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PVB/PEG-Based Feedstocks for Injection Molding of Alumina Microreactor Components

Medesi, Anna Julia; Nötzel, Dorit; Hanemann, Thomas

Abstract:
The ceramic injection molding (CIM) process is a cost-effective powder-based near net shape manufacturing process for large-scale production of complex-shaped ceramic functional components. This paper presents the rheological analysis of environmentally friendly CIM feedstock formulations based on the binder components polyvinyl butyral (PVB) and polyethylene gycol (PEG). The prepared PVB/PEG-based alumina molding compounds were investigated with respect to their PVB:PEG ratios as well as to their powder filling degrees in the range between 50 and 64 vol.%. Corresponding viscosities and shear stresses were determined for increasing shear rates to show the effects of increased PEG content and solid loadings on them. Two single reactor components were injection molded and subsequently joined in their green state for fabrication of an alumina microreactor. The intended purpose of the alumina microreactors is their potential application as wear-resistant and hydrothermal stable multifunctional devices (µ-mixer, µ-reactor, µ-analyzer) for continuous hydrothermal synthesis (CHTS) of metal oxide nanoparticles in supercritical water (sc-H2O) as the reaction medium.

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Verlagsausgabe §
DOI: 10.5445/IR/1000093959
Veröffentlicht am 25.04.2019
Originalveröffentlichung
DOI: 10.3390/ma12081219
Coverbild
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien - Werkstoffkunde (IAM-WK)
Publikationstyp Zeitschriftenaufsatz
Jahr 2019
Sprache Englisch
Identifikator ISSN: 1996-1944
KITopen-ID: 1000093959
HGF-Programm 43.22.03 (POF III, LK 01)
Erschienen in Materials
Band 12
Heft 8
Seiten Article: 1219
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 14.04.2019
Schlagworte ceramic injection molding; alumina feedstock; PVB-/PEG-based binder system
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