Abstract: A method of making a printing member for providing an erasable bar-code including providing a polymeric substrate having an insert cavity; forming an insert member having a writing surface composed of a non-porous zirconia ceramic ZrO.sub.2 that is alloyed with a secondary oxide selected from the group consisting of MgO, CaO, Y.sub.2 O.sub.3, Sc.sub.2 O.sub.3, a rare earth oxide, and combinations thereof, the non-porous zirconia alloy ceramic having a density of from about 5.6 to about 6.2 g/cm.sup.3 ; and providing an erasable bar-code image on the printing member by imagewise exposing the printing surface to electromagnetic radiation that transforms the printing surface from a stoichiometric to a substoichiometric state, thereby creating a printing surface having both image areas and non-image areas.

Abstract: An amorphous upconversion phosphor comprising barium fluoride a combination of rare-earth fluorides including yttrium and lanthanum and dopants, and a waveguide thereof on a substrate selected to have a refractive index lower than a thin film of the phosphor material or any other substrate with an appropriate buffer layer of lower refractive index that the film wherein infrared radiation and visible light are converted to ultraviolet and visible light. The amorphous upconversion phosphor is deposited at temperatures low enough to permit integration into semiconductor materials.

Abstract: Tungsten carboxylate compounds useful for coating interdigitated electrodes used in hydrogen sulfide gas sensors are disclosed. A method of coating electrodes with the compounds using a precise solution casting technique such as spin-coating or casting, dip-casting or spray-casting techniques is also described. Electrodes which are solution coated with the compounds may be used to fabricate superior quality chemiresistor sensors for use in hydrogen sulfide gas sensing devices by heating the carboxylates above 350.degree. C. to decompose certain carboxylates to WO.sub.3 and others to sodium tungstate.

Abstract: An amorphous upconversion phosphor comprising barium fluoride a combination of rare-earth fluorides including yttrium and lanthanum and dopants, and a waveguide thereof on a substrate selected to have a refractive index lower than a thin film of the phosphor material or any other substrate with an appropriate buffer layer of lower refractive index that the film wherein infrared radiation and visible light are convened to ultraviolet and visible light The amorphous upconversion phosphor is deposited at temperatures low enough to permit integration into semiconductor materials.

Abstract: A highly oriented thin film of specific barium fluoride materials deposited at low temperatures are useful as Upconversion waveguides.

Abstract: The present invention concerns a method for preparing earth alkaline metal borates.The method comprises the steps of forming a mixture of an earth-alkaline metal alkoxide and a boron alkoxide, of hydrolysing this mixture to form a metal-borate precursor, and then coating the precursor onto a substrate and thermally treating it to form an inorganic film on the substrate.The method is especially useful to prepare beta barium borate layers which can serve in non-linear optical devices to produce second harmonics generation.

Abstract: A multiwavelength upconversion waveguide laser producing visible or ultraviolet wavelength radiation comprising a semiconductor laser diode producing relatively long wavelength radiation, a channel waveguide having a thin film material which converts the relatively long wavelength radiation into visible or ultraviolet wavelength radiation, and a optical resonator which recirculates the visible or ultraviolet wavelength radiation. The optical resonator may use an output optical coating or one or more Bragg grating reflectors as an output coupler. One or more optical resonators may be used to produce one or more visible or ultraviolet radiation wavelengths. One or more independently controllable lightwave modulators are used to modulate the visible or ultraviolet wavelength radiation.

Abstract: Tungsten carboxylate compounds useful for coating interdigitated electrodes used in hydrogen sulfide gas sensors are disclosed. A method of coating electrodes with the compounds using a precise solution casting technique such as spin-coating or casting, dip-casting or spray-casting techniques is also described. Electrodes which are solution coated with the compounds may be used to fabricate superior quality chemiresistor sensors for use in hydrogen sulfide gas sensing devices by heating the carboxylates above 350.degree. C. to decompose certain carboxylates to WO.sub.3 and others to sodium tungstate.

Abstract: A multilayer structure is disclosed which includes a single crystal semiconductor substrate. On the substrate is an epitaxial buffer layer, and on the buffer is an epitaxial fluoride outer layer exhibiting upconversion excitation upon red or infrared irradiation.

Abstract: An integral test element for analysis of liquids comprising: a) a spreading layer for uniformly spreading within itself at least a substance of a liquid sample applied to the element; b) a reagent layer in fluid contact with the spreading layer and permeable to a substance spreadable within the spreading layer or to a reaction product of such a substance, the reagent layer having a chemically interactive material which, in the presence of the substance or of the reaction product of the substance, produces a detectable change in the element; and c) a radiation upconversion phosphor layer or crystal for producing an upconverted radiation when excited by visible or infrared excitation radiation from an independent source.

Abstract: Disclosed is a source of visible and ultraviolet radiation that provides a focused beam for performing chemical analysis of a test element having a biological fluid deposited thereon.

Abstract: Tungsten carboxylate compounds useful for coating interdigitated electrodes used in hydrogen sulfide gas sensors are disclosed. A method of coating electrodes with the compounds using a precise solution casting technique such as spin-coating or casting, dip-casting or spray-casting techniques is also described. Electrodes which are solution coated with the compounds may be used to fabricate superior quality chemiresistor sensors for use in hydrogen sulfide gas sensing devices by heating the carboxylates above 350.degree. C. to decompose certain carboxylates to WO.sub.3 and others to sodium tungstate.

Abstract: The present invention concerns a method for preparing metal borate.The method consists in forming a metal ligand and a boron alkoxide and to react them to form a metal-borate precursor, which is then thermally treated to form an inorganic film on a substrate.The method is especially useful to prepare beta barium borate layers which can serve in non-linear optical devices to produce second harmonics generation.

Abstract: A process is disclosed of forming a film of a ternary metal fluoride in which there is combined a solvent solution, a mixture of metallo-ogranic compounds, and an organic fluoride to form a casting liquid. The casting liquid is then coated by a method such as dip coating or spin coating to form a coating on a substrate. The coated substrate is then heated to decompose the metallo-organic compounds and organic fluoride resulting in recovery of a termary metal fluoride coated substrate. The ternary metal fluorides formed are fluorides of at least one alkaine earth metal and at least one fourth period divalent transition metal having an atomic number of from 22 to 30 inclusive.

Abstract: The invention is generally accomplished by mixing non-phosphorous containing metal resinates and phosphorous resinates, forming a coating of the mixture on a substrate and heating the mixture to recover a thin film coating of metal phosphate. The metal resinates and phosphorous resinates are defined as metal-ligand compounds where the ligand is thermally separable. The preferred ligands are carboxylates, alcoholates, and acetylacetonates. The heating decomposes the metal phosphate precursor coating materials to yield a metal phosphate. The phosphorous resinate may comprise an alkyl phosphate, arylphosphate, or a carboxylate substituted alkyl or aryl phosphate. The substituting carboxylic acids may be pure, such as 2-ethylhexanoic acid, mixtures of acids, such as neodecanoic acid, and naturally occurring acids, such as rosin (abietic acid). The metal resinate may be a metal carboxylate, a carboxylate substituted alkoxide, or carboxylate substituted acetylacetonate.

Abstract: A temperature sensing device for moving surfaces such as electrostatographic fusing rollers includes an electrothermal material such as a thermistor printed on a concave shaped, thermally conductive ceramic substrate with a high temperature lubricant between the ceramic substrate and the moving surface.

Abstract: The invention is generally accomplished by mixing non-phosphorous containing metal coordination complexes and phosphorous coordination complexes, forming a coating of the mixture on a substrate and heating the mixture to recover a thin film coating of metal phosphate. The metal coordination complexes and phosphorous coordination complexes are defined as metal-ligand compounds where the ligand is thermally separable. The preferred ligands are carboxylates, alcoholates, and acetylacetonates. The heating decomposes the metal phosphate precursor coating materials to yield a metal phosphate. The phosphorous coordination complex may comprise an alkyl phosphate, arylphosphate, or a carboxylate substituted alkyl or aryl phosphate. The substituting carboxylic acids may be pure, such as 2-ethylhexanoic acid, mixtures of acids, such as neodecanoic acid, and naturally occurring acids, such as rosin (abietic acid).

Abstract: Articles are disclosed in which an electrically conductive layer on a substrate exhibits a superconducting transition temperature in excess of 30.degree. K. Conductive layers are disclosed comprised of a crystalline rare earth alkaline earth copper oxide. Processes of preparing these articles are disclosed in which a mixed metal oxide precursor composition is coated and heated to its thermal decomposition temperature to create an amorphous mixed metal oxide layer. The amorphous layer is then heated to its crystallization temperature.

Abstract: A method of forming a film of metal fluoride in which there is combined a metallo-organic compound solvent solution and an organic fluoride to form a casting liquid. The casting liquid is then coated by a method such as dip coating or spin coating to form a coating on a substrate. The coated substrate is then heated to decompose the metallo-organic compound and organic fluoride resulting in recovery of a metal fluoride coated substrate. The metal fluorides formed may be fluorides of lithium, sodium, potassium, magnesium, calcium, strontium, or barium, lanthanum, yttrium, or the oxifluoride of europium, erbium and other rare earths.

Abstract: Articles are disclosed in which an electrically conductive layer on a substrate exhibits a superconducting transistion temperature in excess of 90.degree. K. Conductive layers are disclosed comprised of a crystalline heavy pnictide mixed alkaline earth copper oxide. Processes of preparing these articles are disclosed in which a mixed oxide precursor composition is coated and heated to its thermal decomposition temperature to create an amorphous mixed metal oxide layer. The amorphous layer is then heated to its crystallization temperature.