Patent ID: 9452548
Filing Date: 2016-09-27
CPC Classification: B05D,B28B,C23C,H01M,Y02E,Y02P

Claim Text:
1. A process for producing tubular ceramic structures which comprises: a) rotating a mandrel-spindle assembly comprising a mandrel component and a spindle component, the mandrel component being a heat shrinkable polymeric tube the external surface of which corresponds to the internal surface of the tubular ceramic structure to be produced and the internal surface of which defines a bore, the spindle component being in close fitting but slidably removable contact therewith; b) applying a ceramic-forming composition to the external surface of the mandrel component of the rotating mandrel-spindle assembly to produce a tubular ceramic structure the internal surface of which is in contact with the external surface of the mandrel component; c) removing the spindle component from the bore of the mandrel component to provide a mandrel-tubular ceramic structure assembly in which the interior surface of the tubular ceramic structure remains in contact with the external surface of the mandrel component; and, d) heat shrinking the mandrel component of the mandrel-tubular ceramic structure assembly to cause the mandrel component to undergo shrinkage to a reduced size in which the external surface of the mandrel component separates from the interior surface of the tubular ceramic structure facilitating removal of the mandrel component therefrom, wherein the ceramic-forming composition is applied to the external surface of the mandrel component by spraying.