In this paper, we synthesized bionic bone hierarchical porous AlN ceramics which encapsulate polyethylene glycol2000 (PEG2000) to form a new composite phase change material. Argon adsorption and SEM demonstrate that the AlN ceramic has hierarchical structure with most probable diameters of 2.4 nm and 27.3 nm. Raman spectroscopy show that no aluminum vacancies are formed inside the material, which effectively reduce the probability of phonon scattering and improve the thermal performance. EDS and XRD demonstrate that the main crystalline phase of the ceramics is AlN with a small amount of impurity peaks. The thermal conductivity of AlN ceramics with a porosity of 75.2% and 67.5% are 5.10 and 13.86 W/m·K, and that of the composite material is 17.16 W/m·K. The latent heat of melting of the composite material is 88.73 J/g and the melting point is 54.75 °C. The material breaks through the defects of slow dynamic response time and low thermal conductivity of traditional energy storage materials.

在本文中，我们合成了仿生骨分级多孔 AlN 陶瓷，其包裹了聚乙二醇 2000 (PEG2000) 以形成一种新的复合相变材料。氩气吸附和 SEM 表明 AlN 陶瓷具有分级结构，最可能的直径为 2.4 nm 和 27.3 nm。拉曼光谱表明材料内部没有形成铝空位，有效降低了声子散射的概率，提高了热性能。EDS 和 XRD 表明陶瓷的主要晶相是 AlN，具有少量杂质峰。孔隙率为75.2%和67.5%的AlN陶瓷的导热系数分别为5.10和13.86 W/m·K，复合材料的导热系数为17.16 W/m·K。复合材料的熔化潜热为88.73 J/g，熔点为54。75℃。该材料突破了传统储能材料动态响应时间慢、导热系数低的缺陷。