초록 ▼

An apparatus and method is disclosed for fabricating mats of ceramic material comprising preparing a slurry of ceramic particles in a binder/solvent, charging the slurry into a vessel, forcing the slurry from the vessel into spinneret nozzles, discharging the slurry from the nozzles into the path of

An apparatus and method is disclosed for fabricating mats of ceramic material comprising preparing a slurry of ceramic particles in a binder/solvent, charging the slurry into a vessel, forcing the slurry from the vessel into spinneret nozzles, discharging the slurry from the nozzles into the path of airjets to enhance the sinuous character of the slurry exudate and to dry it, collecting the filaments on a moving belt so that the filaments overlap each other thereby forming a mat, curing the binder therein, compressing and sintering the mat to form a sintered mat, and crushing the sintered mat to produce filament shaped fragments. A process is also disclosed for producing a tape of densely packed, bonded ceramic particles comprising forming a slurry of ceramic particles and a binder/solvent, applying the slurry to a rotating internal molding surface, applying a large centrifugal force to the slurry to compress it and force excess binder/solvent from the particles, evaporating solvent and curing the binder thereby forming layers of bonded ceramic particles and cured binder, and separating the binder layer from the layer of particles. Multilayers of ceramic particles are cast in an analogous manner on top of previously formed layers. When all of the desired layers have been cast the tape is fired to produce a sintered tape. For example, a three-layer tape is produced having outer layers of highly compressed filament shaped fragments of strontium doped lanthanum (“LSM”) particles and a center layer of yttria stabilized zicronia (“YSZ”) particles.

대표청구항 ▼

A method of forming a mat of overlying sinuous filaments having a predetermined thickness comprising: (a) blending a mixture comprising (i) finely divided solid particles, (ii) a binder operable for bonding said solid particles together, and (iii) a solvent for said binder, into an uniformly dispers

A method of forming a mat of overlying sinuous filaments having a predetermined thickness comprising: (a) blending a mixture comprising (i) finely divided solid particles, (ii) a binder operable for bonding said solid particles together, and (iii) a solvent for said binder, into an uniformly dispersed slurry; (b) transforming said slurry into a plurality of downwardly falling filaments; (c) deflecting said plurality of downwardly falling filaments with a plurality of impinging gas streams operative for deflecting and bending said filaments into a plurality of downwardly falling sinuous filaments while simultaneously removing said solvent therefrom by evaporation; and (d) collecting said plurality of sinuous filaments on a moving surface in such a manner that said plurality of sinuous filaments overlap each other a predetermined amount thereby forming a mat of overlying sinuous filaments having a predetermined thickness.