Porous Silicon Carbide Ceramics: Diverse Applications from High-Temperature Filtration to Biomedical Materials
Silicon carbide ceramics possess outstanding characteristics such as low thermal expansion coefficient, high thermal-conductivity, good chemical stability, also excellent wear resistance. They are highly promising structural ceramics. When they are endowed with precisely controllable porous structures, the materials retain their original excellent properties while acquiring new functions such as high specific surface area and controllable permeability. As a result, their application fields have been significantly expanded. I. Properties of Porous SiC Ceramics 1. Porosity Properties ① Porosity Porosity refers to the percentage of the volume occupied by pores in a porous material relative to the total volume of the material (including three types of pores: open pores, semi-open pores, and closed pores). Research has shown that the performance of porous materials mainly depends on the porosity. ② Pore morphology Pore morphology refers to the shape of the pores in a porous cer...