Abstract: The present invention provides a glass substrate having high glass transition temperature and small compaction (C) in a heat treatment at a low temperature (150 to 300° C.), the glass substrate including SiO2, Al2O3, B2O3, MgO, CaO, SrO, BaO, ZrO2, Na2O, K2O, and Li2O, wherein each amount of these compounds is specifically limited, Al2O3+K2O is 7 to 27 mass %, Na2O+K2O is 11.5 to 22 mass %, MgO+CaO+SrO+BaO is 0.2 to 14 mass %, MgO+0.357Al2O3?0.239K2O?5.58 is ?3.0 to 1.5, Na2O+0.272Al2O3+0.876K2O?16.77 is ?2.5 to 2.5, a glass transition temperature is 500° C. or higher, and an average thermal expansion coefficient at 50 to 350° C. is 100×10?7/° C. or less.

Abstract: To provide a high zirconia fused cast refractory having high durability, which hardly has cracks during the heating, by temperature changes during use and during the cooling at the time of suspension of operation. A high zirconia fused cast refractory which has a chemical composition comprising from 86 to 96 mass % of ZrO2, from 2.5 to 8.5 mass % of SiO2, from 0.4 to 3 mass % of Al2O3, from 0.4 to 1.8 mass % of K2O, at most 0.04 mass % of B2O3, at most 0.04 mass % of P2O5 and at most 3.8 mass % of Cs2O and containing substantially no Na2O.

Abstract: To provide glass to be used for chemically tempered glass, of which the strength is less likely to be reduced even when indentations are formed thereon. Glass for chemical tempering, which comprises, as represented by mole percentage based on oxides, from 62 to 68% of SiO2, from 6 to 12% of Al2O3, from 7 to 13% of MgO, from 9 to 17% of Na2O, and from 0 to 7% of K2O, wherein the difference obtained by subtracting the content of Al2O3 from the total content of Na2O and K2O is less than 10%, and when ZrO2 is contained, its content is at most 0.8%. Chemically tempered glass obtained by chemically tempering such glass for chemical tempering. Such chemically tempered glass has a compressive stress layer formed on the glass surface, which has a thickness of at least 30 ?m and a surface compressive stress of at least 550 MPa.

Abstract: To provide a high zirconia fused cast refractory which hardly has cracks, and has excellent durability and reusability, at the time of production of the refractory and during use for a glass melting furnace. A high zirconia fused cast refractory which has a chemical composition comprising from 85 to 95 mass % of ZrO2, at least 2.5 mass % of SiO2, at most 0.04 mass % of Na2O, at most 0.04 mass % of B2O3, and at most 0.04 mass % of P2O5, containing SrO as an essential component, and containing at least one of K2O and Cs2O, wherein contents of SrO, K2O and Cs2O satisfy the relations of the following formula (1) and (2) at the same time: 0.20?[0.638×CK2O+0.213×CCs2O+0.580×CSrO]/CSiO2?0.40 ??(1) 0.10?0.

Abstract: The present invention relates to a method for producing a doped quartz glass, containing: a raw material gas-forming step of vaporizing a liquid raw material containing a silicon compound and a sublimable organic metal compound to form a raw material gas, and a glass fine particle-forming step of feeding the raw material gas to oxyhydrogen flame and reacting the gas in the flame to form a glass fine particle.

Abstract: To provide a process for forming a polymer electrolyte membrane having good durability and few wrinkles, a polymer electrolyte membrane capable of forming a catalyst layer, or a catalyst layer; a process for producing a fluorinated ion exchange resin fluid, or a paste for forming a catalyst layer, which can be used for such a forming process; and a process for producing a membrane/electrode assembly for a polymer electrolyte fuel cell having good durability and power generation properties. A fluorinated ion exchange resin fluid obtained by subjecting a powder or pellets of a fluorinated ion exchange resin having cation exchange groups to hydrogen peroxide treatment, followed by mixing with a solvent, is used.

Abstract: A glass plate made of soda lime silica glass containing at least MgO, CaO, Na2O and Al2O3 produced by a float process or a downdraw method, wherein [MgO] is at least 4.5%, [MgO]/[CaO] is larger than 1, and Q=([MgO]/[CaO])×([CaO]+[Na2O]?[Al2O3]) is at least 20, wherein [MgO] is the content of MgO, [CaO] is the content of CaO, [Na2O] is the content of Na2O, and [Al2O3] is the content of Al2O3 (each being as represented by mass percentage based on oxide) and a process for the glass plate.

Abstract: To provide a coating composition for coating the surface of a solar heat-collecting reflective plate, capable of forming on the surface of a reflective substrate a coating film which has excellent weather resistance and impact resistance, and which is excellent in the adhesion and is thereby hardly peeled, and a process for producing a solar heat-collecting reflective plate using the coating composition. A coating composition which comprises a fluorinated polymer (A) having a hydroxy value of from 110 to 250 mgKOH/g resin, a polyester polymer (B) having a hydroxy value of from 100 to 300 mgKOH/g resin, a polyisocyanate type curing agent (C) and a solvent (D). Further, a process for producing a solar heat-collecting reflective plate, which comprises applying the coating composition to a surface of a reflective substrate to form a coating layer, and removing the solvent (D) to form a coating film.

Abstract: To efficiently carry out spheroid culturing. A culture substrate is a culture container to culture cells and three-dimensionally aggregate them to prepare spheroids. The culture substrate is made of a synthetic resin material. On a surface of the culture substrate, a plurality of dents 20 to be compartments in which cells are cultured are formed. The plurality of dents 20 are formed by laser irradiation on the culture substrate surface. At the peripheries of openings of the dents 20, the synthetic resin material is melted and piled up to form banks 22. The culture substrate surface between two adjacent dents 20 is a non-flat surface.

Abstract: A process for producing a plate glass for a display device having a thickness of at most 1.5 mm by a float process, wherein the plate glass comprises, as represented by mole percentage based on the following oxides, from 67 to 75% of SiO2, from 0 to 4% of Al2O3, from 7 to 15% of Na2O, from 1 to 9% of K2O, from 6 to 14% of MgO and from 0 to 1.5% of ZrO2, has a total content of SiO2 and Al2O3 of from 71 to 75%, has a total content Na2O+K2O of Na2O and K2O of from 12 to 20%, and has a content of CaO of less than 1% if contained.

Abstract: To provide a process for producing a charge retention medium, with which a coating film (precursor of a charge retention medium) containing a fluorinated copolymer having repeating units based on tetrafluoroethylene and repeating units based on ethylene can easily be formed on the surface of a substrate, even in a case where the surface of the substrate has a complicated shape. A process for producing a charge retention medium (electret 30), which comprises a step of applying a coating composition containing a fluorinated copolymer (A) having repeating units based on tetrafluoroethylene and repeating units based on ethylene, and an organic solvent (C), to a substrate (first substrate 10) to form a coating film.

Abstract: A reflective mask for an extreme ultra violet (EUV) lithography obtained by forming a mask pattern in an absorber layer of an reflective mask blank is useful in semiconductor production. The EUV reflective mask has two regions of a mask pattern region and a region outside the mask pattern region. The mask pattern region has the absorber layer and a non-absorber layer on the reflective layer of an substrate, wherein the region outside the mask pattern region has an EUV reflective layer, an EUV absorber layer, and a light shielding layer for suppressing reflection of EUV light and DUV-Vis light having a wavelength of from 190 to 500 nm. The EUV reflective mask reduces unnecessary exposure of resist formed on a substrate to reflected light from the region outside the mask pattern region and reduces a pattern size to produce an accurate transfer pattern.

Abstract: An aqueous coating composition, which comprises water and particles that have an average particle size of from 50 to 100 nm and are made of a fluorinated copolymer (A) having from 40 to 60 mol % of fluoroolefin polymerized units (a1), from 1 to 5 mol % of polymerized units (a2) having carboxy groups in which from 95 to 100 mol % of the carboxy groups are changed into carboxylate groups, from 4 to 30 mol % of polymerized units (a3) having crosslinking groups other than carboxy groups, and from 3 to 50 mol % of polymerized units (a4) having a group containing an ether bond or ester bond in its side chain, based on the total amount of polymerized units contained in the copolymer, and which is characterized by having a pH of from 7.0 to 9.5.

Abstract: An optical fiber connector comprises a ferrule having a rear end, a chuck located rearward of the ferrule, a ring having a front end, and a coil spring. The ring is attached to the chuck so as to surround the chuck. The optical fiber connector holds an optical fiber which is inserted from a rear end of the optical fiber connector. In detail, when the optical fiber is inserted into the optical fiber connector, an end of the optical fiber passes through the chuck to be accommodated in the ferrule. The coil spring presses the ring forward (toward the ferrule) so that the chuck is squeezed to hold the inserted optical fiber. When the ring is moved rearward by a stopper inserted between the rear end of the ferrule and the front end of the ring, the chuck is released to release the optical fiber.

Abstract: The present invention relates to a plastic optical fiber unit in which a plurality of plastic optical fibers each comprising an optical fiber body and a reinforcing layer covering an outer circumference of the optical fiber body is bundled in a longitudinal direction and integrated, and a coating resin is applied so as to cover the entire bundle of the plastic optical fibers, in which the plastic optical fiber unit satisfies the relationship of 0.15?T/D?0.50 when a thickness of the reinforcing layer of the plastic optical fiber is D and a shortest distance of from the plastic optical fiber to the outer circumference of the plastic optical fiber unit is T.

Abstract: An object of the present invention is to provide a surface-treated glass plate having a concave portion on the order of nanometers, in which the depth of the concave portion is sufficiently large for the size thereof and which is free from an abnormal bump portion and excellent in the transparency to visible light. The present invention relates to a surface-treated glass plate having a plurality of the concave portions provided in a glass surface, in which a plane of the glass surface, excluding a region in which the concave portions are formed, is a flat plane, and the concave portions have an average open pore diameter of 10 nm to less than 1 ?m in a cross-sectional view thereof.

Abstract: A conduit structure for molten glass, in which molten glass is flown through a double-pipe structure, with little stress loading even for a long time operation. A supporting rib connecting an inner pipe and an outer pipe is employed in the double pipe structure having the inner pipe and outer pipe in the conduit structure for molten glass, wherein excessive stress concentration hardly occurs in an inner pipe-joint portion, an outer pipe-joint portion and the rib when the rib is applied with a stress load due to the weight of the inner pipe.

Abstract: An organic EL element includes a transparent substrate; a first electrode; an organic light emitting layer formed on the first electrode; and a second electrode formed on the organic light emitting layer, wherein a scattering layer including a base material made of glass and scattering substances dispersed in the base material is provided on the transparent substrate, and a light extraction assistance layer is provided between the scattering layer and the first electrode, the light extraction assistance layer being made of an inorganic material other than glass.

Abstract: A water- and oil-repellent agent composition having a lower environmental impact to obtain articles having higher water-repellent friction durability and improved texture. The invention also provides an article treated on the surface with the water- and oil-repellent agent composition. The water- and oil-repellent agent composition includes a first fluoropolymer having structural units based on a first monomer and structural units based on a second monomer; a second fluoropolymer (excluding the first fluoropolymer) having structural units based on a third monomer; and an aqueous medium. The first monomer: compound represented by (Z—Y)nX, where Z is a C1-6 polyfluoroalkyl group or the like, Y is a bivalent organic group or the like, n is 1 or 2, and X is a polymerizable unsaturated group. The second monomer: (meth)acrylate having a C18-30 alkyl group but not a polyfluoroalkyl group. The third monomer: a fluoroolefin.

Abstract: Disclosed are a diffractive optical element and a measurement device that are capable of reliably suppressing occurrence of a zero-order diffracted light beam and generating light spots in a wide range. The diffractive optical element has concave and convex portions and diffracts incident light in two dimensions to generate diffracted light. When a maximum diffraction angle with reference to an optical axis of the incident light is an angle range ?, the angle range ? is 7.5° or greater, and diffraction efficiency in a zero-order diffracted light beam is 5% or less.