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AssigneeQsil GmbH Quarzschmelze Ilmenau
InventorsFrank Peter Ludwig, Lars Ortmann, Janis Wehner, Ralph Heubach
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A method for producing a round tube from a ceramic material or a glass-ceramic material or mixtures thereof is described. The method comprises introducing a silicate-ceramic, oxide-ceramic and/or non-oxide-ceramic material-forming agent into a melting vessel, which has along a longitudinal axis a tubular wall which defines a tubular cavity, wherein the melting vessel rotates about its longitudinal axis. A uniform layer of the ceramic and/or glass-ceramic material-forming agents is thereby formed, lying on the inner side of the wall, by means of centrifugal forces generated by rotation and is heated by means of a heat source arranged in the inner cavity of the melting vessel until at least the inner side of the layer of material-forming agents has melted. Such tubes can be used for various industrial purposes.
-11. (canceled)
A method for manufacturing a hollow cylinder from a ceramic material or a glass-ceramic material or mixtures thereof, comprising:
A hollow cylinder made by introducing at least one of a silicate-ceramic, oxide-ceramic, and non-oxide-ceramic base material having a grain size of 0.5 μm to 2 mm into a melting crucible which has a tube-shaped wall that defines a tube-shaped hollow space;
A hollow cylinder having an interior face and an exterior face, the interior face defining an interior hollow space, the hollow cylinder comprised of at least one of a silicate-ceramic, oxide-ceramic, and non-oxide-ceramic base material having a grain size of 0.5 μm to 2 mm, the interior face of the hollow cylinder being fused, but the exterior face is not fused.
Dependencies are inferred from the claim text.