Abstract A novel method was developed for production of carbon foam with two-level cell structure, which possesses two kinds of cell sizes of about 1 μm and 300 μm. Results show a carbothermal reduction occurs between the pore wall of first-level foam and the nano-MgO at high temperatures, which results in further bubbling and forming the second-level foam. The carbon foam prepared exhibits a characteristic of pseudoplastic deformation with a relatively compressive strength of 1.72 MPa, and possesses a low bulk density of 0.11 g/cm3 and a high porosity of 94.2%.

中文翻译：

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二级泡孔结构碳泡沫的制备及形成机理

摘要 开发了一种生产具有两级泡孔结构的碳泡沫的新方法，其具有约1 μm和300 μm两种泡孔尺寸。结果表明，在高温下一级泡沫的孔壁与纳米氧化镁之间发生碳热还原，导致进一步鼓泡并形成二级泡沫。制备的碳泡沫具有假塑性变形特性，相对抗压强度为 1.72 MPa，体积密度低，为 0.11 g/cm3，孔隙率高达 94.2%。