Process for forming a ceramic body
AssigneeLanxide Technology Company, LP
InventorClement Linus Brungardt
Life of this patent
Estimating the term…
Abstract
A ceramic-forming prepreg tape is prepared by (a) dispersing in water a ceramic-forming powder and a fiber, (b) flocculating the dispersion by adding a cationic wet strength resin and an anionic polymer, (c) dewatering the flocculated dispersion to form a sheet, (d) wet pressing and drying the sheet, and (e) coating or impregnating the sheet with an adhesive selected from the group consisting of a polymeric ceramic precursor, and a dispersion of an organic binder and the materials used to form the sheet. The tape can be used to form laminates, which are then fired to consolidate the tapes to a ceramic.
Claims18
A process for preparing a ceramic body comprising stacking, winding or shaping drapeable, tacky, ceramic-forming prepreg tape, and firing said drapeable, tacky, ceramic-forming prepreg tape to consolidate the drapeable, tacky, ceramic-forming prepreg tape to a ceramic, said drapeable, tacky, ceramic-forming prepreg tape comprising a mixture of at least one non-fibrous, ceramic-forming powder and at least one inorganic fiber, and being coated or impregnated with an adhesive selected from the group consisting of a polymeric ceramic precursor, and a dispersion of an organic binder and the at least one non-fibrous, ceramic-forming powder used to form the drapeable, tacky, ceramic-forming prepreg tape.
A process for preparing a ceramic body comprising (1) stacking a multiplicity of layers of a drapeable, tacky, ceramic-forming prepreg tape to form a laminate, (2) pressing the laminate, and (3) firing the laminate to consolidate the multiplicity of layers of the drapeable, tacky, ceramic-forming prepreg tape to a ceramic body, said drapeable, tacky, ceramic-forming prepreg tape comprising a mixture of at least one non-fibrous, ceramic-forming powder and at least one inorganic fiber, and being coated or impregnated with an adhesive selected from the group consisting of a polymeric ceramic precursor, and a dispersion of an organic binder and the at least one non-fibrous, ceramic-forming powder used to form the drapeable, tacky, ceramic-forming prepreg tape.
A process for preparing a porous ceramic body comprising (1) stacking a multiplicity of layers of a drapeable, tacky, ceramic-forming prepreg tape to form a laminate, (2) pressing the laminate, and (3) firing the laminate to consolidate the multiplicity of layers of the drapeable, tacky, ceramic-forming prepreg tape to a porous ceramic body, said drapeable, tacky, ceramic-forming prepreg tape comprising a mixture of at least one non-fibrous, ceramic-forming powder, organic fiber, and organic filler, and being coated or impregnated with an adhesive selected from the group consisting of a polymeric ceramic precursor, and a dispersion of an organic binder and the at least one non-fibrous, ceramic-forming powder used to form the drapeable, tacky, ceramic-forming prepreg tape.
A process for preparing a ceramic body comprising shaping, winding, stacking or laminating drapeable, tacky ceramic-forming prepreg tape, and firing the drapeable, tacky, ceramic-forming prepreg tape to consolidate the drapeable, tacky, ceramic-forming prepreg tape to a ceramic body, said drapeable, tacky, ceramic-forming prepreg tape comprising a mixture of at least one non-fibrous, ceramic-forming powder and at least one organic fiber, and being coated or impregnated with adhesive selected from the group consisting of a polysiloxane, a polysilazane, a polycarbosilane, and a dispersion of organic binder and the at least one non-fibrous, ceramic-forming powder used to form the drapeable, tacky, ceramic-forming prepreg tape.
Dependencies are inferred from the claim text.