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Projects 2nd Phase

Ceramic Temperature and Pressure Sensors based on Molecularly Derived SiOC Ceramics by Injection Moulding Process

Prof. Dr. Dr. h.c. Ralf Riedel
Technische Universität Darmstadt
Fachbereich 11 - Material- und Geowissenschaften

Prof. Dr.-Ing. Holger Hanselka
Technische Universität Darmstadt
System Engineering in
Machine Reliability &
Machine Acoustics

In collaboration with:

Dr. Jürgen Nuffer
Fraunhofer LBF Competence Center

The aim of the research work in the 1st project phase was the synthesis of SiOC ceramics with a naonodomain structure derived from the molecular assembly of preceramic polymers. In the 1st project phase SiOC ceramics containing boron and aluminium were created and examined in terms of their suitability as a ceramic heater and temperature sensor. It was shown that polysiloxanes and aluminium-containing filling material form mullite/SiC composites, which are considered as a highly promising starting material for ceramic components in the SiOC system with sensoric properties. A ceramic glow plug with temperature and pressure sensors will serve as a demonstration object. The 2nd project phase will proceed to optimise the manufacturing processes of SiAIOC ceramics. Endurance tests will be carried out to examine the phase stability, corrosion resistance, electrical deterioration and mechanical strength of the SiAIOC ceramics. As opposed to the 1st project phase, the pressure sensor will be incorporated into the demonstration object as a discreet component. This will mark the beginning of tests on suitable piezo materials. The rheological properties of the preceramic polymer mass including fillers are to be optimised to near-net-shape series production in thermodur injection moulding. Since the reliability of the entire system can only be ensured by conducting an integral examination, a further aim of the project is to develop the corresponding system reliability methods.

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