Abstract: An electroluminescence material comprising one or more polymers which comprise structural units of the formula (I), ##STR1## where the symbols and indices have the following meanings: Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, Ar.sup.5, Ar.sup.6 are identical or different, monocyclic and/or polycyclic aryl and/or heteroaryl groups which may be linked via one or more bridges and/or be condensed and may be unsubstituted or substituted, where Ar.sup.1, Ar.sup.3, Ar.sup.5 and Ar.sup.6 are each divalent and Ar.sup.2 and Ar.sup.4 are each monovalent;R.sup.1 is H, a hydrocarbon radical having from 1 to 22 carbon atoms, which may be unsubstituted or substituted, preferably by F, and can also contain heteroatoms, preferably 0, or Ar.sup.7, where Ar.sup.7 is, independently of Ar.sup.1-6, as defined for Ar.sup.1-6 ;n is 0, 1 or 2.The electroluminescence material of the invention has, inter alia, a low threshold voltage of the electroluminescence and a high efficiency, although the polymers are not conjugated.

Abstract: A method for identifying a surface in which a plurality of trace material is used to establish a database in which a unique combination of trace materials is assigned to a unique source. A composition is formulated containing the unique combination together with an indicator material and a solvent system, the solvent system including a solvent which is volatile under conditions of application. This composition is applied to a surface and the solvent permitted to evaporate, after which the composition is detected on the basis of the indicator material and each of the plurality of trace materials is identified. The unique source can then be determined from the database.

Abstract: An anisotropic hexagonal barium ferrite sintered magnet is prepared by molding a powder barium ferrite raw material in a magnetic field into a compact and sintering the compact; or by molding a powder barium ferrite raw material in a magnetic field into a compact, disintegrating the compact into particles, compacting the particles in a magnetic field into a second compact, and sintering the second compact. In either case, the raw material contains calcined hexagonal barium ferrite, a silicon component, and a barium component. The resulting anisotropic hexagonal barium ferrite sintered magnet has improved sintered density and coercivity while the method minimizes deformation during sintering which is otherwise caused by the difference between the shrinkage factors in axis c and a directions, and simplifies or omits post-treatment like polishing.

Abstract: Multimetal oxides containing Mo, V and at least one of the elements W, Nb, Ti, Zr, Hf, Ta, Cr, Si and Ge and having a special three-dimensional atomic arrangement are used in catalysts for the catalytic gas-phase oxidation of organic compounds.

Abstract: A low-velocity electron excited phosphor having a composition represented by a general formula ZnO.multidot.(Al.sub.x, Ga.sub.1-x).sub.2 O.sub.3 :Mn, wherein X=0.001 to 0.3 mol. A content of Al in the phosphor is set be to within a range between 0.001 mol and 0.3 mol. The range permits a variation in luminance of the phosphor to be within .+-.30% and initial luminance of the phosphor to be significantly increased, resulting in the phosphor being suitable for use for a fluorescent display device.

Abstract: A magnetorheological fluid comprises non-colloidal magnetic particles, an abrasive, water, glycerol, and an alkaline buffer. The abrasive may be CeO.sub.2, the non-colloidal magnetic particles may be carbonyl iron, and the alkaline buffer may be Na.sub.2 CO.sub.3. The fluid is useful for magnetorheological finishing.

Abstract: A piezoelectric ceramic composition consists essentially of a composite oxide with perovskite structure comprising Pb, Zr and Ti, and contains, as the side component, at least one of Mn and Cr, and further contains Cu. Preferably, the composition still further contains W, more preferably at W/Cu.gtoreq.1.1. Even more preferably, the composition has an excess Pb content larger than the stoichiometric amount of Pb in site A of the composite oxide when represented by the general formula, ABO.sub.3. The composition can be sintered at low temperatures and has good piezoelectric characteristics, for example, a high electromechanical coupling factor.

Abstract: The oxyhalide rare earth doped laser glass of the present invention comprises the substitution of fluorine for oxygen in glasses having the general molar batch composition of 50% SiO.sub.2, 25% CaO, 25% Al.sub.2 O.sub.3 to improve the distribution of rare earth dopants in the glass. The general molar batch composition of the invention ranges from approximately 45-70% SiO.sub.2, 15-35% CaO, 10-25% Al.sub.2 O.sub.3, 4-15% Al.sub.2 F.sub.6, and 0.001-2% Er.sub.2 O.sub.3. This substitution of fluorine into the 2SiO.sub.2. Al.sub.2 O.sub.3. CaO glass system provides erbium doped laser glasses having a Er.sub.2 O.sub.3 batch content of 0.01 mole % Er.sub.2 O.sub.3 to 1.2 mole % Er.sub.2 O.sub.3 (500 ppm Er.sub.2 O.sub.3 to 5.68 wt. % Er.sub.2 O.sub.3) which show little to no concentration quenching and exhibit useful fluorescence lifetimes of approximately 6 milliseconds (ms) or greater.

Abstract: A color display screen having a coating which comprises at least a greend an/or a red phosphor as well as at least a pigment having the following composition:Ga.sub.a In.sub.b Zn.sub.c Al.sub.d O.sub.n S.sub.m Se.sub.o Te.sub.pwherein0.05<a<1.95 0.0.ltoreq.n<0.30.05<b<1.95 2.1<m.ltoreq.30.00.ltoreq.c<0.09 0.0.ltoreq.o<0.30.00.ltoreq.d<0.2 0.0.ltoreq.p<0.3and n+m+o+p=3 and a+b+2/3c+d=2, yields a high-contrast and low-reflection picture, because the pigmentation in accordance with the invention is self-luminescent and its solid-solution properties enable its absorption properties to be accurately adapted to the emission spectrum of the phosphor. The solid solutions having the composition Ga.sub.a In.sub.b Zn.sub.c Al.sub.d O.sub.n S.sub.m Se.sub.o Te.sub.p are characterized by steep absorption edges in the yellow-orange spectral range and by a high absorptivity. This permits thin pigment-containing layers and small quantities of pigment to be used.

Abstract: An ink jet printing ink composition is disclosed for use with an ink jet printing apparatus comprising a printhead, an ink delivery system adapted to provide the ink to the printhead, and a sensor associated with the ink delivery system adapted to produce a signal which is characteristic of the concentration of a label material in a printing ink, where said signal is used to indicate the appropriateness of using a particular printing ink. The ink composition comprises a carrier, a colorant, and a predetermined concentration of a distinct label material, the weight ratio of the label material to the colorant being less than 1. The label material may be easily detected by a sensor associated with the ink delivery system.

Abstract: A low loss piezoelectric ceramic composition cofirable with silver at a reduced sintering temperature and a process for producing the same is provided. The composition is a binary piezoelectric ceramic composition consisting of a main composition which is characterized by 95.0 to 99.5 weight percent of a system represented by a general formula Pb(Zr.sub.x Ti.sub.1-x)O.sub.3 +yMnO.sub.2 in which 0.ltoreq.x.ltoreq.1.0 and 0.1.ltoreq.y.ltoreq.1.0 wt. % The composition also contains 0.5 to 5.0 weight percent of an additive represented by a general formula wB.sub.2 O.sub.3 -xBi.sub.2 O.sub.3 -yMeO-zCuO wherein w,x,y, and z are weight percentages of the respective components and w+x+y+z=1. In the composition, Me is one of the metals selected from a group consisting of Ca, Sr, Ba, Zn, and 0.01.ltoreq.w.ltoreq.0.15, 0.ltoreq.x.ltoreq.0.80, 0.ltoreq.y.ltoreq.0.60 and 0.ltoreq.z.ltoreq.0.55.

Abstract: A phosphor composition selected from a range of phosphor compositions is provided for discharging spent electrons from a display screen of a luminescent display. The selected phosphor composition is a mixture of phosphor species, including a dielectric phosphor species capable of emitting visible green, blue or red light when subjected to excitation electrons at a relatively high voltage and a conductive phosphor species capable of emitting visible green, blue or red light when subjected to energized excitation electrons at a relatively low voltage. The display screen of the luminescent display is coated with the selected phosphor composition to form a cathodoluminescent layer on the screen. The cathodoluminescent layer is then selectively subjected to excitation electrons having a voltage within a predetermined broad range. The excitation electrons impart their energy to the phosphor composition causing it to emit visible green, blue or red light, thereby creating an image on the screen.

Abstract: New phosphors based on doped alkaline earth gallates for electroluminescent (EL) display materials. Bright red EL has been obtained in amorphous and crystalline alkaline earth gallates doped with europium. Powder targets of nominal compositions Sr.sub.4 Ga.sub.2 O.sub.7, Sr.sub.7 Ga.sub.4 O.sub.13, Sr.sub.3 Ga.sub.2 O.sub.6, Sr.sub.3 Ga.sub.4 O.sub.9, SrGa.sub.4 O.sub.7, SrGa.sub.12 O.sub.19, Ba.sub.4 Ga.sub.2 O.sub.7, Ba.sub.3 Ga.sub.2 O.sub.6 and Ca.sub.3 Ga.sub.4 O.sub.9 doped with 1-2% Eu, were RF magnetron sputtered onto BaTiO.sub.3 substrates. Both annealed and as-deposited films yielded bright EL emission in the red part of the visible spectrum with peaks characteristic of the Eu.sup.3+ ion.

Abstract: Quantum splitting phosphors with host lattices activated by praseodymium +3 where covalency of the Pr.sup.+3 -ligand bond is maintained so that the center of gravity of the Pr.sup.+3 4f5d band level is located above the .sup.1 S.sub.0 level and the host lattice has a band gap of greater than about 5 eV.

Abstract: Eutectic compositions of hydrated magnesium nitrate and either or both of sodium and potassium nitrate are described, and are useful as reversible liquid/solid phase change materials.

Abstract: A fluorine-based magnetic fluid, which comprises (A) fine magnetic particles as dispersed in (D) a perfluoropolyether base oil represented by the following general formula:F?CF(CF.sub.3)CF.sub.2 O!mRfwhere Rf is a perfluoroalkyl group by means of general formulae:(B.sub.1){F?CF(CF.sub.3)CF.sub.2 O!nCF(CF.sub.2) (Y)v(R)wO}tPO(OM)u,(B.sub.2)F?CF(CF.sub.3)CF.sub.2 O!nCF(CF.sub.3)YRSO.sub.2 Mor(B.sub.3)F?CF(CF.sub.3)CF.sub.2 O!nCF(CF.sub.3)X(RO)sCH.sub.2 COOMwhere R is a divalent organic group; Y is a COO group or CONH group; X is a COO group or CH.sub.2 O group; and M is a hydrogen group, an alkali metal, an alkaline earth metal or an ammonium group and perfluoroether carboxylic acid amide compounds represented by the following general formulae:(C.sub.1)F?CF(CF.sub.3)CF.sub.2 O!pCF(CF.sub.3)CONH(CH.sub.2)qNH.sub.2,(C.sub.2)F?CF(CF.sub.3)CF.sub.2 O!pCF(CF.sub.3)CONH(CH.sub.2 CH.sub.2 NH)rHor(C.sub.3)F?CF(CF.sub.3)CF.sub.2 O!pCF(CF.sub.3)CONH(CH.sub.2 CH.sub.2 NH)rCOCF(CF.sub.3)?OCF.sub.2 CF(CF.sub.

Abstract: The brightness of small size terbium activated gadolinium oxysulfide (Gd.sub.2-x Tb.sub.x O.sub.2 S) phosphor is increased by the incorporation of a lithium dopant. The lithium dopant is added to the phosphor by mixing lithium phosphate with the raw materials formulated to make the phosphor.

Abstract: An ink composition comprising an ultraviolet radiation curable carrier incorporating a coloured base pigment which emits visible radiation of a first wavelength, and a quantity of luminescent pigment which emits visible radiation by phosphorescent decay or under illumination by long-wave ultraviolet radiation at a second wavelength wherein the concentration of said luminescent pigment is higher than that required just to ensure the visible escape of luminescent radiation from said composition.

Abstract: The invention relates to a method of treating structures of mineral materials, particularly concrete structures, with hydrophobizing substances in the form of silanes and/or siloxanes which are applied to the surfaces of the structures and absorbed therein by capillary action. The hydrophobizing substances may be applied as a thick layer in the form of a gel-like mass of essentially solvent-free silanes and/or siloxanes together with a vehicle medium of a layer-lattice mineral, such as bentonite or montmorillonite. Vehicle medium residues are removed when the hydrophobizing substance has been absorbed into the treated structures.

Abstract: A method for the manufacture of a luminophore comprising the following steps:a) the weighing of the different constituent materials in powder form;b) mixing in an aqueous medium;c) the evaporation of the liquid;d) the screening of the powder at 100 .mu.m;e) baking at a temperature of 1100.degree. C. to 1400.degree. C. in a neutral gas atmosphere with injection of neutral gas into the interior of the powder;f) the screening of the baked powder;g) crushing to reduce the size of the grains and then screening;h) the annealing of the crushed powder at a temperature of 700.degree. C. to 1200.degree. C. so as to obtain a reorganization of the first atomic layers of the grains of the powder;i) the mixing of the annealed powder in an aqueous medium, and sedimentation and then removal of the upper part of the liquid containing the powder in suspension;j) the drying of the removed suspension and the screening of the powder obtained.