An oxide superconducting bulk magnet able to prevent breakage of a superconducting bulk member and able to give a sufficient amount of total magnetic flux at a superconducting bulk member surface even under high magnetic field strength conditions, comprising an oxide superconducting bulk laminate formed from sheet-shaped oxide superconducting bulk members and high strength reinforcing members arranged between the stacked oxide superconducting bulk members, the outer circumference of the oxide superconducting bulk laminate being provided with an outer circumference reinforcing member.

A method for preparing a γ-Ga.sub.2O.sub.3 nanomaterial, comprising a step of treating a mixture comprising a gallium element, water, and an organic solvent with ultrasound. The preparation process and equipment requirements are simple, the cost of materials is low, there are fewer experimental parameters, and experimental conditions are mild, with no additional heat source and/or pressure being applied. The γ-Ga.sub.2O.sub.3 nanomaterial can be prepared, in kilograms or above, quickly at an ambient temperature and pressure.

A method for preparing a γ-Ga.sub.2O.sub.3 nanomaterial, comprising a step of treating a mixture comprising a gallium element, water, and an organic solvent with ultrasound. The preparation process and equipment requirements are simple, the cost of materials is low, there are fewer experimental parameters, and experimental conditions are mild, with no additional heat source and/or pressure being applied. The γ-Ga.sub.2O.sub.3 nanomaterial can be prepared, in kilograms or above, quickly at an ambient temperature and pressure.

A superconducting bulk magnet comprising a plurality of superconducting bulk materials combined, in which breakage of superconducting bulk materials is prevented and a strong magnetic field can be generated, that is, a superconducting bulk magnet comprising a plurality of superconducting bulk materials, each comprising a single-crystal formed RE.sub.1Ba.sub.2Cu.sub.3O.sub.y (RE is one or more elements selected from Y or rare earth elements, where 6.8≦y≦7.1) in which RE.sub.2BaCuO.sub.5 is dispersed and each provided with a top surface, a bottom surface, and side surfaces, combined together, in which superconducting bulk magnet, bulk material units, each comprising a superconducting bulk material and a bulk material reinforcing member arranged so as to cover a side surface of the same, are arranged facing the same direction and contacting each other to form an assembly, a side surface of the assembly is covered by an assembly side surface reinforcing member, a top surface and bottom surface of the assembly are respectively covered by an assembly top reinforcing member and an assembly bottom reinforcing member, and the assembly side surface reinforcing member, the assembly top reinforcing member, and the assembly bottom reinforcing member are joined into an integral unit, is provided.

An oxide superconductor has a composition expressed by RE.sub.aBa.sub.bCu.sub.3O.sub.7-x, where RE represents one rare earth or a combination of two or more of a rare earth, a satisfies 1.05≦a≦1.35, b satisfies 1.80≦b≦2.05, and x represents an amount of oxygen deficiency, and a non-superconducting phase having an outer diameter of 30 nm or less is included in a superconducting phase.

The present disclosure provides a method of separating Mo-99 from W-187 from a solution comprising Mo-99 and W-187. The method comprises contacting a tridentate diglycolanude ligand with a solution comprising Mo-99 and W-187 and eluting W-187 from the tridentate diglycolanude ligand to thereby an eluate comprising W-187.

The following two problems arise when carbon is added to a starting material powder in the process of production of an MgB.sub.2 superconductor: (1) an impurity phase increases; and (2) the degree of substitution of carbon at boron sites is spatially non-uniform. This superconductor production method comprises: a mixing step of mixing a starting material powder and an additive; and a heat treatment step of heat-treating the mixture prepared in the mixing step. The starting material powder is MgB.sub.2 powder or a mixed powder of magnesium and boron, and the additive is an Mg—B—C compound containing three elements of magnesium, boron and carbon.

Provided are: a superconducting wire rod in which the non-uniform deformation of the shape of an MgB.sub.2 core material has been controlled; a superconducting coil; a magnetic generator; and a method for producing a superconducting wire rod. A superconducting wire rod (100A) according to the present invention comprises: a center material (106) of which at least the outer circumferential surface is formed of a metal that does not react with Mg; a plurality of single-core wires (103) disposed around the center material (106), each of the single-core wires having an MgB.sub.2 superconductor core material (101) coated with a first coating material (102) made of a metal that does not react with Mg; and an outer shell material (105) disposed outside the plurality of single-core wires (103), wherein at least the inner circumferential surface of the outer shell material (105) is formed of a metal that does not react with Mg.

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.

This application pertains to methods of recovering metals from metal sulfides that involve contacting the metal sulfide with an acidic sulfate solution containing ferric sulfate and a reagent that has a thiocarbonyl functional group, wherein the concentration of reagent in the acidic sulfate solution is sufficient to increase the rate of metal ion extraction relative to an acidic sulfate solution that does not contain the reagent, to produce a pregnant solution containing the metal ions.