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Influence of Stearic Acid Concentration on the Processing of ZrO 2 ‐Containing Feedstocks Suitable for Micropowder Injection Molding
Author(s) -
Hanemann Thomas,
Heldele Richard,
Mueller Tobias,
Hausselt Juergen
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.1744-7402.2010.02519.x
Subject(s) - stearic acid , materials science , dispersant , raw material , wax , cubic zirconia , ceramic , polyethylene , molding (decorative) , composite material , chemical engineering , organic chemistry , chemistry , dispersion (optics) , engineering , physics , optics
The influence of stearic acid concentration on the processability of polyethylene/wax‐microsized zirconia feedstocks was investigated systematically. Regarding dense and warpage‐free ceramic parts, the addition of stearic acid as a dispersant is crucial for feedstock preparation with at least 50 vol% solid loads. A stearic acid concentration of 2.2 mg/m 2 (referring to the fillers specific surface area) yields the best feedstock flow properties and homogeneity. Filling studies showed that feedstocks containing 55 vol% of submicrometer‐sized zirconia powder in a polyethylene–wax binder system with 2.2 mg/m 2 stearic acid as a dispersant can be processed by micropowder injection molding.