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Permeability Enhancement in Porous‐Sintered Reaction‐Bonded Silicon Nitrides
Author(s) -
Park YoungJo,
Kim HaiDoo,
Halloran John W.
Publication year - 2010
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2010.02511.x
Subject(s) - materials science , porosity , sintering , permeability (electromagnetism) , silicon nitride , composite material , pressure drop , porous silicon , silicon , metallurgy , membrane , genetics , physics , biology , thermodynamics
Pressure drop across filter materials is critical for the effective performance of various kinds of filtering system. To evaluate the feasibility of lowering the pressure drop of porous sintered reaction‐bonded silicon nitrides, permeability tests were conducted for specimens with different porosity and pore structure. The results showed that pore former size is a minor factor, while permeability (κ) had a strong dependency on the amount of pore former. Prolonged sintering time (2 h vs 10 h at 1700°C) increased the permeability by increasing the effective pore diameter, which compensates for the observed decrease in total porosity.