7 results about "Misch metal" patented technology

The present application relates to the technical field of VOCs treatment, and provides a manganese-based rare earth metal catalyst, a preparation method and application thereof, the manganese-based rare earth metal catalyst comprises a metal oxide, the molecular formula of the metal oxide is RMn2O5, wherein R is a rare earth metal element; and the preparation method comprises the following steps: (1) mixing a rare earth metal salt, a manganese salt and an oxidizing agent, performing a first stirring oxidation reaction to obtain a first system; (2) mixing an alkaline substance and the first system, and sequentially performing a second stirring reaction and a hydrothermal reaction to obtain a post-reaction material containing the manganese-based rare earth metal catalyst. In the present application, the RMn2O5 catalyst improves the stability of the catalyst and has high catalytic activity, and has a wide application prospect.

The invention relates to the technical field of magnetic functional materials, in particular to a light rare earth Pr-based ultrahigh magnetostrictive material and a preparation method thereof. The light rare earth Pr-based ultrahigh magnetostrictive material comprises the following raw materials in parts by weight: 20-35 parts of praseodymium-neodymium misch metal, 60-75 parts of pure iron, 3-8 parts of metal cobalt, 0.5-2 parts of metal niobium, 0.1-0.5 part of an additive A and 0.5-2 parts of an additive B. The additive A is enriched at a grain boundary; the additive B is used for improving the combination state between the rare earth phase and the ferromagnetic matrix, the directional rotation process of the magnetic domain under the external magnetic field is promoted, and the magnetic field is improved. The effects are combined with the inherent strong magnetocrystalline anisotropy of the Pr element and specific hydrogen decrepitation and magnetic field orientation hot pressing processes, and the magnetostriction strain and driving capacity of the material are synergistically enhanced.

The invention discloses an ultrahigh-strength high-conductivity steel-cored aluminum stranded wire and a preparation method thereof, and relates to the technical field of cables. Comprising a plurality of steel wires and a plurality of aluminum wires which are concentrically stranded, the steel wires are high-carbon steel doped with chromium, manganese, erbium, molybdenum and yttrium, zinc-aluminum-magnesium rare earth alloy coatings are arranged on the surfaces of the steel wires, and the aluminum wires are aluminum alloy doped with mixed rare earth metal of yttrium, iron, silicon, lanthanum and cerium; and laser cladding treatment is carried out between the intertwisted steel core and the interface of the aluminum stranded wire. The steel wire is made of alloyed high-carbon steel, meanwhile, the zinc-aluminum-magnesium rare earth alloy coating is arranged on the surface, the tensile strength of the steel wire is greatly improved, the stress relaxation rate is remarkably reduced, the aluminum wire is doped with rare earth metal, high conductivity and heat resistance are achieved through accurate alloy component design, and the surface strength of the aluminum wire is improved by combining interface laser cladding treatment. The corrosion resistance and the interface bonding strength are improved, the wire can adapt to severe environments such as high temperature, high humidity, strong corrosion and the like, the stretching resistance and the fatigue resistance of the wire during erection and operation are effectively enhanced, and the service life is prolonged.

The application relates to the technical field of magnetic functional materials, in particular to a light rare earth Pr-based ultrahigh magnetostrictive material and a preparation method thereof. The material is prepared from the following raw materials in parts by weight: 20-35 parts of praseodymium-neodymium mixed rare earth metal, 60-75 parts of pure iron, 3-8 parts of metal cobalt, 0.5-2 parts of metal niobium, 0.1-0.5 parts of additive A and 0.5-2 parts of additive B. The additive A is enriched at the grain boundaries, hinders the coarsening of the grains in the processing process, thereby obtaining fine grain structures, and provides an optimized microstructure basis for the magnetostrictive performance. Meanwhile, the additive B is used to improve the bonding state between the rare earth phase and the ferromagnetic matrix, and promotes the directional rotation process of the magnetic domains under the external magnetic field. The effects are combined with the inherent strong magnetic crystal anisotropy of the Pr element and the specific hydrogen crushing and magnetic field orientation hot-pressing process, and the magnetostrictive strain and driving capacity of the material are synergistically enhanced.

The present invention relates to a method for the preparation of mixed rare earth metal carbonates from monazite, this method comprising a first leaching with an alkaline hydroxide and a two-step second leaching in the presence of hydrochloric acid.

The present disclosure provides an aluminum alloy composition comprising a rare earth metal, such as Ce, La, or misch metal, Zn, and Mg, suitable for high pressure die casting, which can be heat treated to achieve increased strength compared to existing Al alloys cast by high pressure die casting (HPDC). The alloy also allows a solution treatment step to be omitted in heat treatment of castings made by gravity die casting (GDC) or low pressure die casting (LPDC) to reduce greenhouse gas emissions as well as process costs and processing steps and time while obtaining higher hardness, tensile strength and yield strength.