This work proposes the use of experimental design for optimization of microwave-assisted digestion of biomorphic ZrO 2 -ceramic. Cedar wood is used as template and it was infiltrated with ZrO 2 via sol-gel process. XPS, SEM and XRD have been used to verify the effectiveness of the synthesis. The effects of different combination of acids in the digestion of this sample have been optimized taking as response the concentration of several metallic ions measured by ICP-MS.