Abstract: This invention is directed to a method for producing thin, transparent metal oxide films of very uniform thickness through the pyrolysis of a metal salt which comprises spraying an atomized mist of the metal salt into a fuming chamber operating at a sufficiently high temperature to vaporize the mist and then drawing the fumes out of said chamber into contact with the surface of a substrate which is at a temperature essentially equivalent to that of the fumes at the exit end of said chamber, that temperature being sufficiently high to thermally decompose said metal salt and deposit a film of metal oxide on the substrate.

Abstract: An improved method of modifying a honeycombed body having a multiplicity of open-ended cells extending therethrough between opposite face ends of the body to produce therein a multiplicity of flow paths for at least two and possibly three separate fluids. For accommodating two fluids, selected columns of cells within the honeycombed body are provided with openings near at least one face end for first fluid flow through one or two longitudinal, opposed boundary surfaces and through inner cell walls parallel to the cell axes while the open-ends of such columns on a face end perpendicular to the selected cell axes are sealed against fluid flow. Second fluid flow is through the unselected columns of cells parallel to and either in the direction of or counter to the first fluid flow. Specifically, the invention provides an improved method for sealing the selected columns of cells on face ends of the body.

Abstract: Plastically moldable ceramic batch material, which may be flowably extruded under pressure into a self-supporting article of desired shape and configuration, is passed through a flow homogenizer positioned within an extrusion cylinder upstream of an article-forming extrusion die positioned on the discharge end of the extrusion cylinder, to thoroughly homogenize such batch material during the extrusion operation and prior to being fed through the article-forming die.