Kernforschungsanlage Julich Gesellschaft MIT Beschrankter Haftung

Rosenthal Technik Ag

Hans J Pohlmann

Axel Krauth

Horst R Maier

Siegfried Forster

Johann Siebels

Hartmut Keller

Horst Nink

Horst Reddig

The invention relates to a recuperative heat exchanger comprising an elongate rotationally symmetric body of ceramic material having radially outwardly extending, flow channels of slot like cross-section extending along the axis of the body. Alternate flow channels extend further toward the surface of the body and further toward the axis of the body, respectively. Inlet and outlet openings are provided for the flow channels about at the ends of the body. The invention also comprises a process for making such a heat exchanger, including extruding ceramic material through an extrusion nozzle with a free cross-section in which core bodies are shaped and positioned for generating the flow channels and inner and outer cover walls defining the flow channels. The invention further comprises the extrusion nozzle in which the process is performed.

Recuperative heat exchanger of ceramic material

Refractory products such as foundry articles and composite metal-ceramic articles are prepared from a sepiolite (2 MgO.3SiO.sub.2.2H.sub.2 O) and silicate containing aluminum titanate.

Refractory articles and composite metal-ceramic articles (cermets)

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Munich, Georgia

Hans J Pohlmann