Abstract: This invention is concerned with the production of glass-ceramic articles wherein enstatite constitutes the predominant crystal phase. Compositions exhibiting a high modulus of rupture, a use temperature in excess of 1200.degree. C., and a high fracture toughness consist essentially, expressed in terms of weight percent on the oxide basis, of about 20-35% MgO, 2-12% Al.sub.2 O.sub.3, 40-70% SiO.sub.2, and at least one metal oxide in the indicated proportions selected from the group consisting of 0-2% Li.sub.2 O, 0-4% CaO, 0-12% SrO, and 0-17% BaO, at least 0.5% Li.sub.2 O being required when present alone and at least 1% SrO and/or BaO being required in the absence of Li.sub.2 O. Compositions exhibiting a use temperature of 1500.degree. C. consist essentially, expressed in terms of weight percent on the oxide basis, of about 30-35% MgO, 53-58% SiO.sub.2, and 10-14% ZrO.sub.2.

Abstract: This invention relates to the production of highly transparent glass-ceramic articles containing about 30-50% by volume gahnite having dimensions finer than about 300 .ANG. as essentially the sole crystal phase. The articles have compositions essentially free of Li.sub.2 O, Na.sub.2 O, CaO, SrO, and BaO and consist essentially, by weight, of about 1.5-5% R.sub.2 O, consisting of 0-3% K.sub.2 O and/or 0-3% Rb.sub.2 O and/or 0-3% Cs.sub.2 O, 13-22% ZnO, 16-28% Al.sub.2 O.sub.3, 45-65% SiO.sub.2, and 1.5-8% TiO.sub.2.

Abstract: This invention relates to the production of opal glasses having a creamy-white tint which are suitable for forming culinary articles. The opacity is obtained through precipitation of fluorides, preferably NaF. The creamy-white tint results from the association of Fe.sub.2 O.sub.3 with TiO.sub.2 and/or As.sub.2 O.sub.3 and/or CeO.sub.2, with the addition of nitrates. The preferred composition of the final glass consists essentially, in weight percent, of:______________________________________ SiO.sub.2 70-73 Fe.sub.2 O.sub.3 0.1-0.25 Na.sub.2 O 10.5-13 TiO.sub.2 0.1-0.7 Fluorine 4-5.5 As.sub.2 O.sub.3 0.05-0.4 Al.sub.2 O.sub.3 6-9 CeO.sub.2 0-0.2 CaO 0.2-1.7 B.sub.2 O.sub.3 0.5-3 BaO 1-3 ______________________________________The starting composition contains NaNO.sub.3 in a proportion of 0.2-2 by weight, counted as Na.sub.2 O with regard to the glass, or an equivalent quantity of another alkali metal or alkaline earth metal nitrate.

Abstract: A composite body consisting of a glass or glass-ceramic substrate with a non-stick, heat resistant resin composition bonded to a surface thereof. Suitable substrates are those which contain one or more differentially etchable components. Particularly useful are glass compositions which undergo phase separation upon heat treatment. For example, some borosilicate glasses separate into a silica-rich phase and a borate-rich phase when heated to about 600.degree. C. and maintained at that temperature for about one hour. The substrate is etched to remove at least a portion of one component to provide a bonding surface containing extremely small pores of relatively uniform diameter for a non-stick heat resistant resin composition. The resin composition is uniformly applied to the etched substrate in liquid form and subsequently hardened, suitably by fusion, to form a solid, substantially continuous film over the etched surface.

Abstract: This invention is concerned with a method for preparing transparent laminated polarizing glass articles consisting of a support of an inorganic or organic glass, a coating exhibiting polarizing properties disposed on one of the surfaces of the support, and an optically transparent layer adhered to the coating which protects the coating from humidity. The vital feature of the method comprises a first treatment by a gamma-aminopropyltrialkoxysilane and a second treatment by an epoxyalkyltrialkoxysilane which is designed to improve the adherence of the optically transparent layer to the polarizing coating.The invention is especially useful in the fabrication of eyeglass lenses.

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: 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: 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: 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: 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 of making a sealing glass suspension composed of a sealing glass, a gelling agent and a vehicle is disclosed. The glass and gelling agent are combined and stored prior to exposure to the vehicle.

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: 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: The present invention is directed to the preparation hybrid composite bodies composed of an essentially alkali-free, alkaline earth aluminosilicate glass matrix reinforced with SiC whiskers and continuous ceramic fibers.

Abstract: A family of synthetic mica glass-ceramic compositions is disclosed based on a modified sodium fluoromontmorillonoid stoichiometry. These are spontaneously crystallizable glass-ceramics which are composed of 50-62% SiO.sub.2, 20-28% MgO, 5-15% Na.sub.2 O, and 8-13% F. The method comprises supplying excess fluoride during melting to devise a synthetic mica having sodium fluoromontmorillonoid or a solid solution on the talc axis as the dominant crystal phase.

Abstract: The instant invention is directed to the production of boards and other relatively thick-walled shapes of various configurations from inorganic silicates. The method for preparing such products involves five general steps: first a fully or predominantly crystalline body is formed containing crystals consisting essentially of a lithium and/or sodium water-swelling mica selected from the group of fluorhectorite, boron fluorphlogopite, and solid solutions therebetween; second, that body is contacted with a polar liquid, customarily water, to cause swelling and disintegration of the body accompanied with the formation of a gel; third, the gel is contacted with a source of large cations to effect an ion exchange reaction between the large cations and the Li.sup.+ and/or Na.sup.

Abstract: The instant invention is concerned with the production of essentially transparent glass/plastic composite articles. The articles consist of glass particles having water-free surfaces and dimensions of about 0.5-100 microns dispersed within a plastic matrix, the glass particles constituting up to 50% by weight of the articles and having a refractive index appropriate to or compatible with the plastic matrix.