Abstract: Halogen glass is treated, while heated above its fusion temperature, with carbon disulphide. The resulting halogen glass is essentially free of parasitic absorption bands in the infra-red spectrum. The treatment with carbon disulphide apparently lowers the hydroxyl ion content and the metal-oxygen bonds sufficiently to avoid the infra-red absorption bands.

Abstract: A semiconductor article having a phosphorous nitrogen passivating film thereon. Particularly, an insulated gate field effect transistor device operating in the inversion mode, wherein the device comprises an essentially oxygen-free, amorphous, phosphorous-nitrogen glass passivating film deposited on a III-V semiconductor material.

Abstract: Sulfide glasses capable of conducting alkali metal ions are prepared from a nonmetal glass former such as GeS.sub.2, B.sub.2 S.sub.3 and SiS.sub.2 in mixture with a glass modifier such as Na.sub.2 S or another alkali metal sulfide. A molten mixture of the constituents is rapidly quenched to below the glass transition temperature by contact with a metal mold. The rapid quench is sufficient to prevent crystallization and permit solidification as an amorphous solid mixture. An oxygen-free atmosphere is maintained over the mixture to prevent oxidation. A new glass system of (1-X) Na.sub.2 O:XB.sub.2 S.sub.3 is disclosed.

Abstract: A method of making fluoride glasses produces fluoride glass having such low OH and low oxide content that the extrinsic optical absorbance caused by the OH vibration at 2.9.mu. is eliminated or substantially reduced. In the method, a glass charge is placed in a capped crucible and dry argon gas is caused to flow through the capped crucible while the temperature is raised to melt the charge. Thereafter, while the dry argon gas flow is continued, the temperature in the furnace is held constant for a time sufficient to obtain a homogenous melt in which all crystalline materials are dissolved. The temperature is then lowered to a value between the glass crystalization temperature and the sublimation temperature of ZrF.sub.4 and then, at isothermal conditions, the flow of dry argon gas is replaced by a flow of SF.sub.6 gas or by a flow of CF.sub.4 gas. At the lowered temperature, the SF.sub.6 or CF.sub.4 gas flow is maintained for a time sufficient to eliminate or greatly reduce OH and oxides in the glass melt.

Abstract: Novel halide glass-forming compositions in the CdF.sub.2 -AlF.sub.3 -PbF.sub.2 and CdF.sub.2 -AlF.sub.3 -PbF.sub.2 -LiF composition fields are disclosed which exhibit unusual glass stability. The constituents of these glasses are potentially vapor transportable, so that very pure glass articles exhibiting excellent infrared transparency can be envisioned.

Abstract: Electrochemical devices use a vitreous material having a general formulaxAaR.sub.b --yNmRc--zN.sub.n Y.sub.pwherein A is Si, Ge, P, S, B, Nb, As, V, Cr or Mo; R is O, S or Se; N is Li, Na, K or Ag and Y is I, Br, Cl, F, ClO.sub.4, CF.sub.3, SO.sub.3, SCN or SO.sub.4 with the proviso that the material contain at least two salts NY. Such materials have increased cationic conductivity.

Abstract: The present invention teaches infrared chalcogenide glass compositions having very low dispersion in the eight to twelve micron range, which are formed as III-V-VI-VII compositions, e.g. 14% (atomic) gallium plus 25% antimony plus 40% selenium plus 21% bromine. The introduction of a group VII component into a chalcogenide glass provides low dispersion, and the group III component compensates for the strong devitrification tendencies of the group VII component and maintains the mechanical properties of the glass.

Abstract: Amorphous chalcogenide films substantially free from particulate and microstructure are formed on a substrate from solution. The solution contains a glass-forming chalcogenide compound dissolved in a non-aqueous vaporizable solvent, such as a low molecular weight amine, and is substantially free from particulate or crystallizable material. Film formation is effected by coating the solution onto the substrate in a non-vacuumized environment, and thereafter evaporating the solvent from the coating. The procedure is particularly useful in forming amorphous chalcogenide resists for photolithographic applications.

Abstract: Sulfide glasses capable of conducting alkali metal ions are prepared from a nonmetal glass former such as GeS.sub.2, B.sub.2 S.sub.3 and SiS.sub.2 in mixture with a glass modifier such as Na.sub.2 S or another alkali metal sulfide. A molten mixture of the constituents is rapidly quenched to below the glass transition temperature by contact with a metal mold. The rapid quench is sufficient to prevent crystallization and permit solidification as an amorphous solid mixture. An oxygen-free atmosphere is maintained over the mixture to prevent oxidation. A new glass system of (1-X) Na.sub.2 O:XB.sub.2 S.sub.3 is disclosed.

Abstract: An optical fiber with a graded index crystalline core (2,3) is made by filling a tube (1) with a mixture of two salts for which the one with the higher melting point has the lower refractive index. A graded composition results from partition effects when the fused salts are slowly cooled so that solidification proceeds uniformly inwardly from the tube wall. Fiber is pulled conventionally from the reesulting preform, and later is passed through a short hot zone to convert the core into single crystal form.

Abstract: Mercury thallium fluorophosphate glasses are disclosed that have very low transition temperatures, very high refractive indices and dielectric constants, and are resistant to moisture attack. The glasses are free of alkali metals and substitute thallium chloride in the glass batch as a modifier. The melted glass is largely oxide in nature, but the halogens appear to facilitate melting of these soft glasses.

Abstract: Continuous inorganic fibers consisting substantially of Si, Ti and C and optionally of O, said fibers being composed of (1) an amorphous material consisting substantially of Si, Ti and C and optionally of O, or (2) an aggregate consisting substantially of ultrafine crystalline particles of .beta.-SiC, TiC, a solid solution of .beta.-SiC and TiC and TiC.sub.1-x wherein 0<x<1 and having a particle diameter of not more than 500 A, in which amorphous SiO.sub.2 and TiO.sub.2 sometimes exist in the neighborhood of these ultrafine crystalline particles, or (3) a mixture of said amorphous material (1) and said aggregate (2) of ultrafine crystalline particles. The aforesaid continuous inorganic fibers can be produced by the following steps: a first step of preparing a semi-inorganic block copolymer comprising polycarbosilane blocks having a main chain skeleton composed mainly of carbosilane units of the formula --Si-CH.sub.

Abstract: A silver halide glass is formed from silver iodide, silver fluoride and aluminum fluoride.

Abstract: Hot pressing of fluoride glasses is provided. These glasses are synthesized from ZrF.sub.4 -BaF.sub.2 and HfF.sub.4 -BaF.sub.2 systems. Hot pressing rough blanks in a closed die made of hard, polished, optically-figured material, such as cobalt-bonded tungsten carbide, is done by pressing the glasses at a temperature between that of the softening point of the glass and its crystallization temperature and at a pressure sufficient to cause flow of the glass at the pressing temperature. As a consequence, mechanical polishing steps on all glass surfaces is eliminated, thereby minimizing surface contamination.

Abstract: An infrared ray-transmitting glass composition for optical fibers consisting essentially of 28 mol % to 38 mol % of BaF.sub.2, 2 mol % to 7 mol % of GdF.sub.3 and 58 mol % to 69 mol % of ZrF.sub.4, and optical fibers comprising said glass composition.

Abstract: A fluoride glass basically containing ingredients of a P-Si-Al-alkaline-earth metals-alkali metals-F system within specific content ranges has extremely high anomalous partial dispersion and low dispersion properties and is stable without tendency to devitrification.

Abstract: Glass for an optical fiber consists essentially of 10 to 64 mol % of at least one kind of fluoride selected from a first group consisting of CaF.sub.2, SrF.sub.2 and BaF.sub.2 ; 0.5 to 50 mol % of at least one kind of fluoride selected from a second group consisting of YF.sub.3 and fluorides of lanthanide elements; and 30 to 65 mol % of AlF.sub.3.

Abstract: Improved multicomponent fluorozirconate glasses, doped with chlorine, and a process for making them are disclosed that are continuously transmissive in the infrared spectrum.

Abstract: A cation conductive vitreous alkaline composition and a method of preparing such a composition.The composition corresponds to a formula of aP.sub.2 S.sub.5, bLi.sub.2 S, cLiX, where:X represents chlorine, bromine or iodine;c is greater than or equal to 0;the ratio b/(a+b) lies between 0.61 and 0.70; andthe ratio c/(a+b+c) is less than or equal to a limitwhich corresponds to solubility in the vitreous phase of LiX in the composition aP.sub.2 S.sub.5, bLi.sub.2 S.

Abstract: Glasses containing fluorine. These glasses are characterized by the fact that they contain at least 25% in moles, approximately, of a fluoride or a mixture of fluorides MX(X.sub.1).sub.2, in which:X and X.sub.1 each represent a fluorine atom,and M then represents a metal chosen from among the group consisting ofgallium, iron, chromium, vanadium, indium, and the rare earths,or X represents an oxygen atom,X.sub.1 represents a fluorine atom,and M then represents a titanium atom, it being understood that the said glasses contain no hydrofluoric acid as a network former and that, in the case in which M represents a gallium or indium atom, the glasses do not contain more than 15% in moles of BaPO.sub.3 F.Application notably in obtaining glasses containing various cations conferring particular optical or magneto-optical properties.

Abstract: Glass for optical fibers is made of material of a binary system containing a fluoride selected from BaF.sub.2, SrF.sub.2 CaF.sub.2 and PbF.sub.2 and another fluoride selected from AlF.sub.3 and ZrF.sub.4.

Abstract: Finely divided, small particle (0.1 micron or less) small crystallite (about 50 A.times.100 A or less) chalcogenides of manganese, rhenium and technetium are described. These compositions are prepared by mixing the absence of an aqueous solvent, a manganese, rhenium or technetium salt with a source of chalcogenide yielding a precipitate. The manganese, rhenium or technetium salt and the source of chalcogen can be mixed either neat or in the presence of a nonaqueous aprotic solvent. The precipitate which results before removal of the anion salt is a finely divided product. In the case of rhenium dichalcogenide the product possesses a layered structure. The anion salt may be removed by any technique common to the art, pumping under vacuum being one such technique, washing with a suitable solvent being another.A method is described for the preparation of di- and poly-chalcogenides of the formula MX.sub.