9 results about "Tantalum compound" patented technology

The application provides a composite carbon material and a preparation method thereof, and the preparation method at least comprises the following steps: providing a carbon base; mixing a tantalum-containing compound with an organic solvent to obtain a tantalum-containing slurry; uniformly covering the tantalum-containing slurry on the surface of the carbon base to obtain a reaction layer on the carbon base; uniformly covering tantalum powder on the reaction layer to obtain a tantalum metal coating layer on the reaction layer; heating the carbon base with the tantalum metal coating layer to a preset temperature under a vacuum state, and keeping the temperature for a preset time; and cooling the heated carbon base to room temperature to obtain the composite carbon material. Through the composite carbon material and the preparation method thereof, the compactness and quality of the tantalum carbide coating layer can be improved.

The invention provides a ternary positive electrode material with a tantalum-phosphorus coating layer as well as a preparation method and application of the ternary positive electrode material. The ternary positive electrode material comprises a high-nickel ternary material core and the tantalum-phosphorus coating layer coating the exterior of the high-nickel ternary material core, and the tantalum-phosphorus coating layer comprises the following components: a tantalum compound, a phosphorus compound and a fast ion conductor Li3PO4. In the ternary positive electrode material, a tantalum-phosphorus coating layer with crack resistance, high ionic conductivity and excellent stability is constructed through synergistic interface modification of a tantalum-containing component and a phosphorus-containing component, and dual functions are synchronously realized: 1, the tantalum-containing component strengthens the near-surface mechanical strength by virtue of a strong Ta-O bond; secondly, residual lithium is converted by utilizing a phosphorus component, a fast ion conductor Li3PO4 is generated in situ, and a fast lithium ion transmission channel is constructed; the high-nickel ternary lithium battery prepared from the ternary positive electrode material shows excellent cycle performance and rate capability under severe working conditions, and is suitable for improving the energy density of the battery in the prior art.

A dielectric of the present disclosure includes a tantalum compound containing fluorine and oxygen and being amorphous, and is advantageous in terms of achieving a high dielectric constant.

A dielectric of the present disclosure includes a tantalum compound containing fluorine and oxygen and being amorphous, and is advantageous in terms of achieving a high dielectric constant.

A dielectric 10 includes a tantalum compound containing fluorine and oxygen. The tantalum compound satisfies the conditions of 0 < x < 2.5 and 0.08 < y ≤ 0.2. x is the ratio of the number of oxygen atoms to the number of tantalum atoms in the tantalum compound. y is the ratio of the number of fluorine atoms to the number of tantalum atoms in the tantalum compound.

The invention discloses a preparation method of tantalum-doped barium bismuthate tungstate with an X-ray absorption function. The preparation method comprises the following steps: preparing the following raw materials in molar mass: 0.2 to 0.5 mol of bismuth compound, 0.2 to 0.5 mol of tantalum compound, 0.1 to 0.2 mol of barium salt and 0.1 to 0.2 mol of tungsten compound; the preparation method comprises the following steps: dissolving the raw materials in 500-2000mL of polar solvent, and carrying out hydrothermal reaction; alternately washing the obtained precursor with distilled water and absolute ethyl alcohol to remove impurities, and then carrying out drying treatment; and finally, calcining to finally form the nano powder. The invention provides a preparation method of tantalum-doped barium bismuthate with an X-ray absorption function, solves the problems of a traditional lead-containing protective material, and also has the X-ray absorption function, and the invention also provides an application of the tantalum-doped barium bismuthate with the X-ray absorption function in the X-ray protective material.

The invention relates to the technical field of coating protection, in particular to a tantalum ceramic anticorrosive coating and a preparation method thereof. The anticorrosive coating comprises the following components in parts by weight: 100 parts of epoxy resin, 30-45 parts of a curing agent, 15-30 parts of tantalum compound ceramic, 20-30 parts of silicon powder, 60-80 parts of chromium oxide, 20-40 parts of aluminum triphosphate, 5-10 parts of graphene, 1-3 parts of a defoaming agent and 1-3 parts of a flatting agent. According to the tantalum ceramic anti-corrosion coating, the rare earth tantalate is effectively utilized, meanwhile, the prepared anti-corrosion coating has the high melting point and the good anti-corrosion performance, the coating is compact, corrosion media are effectively prevented from entering the coating, and the overall homogeneity is good.

The invention discloses a chromium ion doped double perovskite structure photoluminescent material and a preparation method and application thereof. The invention aims to provide a novel chromium ion doped double perovskite structure electroluminescent material, the chemical structural formula is Li3Mg2TaO6: xCr < 3 + >, and x is more than 0 and less than or equal to 0.09; the chromium ion doped double perovskite structure photoluminescent material is used for manufacturing night vision monitoring, vein imaging and spectrum detection systems, and rapid and non-contact biological tissue diagnosis is realized; the preparation method comprises the following steps: mixing and grinding a lithium-containing compound, a magnesium-containing compound, a tantalum-containing compound and a chromium-containing compound according to a stoichiometric ratio, pre-sintering in an air atmosphere, grinding a product obtained by pretreatment again, heating to 1200-1400 DEG C in the air atmosphere, and keeping for 6 hours to obtain the chromium ion doped double perovskite structure photoluminescent material. The preparation method is simple to operate and environment-friendly, so that the chromium ion doped double perovskite structure photoluminescent material is easy to prepare on a large scale; belongs to the technical field of inorganic photoluminescent materials.

The application discloses a metal tantalum surface superhard ceramic permeation layer, a preparation method and a metal tantalum material. The metal tantalum substrate is embedded into a permeation agent, and a boron tantalum compound is generated on the surface of the metal tantalum by heat preservation in a vacuum or a protective atmosphere at 1200-1600 DEG C, so that a wear-resistant and corrosion-resistant superhard ceramic phase boride permeation layer is obtained. The permeation layer has excellent comprehensive performance and superhigh surface hardness, and the surface hardness can reach HV1520-HV3200. The thickness of the superhard ceramic permeation layer can be adjusted in the range of 10-100 microns. The bonding strength between the boron permeation layer and the substrate is high, and the bonding force is in the range of 20-35 N. In addition, the permeation layer has superior corrosion resistance, and the corrosion rate in a high-temperature molten cerium is in the range of 0.0630-0.0885 microns / h.