研究目的
Investigating the synthesis of silica microspheres (SMs) in silicon-modified porous carbon foams (SCFs) using high temperature oxyacetylene torch ablation.
研究成果
SMs with the diameter of several microns are in miscellaneous shapes, mainly existing in the ablation center zone. The formation mechanisms are dominated by the vapor–liquid–solid principle during the process of ablation and cooling. The effect of ablation flame on the physicochemical property of SCFs accounts for the oddly shaped SMs. The process shows the advantage of high efficiency, short run, and low cost.
研究不足
The study focuses on the synthesis and characterization of SMs in SCFs under specific ablation conditions. The scalability and application in different environments are not explored.
1：Experimental Design and Method Selection:
High temperature oxyacetylene torch ablation was employed to in situ synthesize SMs on porous SCFs.
2：Sample Selection and Data Sources:
Phenolic foams, as the precursor of carbon foams, were fabricated using water-soluble phenolic resin, hollow phenolic microspheres, and Si powder.
3：List of Experimental Equipment and Materials:
Oxyacetylene torch equipment, phenolic resin, hollow phenolic microspheres, Si powder.
4：Experimental Procedures and Operational Workflow:
Phenolic foams underwent carbonization at 1173 K, followed by graphitization at 2573 K, to transform to SCFs. The 30 s ablation treatment for SCFs was accomplished via an oxyacetylene torch flame.
5：Data Analysis Methods:
X-ray diffraction (XRD), scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS), Laser Particle Sizer.
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