Next Article in Journal
Hydrometallurgical Process for Tantalum Recovery from Epoxy-Coated Solid Electrolyte Tantalum Capacitors
Previous Article in Journal
Gd/Sm-Pr Co-Doped Ceria: A First Report of the Precipitation Method Effect on Flash Sintering
Article Menu

Export Article

Open AccessArticle
Materials 2019, 12(8), 1219; https://doi.org/10.3390/ma12081219

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

1
Karlsruhe Institute of Technology–KIT, Institute for Applied Materials, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
2
Department of Microsystems Engineering-IMTEK, University of Freiburg, Georges-Koehler-Allee 102, 79110 Freiburg, Germany
*
Author to whom correspondence should be addressed.
Received: 1 March 2019 / Revised: 24 March 2019 / Accepted: 25 March 2019 / Published: 14 April 2019
(This article belongs to the Section Manufacturing Processes and Systems)
  |  
PDF [4933 KB, uploaded 14 April 2019]
  |  

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. View Full-Text
Keywords: ceramic injection molding; alumina feedstock; PVB-/PEG-based binder system ceramic injection molding; alumina feedstock; PVB-/PEG-based binder system
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Medesi, A.J.; Nötzel, D.; Hanemann, T. PVB/PEG-Based Feedstocks for Injection Molding of Alumina Microreactor Components. Materials 2019, 12, 1219.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top