In order to improve of ablative resistance of resin-based thermal protection materials,the epoxy modified silicone resin was synergistically modified by boron oxide and titanium oxide.The effect of boron oxide and titanium oxide synergistic modification on the ablation resistance,mechanical property and thermal stability of the resin was studied.The results show that the addition of boron oxide and titanium oxide could significantly improve the tensile strength,density,hardness and pyrolytic residual weight of the composite,and effectively enhance the ablation resistance of the composite.Under the high temperature oxygen acetylene ablation condition,the granular and feathery porous structure formed on the surface of the composite,which significantly improved the anti-ablation performance of the composite.The minimum linear ablation rate was 0.12 mm/s.The decline was more than 75％in comparison with unmodified resin matrix.
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