Abstract Graphite foams were prepared using foaming method and template method with nature flake graphite powder as main raw materials, sucrose as a foaming agent or binder, as well sodium chloride as a template. The compositions, microstructure, thermal properties and mechanical performance of the fabricated graphite foams were investigated by X-ray fluorescence spectrometer, scanning electron microscope, laser thermal conductivity meter, and electronic universal testing machine, respectively. The results show that water in binder played an important role in forming process of graphite foams. Graphite foams with controllable pore structure can be obtained by template method. The porosity of graphite foams increased with increasing the concentration of templating agent. With a fixed concentration of the templating agent the thermal diffusivity of the foams deceased with increasing the concentration of binder. Moreover, the obtained graphite foams has a minimum density of 288 kg/m3, a maximum porosity of 78% and a maximum thermal diffusivity of 7.14 × 10−6 m2/s. Two binding models of graphite foams prepared using template method has been proposed in the first time. This work provided an optimized processing for graphite foams with simple preparation, low-cost recyclable raw materials, and a promising thermal management material for many applications.

中文翻译：

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从天然石墨到石墨泡沫的简单途径：制备、结构和性能

摘要 以天然鳞片石墨粉为主要原料，蔗糖为发泡剂或粘合剂，氯化钠为模板剂，采用发泡法和模板法制备石墨泡沫。分别采用X射线荧光光谱仪、扫描电子显微镜、激光热导仪和电子万能试验机对制备的石墨泡沫的成分、微观结构、热性能和力学性能进行了研究。结果表明，粘结剂中的水分在石墨泡沫的形成过程中起重要作用。模板法可以获得孔隙结构可控的石墨泡沫。石墨泡沫的孔隙率随着模板剂浓度的增加而增加。在模板剂浓度固定的情况下，泡沫的热扩散率随着粘合剂浓度的增加而降低。此外，所得石墨泡沫的最小密度为 288 kg/m3，最大孔隙率为 78%，最大热扩散率为 7.14 × 10-6 m2/s。首次提出了两种模板法制备的石墨泡沫结合模型。这项工作为石墨泡沫提供了一种优化的加工方法，具有制备简单、原料成本低、可回收利用的特点，并且是一种有前途的热管理材料，可用于许多应用。首次提出了两种模板法制备的石墨泡沫结合模型。这项工作为石墨泡沫提供了一种优化的加工方法，其制备简单，原材料成本低，可回收利用，是一种有前途的热管理材料，可用于许多应用。首次提出了两种模板法制备的石墨泡沫结合模型。这项工作为石墨泡沫提供了一种优化的加工方法，具有制备简单、原料成本低、可回收利用的特点，并且是一种有前途的热管理材料，可用于许多应用。