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Production of Alumina Microparts by Powder Injection Molding
Author(s) -
Thomas Patricia,
Levenfeld Belén,
Várez Alejandro,
Cervera Alberto
Publication year - 2011
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.1744-7402.2009.02471.x
Subject(s) - materials science , molding (decorative) , sintering , composite material , paraffin wax , wax , compaction , metal injection molding , mold , injection molding machine , volume (thermodynamics) , physics , quantum mechanics
In this experimental work, injection molding of alumina using a binder system based on high‐density polyethylene and paraffin wax was performed to produce dental brackets. The use of a microinjection molding machine, permitting a careful control of the volume injected into the microcavity, allowed to produce dental brackets with complex shape and high aspect ratio. The organic component was removed by a combination of solvent and thermal debinding. After sintering at 1600°C, the final parts retained the green‐part shape, with high surface finish. The density achieved (99.8%) was higher than that for similar parts obtained by uniaxial compaction.