Abstract: A process for forming a porous inorganic membrane on a porous support is provided. The support is coated with refractory particles which sinter at a first temperature. The coating then is impregnated with an inorganic binder which reacts at a second temperature, lower than the first temperature. The impregnated, coated support then is processed at a temperature at least as high as the second temperature, but less than the first temperature.

Abstract: A pumpable sealant composition comprises of (A) ethylene/propylene nonconjugated polyene terpolymer having a number average molecular weight of between about 4,000 and about 15,000; (B) ethylene/propylene copolymer having a number average molecular weight of between about 500 and about 5,000; (C) an effective amount of curative; (D) (optionally) filler; and (E) (optionally) a blowing agent; which composition possesses a Brookfield viscosity of between about 100,000 and about 5,000,000 centipoise at shear rates of 5 reciprocal seconds or greater at 22.degree. C. Also disclosed is a method of protecting a substrate employing such composition.

Abstract: A flashback inhibiting fuel fired infrared burner has a housing with a base wall, a side wall section extending outwardly from the base wall periphery, and a side opening positioned opposite the base wall. Retained in and covering the housing side opening is a foranimous burner plate structure. An air-fuel mixture supply pipe extends forwardly into the housing interior through a front end of the side wall section into a rear end portion of the housing interior and has an open outlet end. A discharge end portion of the supply pipe is received in an open front end portion of a flow reversing tube having a closed rear end. The supply pipe and flow reversing tube are laterally shrouded within the housing by an elongated baffle member having outlet openings formed in longitudinally extending front and rear wall portions thereof, the total cross-sectional area of the outlet openings in the front longitudinal wall portion being greater than that of the outlet openings in the rear longitudinal wall portion.

Abstract: A porous intermediate compact is first prepared from metal particles, carbon and a temporary binder. The compact is then heated to remove the binder and then infiltrated with the vapor of a metal having a melting point lower than the compact.

Abstract: An infrared burner with an extremely low pressure drop is described. The burner comprises a corrosion resistant mesh screen having a thick porous coating of ceramic fibers deposited thereon. In addition to a low pressure drop the burner has structural integrity and ability to generate energy at a high rate. The burner is produced by admixing ceramic fibers with a polymeric material which burns off upon heating.

Abstract: A fabric-modifier sheet for in-dryer use in provided which comprises water, an organic solvent, and an amount of an organic gelling agent effective to dimensionally stabilize the sheet, having uniformly distributed in said sheet an effective amount of one or more fabric-modifying agents.

Abstract: The fiter membrane comprises a porous structure made of a material selected from sintered ceramics, sintered metals, microporous carbon, and microporous glass, and is characterized by the fact that its entire external surface, including the inside surface of the pores in the structure, is covered with a thin and continuous film of carbon or of an oxide. In a sintered aluminum membrane, the surfaces of pores are coated with a dense and continuous thin layer of zirconia which prevents the surfaces from being degraded in service. In the figure, curve 3 shows how the throughput of a membrane without a zirconia layer falls off over time, while curve 4 shows little change in the same membrane having such a layer.

Abstract: Stable formed-in-place saccharinic gum membranes on a porous support, the membranes being modified by contact with at least an equivalent of multivalent cations to anionic groups in the gum.

Abstract: A titanium or titanium alloy composite having a porous surface layer, which comprises a titanium or titanium alloy substrate and a porous titanium or titanium alloy layer that adheres strongly to said substrate, said porous layer being formed by first providing said substrate with a firmly adhering sinter of a mixture of a titanium or titanium alloy powder and a magnesium powder, and then removing magnesium from the sinter. A process for producing a titanium or titanium alloy composite having a porous surface layer, comprising: providing a coating composition comprising a binder added to a mixture of a titanium or titanium alloy powder and a magnesium powder; applying said composition to the surface of a titanium or titanium alloy substrate; heating the substrate at a temperature of from 650.degree. to 800.degree. C. in vacuo or an inert atmosphere so as to form a sinter of the powders of titanium or titanium alloy and magnesium which firmly adheres to said substrate; and removing magnesium from said sinter.

Abstract: The invention concerns a process for hydrophobation of materials for microbacteria-retaining air filters which are preferentially used for blood transfusion and therapy by infusions. Fluorocarbons or their compounds are used for surface coating of filter materials, the contacting of which are effected either by spraying or by immersion. During these procedures, the hydrophobating agent can be in the form of either a solution, emulsion, or in pure form.

Abstract: The invention relates to a process for preparing non-porous membrane layers by applying a solution comprising a solvent and a (e.g. silicon-containing) polymer having a weight-average molecular weight of at least 300,000 Da onto a porous substrate(e.g. polypropylene) and allowing the solvent to evaporate.

Abstract: Strong and durable alpha alumina ultrafiltration membranes with effective separating layers having effective pore diameters less than about 50 nm, and particularly at almost any point within the range of about 10 to about 50 nm, can be produced by seeding boehmite sols with appropriate seeds, such as very fine alpha alumina with a specific surface area of more than 100 sq. m. per g, gelling a thin layer of the sol by contact with a microfilter support, drying the gel, followed by controlled heating of the coated support both to convert the boehmite to alpha alumina and to simultaneously control the effective pore diameter of the resultant membrane.

Abstract: An electrically insulating coating is formed on a metallic surface by applying a film of an aqueous fluoride-free composition which contains a water-dilutable synthetic resin, a dispersed waxlike substance, an inorganic or organic pigment, a borate, an alkali metal hydroxide, ammonia or an organic amine for adjusting the pH to between 7 and 9, and drying the moist film at a temperature between 120 and 350.degree. C.

Abstract: Method of making a flexible metal halide, specifically CuCl.sub.2, positive electrode for a lithium/sulfur dioxide rechargeable electrochemical cell. CuCl.sub.2 is mixed with graphite and a binder such as TFE. Methylene chloride or 1,1,2 trichlorotrifluoroethane is added to form a slurry. The slurry is pasted onto an inert, electrically-conductive, screen-like substrate. The slurry is dried and then heated to cure the TFE. The resulting electrode structure is pressed between rollers to reduce its thickness.

Abstract: An improved semiconductor processing is disclosed. In the manufacturing process, just formed semiconductor layer undergoes photo annealing and latent dangling bonds are let appear on the surface and gaps, then neutralizer is introduced to the ambience of the semiconductor. The semiconductor thus formed demonstrates SEL effect in place of Staebler-Wronski effect.

Abstract: A method of manufacturing a nickel hydroxide electrode for use in an alkaline storage cell. The disclosed method comprises a first step of forming cobalt hydroxide on surfaces of a porous nickel sintered plaque, a second step of changing the cobalt hydroxide into cobalt oxyhydroxide, and a third step of carrying out an active material filling operation for the sintering plaque formed with the cobalt oxyhydroxide.

Abstract: A process is described in which hollow spheres or hollow-sphere composites (moldings) having high-strength walls are produced. Additional layers are applied to metallized spherical lightweight particles having a core of foamed polymer. In order to increase the strength of the wall of the spherical particle and the strength of the molding, metallized lightweight spherical particles having a metal wall thickness of 5 to 20 microns are treated (coated) with a dispersion of particulate metal or metal oxide or particulate ceramic or refractory material, the lightweight spherical particles coated in a thickness from 15 to 500 microns are dried, the dried particles are heated to a temperature of about 400.degree. C. to effect a pyrolysis of the polymer core, and the particles are subsequently sintered at a temperature from 900.degree. to 1400.degree. C.

Abstract: A suitable member formed from sintered, powdered, stainless steel is contacted with a nitrate solution of a soluble alkali metal nitrate and a metal such as zirconium in a pH range and for a time sufficient to effect the formation of a membrane of zirconium oxide on the stainless steel support, the membrane preferably including an organic polymeric material such as polyacrylic acid.

Abstract: The present invention is directed to a process for the production of optionally foamed polyurethanes which are combined or fabricated with another material, comprising reacting compounds with molecular weights from 400 to 10,000 containing at least 2 isocyanate reactive hydrogen atoms with polyisocyanates in the presence of catalysts containing tertiary amino groups and combining or fabricating the resulting polyurethane with another material, characterized in that the catalysts used are diffusion resistant aminoalkanols corresponding to the general formula ##STR1## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 may be identical or different and represent hydrogen or a C.sub.1 -C.sub.6 alkyl group,R.sup.5, R.sup.6, R.sup.7 and R.sup.8 may be identical or different and represent a C.sub.1 -C.sub.6 alkyl group or together form a C.sub.2 -C.sub.6 alkylene group which may contain hetero atoms such as O or NR (R=C.sub.1 -C.sub.4 alkyl), and n and m may be identical or different and represent integers from 1 to 6.

Abstract: The invention relates to a process for the production of porous, permeable, mineral membranes.According to this process, on a porous, permeable substrate is formed a thin layer of at least one mineral compound chosen from among the simple or mixed metal oxides, except aluminum oxide and mixed aluminium oxides, simple or mixed metal hydroxides, except aluminium hydroxide and mixed aluminium hydroxides and mixtures thereof on the basis of a suspension in a liquid of colloidal or non-colloidal particles, said compound or a precursor thereof having particle sizes below 10 .mu.m. The suspension is kept in the finely divided state by the continuous application of energy to the reaction medium. The thus obtained membrane is dried and then annealed at a temperature between 400.degree. and 1100.degree. C.The use of a suspension of ultrafine colloidal or non-colloidal particles makes it possible to obviate the compression stage and obtain microporous layers with very small pore radii.

Abstract: Aluminum coated ferritic base metal foil formed by cold reduction of hot dip aluminum coated ferritic steel strip containing from 10% to about 35% chromium, up to 3% aluminum, and up to 1% silicon, the foil having a ratio of aluminum coating thickness on both sides to base metal foil thickness of at least 1:10, with at least 4% by weight total aluminum. The method of production includes heating the foil in an oxidizing atmosphere within specified temperature and time limitations to provide a porous surface having a thin layer of aluminum oxide. The foil is adapted for fabrication into monolithic support structures for catalytic converters for internal combustion engine exhaust systems.

Abstract: A method of coating a substrate with a thin film of a polymer of predetermined porosity comprises depositing the thin film on the substrate from a non-gelled solution comprising at least one hydrolyzable metal alkoxide of a polymeric network forming cation, water, an alcohol compatible with the hydrolysis and the polymerization of the metal alkoxide, and an acid or a base, prior to depositing the film, controlling the structure of the polymer for a given composition of the solution exclusive of the acid or base component and the water component, (a) by adjusting each of the water content, the pH, and the temperature to obtain the desired concentration of alkoxide, and then adjusting the time of standing of the solution prior to lowering the temperature of the solution, and (b) lowering the temperature of the solution after the time of standing to about 15 degrees C.

Abstract: A sheet material for sliding surface bearings comprises an expanded metal mesh which consists of a wrought aluminum alloy and is coated with a mixture of polytetrafluoroethylene, filler and glass fibers. The bond strength is increased by coating the surface of the expanded metal mesh with a primer layer.

Abstract: A stable tetravalent nickel oxide cathode, having a high coulombic capaci for use in high energy density batteries comprising a nickel hydroxide plate prepared by impregnating a porous conducting plaque with nickel hydroxide which is then further wet oxidized by passing a stream of ozone through the plate. The ozonation process further comprises impregnation of the nickel hydroxide plate with an alkaline solution such as an aqueous solution of potassium hydroxide and flowing of a stream of gaseous ozone through the plate by producing a pressure differential across the plate while applying water or potassium hydroxide solution to the plate to facilitate the action of the ozone on the nickel hydroxide-potassium hydroxide mixture. The tetravalent nickel oxide thus formed has the stable gamma structure with a valence approaching +4.0.

Abstract: A method in high temperature repair of damaged fuel cell screens comprising the steps of forming a mask, bathing the screen to be repaired in pure argon, masking the damage site with the mask, applying to the site selected repair material via plasma spray in several cycles each cycle interspersed with a cooling period, where a test wafer may be exposed on the surface of the mask for metering purposes.

Abstract: A process for preparing a porous ceramic thin film which comprises applying an anhydrous solution containing an organometallic compound and a multifunctional organic compound to a substrate, and thermally decomposing the compounds. The porous ceramic thin film prepared by the process has pores of not more than 10 .mu.m in pore size, and is useable as for materials of various sensors.

Abstract: A radio wave shielding material and a method of producing the same are disclosed. The radio wave shielding material comprises a plastic foamed body of three-dimensional network skeleton structure, a metal plating coat formed on the skeleton surface, and a coating of conductive rubber and/or plastic formed on the metal plating coat.

Abstract: A process for impregnating nickel or cadmium active material into a sinte nickel coated graphite fiber composite plaque electrode in which a suspension of 1-20 micron particles of active material in ethylene glycol in a 1:1 to 1:4 weight ratio of glycol to particles is gently worked into the plaque and the ethylene glycol is then evaporated off leaving the particles of active material distributed throughout the plaque. This procedure is repeated until the desired level of loading is achieved.

Abstract: There is proposed a process of continuously producing a catalyst plate, wherein a thin metal plate is formed by use of a blade with slits in the widthwise directions thereof, expanded in the longitudinal direction thereof into an expanded metal plate having formed therein meshes, the expanded metal plate thus formed is corrected in shape, degreased, thereafter, molten metal such as molen aluminum is sprayed onto the expanded metal plate to form roughened surfaces on the opposite sides of the expanded metal plate, further, a catalytic substance is deposited onto the roughened surfaces, thereafter, formed into a predetermined form, and shorn into pieces. There is proposed a pinch roll system having a tension roll, in which end portions in the widthwise direction are vertically movable so as to be used as a corrector for the expanded metal plate, and a stepping press system to be used as a former for the expanded metal plate.

Abstract: A nickel oxide electrode is made by impregnating a porous nickel substrate with a dispersion of a nickel compound, converting the compound in situ to nickel hydroxide, and removing reaction products.In order to overcome corrosion problems, facilitate removal of by-products and improve electrode performance, the dispersion is provided in a non-aqueous medium (e.g. as a methanolic solution of NiCl.sub.2.6H.sub.2 O) such that the in situ conversion gives rise to the nickel hydroxide in the form of a gel and to easily removable (e.g. volatile) reaction products. Such a conversion may be carried out by contacting the methanolic solution with an epoxy compound such as propylene oxide.

Abstract: A method for providing corrosion protection with the use of a corrosion protection product for protecting an outer covering on a metal body from corrosive undermining. The corrosion protection product is an inner protective material used in connection with a metal body having an outer surface, pores communicating with the outer surface, and a covering of outer protective material that is bonded to the outer surface and bridges over the pores. The inner protective material is a liquid medium, preferably oil, which is substantially impervious to atmospheric corrosive agents, having therein a suspension of finely divided particulate material, preferably paint pigment. The inner protective material is introduced into the pores, and any of the inner protective material that may remain on the outer surface is selectively removed, leaving bodies of the inner protective material in the pores.

Abstract: A method for the application or impregnation of a highly adherent heat-barrier layer on a metal substrate comprising effecting chemical vapor-phase deposition of zirconium dioxide as a heat-barrier layer with infiltration by finely granular zirconium dioxide in a metal felt. The vapor-phase deposition with infiltration of the metal felt can take place, in particular, from zirconium chloride, preferably within a temperature range between 550.degree. C. and 750.degree. C.

Abstract: Utilizing an organometallic precursor, a metal oxide is formed within the pores of a porous sintered blank substantially uniformly throughout the porosity of the blank producing a porous bubble pressure barrier of predetermined pore size. The barrier is integrally sintered to a face of an electrode, the median pore size of the barrier being significantly smaller than that of the electrode, producing a composite useful as an electrode in a molten carbonate fuel cell. The blank and the electrode are composed of metal.

Abstract: Utilizing an organometallic precursor, a metal oxide is formed within the pores of a porous sintered blank substantially uniformly throughout the porosity of the blank producing a porous bubble pressure barrier of predetermined pore size. The barrier is integrally sintered to a face of an electrode, the median pore size of the barrier being significantly smaller than that of the electrode, producing a composite useful as an electrode in a molten carbonate fuel cell. The blank and the electrode are composed of metal.

Abstract: A railroad tank car includes a tank body and means for applying generally uniform heat to the lower portion of the body. There are a plurality of spaced generally semicircular rings attached to the body with each pair of adjacent rings defining a heat chamber which extends laterally about the lower portion of the tank body. There are longitudinal channels having ports which open into each of the heat chambers. There is a cover for the tank which includes a longitudinally extending generally semicircular metal jacket. A layer of insulation is positioned about the jacket and a layer of plastic foam overlies and adheres to the insulation. The structure is completed by a plastic exterior coat, preferably fiberglass, which overlies and adheres to the plastic foam.

Abstract: Diaphragm coated electrodes, processes for producing these diaphragm coated electrodes, and application of the diaphragm coated electrodes in electrolytic cells used in the electrolysis of brine to produce chlorine and caustic are disclosed.

Abstract: Coating a porous electrode for electrochemical processes with an activation layer which covers the electrode surface at least in part and contains metals or compounds of metals of the platinum group by:(a) coating with a suspension containing particles of a metal of the platinum group and a dispersion agent in which the particles will dissolve at an elevated temperature,(b) heating the coated electrode to dissolve the particles,(c) heating the electrode to evaporate the agent, decompose the compound and deposit a layer of the metal of the platinum group on the electrode surface,(d) repeating the cycle to obtain a layer of desired thickness,(e) heating the electrode in an oxygen-containing atmosphere to a temperature between 400.degree. and 600.degree. C.

Abstract: A chalcogenide cathode is made by applying a slurry of a mixture containing at least one intercalatable layered transition metal chalcogenide cathode active material, a conductivity enhancing agent and a binding agent in a vehicle therefor to a high porosity current collector substrate which has been previously treated by applying and drying an adhesion promoting agent thereon and then heating the substrate in an inert atmosphere to drive off the vehicle and coalesce the binding agent.

Abstract: This invention is directed to applying thermal barrier coating systems to hardware having passageways in the walls connecting apertures in the surface to a gas supply for film cooling. An inert gas, such as argon, is discharged through the apertures during the application of the thermal barrier coating system by plasma spraying. This flow of inert gas reduces both blocking of the holes and base metal oxidation during the coating operation.

Abstract: A method for the preparation of magnetic particulate matter coated with a protective layer of chromium(III) hydroxide, oxyhydroxide or oxide, optionally crosslinked with polyacrylic acid, which process comprises a first step of depositing a hydrogel of chromium(III) hydroxide onto magnetic material in a desired particulate form, a second step of heating to form chromium(III) hydroxide, oxyhydroxide or oxide, and a third optional step, which may precede or follow the said second step, of crosslinking with polyacrylic acid. The coated protected magnetic particles are useful for the preparation of composite magnetic polymeric particles for use in processes involving ion exchange, filtration and adsorption.

Abstract: Method for fabricating a filter or catalytic reactor for hot exhaust gases, which includes a filter bed made from a frangible material such as steel wool or the like. The latter is confined and formed into a quasi-rigid body by application of an initial outer hardenable surface of a rigidizing material. Thereafter the preformed bed in an unconfined state, is treated to provide it with a uniform coating to a desired thickness in anticipation of being fitted into an appropriately shaped casing.

Abstract: A method for fabricating a homogenous and uniformily sized mixture of alkaline earth metal carbonates found to be especially useful as an emission type coating material for application to a cathodic element of a thermionic vacuum tube.

Abstract: A permeable substrate is coated with a film of silver deposited from an aqueous electroless silver plating solution. The process provides substantially total extraction or depletion of the silver from the solution. The process permits deposition of closely controlled amounts of silver on well-defined permeable areas.

Abstract: An improved method for coating a porous metal laminated structure having air flow holes on the coated side of the structure including in part, the steps of roughening an exposed surface of the porous laminated material and thereafter spraying a bond layer on the roughened surface at an angle selected to coat it with a thin bond coat layer while depositing only a limited amount of the bond coat material internally of the air flow holes and thereafter spray coating the bond coated surface with a top ceramic coat of heat resistant composition and characterized by requiring a bond coat for adherence to the porous metal laminated material and wherein the top ceramic coat spray angle is inclined opposite to that of the spray angle of deposition of the bond coat material to prevent deposition of the top coat on bond material internally of the air flow holes so as to prevent bonding of the ceramic top coat in the air flow holes thereby to minimize restriction of flow through the air flow hole in the exposed surface o

Abstract: An abradable ceramic seal coating on at least one of a pair of members having relative rotational movement, the coating being formed of stabilized zirconia which is codeposited with a thermally decomposable organic powder, the codeposited layer being heated to decompose the organic filler and produce a porous coating of from about 20 to about 33% voids.

Abstract: According to the present invention the microporous surface of a corrodible metal body is protected against corrosive agents of the atmosphere and even such severely corrosive agents as those found in marine environments, by an impregnation in the pores of an inner protective material, preferably oil, that is substantially impervious to corrosive agents, and a covering of outer protective material, preferably resin, that is intimately bonded to the outer surface of the metal and bridges over the impregnated pores. After the impregnation, any of the inner protective material such as oil that may remain on the outer surface of the metal is selectively removed, while the inner protective material in the pores is selectively retained, whereby a secure, intimate bond of the covering to the metal is assured to protect the metal from corrosion initiating from the outside, while the inner protective material remains operatively disposed in the pores to protect the covering from corrosive undermining.

Abstract: A process for catalytic heat exchange which comprises providing a ceramic coated metal heat transfer membrane having two sides, one of which is catalytic, flowing a first gas over the catalytic side of the ceramic coated metal heat transfer membrane to generate heat, and flowing a second gas or vapor over the opposite side of the membrane whereby heat is transferred from the first gas to the second gas or vapor. Apparatus for carrying out the process is also disclosed.

Abstract: Coating of woven materials so that not only the outer surfaces are coated has been a problem. Now, a solution to that problem is the following: Woven materials are coated with materials, for example with metals or with pyrolytic carbon, which materials are deposited in Chemical Vapor Deposition (CVD) reactions using a fluidized bed so that the porosity of the woven material is retained and so that the tiny filaments which make up the strands which are woven (including inner as well as outer filaments) are substantially uniformly coated.

Abstract: A process for producing a calcium chemical pump which includes reacting cium and anhydrous ammonia in a closed vessel that is cooled to a temperature below 0.degree. C. to form a solution of the calcium and anhydrous ammonia and then spraying the solution onto a rotating porous foamed substrate material in a closed container that has a vacuum pulled thereon, and the solution when sprayed causing the ammonia to flash and be evaporated and drawn off by the vacuum to cause the calcium to be deposited on the rotating porous foamed substrate material.

Abstract: Seafood pots made of wire mesh netting are prepared for galvanizing by first passing them through an incineration chamber to burn, melt and loosen foreign material thereon, and then passing them through a high pressure liquid spray to remove residual burned matter and loosened foreign material. The pots are then ready to be passed through the steps of the galvanizing process, which includes dipping the pots into heated preflux before they are dipped into molten zinc. An inverted drying chamber bridges the distance between the preflux tank and the zinc kettle, through which the seafood pots are moved by conveyor means to dry the preflux, with drying heat within the chamber being drawn from the tank and the kettle. The seafood pots are vibrated as they are withdrawn from the molten zinc to effect an even coating of zinc on the wire mesh netting thereof.