Effects of solid content on the phase assemblages, mechanical and dielectric properties of porous α-SiAlON ceramics fabricated by freeze casting

Effects of pore shape and porosity on the dielectric constant of porous β-SiAlON ceramics

“…7, and the theoretically predicted data are shown with lines. The dielectric constant value decreased with an increase porosity over the range of 27 to 71% due to the volume fraction effect, which is consistent with previously reported results [4]. However, in the whole range of porosities, the homogeneous porous ␤-SiAlON ceramics frozen at −196 • C exhibited greater dielectric constants than gradient porous ceramics frozen at 0 • C.…”

“…Porous silicon nitride-based materials or SiAlON ceramics are recognized as a promising candidate for a wide range of applications that involve high temperature and corrosive environments, such as molten-metal filtrations, sensors, catalyst supports, separation membranes, light weight structural components and radome, due to their good thermal shock resistance, high strain tolerance, high strength and corrosion resistance [1][2][3][4].…”

Fabrication and properties of porous boron nitride/silicon oxynitride ceramic composites via gas pressure sintering

“…Since porous ceramics were reported to have better thermal shock resistance [15,[18][19][20], porous BN/Si 2 N 2 O ceramic composites may exhibit a better resistance than the dense bodies. Therefore, the critical temperature difference (ΔT) of the porous BN/Si 2 N 2 O composites was expected to be increased to 1200°C or higher.…”

“…Generally, porous ceramics have better thermal shock resistance and are easier to be machined into complex shapes than the dense ceramics [18][19][20]. Although BN/Si 2 N 2 O is a proper electro-magnetic wave penetrating material, little work has been done on preparation of porous BN/Si 2 N 2 O ceramics.…”

Preparation processes and characterizations of alumina-coated alumina support layers and alumina-coated natural material-based support layers for microfiltration

“…In recent years, porous ceramic materials have received great attention [1] because of their unique properties, such as low density [2], low thermal conductivity [3,4], and low dielectric constant [5]. Among the potential applications of porous ceramic materials, porous ceramic membranes [6][7][8] are the most feasible.…”