4 results about "YTTERBIUM OXIDE" patented technology

The application discloses a kind of heterostructure supported catalyst and its preparation method and application, belong to catalytic technical field.The heterostructure supported catalyst provided by the application includes Yb oxide base and metal nanoparticles;The metal nanoparticles are loaded in the Yb oxide base;The metal nanoparticles include ruthenium and doped metal;The doped metal includes at least one of cobalt, iron or manganese.The application loads the metal nanoparticles of ruthenium and doped metal in Yb oxide base, constructs metal / oxide heterostructure, induces strong metal-support electron interaction, this interaction can effectively adjust the local electronic structure of active site, realizes the promotion of catalytic performance, so that the catalyst has the advantages of strong binding force, chemical interface stability, higher catalytic activity and stability, etc., can be prepared for good performance used in electrolytic water hydrogen evolution reaction cathode.

The present application relates to the field of environmental barrier coatings or integrated thermal environmental barrier coatings, and particularly relates to a yttrium-holmium-erbium-ytterbium non-equiatomic high-entropy rare earth monosilicate ceramic material and a preparation method thereof. x Ho (1‑x) / 3 Er (1‑x) / 3Yb (1‑x) / 3 )2SiO5, wherein the atomic molar amount x of Y ranges from 0.05 to 0.95. The yttria powder, holmia powder, erbium oxide powder, ytterbia powder and silica powder are used as raw materials, wet mixing is performed, pressureless sintering is performed in an air atmosphere, and then sintering is performed in a hot-pressing furnace with a protective atmosphere, so that the high-entropy rare earth monosilicate ceramic material with high purity and excellent high-temperature thermal physical properties is obtained.

The application relates to the technical field of steel materials, in particular to a high-wear-resistance steel material for a pipe mold and a preparation process thereof, which comprises the following preparation steps: step S1: smelting, step S2: casting and heat treatment, and step S3: preparation of the high-wear-resistance steel material for the pipe mold. In the smelting process, an inoculation modifier composed of an Al-Ti-Nb intermediate alloy and a vanadium iron nitride alloy is used, the Al-Ti-Nb intermediate alloy and the vanadium iron nitride alloy can play a mutual synergistic effect, and the strength and toughness of the steel material body can be improved; through high-temperature solid solution treatment at 1030-1040 DEG C and twice tempering treatment at 540-560 DEG C, the toughness of the steel material body is optimized on the basis of maintaining high hardness, the balance between hardness and toughness is realized; in the preparation process of the high-wear-resistance steel material for the pipe mold, laser cladding material mixed by AlCoCrNiTiB alloy powder and nano ytterbium oxide powder is used to perform surface modification on the steel material body, so that the high-wear-resistance steel material for the pipe mold simultaneously has the characteristics of low friction and wear resistance.

This invention discloses an oxygen-doped carbon nitride / ytterbium oxide (OCN / Yb₂O₃) heterojunction photocatalyst, its preparation method, and its applications, belonging to the field of photocatalytic materials technology. The process involves thermally treating a carbapenemhydrazine to obtain the intermediate HTIC; then, HTIC is uniformly mixed with Yb₂O₃ and a water-soluble molten salt, followed by molten salt thermal treatment to obtain the target catalyst OCN / Yb₂O₃. This method is simple, the molten salt can be washed and recovered with water, it is environmentally friendly, and has low cost. The OCN / Yb₂O₃ photocatalyst obtained by this invention exhibits a broad spectral response, high carrier separation and migration efficiency, and excellent all-water splitting activity under visible light, showing broad application prospects.