Slurries generally consists of some heavier particles which should remain suspended in solution for best coating results. Kindly suggest best way to maintain viscosity of alumina slurries. Thank you:)
Dear Mam, I feel that the particles can be kept in suspension by : Sonification, bubbling of gas from the bottom of the containeror mechanical stirring.
You may possibly consider to somewhat increase the slurry density, along with some possibly adjustment on concentration of added deffloculant. Carefully select both deffloculant and the commercial type of alumina, as they must be suitable for slurry application. You may also want to consider some pH adjustment (perhaps acidification).
For a derivation of Brongniart’s formula ─ often used for ceramic slurries ─ and of other formulas relating slurry density with concentration, you may check my answers to another question at this forum: https://www.researchgate.net/post/Can_anyone_suggest_a_smart_way_to_calculate_volume_fraction_of_a_solid_ferrofluid_in_a_solvent_or_solids_fraction
An interesting paper on consolidation and desiccation of clay slurries
https://www.researchgate.net/publication/321844141_A_framework_for_coupled_consolidation-desiccation_behaviour_of_clay_slurries
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