膜的相互连接结构确保了持续的热传输特性,即使增加厚度,减轻缺陷的影响.
- 红外热成像视觉证实了HPSEGA膜的高效传热和散热能力.
结论:
- 开发的HPSEGA薄膜为先进的双向TIM提供了一个有前途的解决方案,因为它具有卓越的导热率和机械强度.
- 独特的结构使热传输在多个方向上更有效,解决了传统石墨烯薄膜的一个主要局限性.
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