We developed a simple liquid precursor method for the syntheses of porous ZrB₂/ZrC/SiC composite monoliths. Furfuryl alcohol (FA), zirconium n-butoxide, tetraethyl orthosilicate and boric acid are used as the raw materials. By combining the polymerization of FA and gelation of inorganic sols, porous hybrid monoliths are prepared by direct drying the wet gels. The inorganic and organic polymers possibly form interpenetrated network which provides the robustness for the wet gel to withstand the severe changes during dessication. When heat-treated at 1600 °C, hybrid gels are converted into porous ZrB₂/ZrC/SiC monoliths. The microstructure of the ZrB₂/ZrC/SiC monoliths can be easily tailored by controlling the synthesis conditions. The porosities of the ZrB₂/ZrC/SiC monoliths can be tuned around 74.3–81.6%, while the average pore diameters can be tuned ranging from 1.0 to 8.5 μm with pretty narrow distribution. The compressive strengths of such highly porous ceramics are in the range of 1.2–1.9 MPa.

我们开发了一种简单的液体前驱体方法，用于合成多孔ZrB ₂ / ZrC / SiC复合整料。糠醇（FA），正丁醇锆，原硅酸四乙酯和硼酸用作原料。通过将FA的聚合和无机溶胶的凝胶化相结合，可以通过直接干燥湿凝胶来制备多孔杂化整料。无机和有机聚合物可能形成互穿网络，这为湿凝胶提供了承受干燥过程中剧烈变化的坚固性。当在1600°C下进行热处理时，杂化凝胶会转变为多孔ZrB ₂ / ZrC / SiC整料。ZrB ₂的微观结构通过控制合成条件，可以轻松定制/ ZrC / SiC整料。ZrB ₂ / ZrC / SiC整料的孔隙率可在74.3–81.6％范围内调整，而平均孔径可在1.0至8.5μm范围内调整，分布范围非常狭窄。这种高度多孔的陶瓷的抗压强度在1.2-1.9 MPa的范围内。