Fabrication and Properties of Porous RBSN

Sol-gel holographic recording materials

“…The material consists of a glassy host containing an ethylenic unsaturated monomer ethylene glycol phenyl ether acrylate and a free radical generating titanocene photoinititiator bis( µ 5 -2,4-cyclopentadien-1-yl)-bis-[2,6-difluoro-3-1Hpyrrol-1-yl)phenyl]titanium, and was fabricated both as thick films and monoliths. The results obtained with this material implied that sol-gel materials are an important candidate for holographic data storage, and various new sol-gel photopolymerizable compositions have recently emerged [6][7][8].…”

Porous Sintered Reaction‐Bonded Silicon Nitrides with Dual‐Sized Pore Channel using Presintered Si‐Additive Mixture Granules

“…With a preferred microstructure such as a complex pore channel path and a high specific surface area provided by rod-like grain morphology, silicon nitride (Si 3 N 4 ) ceramics are excellent candidates for filtering media. [1][2][3][4][5][6][7][8][9] However, the diameter (d p ) of the pore channels in porous sintered reaction-bonded silicon nitrides (SRBSNs) is usually restricted to~1 lm for the following reasons [9][10][11][12] : (i) the nitriding mechanism involves both gas and solid phases, and (ii) grain growth is limited to 1~2 lm in diameter by the liquid phase sintering vehicle. Given that narrow pore channels produce a large pressure drop across current SRBSN filters, the widening of their pore channels to the size of those in commercial filters (d p !…”

The Characterization of Porous Sintered Reaction-Bonded Silicon Nitride Ceramics Fabricated by Si-Additive Mixture Granules

“…With preferred material properties such as complex pore channel paths and large specific surface area aided by their rod‐like grain morphology, silicon nitride (Si 3 N 4 ) ceramics make excellent candidates for filtering media 1–3 . However, the diameter (ϕ) of the pore channels in porous sintered reaction‐bonded silicon nitride ceramics (SRBSNs) is usually restricted to ∼1 μm for the following reasons: (1) the nitriding mechanism involves both gas and solid phases, and (2) grain growth is limited to 1–2 μm in the porous body by the liquid phase sintering vehicle 3–5 . As narrow pore channels produce a large pressure drop across current SRBSN filters, the widening of their pore channels to the size of those in commercial filters (ϕ≥10 μm) is strongly desired.…”