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 μm. The invention includes the process wherein the starting material mixture further contains a magnesium source powder.
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:
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 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:
A honeycomb structure 100 has a plurality of flow paths 110a and 110b which are partitioned by partition walls 120 and are substantially parallel to each other; and one end of the flow path 110a is plugged by a plugging part 130 at one end surface 100a of the honeycomb structure 100, and one end of the flow path 110b is plugged by a plugging part 130 at the other end surface 100b of the honeycomb structure 100, wherein, in an image of the partition walls 120 obtained by X-ray CT measurement, when the number of communicating holes detected when resolution of the image is 1.5 μm/pixel is defined as X, and the number of communicating holes detected when resolution of the image is 2.5 μam/pixel is defined as Y, Y/X is 0.58 or more.
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 translation:本发明是以氧化物为基准,含有60〜80重量%的SiO 2,9〜20重量%的Al 2 O 3,3〜12重量%的K 2 O,3〜12重量%的Na 2 O。
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.