Abstract: There are disclosed gels composed of hydrated phyllosilicates combined with a lattice expanding agent selected from the group consisting of a primary aminocarboxy acid, lysine orotate, and glycylglycine. Both organic and inorganic additions, as well as ion exchange products, are disclosed. The gels, with or without the additions, may be polymerized and may be formed or shaped. Also disclosed are methods for generating the gels and for treating the gels generated.

Abstract: Laminated synthetic mica articles are disclosed that have particular applicability as substrates in electronic components. The articles comprise a core of stacked and consolidated, synthetic mica sheets that are impregnated with resin, and a copper foil sealed to a face on the article. Adherence of the copper foil is enhanced by use of a micaceous facing layer and bonding sheet, both being resin-impregnated and the resin cure being advanced beyond the normal B-stage level before assembly. Insulation resistance is enhanced by providing an advanced resin coating on the copper foil before assembly. Use of a bismaleimide triazine and epoxy mixed resin is also disclosed whereby a transformation temperature (Tg) of about 200.degree. C. is obtained.

Abstract: Silicon-carbide-whisker-reinforced cordierite ceramic products are prepared by uniformly incorporating the whiskers in the ceramic batch, forming the batch into a product preform, e.g. by extrusion, and firing the preform according to a process wherein the conversion of the oxide batch materials to cordierite occurs under a non-oxidizing atmosphere. Significant improvements in product strength and thermal downshock resistance are obtained.

Abstract: The invention is a flexible mask for use in charging a flowable material into selected cells of a honeycomb structure and is of particular utility in chraging a sealing material into the ends of selected cells of such a structure during fabrication of solid particulate filter bodies and other selectively plugged honeycomb structures. The mask has a central body with a set of openings extending therethrough which allow passage of the flowable material through to the selected cells and a second set of protrusions extending from one of the surfaces of the mask which are used to align the mask to the end face of the structure and which extend into and sealably cover the cells which are not to receive the flowable material. The mask may be formed from a polymer, preferably an elastomer, using any of three disclosed die apparatuses.

Abstract: ThF.sub.4 --BeF.sub.2 glasses of specified composition exhibit sufficiently low high-temperature viscosity and melt stability to be useful for the fabrication of optical devices for ultraviolet or infrared light transmission. The low melt viscosity renders the glasses suitable as host materials for rare earth and transition metal dopants so that they can be used for optical devices such as lasers and optical filters.

Abstract: This invention is concerned with the fabrication of flat panel display devices wherein a film of large crystal polysilicon is grown on a substrate. More particularly, the present invention is drawn to such devices wherein the substrate is prepared from a strontium aluminosilicate glass consisting essentially, in mole percent, of about 9-12% SrO, 9-12% Al.sub.2 O.sub.3, and 77-82% SiO.sub.2.

Abstract: This invention is directed to the fabrication of flat panel display devices wherein a film of large crystal polysilicon is grown on a substrate. More specifically, this invention is drawn to the fabrication of such devices wherein the substrate is fashioned from a phase separated glass consisting essentially of extremely fine-grained crystals homogeneously dispersed in a glass matrix, the base glass therefor being essentially free from alkali metal oxide and consisting essentially, in mole percent, of 2-6% BaO and/or SrO, 18-26% Al.sub.2 O.sub.3, and 68-80% SiO.sub.2.

Abstract: The present invention is concerned with the preparation of glass microfoams and gas-ceramics having compositions selected from the systems of SiO.sub.2 --Al.sub.2 O.sub.3 --B.sub.2 O.sub.3 --RO--R.sub.2 O, SiO.sub.2 --Al.sub.2 O.sub.3 (B.sub.2 O.sub.3)--P.sub.2 O.sub.5 --Li.sub.2 O--[ZrO.sub.2 (TiO.sub.2)], and SiO.sub.2 --P.sub.2 O.sub.5 --B.sub.2 O.sub.3 --[RO], wherein RO is selected from the group of MgO, CaO, SrO, BaO, and ZnO, and R.sub.2 O is selected from the group of alkali metal oxides. The foams comprise hydrogen-containing cells produced through the inclusion in the batch of a hydrogen-generating agent selected from the group of ammonium salts and/or a combination of amines and/or carbohydrates and/or hydrocarbons with phosphates.

Abstract: Optical fibers comprising core and/or cladding elements composed of MgO--Al.sub.2 O.sub.3 --SiO.sub.2 glasses are described wherein control of thermal expansion mismatch among the core and cladding elements is possible. Low-stress, high numerical aperture fibers as well as prestressed polarization-relating and high strength fibers are described.

Abstract: A split recoating mold for use in recoating optical waveguide fibers with a UV-curable resin is provided wherein: (1) the mold, when closed, forms a cavity for receiving the portion of the fiber which is to be recoated, the cross-sectional size and shape of the cavity being essentially equal to the cross-sectional size and shape of the original fiber; (2) the mold includes an injection port for introducing a UV-curable resin into the cavity; and (3) the mold includes means for introducing ultraviolet light into the cavity so that resin located in regions of the cavity remote from the injection port will cure prior to resin located in regions of the cavity near the injection port.

Abstract: A novel electrochemical cell including a solid electrolyte heated to an elevated temperature for operation and an integral cell electrode/heater for heating the electrolyte. Solid electrolyte embodiments are described. The integral electrode/heater is applied to a surface of the solid electrolyte and is resistively heated by an alternating electric current. A portion of the solid electrolyte may also be resistively heated. The described or comparable cells may be incorporated into an oxygen detector or similar apparatus where the apparatus is operated by alternately heating the cell and measuring the emf developed by the cell across its electrode.The invention is also, in part, a unique, solid electrolyte-integral cell electrode/heater configuration which provides a zone of uniform maximum heating at a predetermined location within the electrolyte and which, when used with a suitable resistive heating electric current, confines the current to the integral electrode/heater prolonging cell life.

Abstract: A method of manufacturing a focusing shadow mask for a color cathode ray tube is disclosed in which two conductive plates or surfaces, forming the electrode structure, are secured together by insulating material so that they do not contact each other. Strips or columns of insulating material are accurately located with respect to the matrix of apertures formed in the focus mask by etching cavities which may be in the form of grooves within at least one of the plates forming the electrode structure between adjacent aperture areas, and filling such accurately positioned cavities with a dielectric frit material, and then after firing such frit material etching away the surface of the plate so as to provide raised strips or pillars of insulator material firmly bonded and embedded in the mask structure.

Abstract: This invention is directed to the preparation of ZrO.sub.2 bodies partially stabilized through the inclusion of 0.5-10% Y.sub.2 O.sub.3 with 1-10% of a secondary stabilizer selected from the group of MgO, CaO, CuO, ZnO, and CeO.sub.2. The method comprises sintering a shaped batch at 1600.degree.-1800.degree. C., quickly cooling the sintered shape to 1000.degree.-1475.degree. C., holding said shape within that temperature range to cause precipitation of tetragonal ZrO.sub.2 as islands within cubic ZrO.sub.2 grains, and then cooling to room temperature. The final product exhibits a microstructure consisting essentially of about 50-70% cubic ZrO.sub.2, greater than 20% and up to 50% tetragonal ZrO.sub.2, and less than 10% monoclinic ZrO.sub.2.

Abstract: High surface area agglomerates of a porous oxide for the support of catalysts are provided. The agglomerates, in coarse particulate form, are incorporated into a sinterable ceramic structure as a discrete discontinuous phase. The agglomerates provide the high surface area necessary for effective catalyst support within the ceramic structure, which is sintered to provide appreciable density and strength.

Abstract: This invention is concerned with producing glasses in the As-Se-Cu field exhibiting properties rendering them eminently suitable for photoelectrodes of photoelectrochemical devices. The glasses consist essentially of compositions within the region ABCDEA of FIG. 1.

Abstract: Tetrasilicic fluormica glass-ceramic compositions particularly suited for use in the preparation of dental restorations, consisting essentially in weight percent of about 45-70% SiO.sub.2, 13-30% MgO, 5-20% K.sub.2 O, 0-2% Al.sub.2 O.sub.3, 0-7% ZrO.sub.2, 4-9% F and 1-4% BaO, and porcelain-glazed dental restorations prepared therefrom, are described.

Abstract: This invention concerns an improved method for fabricating transparent laminated polarizing glasses consisting of a substrate of inorganic or organic glass, a coating of polarizing properties deposited upon one surface of the substrate, and an integral, optically transparent composite film consisting, on the one hand, of one lamina of thermoplastic polyurethane of adhesive properties, and, on the other hand, of one lamina of thermosetting polyurethane of anti-lacerative and self-regenerating properties; the thermoplastic polyurethane ply adhering to the polarizing coating. The method comprises applying the polarizing coating to the substrate, then treating at least the coated surface of the substrate with a aqueous solution containing .gamma.-aminopropyltrimethoxysilane or .gamma.-aminopropyltriethoxysilane, and thereafter applying said composite film.

Abstract: A method for producing sodium-containing glasses, by a vapor deposition process wherein a vapor mixture containing a sodium fluoroalkoxide compound is reacted to provide a particulate sodium-containing vapor deposition product which can be sintered to a glass.

Abstract: A coupling is set forth for joining a beaded end and a plain end glass pipe together, wherein an outer clamping band retains an elastomeric sleeve therewithin and inhibits the longitudinal flow thereof by means of openings and projections formed in the outer periphery of the band, and said elastomeric sleeve is provided with varying diameters and recesses for providing unequal force distribution across the coupling while limiting the longitudinal expansion of the elastomeric sleeve.

Abstract: The invention includes a simple and inexpensive thermal controller and simple and inexpensive radio frequency alternating current generator which are provided in an improved temperature control system for a resistively heated electrochemical cell. The temperature controller is formed by a single amplifier with feedback circuit which provides the function of a combined deviation amplifier and two mode (percent proportional band and integral functions) controller. The alternating current generator uses a single direct current voltage source to generate a radio frequency alternating electric current. The two elements are combined in a temperature control circuit for a resistively heated electrochemical cell. The control circuit provides an alternating current with varying power by cyclicly shutting the current off for irregular portions of a predetermined cycle period.