Premium
Pressure Filtration Model of Ceramic Nanoparticles
Author(s) -
Hirata Yoshihiro,
Tanaka Yosuke
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.02204.x
Subject(s) - suspension (topology) , filtration (mathematics) , consolidation (business) , materials science , colloid , ceramic , volume (thermodynamics) , thermodynamics , chromatography , chemical engineering , composite material , chemistry , mathematics , physics , statistics , accounting , homotopy , pure mathematics , engineering , business
The consolidation behavior of nanometer‐sized particles at 20–800 nm was examined using a pressure filtration apparatus at a constant compressive rate. The relation of applied pressure (Δ P t )–volume of dehydrated filtrate ( V f ) was compared with the established filtration theory for the well‐dispersed suspension. The theory was effective in the early stage of the filtration but deviation between the experiment and the theory started when Δ P t exceeded a critical pressure (Δ P tc ). It was found that this deviation is associated with the phase transition from a dispersed suspension to a flocculated suspension at Δ P tc . The factors affecting Δ P tc are the ζ potential, concentration, and size of the particles. Based on the colloidal phase transition, a new filtration theory was developed to explain the Δ P t – h t (height of suspension) relation for a flocculated suspension. Good agreement was shown between the developed theory and experimental results.