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Home » Technologies & Materials » Kiln Furniture, Refractories » Development of an Appropriate Ceramic Foam for Use as an Insulation Material in High-Temperature Applications

Development of an Appropriate Ceramic Foam for Use as an Insulation Material in High-Temperature Applications

Existing materials only partially satisfy the requirements as regards chemical resistance, resistance to heat with good insulation characteristics and low thermal mass. The approach pursued in this article involves the development of a ceramic foam for high-temperature applications in order to arrive at a compromise that satisfies the requirements described. Various foaming processes were evaluated to establish a defined spectrum of characteristics. In terms of material characteristics, flexibility and the scope for implementation on a large scale, the direct foaming process has emerged as the most promising variant. The further development of this process based on existing experience showed a high level of freedom in terms of the achievable material characteristics. With the help of various variations of raw materials, it was possible to produce materials with tailored characteristics profiles. In relation to the defined development objective, the ceramic foam based on aluminium oxide emerged as the system with the most balanced set of material characteristics. This then made it possible to produce a highly efficient insulation material for use in harsh conditions, at ambient temperatures of up to 1750 °C. The aluminium oxide foam developed by Morgan Advanced Materials Haldenwanger GmbH/DE provides
a new insulation material for challenging conditions above 1500 °C, manufactured in relevant geometries in a reliable process.


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