Abstract:Porous sialon ceramics was fabricated by freeze casting technique and pressureless sitering process.
Crystalline phases of the as-sintered specimens were identified by X-ray diffraction (XRD). Microstructures were examined
by scanning electron microscopy (SEM). Mechanical and dielectric properties of the material were investigated.
The crystalline phases and properties are influenced by z value in initial compositions and solids loading of the
slurries. The flexural strength and dielectric constant reach 116 MPa and 4. 79, respectively, with z = 2. 5 and solid
loading of 60vol%.