Engineering mechanically robust ZrO₂ foams with three‐dimensional (3D) reticular architecture and high porosity is extremely challenging. In current work, we presented an approach for constructing such cellular ceramics via a combined polyurethane foaming and chemical grafting method. Ester functional groups were chemically grafted on the ZrO₂ powder surface to enhance its dispersibility. This approach caused the micron‐sized windows to assemble onto the cell wall of porous framework, contributing to 3D interconnected reticular architecture. The resulting products with such cellular architecture possessed a high porosity level of 89.2% and maintained an ultrahigh compressive strength of 8.5 MPa. Our results open up new opportunities for fabricating high‐performance ZrO₂ foams toward practical applications.

中文翻译：

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由化学改性的ZrO2粉末制备的具有3D网状结构的机械坚固的ZrO2泡沫

具有三维（3D）网状结构和高孔隙率的机械坚固的ZrO ₂泡沫的工程设计极具挑战性。在当前的工作中，我们提出了一种通过聚氨酯发泡和化学接枝相结合的方法来制造这种多孔陶瓷的方法。将酯官能团化学接枝在ZrO ₂粉末表面上，以增强其分散性。这种方法导致微米级的窗口装配到多孔框架的细胞壁上，从而促进了3D互连的网状结构。具有这种多孔结构的所得产品具有89.2％的高孔隙率水平，并保持了8.5MPa的超高抗压强度。我们的结果为制造高性能ZrO ₂开辟了新的机遇。 泡沫朝着实际应用发展。