Abstract: To provide silica-based particles with a low refractive index, the hollow and spherical silica-based particles include porous materials or cavities inside an outer shell thereof by growing porous composite oxide particles (primary particles) adjusting a ratio of a quantity of added silica sources versus a quantity of added sources for an inorganic oxide other than silica and then removing the inorganic oxide other than silica. The dispersion liquid of silica-based particles is aged at a range from the room temperature to 300° C., cleaning is performed according to the necessity, and hydrothermal processing is performed at a temperature in the range from 50 to 300° C.

Abstract: A transparent film-forming coating liquid is provided which is capable of forming a transparent film that is excellent not only in scratch resistance, film hardness, scratch strength and adhesion to a substrate but also in haze and anti-glare properties. Also provided is a display device having a front panel constituted of a substrate with such a transparent film applied thereto. The transparent film-forming coating liquid comprises inorganic oxide particle groups, in each of which 2 to 10 inorganic oxide particles on an average are linked in the form of a chain, and a polar solvent. In the transparent film-forming coating liquid, the inorganic oxide particles have an average particle diameter of 4 to 200 nm. The inorganic oxide particles are silica particles, and the silica particles are porous particles and/or hollow particles each having a cavity inside.

Abstract: Silica-based particles coated with antimony oxide with a low refractive index and having conductivity are provided. The silica-based particles coated with antimony oxide comprise porous or hollow silica-based particles with antimony oxide coated thereon. A refractive index of the silica-based particles coated with antimony oxide is in the range from 1.35 to 1.60 with the volume resistivity value in the range from 10 to 5000 ?/cm and the average particle diameter in the range from 5 to 300 nm, and the thickness of the antimony oxide coating layer is in the range from 0.5 to 30 nm.

Abstract: A chain antimony oxide fine particle group comprising antimony oxide fine particles which have an average particle diameter of 5 to 50 nm, are connected in the form of a chain and have an average connection number of 2 to 30 and preferably used for forming a hard coating film. The fine particle group can be prepared by a process comprising treating an alkali antimonate aqueous solution with a cation exchange resin to prepare an antimonic acid (gel) dispersion and then treating the dispersion with an anion exchange resin and/or adding a base to the dispersion. Also provided is a substrate with a film comprising a substrate and a hard coating film. The hard coating film includes a chain inorganic oxide fine particle group, in which inorganic oxide fine particles of 2 to 30 on the average are connected in the form of a chain, and a matrix.

Abstract: Disclosed is a coating liquid for forming a transparent conductive film, comprising conductive fine particles having an average particle diameter of 1 to 200 nm, silica particles having an average particle diameter of 4 to 200 nm and a polar solvent. The silica particles are in the form of chain silica particles having 2 to 10 silica particles on an average being connected. The content of an alkali in the silica particles is not more than 1000 ppm in terms of an alkali metal M.

Abstract: A coating liquid for forming a transparent conductive coating, comprising fine particles of a composite metal having an average particle size of 1 to 200 nm and a polar solvent. The above composite metal particles are preferably composed of an alloy of a plurality of metals or comprise fine metal particles or the fine alloy particles covered by a metal having a standard hydrogen electrode potential higher than that of the metal or alloy metal. A substrate with transparent conductive coating comprising a transparent conductive fine particle layer including the composite metal particles and a transparent coating disposed on the transparent conductive fine particle layer. A display device comprising a front panel composed of the above substrate with transparent conductive coating, the transparent conductive coating being formed at an outer surface of the front panel.

Abstract: A coating liquid for forming a transparent conductive coating, comprising fine particles of a composite metal having an average particle size of 1 to 200 nm and a polar solvent. The above composite metal particles are preferably composed of an alloy of a plurality of metals or comprise fine metal particles or the fine alloy particles covered by a metal having a standard hydrogen electrode potential higher than that of the metal or alloy metal.A substrate with transparent conductive coating comprising a transparent conductive fine particle layer including the composite metal particles and a transparent coating disposed on the transparent conductive fine particle layer.A display device comprising a front panel composed of the above substrate with transparent conductive coating, the transparent conductive coating being formed at an outer surface of the front panel.