10 results about "Niobium" patented technology

An insulation film includes niobium, oxygen and a metal element, and the insulation film has a band gap width of larger than 4.2 eV, and at least a portion of the insulation film includes an amorphous structure.

The invention discloses a preparation method of a high-entropy ceramic coating. The method comprises the following steps: firstly, mixing a plurality of single-element compound raw material powder toobtain composite powder, and then mixing a binder into the composite powder to prepare multi-element composite powder for thermal spraying, wherein the single-element compound is carbide, nitride or diboride, and the multiple elements are any five or more of zirconium, titanium, hafnium, tantalum, niobium, vanadium, chromium, molybdenum or tungsten; secondly, pretreating the surface of a substrateof the required coating; and thirdly, spraying the multi-component composite powder on the surface of the substrate by adopting a thermal spraying method so as to form the high-entropy ceramic coating through in-situ synthesis. The high-entropy ceramic coating prepared by the invention has high compactness, hardness, wear resistance, corrosion resistance, high-temperature resistance and oxidationresistance.

The invention discloses high heat input welding resistant building steel and a production method thereof, and belongs to the technical field of steel production. The steel for the building comprises the following chemical components in percentage by mass: 0.05 to 0.18 percent of C, 0.05 to 0.75 percent of Si, 0.65 to 1.75 percent of Mn, 0.003 to 0.02 percent of P, 0.001 to 0.015 percent of S, 0.005 to 0.075 percent of Al, 0.01 to 0.05 percent of Nb, 0.01 to 0.07 percent of V, 0.005 to 0.04 percent of Ti, 0.001 to 0.01 percent of Mg + Ca, 0.002 to 0.01 percent of O, 0.005 to 0.015 percent of N and the balance of Fe and residual elements, the contents of V, Ti and N also meet the relational expression: 1.06 [Ti] < 3.64 [N] < [V] + 1.06 [Ti]. Precipitated particles formed by nitrides of titanium, niobium and vanadium and oxides of magnesium and calcium play roles in pinning austenite grains and promoting ferrite nucleation; and by adjusting alloy components and a smelting process, the number and form of various nitrides and oxides are reasonably and effectively controlled, coarse structures generated in the welding heat cycle process are eliminated, and the welding performance of the building steel is improved.

The invention discloses a smelting method for rare-earth microalloyed steel. The smelting method can be used for smelting the rare-earth microalloyed steel. By controlling the temperature, the vacuumdegree and the contents of sulfur, rare earth, oxygen, aluminum and phosphorus, high-precision and high-purity steel which is low in content of impurities and satisfies production requirements is obtained through twice smelting. In a smelting process, original vanadium (niobium, chromium, molybdenum and titanium) alloying elements in molten iron are effectively prevented from being oxidized and burnt, so that follow-up addition of vanadium (niobium, chromium, molybdenum and titanium) is reduced. Besides, the contents of sulfur, phosphorus, oxygen and aluminum in molten iron are reduced beforeadding of rare earth alloy, so that the amount of rare earth alloy which is oxidized and vulcanized is reduced, and the addition of rare earth alloy in steel is effectively reduced. Meanwhile, formation of aluminic acid rare earth, phosphoric acid rare earth or phosphoric rare earth occluded foreign substances is reduced, so that the quality of an end product is improved. By adoption of the smelting method, the smelting cost is lowered, and beneficial effects in smelting rare earth containing vanadium (niobium, vanadium, chromium, molybdenum and titanium) steel are improved.

The invention discloses a high-strength color-sprayed crystalline ceramic glaze and a preparation method thereof. The high-strength ceramic glaze is prepared from the following raw materials in partsby mass: 38-58 parts of feldspar, 12-16 parts of quartz, 10-16 parts of calcite, 5-8 parts of barium carbonate, 7-10 parts of talc, 10-15 parts of silver oxide, 3-6 parts of kaolin, 8-10 parts of titanium oxide, 14-18 parts of zinc oxide, 6-8 parts of aluminum oxide, 1-4 parts of sodium dodecyl benzene sulfonate, 2-5 parts of lanthanum boride, 0.1-1.2 parts of niobium diselenide, and conductive antibacterial powder. The crystalline ceramic glaze has the beneficial effects that the strength performance and the anti-falling capability of a ceramic product can be improved, the practicability of the ceramic product is improved, the glaze smoothness is good, the glaze slip performance is good, the firing range is wide, the product appearance is regular, cleaning is easy, higher aesthetic feeling is generated, consumers have larger use visual senses, and the ceramic product is favored and praised by customers.

The invention discloses a preparation method of a niobium-zirconium 10 alloy tube. The method comprises the following steps: making niobium powder and zirconium sponge into a niobium ingot and a zirconium strip respectively, and welding the niobium ingot and zirconium strip together by use of a niobium wire in a vacuum furnace; performing smelting purification and hydrogenation treatment to obtain niobium-zirconium alloy powder; and performing dehydrogenation treatment and isostatic pressing and sintering to obtain the niobium-zirconium 10 alloy tube. According to the preparation method of a niobium-zirconium 10 alloy tube disclosed by the invention, by making the niobium ingot and zirconium strip into alloy powder and then performing isostatic pressing to obtain the tube, the niobium and zirconium can be sufficiently alloyed without segregation; and moreover, the niobium-zirconium crystal grain has good structural uniformity and is resistant to corrosion and wear, and the service life is prolonged.

The invention relates to the technical field of mineral separation, in particular to a comprehensive utilization method of pegmatite containing tantalum, niobium, cassiterite, feldspar and spodumene. The comprehensive utilization method of the pegmatite comprises the following steps: crushing and grinding raw ore, and then carrying out flotation, magnetic separation, reselection, concentration, dehydration, precipitation and clarification combined mineral separation process, so that valuable mineral resources such as mica, tantalum-niobium ore, cassiterite, feldspar, spodumene, building material sand and the like contained in the pegmatite can be recycled; the method has the advantages that the method is simple in process, high-quality recovery of spodumene concentrate and feldspar concentrate products and the like can be achieved, the comprehensive recovery utilization rate is high, nearly zero emission of tailings and tail water can be achieved, the method is suitable for large-scale production and application, and stable beneficiation indexes can be kept.

The invention provides a material formula for a diamond bit. The material formula is characterized by comprising the following components in part by mass: 60-80 parts of iron powder, 10-15 parts of manganese powder, 3-5 parts of chromium powder, 3-8 parts of nickel powder, 2-6 parts of vanadium powder, 10-15 parts of tungsten powder, 1-2 parts of zirconium powder, 3-5 parts of niobium, 1-5 parts of lead powder, 3-8 parts of nano graphite powder, 1-5 parts of molybdenum disulfide powder, 3-12 parts of silicon dioxide powder, 1-3 parts of magnesia powder and 2-4 parts of crystal water.Accordingto the invention, the optimized alloy steel formula is adopted to manufacture the diamond bit; the diamond bit is low in production cost and higher in tensile strength, yield strength and hardness; aplurality of alloy elements including nickle, vanadium, tungsten and the like are added in the components and are uniformly distributed in the internal structure of alloy steel; and moreover, the lubricating components including nano graphite powder and molybdenum disulfide powder are added, and nano graphite powder and molybdenum disulfide powder reduce brittleness and prolong the service life ofthe diamond bit.