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

被引：12

作者：

Medesi, Anna Julia ^{[1
]}

Noetzel, Dorit ^{[2
]}

Hanemann, Thomas ^{[2
]}

机构：

[1] Karlsruhe Inst Technol, Inst Appl Mat, Hermann von Helmholtz Pl 1, D-76344 Eggenstein Leopoldshafen, Germany

[2] Univ Freiburg, Dept Microsyst Engn IMTEK, Georges Koehler Allee 102, D-79110 Freiburg, Germany

来源：

MATERIALS | 2019年 / 12卷 / 08期

关键词：

ceramic injection molding; alumina feedstock; PVB-; PEG-based binder system; POWDER; WAX; CERAMICS;

D O I：

10.3390/ma12081219

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 (mu-mixer, mu-reactor, mu-analyzer) for continuous hydrothermal synthesis (CHTS) of metal oxide nanoparticles in supercritical water (sc-H2O) as the reaction medium.

引用

页数：15