Abstract: An article of manufacture is provided comprising a substantially transparent high density polycrystalline yttria-base body consisting essentially of yttria and from about 6 to 14 mole percent lanthana.A method for preparing the transparent yttria doped with lanthana is also provided comprising admixing or co-precipitating lanthana or a precursor thereof with yttria or a precursor thereof, washing, drying and screening the mixture, calcining the admixed or co-precipitated powders, pressing the calcined powders into a desired shape and thereafter sintering the shaped powder for from about 1/6 to 6 hours at a temperature above the H-phase transition and for from about 1/2 to 6 hours at a temperature below the H to C phase transition, said sintering being effected at a sufficiently low oxygen atmosphere to prevent oxidative contaminants.

Abstract: A method of making a polycrystalline Mn containing ferrite body composed of crystallites which have the (111)-crystallographic planes thereof oriented substantially parallel with each other. The method involves providing a manganese compound, forming a body of a mixture made up of the manganese compound and other ferrite constituents, and heating the body made of the mixture into a polycrystalline Mn containing ferrite body of a spinel structure, wherein the manganese compound is in the form of thin platelets which have substantially parallel major surfaces oriented substantially in one direction in the body of the mixture. The ferrite body made thereby is a dense polycrystalline ferrite body having improved resistance to crumbling, improved wear characteristics and suitable physical properties for e.g. magnetic heads.

Abstract: Acid-treated and water-washed graphite particles are further treated with an aqueous solution of a phosphoric acid or a salt thereof, the expanded by heating to 20 to 70 times (in terms of bulk density ratio) the original graphite particles and the expanded particles are pressure-molded to obtain a graphite material having compressibility and recovering property and suitable for use in making those gaskets, packings, heat insulators, and cushion elements which are resistant to oxidation and serviceable at high temperatures.

Abstract: A process for forming a mineral wool, resin-bound acoustical insulating fiberboard product is described, which includes steps for mixing mineral wool fibers and powdered thermosetting binder, the introduction of the mixture into an air stream, and the directing of the entrained mixture into a mat-forming zone formed by converging upper and lower forming wires, the exhausting of air through the wires to build up layers of fiber and binder thereon and the consolidation and heating of the layers to form a fiberboard product, the amounts of air exhausted through the forming wires being adjusted so that a resin-enriched layer of predominantly fine fibers is initially deposited on the upper forming wire. A preferred embodiment is disclosed wherein an open mesh glass fabric is positioned between the lower forming wire and the layer of fibers and resins being formed thereover, said fabric acting as a carrier for the board-forming mat.

Abstract: The fibrillated surface layer of an unsintered extruded mass of a polytetrafluoroethylene is broken by mechanical or electrical force to facilitate evaporation of the lubricant whereby a molded article which is free from defects such as cracks and blisters is obtained upon sintering.

Abstract: In a method of manufacturing garments, a mold is provided in the shape and size of the desired garment. The mold includes a matrix of conductors by which variable predetermined electrostatic fields can be established over the mold. A plurality of fiber layers are electrostatically deposited onto the mold to form a garment wherein at least some of the fibers comprising preselected layers are oriented according to the elasticity requirements of particular areas of the garment. Preferably, the garment is then at least partially precured, after which a plurality of colorants can be applied in sequence electrostatically to the garment to produce predetermined patterns, if desired. The garment is then cured to set the fiber layers and colorants, after which the garment is removed from the mold for subsequent finishing.

Abstract: Sheets of garneted polyester are separated into a plurality of small pieces and each of the small pieces is generally formed into a rounded body suitable for blow injecting into an insulation receiving pocket formed in goods such as coats, sleeping bags and the like, in accordance with the method and apparatus provided. The rounded bodies formed may generally be used similarly to and as a substitute for natural down insulation. The rounded bodies formed are approximately uniform in size and weight, and the size of each of the bodies is sufficiently small to avoid clogging of the blow injecting tubes and paths of the apparatus utilized in filling the goods with insulation. Each of the rounded bodies include a plurality of randomly oriented polyester fibers therein, and each of the rounded bodies provides a substantial resiliency to permanent deformation after the application of force to them.

Abstract: The method of making a medical glove adapted to tightly conform to a wearer's skin and to be donned without the use of additional lubricants comprises the steps of applying a first layer of elastomeric material onto a glove form having the general contour of a human hand; applying a second layer over the first layer; the second layer being a particulate suspension comprising an elastomeric material having particulate matter randomly distributed therethrough; the particulate matter having a size greater than the thickness of the second layer of elastomeric material; curing the layers so that the first and second layers are permanently bonded together and the particulate matter is securely embedded within the second layer with portions thereof extending outwardly beyond the surface of the elastomeric material; removing the glove from the form; and reversing the glove to position the particulate matter on the inner, skin-contacting surface thereof.

Abstract: Finely ground polytetrafluoroethylene molding powder with or without a filler is subjected to high speed agitation in the presence of a medium consisting essentially of water and a hydrophobic organic liquid at a ratio of 0.5 to 1 liter per 1 Kg of the resin to agglomerate it. Hydrophobic organic liquids mean organic liquid which dissolve less than 15 wt. % in water at the temperature of agglomeration.The volumetric ratio of the organic liquid to water is in a range of 2 to 1/2.The agglomerated product having narrow particle size distribution and high bulk density and free flowing property can be obtained by the agitation for short time.

Abstract: A method of disposing of silica dust precipitated from metallurgical furnaces producing products high in silicon content by making mechanically strong metal oxide pellets with the silica dust as a binder is disclosed.

Abstract: A method is described for making a shaped silicon carbide-silicon matrix composite. A confined carbon fiber preform is infiltrated with sufficient molten silicon metal at a temperature in the range of from about 1400.degree. C. to about 1800.degree. C. in an inert atmosphere or vacuum.

Abstract: The invention concerns a method of manufacturing plastic - bonded (LnCo) magnets (Ln = lanthanoid = elements 57 - 71 + yttrium), pulverization of the (LnCo) material being followed by alignment of the magnetic powder by a magnetic field, a compression process and curing of the added plastic.

Abstract: A continuous in-line method for forming an airlaid fibrous fluff web adjacent the uppermost and lowermost surfaces of a substantially planar internal reinforcing ply having substantially the same width as said fibrous web, said ply being substantially impervious to the passage of fibers from one surface thereof to the other, in a continuous fiber deposition zone is disclosed. In a preferred embodiment, a unique ply folding board is employed to permit continuous formation of an airfelt web having a reinforcing ply comprised of wet strength tissue paper located approximately mid-way between its uppermost and lowermost surfaces. Two adjacent vacuum chambers are preferably employed in the continuous forming zone to compensate for the increased airflow restriction encountered when forming the uppermost fibrous web portion over the reinforcing ply and the lowermost fibrous web position.

Abstract: A method is disclosed for preparing a dense, B"-alumina-containing ceramic body exhibiting an electrical resistivity for sodium ion conduction at 300.degree. C. between about 3 and about 20 ohm-cm, by sintering a green ceramic body formed from a composition comprising at least about 90 weight percent of aluminum oxide, about 8.7 to 9.4 weight percent of sodium oxide, about 0.7-0.9 weight percent of lithium oxide, and from 0.0 to about 4.0 weight percent of magnesium oxide at a temperature between about 1400.degree. C. and about 1600.degree. C., for between about three (3) minutes and about 180 minutes to obtain a body containing both B and B"-alumina crystalline forms. The sintered body exhibits a density greater than 90% of theoretical for polycrystalline B"-alumina and a uniform grain size between about 20 and 100 micrometers. All of these compositions were prepared by using either a binary liquid forming mixture between sodium aluminate (NaAlO.sub.2) and lithium aluminate (LiAlO.sub.

Abstract: The invention relates to a method of preparing beta alkaline alumina parts particularly for use as solid electrolytes in electric cells of the sodium-sulphur type. It consists in mixing alumina and an alkaline carbonate in predetermined quantities, heating the mixture, crushing after cooling, forming the parts, sintering them and, after said forming, but prior to sintering depositing a layer of a compound of said alkaline metal on the surface of the parts in contact with the atmosphere to create an atmosphere rich in sodium in the immediate vicinity of the parts during sintering for compensating any loss of the element which may occur from the parts and minimizing the loss of alkaline metal by diffusion towards the outside of the parts.

Abstract: The invention relates to a method for producing ceramic tiles with ornamental shapes from clay emerging from an extrusion press. Shaped punching tools are disposed on either side of the clay column from which the tiles are to be formed, and are moved on a carriage in the direction of the moving column at a speed corresponding to the speed of the moving column. Supports hold the clay while it is being punched. A drive system such as a fluid actuated drive system moves the punching tools, and the drive system is selectively actuated in response to movement of the carriage. Cutting wires sever each column section acted upon by the punching tools from the rest of the column.

Abstract: An improved process for the production of granules, comprising application of a granulating liquid to a pulverulent substance being subjected to a rotating movement in such an amount that the point of equilibrium between the moisture content of the substance and that of the air is exceeded, and subsequently drying this moist substance until its moisture content falls to or below this point of equilibrium.

Abstract: Fluorspar is formed into briquettes by thoroughly mixing fluorspar ore with water and an agglomerating agent, for example sodium carbonate, pressing the mixture and calcining the pressed product.

Abstract: Pellets having uniform size and excellent strength properties are manufactured without fluctuations in production from finely-divided moist material by rolling nuclei of substantially mutually identical size in at least one pellet-rolling circuit in the presence of the finely-divided moist material, to form pellets having at least one layer of said material surrounding respective nuclei.

Abstract: A sintered silicon nitride body consists of not more than 10% by weight in total of at least two metal oxides selected from the group consisting of beryllium oxide, magnesium oxide and strontium oxide (provided that each of the metal oxides is not more than 5% by weight) and the remainder of silicon nitride and may further contain not more than 10% by weight of at least one rare earth metal oxide, and is produced by preparing a mixture having the said composition range and then molding and sintering it at 1,600.degree.-1,900.degree. C in nitrogen or inert gas atmosphere.