Porous fused silica ceramics prepared by gelcasting using multigrade fused silica powders

The influence of particle size distribution on rheological properties of fused silica pastes for direct ink writing

“…However, the boundaries have disappeared as the temperature has increased to 1400°C, and due to the liquid phase formation, the porosity is significantly reduced. As reported previously, when the sintering temperature increases from 1200 to 1300°C, the formation of the liquid phase helps remove the pores and accelerates the sintering of the particles, resulting in a denser sample 29 . At 1400°C, although the relative density of the FS14 has reached 96%, the fully crystallized sample will have low room temperature strength 30 .…”

“…As reported previously, when the sintering temperature increases from 1200 to 1300 • C, the formation of the liquid phase helps remove the pores and accelerates the sintering of the particles, resulting in a denser sample. 29 At 1400 • C, although the relative density of the FS14 has reached 96%, the fully crystallized sample will have low room temperature strength. 30 The microcracks of FS14 can be observed in Figure 8.…”

Visibly Transparent Multifunctional Metascreen for Tunable Infrared Coloration and Microwave Transmission

“…The permittivity of fused silica as 3.8 and tangent loss as 0.0001, which were adopted from the reference were used. [ 55 ] From both calculations, the scattering parameters. was gathered Especially in the IR range, the absorptivity as follows: α = 1 − ρ − τ = 1 − |S11| − |S21| was reduced, where α , ρ , and τ denote the absorptivity, reflectivity, and transmissivity.…”

Production of Si3N4porous beads via carbothermal reduction and nitridation technique

“…Porous oxide and non-oxide ceramics can be fabricated via various techniques such as gel casting [1][2][3][4][5], freeze-casting [6][7][8], partial sintering [9][10][11][12][13][14], foaming [15,16], 3D printing [17][18][19], replica [20][21][22][23], and using fugitive additives [9,12,[24][25][26] etc. Carbon black [27][28][29], starches [9,21,30], sawdust [31,32], and some other fugitive materials are used to provide high open porosity content and enhance achieving highly interconnected porosity.…”