Novel multilayer refractories derived of cast ceramic green tapes and preceramic papers

Ruth Hammerbacher, Benjamin Dermeik, Nahum Travitzky, Friederike Lange, Andreas Roosen

Research output: Contribution to conferencePaperpeer-review

Abstract

A new approach to enhance the thermal shock and corrosion resistance of refractories is based on multilayer structures of cast ceramic green tapes, preceramic papers, or a combination thereof. In this study, tapes of different powders with particle sizes up to 1 mm and thicknesses between 0.1 and 4 mm were cast. Due to different powder fractions of Al2O3 in the individual tapes the porosity, sintering shrinkage and coefficients of thermal expansions could be varied. In order to fabricate multilayer structures different tapes are stacked and joint in the green state via lamination techniques such as thermo-compression and cold low pressure lamination. For further improvement of the properties of multilayer refractories, ceramic green tapes were laminated with preceramic papers. These papers may be high loaded with different ceramic powders (e.g. Al2O3) and fibres and therefore influence the sintering behaviour such as shrinkage, microstructure and thus properties of resulting ceramic structures. The study presents the manufacturing process of ceramic green tapes and of multilayer products including preceramic papers. Thermal and mechanical properties of the sintered structures were characterized extensively. The effect of laminate design on the properties of such multilayer refractories is discussed.

Conference

Conference14th Biennial Worldwide Congress on Unified International Technical Conference on Refractories, UNITECR 2015, in conjunction with the 58th International Colloquium on Refractories
CountryAustria
CityVienna
Period15.9.1518.9.15

ASJC Scopus subject areas

  • Metals and Alloys
  • Condensed Matter Physics
  • Ceramics and Composites
  • Materials Chemistry

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