Abstract: A lithium ion conductive solid electrolyte formed by sintering a molding product containing an inorganic powder and having a porosity of 10 vol % or less, which is obtained by preparing a molding product comprising an inorganic powder as a main ingredient and sintering the molding product after pressing and/or sintering the same while pressing, the lithium ion conductive solid electrolyte providing a solid electrolyte having high battery capacity without using a liquid electrolyte, usable stably for a long time and simple and convenient in manufacture and handling also in industrial manufacture in the application use of secondary lithium ion battery or primary lithium battery, a solid electrolyte having good charge/discharge cyclic characteristic in the application use of the secondary lithium ion battery a solid electrolyte with less water permeation and being safe when used for lithium metal-air battery in the application use of primary lithium battery, a manufacturing method of the solid electrolyte, and a

Abstract: In all of an in-plane magnetic recording system and a perpendicular magnetic recording system, there is provided a crystallized glass for a disk substrate for information recording medium, etc., which has satisfactory surface properties capable of sufficiently adapting with a lamp loading system for high-density recording, has high strength such that it is able to withstand high-speed rotation and impact, has heat expansion properties and heat resistance in agreement with respective drive members, has a low melting temperature, has excellent productivity and is reduced in the elution amount of an alkali from the raw material, namely excellent in chemical durability. The crystallized glass of the invention is a crystallized glass containing an SiO2 component and an Li2O component; further containing at least one member selected from an SrO component and a BaO component in a total content of more than 3.

Abstract: A preform for an optical element is provided which involves less amount of deformation of glass in molding, and readily improves lifetime of the mold. The present preform for molding an optical glass element 10 exhibits an almost circular shape having a predetermined diameter in top view, exhibits a flattened semicircular shape having a predetermined overall height in side view, has a concave face on the top surface such that the predetermined overall height is attained at approximately the central position of the aforementioned circular shape, and has a concave face so as to fit along the convex face of the top surface such that a space is provided on the bottom face. The under surface may be either a concave face or a convex face. Also, the top surface may be either a concave face or a convex face.

Abstract: The present invention provides optical glasses containing Bi2O3 in which the optical glasses have at least one of the properties of being substantially free from opacification and being substantially devitrified within the glass body during reheating steps in production processes, superior chemical durability, and free from black coloring. The optical glass has a refractive index (nd) of no less than 1.75 and an Abbe number (?d) of no less than 10 as optical constants. The optical glass contains Bi2O3 in a content from no less than 10% by weight to less than 90% by weight, and has at least one of the properties of being substantially free from opacification and being substantially devitrified within the glass body under the conditions of a reheating test (a).

Abstract: A preform production apparatus for precision press molding, which is downsized but can produce preforms at a lower cost, and a production method thereof using the apparatus are provided. The production method of a preform for precision press molding includes forming a molten glass body C by way of receiving and cutting molten glass A, being flowed continuously from a discharge nozzle 2, by a support member 1 or by way of allowing molten glass to fall in drops from a discharge nozzle 2 and receiving thereof by a support member 1, and transferring the molten glass body C from the support member 1 to a mold 5 by way of displacing the support member to near the mold 5, disposed not to be beneath the discharge nozzle 2, while increasing the viscosity of the molten glass body C on the support member 1.

Abstract: A glass composition being suitable for precision mold press forming, having superior resistance to devitrification, having optical constants (a refractive index, an Abbe number, and the like) required for aspherical lenses, and a low glass transition temperature. There is provided an optical glass comprising no less than 5 mol % and no more than 60 mol % of a B2O3 component, and no less than 0.2 mol % and no more than 60 mol % of a TeO2 component, by mol % on the basis of oxides. Further, there is provided an optical glass mentioned above having optical constants with a refractive index (nd) of 1.80 to 2.20, and an Abbe number (?d) of 16 to 40. Still further, there is provided an optical glass mentioned above having a glass transition temperature (Tg) of no more than 680° C.

Abstract: An optical glass having optical constants of a refractive index (nd) of 1.78 or over, an Abbe number (?d) of 30 or below, and a partial dispersion ratio (?g, F) of 0.620 or below comprises SiO2 and Nb2O5 as essential components, wherein an amount of Nb2O5 in mass % is more than 40%. The optical glass further comprising, in mass % on oxide basis, less than 2% of K2O and one or more oxides selected from the group consisting of B2O3, TiO2, ZrO2, WO3, ZnO, SrO, Li2O and Na2O wherein a total amount of SiO2, B2O3, TiO2, ZrO2, Nb2O5, WO3, ZnO, SrO, Li2O and Na2O is more than 90% and TiO2/(ZrO2+Nb2O5) is less than 0.32.

Abstract: An inorganic composition article used in disk substrate for information recording media, with a low melting point and a high productivity, combining superior surface characteristics capable of sufficiently dealing with a ramp load system for high density recording in both an in-plane magnetic recording system and a perpendicular magnetic recording system, having a high mechanical strength capable of enduring high speed rotation and impact, and combining both a heat expansion characteristic and heat resistance corresponding to each drive component. The inorganic composition articles contain a Li2O component and an Al2O3 component, with the percent by mass ratio of Li2O to Al2O3 (Li2O/Al2O3) being at least 0.3, include crystals, and have a compressive stress layer arranged on a surface.

Abstract: Provided are SiO2—Al2O3-based or Li2O—Al2O3—SiO2-based crystallized glass which has various properties intrinsic to the crystallized glass of the type and which contains an arsenic component or an antimony component in an amount as small as possible or does not contain an arsenic component and an antimony component; and a method for producing the crystallized glass. The crystallized glass contains components of SiO2 and Al2O3 (as oxides) and contains an SnO2 component (as oxide) and/or a CeO2 component (as oxide). Preferably, the glass contains from 0.01 to 5.0% (as oxide) of an SnO2 component and/or from 0.01 to 5.0% (as oxide) of a CeO2 component.

Abstract: An optical glass having optical constants of a refractive index (nd) of 1.78 or over, an Abbe number (?d) of 30 or below, and a partial dispersion ratio (?g, F) of 0.620 or below comprises SiO2 and Nb2O5 as essential components, wherein an amount of Nb2O5 in mass % is more than 40%. The optical glass further comprising, in mass % on oxide basis, less than 2% of K2O and one or more oxides selected from the group consisting of B2O3, TiO2, ZrO2, WO3, ZnO, SrO, Li2O and Na2O wherein a total amount of SiO2, B2O3, TiO2, ZrO2, Nb2O5, WO3, ZnO, SrO, Li2O and Na2O is more than 90% and TiO2/(ZrO2+Nb2O5) is less than 0.32.

Abstract: There is provided an optical glass with a high refractive index and a low dispersion having a refractive index (nd) of not less than 1.75 and an Abbe's number (?d) of not less than 35 where the image formation characteristic is hardly affected by changes in temperature of the using environment. SiO2, B2O3 and La2O3 are contained as essential components and the ratio of the constituting components are adjusted whereby an optical glass in which a product of ? and ? where ? is an average linear expansion coefficient at ?30 to +70° C. and ? is an optical elasticity constant at the wavelength of 546.1 nm is not more than 130×10?12° C.?1×nm×cm?1×Pa?1 is able to be achieved.

Abstract: There is provided an optical glass with a high refractive index and a low dispersion having a refractive index (nd) of not less than 1.75 and an Abbe's number (?d) of not less than 35 where the image formation characteristic is hardly affected by changes in temperature of the using environment. SiO2, B2O3 and La2O3 are contained as essential components and the ratio of the constituting components are adjusted whereby an optical glass in which a product of ? and ? where ? is an average linear expansion coefficient at ?30 to +70° C. and ? is an optical elasticity constant at the wavelength of 546.1 nm is not more than 130×10?12° C.?1×nm×cm?1×Pa?1 is able to be achieved.

Abstract: A preform for an optical element is provided which involves less amount of deformation of glass in molding, and readily improves lifetime of the mold. The present preform for molding an optical glass element 10 exhibits an almost circular shape having a predetermined diameter in top view, exhibits a flattened semicircular shape having a predetermined overall height in side view, has a concave face on the top surface such that the predetermined overall height is attained at approximately the central position of the aforementioned circular shape, and has a concave face so as to fit along the convex face of the top surface such that a space is provided on the bottom face. The under surface may be either a concave face or a convex face. Also, the top surface may be either a concave face or a convex face.

Abstract: Optical glass having a refractive index (nd) of 1.85 or greater, and an Abbe number (?d) falling within the range of 10 to 30, which is suited for molding by precision mold press is provided. The optical glass is characterized by including B2O3+SiO2 in an amount of 3 to 60%, Bi2O3 in an amount of 25 to 80%, RO+Rn2O in an amount of 5 to 60% (wherein R represents one or more selected from a group consisting of Zn, Ba, Sr, Ca, and Mg; and Rn represents one or more selected from a group consisting of Li, Na, K, and Cs), with each component in the range expressed in oxide-based mole percentage, and is characterized in that transparency in the visible region is high, and that the transition point (Tg) is 480° C. or lower. The optical glass is characterized by having a spectral transmittance of 70% or greater at a wavelength of 600 nm for a thickness of 10 mm.

Abstract: An all solid state battery having high output performance and a manufacturing method thereof are provided. The all solid state battery of the present invention comprises a negative electrode layer, a positive electrode layer, and a solid electrolyte layer having a lithium ion conductivity. At least one layer of the solid electrolyte, the positive electrode layer, and the negative electrode layer includes a lithium ion conductive crystal and AxByOz (A is one or more selected from the group consisting of Al, Ti, Li, Ge, and Si. B is one or more selected from the group consisting of P, N, and C, wherein 1?X?4, 1?Y?5, and 1?Z?7). The solid electrolyte material to which a preferable sintering additive is added in a predetermined ratio is densified by firing at relatively low temperature in the manufacturing process. The ion conductivity thereof is also high.

Abstract: To provide a substrate for information recording medium having various properties, in particular higher fracture toughness, required for application of the substrate for information recording medium of the next generation such as perpendicular magnetic recording system, etc. and a material with excellent workability for such purpose. A crystallized glass substrate for information recording medium, consisting of a crystallized glass which comprises one or more selected from RAl2O4 and R2TiO4 as a main crystal phase, in which R is one or more selected from Zn, Mg and Fe, and in which the main crystal phase has a crystal grain size in a range of from 0.5 nm to 20 nm, a degree of crystallinity of 15% or less, and a specific gravity of 3.00 or less.

Abstract: For providing glass-ceramics having properties suitable for use as a substrate of an information storage medium of next generation such as one for the perpendicular magnetic recording system without employing arsenic and antimony components which adversely affect human beings and the environment, there are provided glass-ceramics comprising SiO2, Li2O and Al2O3 on oxide basis, comprising lithium disilicate as a crystal phase, and comprising one or more elements selected from the group consisting of Sn, Ce, Mn, W, Ta, Bi, Nb, S, Cl and F.

Abstract: A glass composition being suitable for precision mold press forming, having superior resistance to devitrification, having optical constants (a refractive index, an Abbe number, and the like) required for aspherical lenses, and a low glass transition temperature. There is provided an optical glass comprising 5 mol % to 60 mol % of a B2O3 component, and 0.2 mol % to 60 mol % of a TeO2 component, by mol % on the basis of oxides. Further, there is provided an optical glass mentioned above having optical constants with a refractive index (nd) of 1.80 to 2.20, and an Abbe number (?d) of 16 to 40. Still further, there is provided an optical glass mentioned above having a glass transition temperature (Tg) of no more than 680° C.

Abstract: The all-solid battery has two electrode layers of a positive electrode and a negative electrode interposing a solid electrolyte layer therebetween, in which at least one of the electrode layers is composed of a sintered body of a mixed material including at least one or more types of electrode active material particles comprising electrode active material and solid electrolyte particles comprising solid electrolyte, and a portion of at least 30% by area of a grain boundary surrounding the electrode active material particles has a coating layer with a thickness of 1 to 200 nm.

Abstract: Optical glass has a refractive index of 1.83 or above and an Abbe number of 26 or less and contains SiO2, TiO2, Nb2O5 and Na2O as its essential constituents in such proportions on a final oxide basis that the amounts of its oxide constituents as expressed on a mass percentage basis may satisfy the relationship: (TiO2+Nb2O5)/(Na2O+K2O)=3.0 to 4.0.