A hierarchical porous cenosphere/geopolymer composite foam (FHCs/KGP) was fabricated by the simultaneous incorporation of O₂ pore from hydrogen peroxide and cenosphere filler addition. Effects of both H₂O₂ content and high‐temperature treatment on the microstructure, porosity and strength of porous FHCs/KGP foams were investigated systematically. The obtained FHCs/KGP foams showed typical amorphous structure and desirable porosity from 65 to 82%. The composites could crystallize in situ to FHCs/leucite foams above 1000℃. Compression strength of the FHCs/leucite foams showed a maximum value of 5 ± 0.3 MPa when treated at 1000°C. The improvement of mechanical properties for the composite foams was attributed to crack deflection, fractured microspheres and the good bond between the FHCs and matrix. This study could open opportunities to employ cellular foams as alternatives in structure and filtration applications.

中文翻译：

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高温对分级多孔微孔/地聚合物复合泡沫力学性能的影响

通过同时掺入过氧化氢和添加空心球填料的O ₂孔，制造出分层的多孔空心球/地聚合物复合泡沫（FHCs / KGP）。两种H ₂ O _2的作用对多孔FHCs / KGP泡沫的微观结构，孔隙率和强度进行了含量和高温处理研究。所获得的FHC / KGP泡沫显示出典型的无定形结构和65-82％的期望的孔隙率。该复合材料可在1000℃以上原位结晶为FHC /白云石泡沫。FHC /白云石泡沫的抗压强度在1000°C下处理时显示出5±0.3 MPa的最大值。复合泡沫塑料机械性能的提高归因于裂纹变形，微球断裂以及FHC与基体之间的良好粘合。这项研究可能为在结构和过滤应用中采用多孔泡沫材料提供替代机会。