A slurry or slip composed of a dispersion medium and a dispersoid including sinterable raw material powder containing a complex oxide powder represented by the following formula (1):

(Tb.sub.1-x-yR.sub.xSc.sub.y).sub.3(Al.sub.1-zSc.sub.z).sub.5O.sub.12(1)

wherein R is yttrium and/or lutetium, 0.05x<0.45, 0<y<0.1, 0.5<1-x-y<0.95, and 0.004<z<0.2 is prepared; the slurry or slip is subsequently enclosed in a mold container to be subjected to solid-liquid separation by centrifugal casting to mold a cast compact; the cast compact is dried thereafter; a dried compact is degreased; a degreased compact is sintered thereafter; and a sintered body is further subjected to a hot isostatic pressing treatment to obtain the transparent ceramic material composed of the sintered body of garnet-type rare earth complex oxide represented by the formula (1).

Solid electrolytes, anodes and cathodes for SOFC. Doped BaCeO.sub.3 useful for solid electrolytes and anodes in SOFCs exhibiting chemical stability in the presence of CO.sub.2, water vapor or both and exhibiting proton conductivity sufficiently high for practical application. Proton-conducting metal oxides of formula Ba.sub.1xSr.sub.xCe.sub.1y1y2y3Zr.sub.y1Gd.sub.y2Y.sub.y3O.sub.3 where x, y1, y2, and y3 are numbers as follows: x is 0.4 to 0.6; y1 is 0.1-0.5; y2 is 0.05 to 0.15, y3 is 0.05 to 0.15, and cathode materials of formula II GdPrBaCo.sub.2zFe.sub.zO.sub.5+ where z is a number from 0 to 1, and is a number that varies such that the metal oxide compositions are charge neutral. Anodes, cathodes and solid electrolyte containing such materials. SOFC containing anodes, cathodes and solid electrolyte containing such materials.

To a co-precipitating aqueous solution, aqueous solutions containing (a) Tb ions, (b) at least one other rare earth ions selected from the group consisting of Y ions and lanthanoid rare earth ions (excluding Tb ions), (c) Al ions and (d) Sc ions are added; the resulting solution is stirred at a liquid temperature of 50 C. or less to induce a co-precipitate of the components (a), (b), (c) and (d); the co-precipitate is filtered, heated and dehydrated; and the co-precipitate is fired thereafter at from 1,000 C. to 1,300 C., thereby forming a sinterable garnet-type complex oxide powder.

In the piezoelectric film including a perovskite oxide which is represented by General Formula P, 0.1x0.3 and 0<y0.49x are satisfied, A.sub.1+[(Zr,Ti).sub.1-x-yNb.sub.xSc.sub.y]O.sub.z . . . General Formula P, in General Formula P, A is an A-site element primarily containing Pb, =0 and z=3 are standard values, but and z may deviate from standard values in a range in which a perovskite structure is capable of being obtained.

A metal-supported material including a transition metal excluding Group 4 elements supported on a binary composite oxide. The composite oxide includes a metal element expressed by A.sub.nX.sub.y, where A represents a lanthanoid that is in a partially or entirely trivalent state, X represents an element that is a Group-2 element in a periodic table selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid, and that is different from A, n satisfies 0<n<1, y satisfies 0<y<1, m satisfies 0?m<1, and n+y=1. The composite oxide includes a solid solution that is a tetragonal crystal or a cubic crystal, and a ratio of a value (D.sub.ads) of a dispersion degree of the transition metal obtained by an H.sub.2 pulse chemical adsorption method to a value (D.sub.TEM) of the dispersion degree predicted from an average particle diameter of particles of the transition metal obtained from a TEM image satisfies 0<D.sub.ads/D.sub.TEM<1.

A metal-supported material including a transition metal excluding Group 4 elements supported on a binary composite oxide. The composite oxide includes a metal element expressed by A.sub.nX.sub.y, where A represents a lanthanoid that is in a partially or entirely trivalent state, X represents an element that is a Group-2 element in a periodic table selected from the group consisting of Ca, Sr, and Ba, or a lanthanoid, and that is different from A, n satisfies 0<n<1, y satisfies 0<y<1, m satisfies 0?m<1, and n+y=1. The composite oxide includes a solid solution that is a tetragonal crystal or a cubic crystal, and a ratio of a value (D.sub.ads) of a dispersion degree of the transition metal obtained by an H.sub.2 pulse chemical adsorption method to a value (D.sub.TEM) of the dispersion degree predicted from an average particle diameter of particles of the transition metal obtained from a TEM image satisfies 0<D.sub.ads/D.sub.TEM<1.

The present specification relates to composite metal oxide particles manufactured by reacting two or more metal oxides and a method for manufacturing the same.

A superconducting wire includes a multilayer stack and a covering layer (stabilizing layer or protective layer). The multilayer stack includes a substrate having a main surface and a superconducting material layer formed on the main surface. The covering layer (stabilizing layer or protective layer) is disposed on at least the superconducting material layer. A front surface portion of the covering layer (stabilizing layer or protective layer) located on the superconducting material layer (front surface portion of the stabilizing layer or upper surface of the protective layer) has a concave shape.

One-step solution combustion synthesis (SCS) methods for fabricating durable crystalline transuranic-doped rare earth zirconium pyrochlores are described. Methods are fast, amenable to upscaling, and present a simple strategy for producing crystalline ceramic materials that meet the minimum attractiveness criteria for special nuclear material. The methods include analysis of reactants and reaction conditions to select proper fuel as well as proper fuel content so as to encourage formation of the crystalline product in a single-step synthesis procedure.

This invention relates to azirconium hydroxideor zirconium oxide comprising, on an oxide basis, up to 30 wt % of a dopant comprising one or more of silicon, sulphate, phosphate, tungsten, niobium, aluminium, molybdenum, titanium or tin, and having acid sites, wherein the majority of the acid sites are Lewis acid sites. In addition, the invention relates to a catalyst, catalyst support or precursor, binder, functional binder, coating or sorbent comprising the zirconium hydroxide or zirconium oxide. The invention also relates to a process for preparing zirconium hydroxide, the process comprising the steps of:(a) dissolving a zirconium salt in an aqueous acid, (b) addingone or more complexing agents to the resulting solution or sol, the one or more complexing agents being an organic compound comprising at least one of the following functional groups: an amine, an organosulphate, a sulphonate, a hydroxyl, an ether or a carboxylic acid group, (c) heating the solution or sol formed in step (b), (d) adding a sulphating agent, and (e) adding a base to form a zirconium hydroxide, and (f) optionally adding a dopant.