Abstract: The production method of the present invention is a method for producing porous aluminum magnesium titanate by forming a mixture containing Al source powder, Mg source powder, Ti source powder and Si source powder as well as a pore-forming agent to obtain a molded body; presintering the obtained molded body; and then sintering the presintered molded body, wherein the content of the pore-forming agent to a total of 100 parts by mass for the Al source powder, Mg source powder, Ti source powder and Si source powder is 5 to 30 parts by mass, the melting point of the Si source powder is 600 to 1300° C., when the elemental composition ratio of Al, Mg, Ti and Si in the mixture is represented by compositional formula (1): Al2(1?x)MgxTi(1+x)O5+aAl2O3+bSiO2 ??(1), x satisfies 0.05?x?0.15, a satisfies 0?a?0.1 and b satisfies 0.05?b?0.15, and the presintered molded body is sintered at 1300 to 1560° C.

Abstract: The present invention is a process for producing an aluminum titanate-based ceramics comprising a step of firing a starting material mixture containing a titanium source powder, an aluminum source powder, and a copper source.

Abstract: The present invention is a glass frit comprising 60 to 80% by weight of SiO2, 9 to 20% by weight of Al2O3, 3 to 12% by weight of K2O, and 3 to 12% by weight of Na2O, expressed on oxide basis.

Abstract: The present invention is a process for producing an aluminum titanate ceramics, comprising firing a starting material mixture containing a titanium source powder and an aluminum source powder, wherein a content of niobium, expressed on the oxide basis, is not less than 0.2 parts by mass and not more than 2.5 parts by mass in 100 parts by mass of the starting material mixture.

Abstract: A process for producing an aluminum titanate-based fired body, comprising a step of firing a shaped body of a starting material mixture containing an aluminum source powder, a titanium source powder and a magnesium source powder, wherein the BET specific surface area of the magnesium source powder is not less than 2.0 m2/g and not more than 30.0 m2/g.

Abstract: The invention is to provide an aluminum titanate-based ceramics showing a good mechanical strength. The invention is an aluminum titanate-based ceramics obtained by firing a starting material mixture which contains a titanium element and an aluminum element, and further contains a chromium element and/or a tungsten element. Preferably, a content of a chromium source which contains the chromium element is from 0.001 to 5 parts by mass, and a content of a tungsten source which contains the tungsten element is from 0.001 to 1.0 part by mass relative to 100 parts by mass of the starting material mixture.

Abstract: The invention is to provide a novel process for producing aluminum titanate-based ceramics having a low coefficient of thermal expansion. The invention is a process for producing an aluminum titanate-based ceramic comprising firing a starting material mixture containing a titanium source powder, an aluminum source powder and a silicon source powder, wherein the particle diameter corresponding to a cumulative percentage of 50% (D50) on a volume basis of the silicon source powder is not greater than 5 ?m. The invention includes the process wherein the starting material mixture further contains a magnesium source powder.

Abstract: The invention provides a process for producing a shaped body of aluminum titanate-based ceramic such as aluminum titanate or aluminum magnesium titanate having smaller shrinkage ratio relative to a shaped body of a starting material mixture, and having a smaller coefficient of thermal expansion. The invention is a process for producing an aluminum titanate-based ceramic, comprising firing a starting material mixture containing a titanium source material and an aluminum source material, wherein the BET specific surface area of the aluminum source material is 0.1 m2/g or more and 5 m2/g or less.

Abstract: A pipe-surrounding water-sealing material, which is composed of an elastic composition, and which has an annular shape.

Abstract: A core-shell structure comprises a core (2) comprising nanoparticles and a shell (4) coating the core (2), and its void space (3) formed by the core (2) and the shell (4) is controlled. A method of preparing the core-shell structure comprises: forming particles comprising a photoetchable semiconductor, metal or polymer and coating the particles with a shell (4) comprising a non-photoetchable semiconductor, metal or polymer, to form a core-shell structure (5); and irradiating the core-shell structure with a light having a controlled wavelength in the photoetching solution to form an adjustable void space inside a shell (3) within the core-shell structure by the size-selective photoetching method. The core-shell structure allows the preparation of a catalyst exhibiting an extremely high efficiency, and can be used as a precursor for preparing a nanomaterial required for a nanodevice.

Abstract: A core-shell structure comprises a core (2) comprising nanoparticles and a shell (4) coating the core (2), and its void space (3) formed by the core (2) and the shell (4) is controlled. A method of preparing the core-shell structure comprises: forming particles comprising a photoetchable semiconductor, metal or polymer and coating the particles with a shell (4) comprising a non-photoetchable semiconductor, metal or polymer, to form a core-shell structure (5); and irradiating the core-shell structure with a light having a controlled wavelength in the photoetching solution to form an adjustable void space inside a shell (3) within the core-shell structure by the size-selective photoetching method. The core-shell structure allows the preparation of a catalyst exhibiting an extremely high efficiency, and can be used as a precursor for preparing a nanomaterial required for a nanodevice.