39results about How to "Large lattice distortion" patented technology

The present invention discloses a tellurium-doped MXene composite material and a preparation method thereof, comprising the following steps: (1) adding MXene and a tellurium source into a dispersant to prepare a dispersion, and then stirring the dispersion; (2) heating the dispersion, reacting, and then cooling; (3) centrifuging the product obtained in the step (2), then washing and drying under vacuum; and (4) placing the dry product obtained in the step (3) into a corundum ark, and then transferring into a tubular furnace, heating under the protection of inert gas, retaining the temperature, and then cooling to obtain the tellurium-doped MXene composite material. The composite material prepared by the present invention can be used as a cathode of a potassium ion battery, which increases the interlamellar spacing, and optimizes an ion diffusion channel, so that the electrochemical performance of the potassium ion battery is improved.

The invention discloses REO (rare earth oxide)-doped GZ (gadolinium zirconate) powder for PS-PVD (plasma spray physical vapor deposition) and a preparation method of the REO-doped GZ powder, and relates to the technical field of processing of GZ ceramic materials. The method comprises the following steps: gadolinium salt, zirconium salt and one of ytterbium salt or scandium salt are mixed uniformly in the mole ratio of (0.3-0.9):1:(0.1-0.7), deionized water is added, a mixed solution is obtained and subjected to single-phase sedimentation treatment, filtering and drying are performed, and a solid product is obtained; wet ball milling and dry ball milling are performed on the solid product sequentially, a ball milling product is filtered, a product is dried and then subjected to ball milling and uniform mixing with deionized water, a binder and a dispersant, and slurry is obtained; pH of the slurry is regulated, spray drying is performed, and granules are obtained; the granules are sintered in a sintering furnace, powder with diameter smaller than 18 mu m and larger than 50 mu m is screened out, fine powder and coarse powder are mixed uniformly, and the REO-doped GZ powder for PS-PVD is obtained. Flowability of the fine powder is improved while the gasification effect of the powder is guaranteed.

The invention discloses a method of regulating performance of a CoCrFeNiCu high-entropy alloy. The method is characterized by comprising the following steps: smelting raw materials Co, Cr, Fe, Ni andCu in equal molar weight with elements in a crucible by means of a smelting method, and smelting the melt at a high temperature continuously for no less than 10min; stretching a pulse electrode into the melt stopped in heating, and processing the pulse electrode for 30-90s with pulse, the voltage of which is not smaller than 100V and the frequency of which is not smaller than 5Hz, to obtain a CoCrFeNiCu high-entropy alloy; and naturally cooling the CoCrFeNiCu high-entropy alloy to room temperature and taking out a cast ingot from the crucible to obtain a CoCrFeNiCu high-entropy alloy cast ingot. According to the method disclosed by the invention, an electric pulse treatment method is applied to a preparation process of the high-entropy alloy to prepare the high hardness and high strength alloy, the yield strength of which is improved by about 233.3% and the breaking strength of which is improved by about 18.4%; and meanwhile, the invention provides a regulating method which is small inenergy consumption, low in cost, simple to operate or short in treatment period and can regulate the performance of the alloy.