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Publication type: Article in scientific journal
Type of review: Peer review (publication)
Title: MoSi2/Al2O3/feldspar composites for injection‐molded ceramic heating elements
Authors: Wick-Joliat, René
Mauchle, Stéphane
Kontic, Roman
Ehrat, Sandro
Hocker, Thomas
Penner, Dirk
et. al: No
DOI: 10.1002/adem.202100517
Published in: Advanced Engineering Materials
Volume(Issue): 23
Issue: 9
Page(s): 2100517
Issue Date: Sep-2021
Publisher / Ed. Institution: Wiley
ISSN: 1438-1656
Language: English
Subjects: Binders; Ceramic injection molding; Heating element; MoSi2
Subject (DDC): 620.11: Engineering materials
660: Chemical engineering
Abstract: MoSi2 is an electrically conductive material with numerous applications mostly in high-temperature environments. Herein, the production of MoSi2-containing resistive heating elements by ceramic injection molding (CIM) is described. The sintered parts consist of MoSi2 particles embedded in a matrix of vitrified feldspar and Al2O3. The conductivity of sintered parts can be tuned precisely by varying the content of the conductive phase. For the development of the injection-molding feedstock, four binder systems are evaluated. The corresponding feedstocks are injection molded into different geometries in traditional molds as well as in additively manufactured, soluble molds. For each feedstock, a debinding and sintering routine is elaborated based on thermogravimetric measurements. Higher debinding temperature leads to more oxidation of MoSi2 and less conductive samples. Therefore, the conductivity as well as density of sintered parts is used to evaluate the applicability of the feedstocks. Finally, glow tests prove that MoSi2/Al2O3/feldspar composite parts can be used as heating elements and by combining infrared temperature measurement data with computational simulations important material data such as thermal and electrical conductivity and thermal capacity can be obtained reliably.
Fulltext version: Published version
License (according to publishing contract): CC BY 4.0: Attribution 4.0 International
Departement: School of Engineering
Organisational Unit: Institute of Computational Physics (ICP)
Institute of Materials and Process Engineering (IMPE)
Appears in collections:Publikationen School of Engineering

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