A combination of talc and ammonium polyphosphate (APP) was used to fabricate the novel epoxy-based fire resistive coatings via ceramifiable strategy designed for steel substrates. The effects of individual and various combinations of fillers on the fire protection, dimensional stability and strength of coating residues fired at high temperatures were evaluated. The optimized formulation (ETA₄) exhibited much lower heat release rate, total heat release and smoke production rate, indicating good flame retardance feature. The results of fire protection test indicated that the backside temperature of steel substrate with ETA₄ coating decreased significantly (below 200 °C). After firing at 1000 °C, creamic-like foam residue was formed and it showed excellent dimensional stability and good mechanical strength. Furthermore, the possible fire resistive mechanisms of coatings at high temperatures were also proposed by performing different measurements. The decomposition products of APP-cohered talc were obtained at high temperatures, accompanied by the gradual disappearance of talc phase and generation of crystallization reaction. Finally, a ceramic-like residue was formed, leading to enhanced stability of coating residues.

滑石粉和聚磷酸铵（APP）的组合用于通过针对钢基材设计的可陶瓷化策略来制造新型的基于环氧的耐火涂料。评估了填料的单独和各种组合对防火，尺寸稳定性和高温烧成的涂料残渣强度的影响。优化的配方（ETA ₄）表现出低得多的放热速率，总放热和烟雾产生速率，表明具有良好的阻燃性。防火测试结果表明，采用ETA ₄的钢基材的背面温度涂层显着降低（低于200°C）。在1000℃下烧成后，形成乳脂状泡沫残留物，其显示出优异的尺寸稳定性和良好的机械强度。此外，还通过进行不同的测量提出了高温下涂料可能的防火机理。在高温下获得了APP附着的滑石的分解产物，伴随着滑石相的逐渐消失和结晶反应的产生。最终，形成了陶瓷状残留物，从而提高了涂料残留物的稳定性。