Patent classifications
C04B38/0087
Crosslinked starches for pore forming in ceramics
Disclosed herein are green bodies comprising at least one ceramic-forming powder; at least one binder; and at least one cross-linked starch present in an amount of at least about 20% by weight as a super addition. Further disclosed herein is a method of making a porous ceramic body comprising mixing at least one ceramic-forming powder, at least one solvent such as water, at least one binder, and at least one cross-linked starch present in an amount of about 20% by weight as a super addition to form a batch composition; extruding the batch composition to form a green body; drying the green body; and firing the green body to form a porous ceramic body. Also disclosed herein are methods of screening a green body for making a porous ceramic body.
Formation of voids within components formed from porous substrates
A method of creating a component comprises forming a substrate and depositing a template material within the substrate, such that there are a plurality of template member. The component is heated to a temperature above a melting point of the template material, such that the template material wicks into a porosity of the substrate and forms a component with voids. An average hydraulic diameter of the voids is less than 1 millimeter.
FORMATION OF VOIDS WITHIN COMPONENTS FORMED FROM POROUS SUBSTRATES
A method of creating a component comprises forming a substrate and depositing a template material within the substrate, such that there are a plurality of template member. The component is heated to a temperature above a melting point of the template material, such that the template material wicks into a porosity of the substrate and forms a component with voids. An average hydraulic diameter of the voids is less than 1 millimeter.
Polycrystalline porous Al2O3—bodies on the basis of molten aluminum oxide comprising an increased toughness and use thereof
The present invention relates to temperature-treated polycrystalline porous Al.sub.2O.sub.3 bodies comprising an amount of aluminum oxide of more than 97% by weight, an amount of other oxide alloying components of a total of less than 3% by weight, a macroporosity of between 5 and 30% by volume, wherein the Al.sub.2O.sub.3 bodies are composed of a plurality of Al.sub.2O.sub.3 primary crystals comprising a crystallite size of between 20 and 100 m.
Polycrystalline porous Al2O3—bodies on the basis of molten aluminum oxide comprising an increased toughness and use thereof
The present invention relates to temperature-treated polycrystalline porous Al.sub.2O.sub.3 bodies comprising an amount of aluminum oxide of more than 97% by weight, an amount of other oxide alloying components of a total of less than 3% by weight, a macroporosity of between 5 and 30% by volume, wherein the Al.sub.2O.sub.3 bodies are composed of a plurality of Al.sub.2O.sub.3 primary crystals comprising a crystallite size of between 20 and 100 m.
Formation of voids within components formed from porous substrates
A method of creating a component comprises forming a substrate and depositing a template material within the substrate, such that there are a plurality of template member. The component is heated to a temperature above a melting point of the template material, such that the template material wicks into a porosity of the substrate and forms a component with voids. An average hydraulic diameter of the voids is less than 1 millimeter. A component formed by the method, and the component itself are also disclosed.