Process for forming ceramic laminates
AssigneeLanxide Technology Company, LP
InventorClement L. Brungardt
Life of this patent
Estimating the term…
Abstract
A ceramic forming paper sheet is prepared by dispersing in water a ceramic-forming powder, a thermoplastic pulp and wood pulp, flocculating the dispersion by adding a cationic wet strength resin and an anionic polymer, dewatering the flocculated dispersion to form a sheet, and wet pressing and drying the sheet. The sheets can be stacked, and pressed or thermoformed, followed by firing to consolidate the sheets to a ceramic.
Claims7
A process for forming a shaped ceramic sheet comprising firing a ceramic-forming paper to consolidate said paper to a ceramic having essentially the same shape as the unfired body and having a porosity of greater than 20 volume percent, said ceramic-forming paper comprising a mixture of a non-fibrous, ceramic forming powder, wood pulp and at least 35% by volume of a thermoplastic fiber filler.
A process for preparing a shaped ceramic body comprising stacking a multiplicity of layers of a ceramic-forming paper to form a laminate, pressing the laminate with concurrent application of heat to form a molded object, and then firing said pressed laminate to consolidate said layers of ceramic-forming paper to a ceramic having essentially the same shape as the unfired body and having a porosity of greater than 20 volume precent, said paper comprising a mixture of a non-fibrous, ceramic-forming powder, wood pulp and at least 40% by volume of a themoplastic pulp filler.
Dependencies are inferred from the claim text.