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Reformulation of an Aqueous Alumina Slip Based on Modification of Particle‐Size Distribution and Particle Packing
Author(s) -
Smith Peter A.,
Haber Richard A.
Publication year - 1992
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.1151-2916.1992.tb08178.x
Subject(s) - materials science , particle size , particle size distribution , viscosity , ternary operation , sphere packing , particle (ecology) , mineralogy , slip (aerodynamics) , composite material , thermodynamics , chemical engineering , chemistry , physics , geology , oceanography , computer science , engineering , programming language
Six alumina casting slips with particle‐size distributions varying from 44 to 0.1 μm were examined. Particle packing was calculated using the approach of Andreasen. Viscosity, green density, and pore‐size distribution were measured. It was found that contouring the intermediate size distribution for particles finer than 15 μm provided the most desirable viscosity for slips composed of wide size distributions. For slips containing 50 vol% solids, the lowest viscosity obtained was 196 × 10 −3 N · s/m 2 (with a two‐component size distribution), and a green density of 2.52 g/cm 3 (65% of theoretical) was achieved with a ternary system. These casts had bimodal pore‐size distributions centered around approximately 1 and 0.1μm.