7 results about "Cerium(III) oxide" patented technology

The invention relates to the technical field of high-temperature metal protection, in particular to a reinforced rhenium strip and a preparation method and application thereof. The invention provides a reinforced rhenium strip. The reinforced rhenium strip comprises a rhenium strip and a zirconium oxide doped dicerium trioxide coating loaded on the surface of the rhenium strip, based on the weight of the zirconium oxide doped cerium sesquioxide coating, the content of the cerium sesquioxide is 1-5wt%. According to the invention, the compact high-temperature-resistant and antioxidant metal coating is loaded on the surface of the rhenium strip to protect rhenium, so that the rhenium is not easily damaged by oxidation; and the metal coating is compact, not prone to cracking and stripping, high in thermal shock resistance, high in abrasion resistance and long in service life, and the obtained reinforced rhenium strip can be used as a high-temperature-resistant structural part and the like.

The application belongs to the technical field of electronic ceramic materials, and particularly relates to a high-performance composite material for a phase shifter and a preparation method thereof. The high-performance composite material for the phase shifter is prepared by using regenerated iron oxide obtained by sequentially performing high-temperature roasting and alkali treatment on iron oxide waste, doping treatment of the regenerated iron oxide with cerium oxide, and then mixing the regenerated iron oxide with lithium carbonate, zinc oxide, titanium dioxide, trimanganese tetroxide, bismuth trioxide and an additive, so that the dielectric loss is effectively reduced, and the ferromagnetic resonance line width is narrowed.

The application discloses a preparation method of a metal / cerium dioxide monatomic catalyst, which comprises the following steps: mixing an inorganic alkali solution and a cerium nitrate solution to perform hydrolysis, and then performing centrifugation, washing and drying to obtain Ce(OH)3; uniformly dispersing the Ce(OH)3 in a metal salt solution, and then performing stirring, centrifugation, washing and freeze-drying to obtain a metal precursor / cerium hydroxide; and performing a decomposition reaction on the cerium hydroxide under an inert gas to obtain a metal monatomic / cerium dioxide. 3+ The Ce on the surface of the cerium dioxide in the process is subjected to electron transfer with the adsorbed metal ions, and the metal ions are reduced; and then the metal / cerium dioxide monatomic catalyst is obtained by placing in air. The cerium dioxide is used as a carrier precursor, the metal monatomic is in-situ loaded on the cerium dioxide nanostructure through the electron transfer effect between the cerium dioxide and the metal ions, and a reducing agent is not additionally added, so that the preparation process is simple and mild, and the method has good controllability and industrial application prospect.

The invention belongs to the technical field of electronic ceramic materials, and particularly relates to a high-performance composite material for a phase shifter and a preparation method of the high-performance composite material. The high-performance composite material for the phase shifter is prepared by sequentially performing high-temperature roasting and alkali liquor treatment on the iron oxide waste, performing doping treatment in cooperation with the dicerium trioxide to obtain regenerated iron oxide, and then jointly preparing the regenerated iron oxide, the lithium carbonate, the zinc oxide, the titanium dioxide, the manganous-manganic oxide, the bismuth trioxide and the additive, so that the dielectric loss is effectively reduced, and the performance of the phase shifter is improved. And the ferromagnetic resonance line width is narrowed.

The present application relates to an electronic cigarette using electromagnetic heating, comprising a filter assembly, a heating assembly connected to the filter assembly, and a bare cartridge, the bare cartridge being formed by extrusion molding of a porous carrier material, a mixed powder, a tobacco extract mixture, a particle aggregation inhibitor, a binder, and metal composite magnetic conductor particles, the metal composite magnetic conductor particles being uniformly distributed in the bare cartridge; a control circuit board is used to control an electromagnetic induction coil to generate an alternating magnetic field according to a predetermined heating power formula, the metal composite magnetic conductor particles are used to cut the alternating magnetic field lines of the alternating magnetic field in the alternating magnetic field to generate alternating current eddy currents inside the metal composite magnetic conductor particles, the current eddy currents cause the metal composite magnetic conductor particles to generate heat so that the bare cartridge releases smoke; wherein the metal composite magnetic conductor particles are formed by sintering of manganese-zinc ferrite doped with cerium sesquioxide, ytterbium sesquioxide, and vanadium pentoxide, and aluminum-doped molybdenum disilicide powder.

The present invention discloses a tungsten alloy material, comprising the following raw materials in parts by weight: 90-95 parts of tungsten powder, 3-6 parts of copper powder, 1-3 parts of nickel powder, 1-2 parts of modified cerium oxide, 65-75 parts of treatment modification liquid, and 2-5 parts of pure praseodymium powder. The tungsten alloy of the present invention uses tungsten powder, copper powder, modified cerium oxide, and pure praseodymium powder as raw materials. After the cerium oxide is modified and optimized, the raw materials are coordinated to enhance the interfacial property between the raw materials, improve the strength-toughness ratio of the product. At the same time, the treatment modification liquid is formed by mixing bentonite with additives, and the formed treatment liquid modifies and improves the alloy surface, enhancing the interfacial activity of the alloy. In the subsequent secondary heat treatment, the microparticles further shrink and compact, improving the processing performance, enhancing densification, and reducing internal defects.

The invention provides a composite deoxidizer as well as a preparation method and application thereof, and belongs to the technical field of smelting. The composite deoxidizer provided by the invention comprises the following components in percentage by mass: 30-45% of Fe, 5-20% of Fe, 10-25% of CaF, 5-8% of CaO and 6-17% of an auxiliary agent, and the auxiliary agent comprises Ce2O3 and Mg. According to the invention, rare earth oxide dicerium trioxide and Mg are added and can play a synergistic role, so that the deoxidization effect is further improved; by adjusting the component proportion of the composite deoxidizer, the deoxidizing effect of the composite deoxidizer can be improved.