The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % of the total cation amount, and has a molar ratio of (cerium+the additional element):(zirconium) of 43:57 to 48:52.

Provided is a method for preparing a grain boundary insulation-type dielectric. The method includes the steps of obtaining a titanic acid compound and a ferroelectric having a value less than a melting point of the titanic acid compound; obtaining a mixture by adding the ferroelectric material to the titanic acid compound; and sintering the mixture at a temperature equal to or more than a melting point of the ferroelectric material.

A garnet ceramic phosphor with Ce and Mn co-doping, wherein calcium and silicon in the phosphor crystal host can be minimized for enhancing performance, is described herein. Also a ceramic phosphor element comprising a garnet phosphor having composition of formula 1 or 2 is described herein:
(A.sub.1-x,Ce.sub.x).sub.3(Al.sub.1-y,Mn.sub.y).sub.5-wSi.sub.wO.sub.12(Formula 1)
(Lu.sub.1-x,Ce.sub.x).sub.3(Al.sub.1-y,Mn.sub.y).sub.5-wSi.sub.wO.sub.12(Formula 2).

Disclosed herein is an amorphous C12A7 electride thin film which has an electron density of greater than or equal to 2.0?10.sup.18 cm.sup.?3 and less than or equal to 2.3?10.sup.21 cm.sup.?3, and exhibits a light absorption at a photon energy position of 4.6 eV. Also disclosed herein is an amorphous thin film which is fabricated using a target made of a crystalline C12A7 electride, and containing an electride of an amorphous solid material including calcium, aluminum, and oxygen, in which an Al/Ca molar ratio of the thin film is 0.5 to 4.7.

A method of forming a MAX Phase composite can include forming a precursor powder into a discrete shape to thereby form a green body; heating the green body at a pre-sintering temperature to partially reduce the oxide present in the green body to thereby form a pre-sintered preform; and performing reactive infiltration by heating the pre-sintered preform in the presence of an infiltrating material comprising an A-group element to an infiltration temperature suitable for transforming the infiltrating material to a molten state, wherein the molten infiltrating material reacts with the pre-sintered preform to thereby form the MAX Phase composite

The object of the present invention is to provide a high-performance exhaust gas purifying catalyst that can achieve oxygen absorption/release capacity and NOx purification performance. The object is solved by an exhaust gas purifying catalyst, which comprises a ceria-zirconia composite oxide having a pyrochlore-type ordered array structure in the upstream part of the catalyst coating layer, in which the ceria-zirconia composite oxide contains at least one additional element selected from the group consisting of praseodymium, lanthanum, and yttrium at 0.5 to 5.0 mol % of the total cation amount, and has a molar ratio of (cerium+the additional element):(zirconium) of 43:57 to 48:52.

A manufacturing method of a silicon carbide-based honeycomb structure, including a firing step of introducing extruded honeycomb formed bodies containing a silicon carbide-based component, together with firing members into a firing furnace, and firing the honeycomb formed bodies, to manufacture the silicon carbide-based honeycomb structure, wherein the firing members are formed by using a ceramic material containing 70 wt % or more of alumina, and the firing step further includes: an inert gas supplying step of supplying an inert gas to a furnace space of the firing furnace, and a gas adding step of adding a reducing gas to the furnace space.

A ceria-zirconia-based composite oxide containing a composite oxide of ceria and zirconia is provided, in which primary particles having a particle diameter of 1.5 to 4.5 m account for, on a particle number basis, at least 50% of all primary particles in the ceria-zirconia-based composite oxide, and the molar ratio of cerium to zirconium in the ceria-zirconia-based composite oxide is between 43:57 and 55:45.

A ceria-zirconia-based composite oxide containing a composite oxide of ceria and zirconia is provided, in which primary particles having a particle diameter of 1.5 to 4.5 m account for, on a particle number basis, at least 50% of all primary particles in the ceria-zirconia-based composite oxide, and the molar ratio of cerium to zirconium in the ceria-zirconia-based composite oxide is between 43:57 and 55:45.

A method for manufacturing a wavelength conversion member that offers a high emission intensity and a high light conversion efficiency is provided. The method for manufacturing a wavelength conversion member includes providing a green body containing an yttrium-aluminum-garnet phosphor with a composition represented by Formula (I) below and alumina particles with an alumina purity of 99.0% by mass or more, primary-sintering the green body to obtain a first sintered body, and secondary-sintering the first sintered body by applying a hot isostatic pressing (HIP) treatment to obtain a second sintered body.

(Y.sub.1-a-bGd.sub.aCe.sub.b).sub.3Al.sub.5O.sub.12(I)

wherein a and b satisfy 0a0.3 and 0<b0.022.