制备和相位变化储能复合材料的属性 基于改性飞
Chaoheng Li1,2,3,4, Qingchun Yu1,2,3,4, Yong Deng1,2,3,4
1Key Laboratory for Nonferrous Vacuum Metallurgy of Yunnan Province, Kunming University of Science and Technology, Kunming 650093, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
修改后的飞灰提高了相变材料的性能. 这项研究开发了一种改进飞灰的新方法.
科学领域:
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 飞灰 (FA) 是一种具有作为相变材料 (PCM) 载体潜力的废物产品.
- 目前FA的局限性包括吸附能力低和热性能差,限制了其应用.
- 修改FA对于改善其性能至关重要.
研究的目的:
- 提高飞灰的吸附能力和热性能,以作为PCM载体使用.
- 开发一种形状稳定的相变材料 (SSPCM),使用改性飞灰和Al-12Si合金.
主要方法:
- 为了增加吸附能力,采用了两种FA修饰方法.
- 性修饰显著增加了FA的Al/Si比率,特定表面积和孔积.
- 使用混合烧结方法制备SSPCM,使用改性飞灰 (MFA-OH) 和Al-12Si合金.
主要成果:
- 修改后的飞灰呈现出3D多孔结构,表面积增加 (40.86 m2/g) 和毛孔体积增加 (0.026 cm3).
- 使用65重%Al-12Si合金的SSPCM显示高潜热 (124.10J/g) 和热导率 (18.24W/m·K)).
- SSPCM表现出极好的热循环稳定性,在100个循环后保留了93.3%的潜热和94.6%的导热率.
结论:
- 性修饰有效地改善了PCM应用的飞灰特性.
- 开发的SSPCM提供了卓越的热能储能能力和稳定性.
- 这项研究为利用飞灰作为先进的相变材料载体提供了一种可行的方法.
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