Abstract: Disclosed is a method for manufacturing a sintered body by sintering with laser irradiation, the method for manufacturing a sintered body, including: a raw material providing step of providing a raw material containing a ceramic powder and a laser absorbing oxide having an absorption rate at a laser wavelength higher by 5% or more than that of the ceramic powder; an article forming step of forming an article formed from the raw material, an article partially including a region consisting of only the raw material, or an article formed from the raw material and formed on a base material; and a sintering step of irradiating the article with a laser to form a sintered portion.

Abstract: An object of the present invention is to provide a porous ceramic laminate that can reduce pressure loss of a fluid. The present invention is a porous ceramic laminate comprising a first porous layer and a second porous layer, wherein the second porous layer is laminated on the first porous layer, the second porous layer has a portion being laminated on, in contact with, the first porous layer and a portion being laminated over the first porous layer via air, and a coefficient of variance CV (tb) of the second porous layer thickness is not larger than 0.35.

Abstract: A method for producing an alumina sintered body, comprising: molding an alumina powder to obtain an alumina article, the alumina powder comprising alumina particles having a particle diameter of not less than 0.1 ?m and less than 1 ?m, and alumina particles having a particle diameter of not less than 1 ?m and less than 100 ?m; forming a carbon powder-containing layer on a surface of the alumina article to obtain a laminate body; and irradiating a surface of the carbon powder-containing layer of the laminate body with a laser light to form a transparent alumina sintered portion.

Abstract: An object of the present invention is to provide an alumina used for a slurry for reducing unevenness in a surface of a porous membrane. The present invention is an ?-alumina wherein a crystallite size obtained by a Rietveld analysis is not greater than 95 nm, and a lattice strain obtained by the Rietveld analysis is not greater than 0.0020. A BET specific surface area by a nitrogen adsorption method of the ?-alumina is preferably not greater than 10 m2/g. A particle diameter D50 equivalent to 50% cumulative percentage by volume of the ?-alumina is also preferably not greater than 2 ?m.

Abstract: A porous ceramic laminate, which can reduce pressure loss of a fluid, includes a first porous layer and a second porous layer. The second porous layer is laminated on, in contact with or via air, the first porous layer. A part of the second porous layer is laminated on, in contact with, the first porous layer. Each of the first porous layer and the second porous layer contains a metal oxide. A ratio Da/Db of an average pore diameter Da of the first porous layer relative to an average pore diameter Db of the second porous layer is 10 or more. A proportion of a portion in which a distance between the first porous layer and the second porous layer is smaller than 1 ?m is 70% or less.

Abstract: Proposed are a metal-substituted titanium oxide which has a composition other than conventional Ti3O5 while having a property of being able to undergo phase transition from a crystal structure in a paramagnetic metal state to a crystal structure of a nonmagnetic semiconductor upon application of pressure or light and which can also be used in fields other than conventional technical fields, and a method for producing a metal-substituted titanium oxide sintered body.

Abstract: A magnetic ?-form iron oxide nanopowder is a novel magnetic iron oxide nanopowder having magnetic polarization and spontaneous electric polarization and having physical properties similar to those of half-metals; and a process produces the magnetic nanopowder. The magnetic powder has a composition represented by Fe2O3 and has a crystal structure belonging to the monoclinic system.

Abstract: The present invention relates to a magnetic material containing a magnetic alloy particle having an ordered crystal structure. The magnetic material according to the present invention is the one composed of a magnetic alloy particle having crystal magnetic anisotropy and being composed of an FePt alloy, a CoPt alloy, an FePd alloy, a Co3Pt alloy, an Fe3Pt alloy, a CoPt3 alloy, an FePt3 alloy, or the like, and a silica carrier covering the magnetic alloy, in which the silica carrier contains an alkali-earth metal compound such as an oxide, hydroxide or silicate compound of Ba, Ca, or Sr. The magnetic material according to the present invention is excellent in magnetic properties such as coercive force.

Abstract: A magnetic ?-form iron oxide nanopowder is a novel magnetic iron oxide nanopowder having magnetic polarization and spontaneous electric polarization and having physical properties similar to those of half-metals; and a process produces the magnetic nanopowder. The magnetic powder has a composition represented by Fe2O3 and has a crystal structure belonging to the monoclinic system.