4results about How to "Low preparation temperature" patented technology

The application provides an amorphous iron nitride sulfide thin film positive electrode material, a preparation method thereof and a thin film lithium battery containing the same. The positive electrode material uses nitrogen atoms to replace part of sulfur atoms in amorphous ferrous sulfide to form amorphous iron nitride sulfide, and the atomic ratio of iron, sulfur and nitrogen in the iron nitride sulfide is 1:(0.3-0.6):(0.3-0.6). The amorphous structure of the iron nitride sulfide can avoid the volume expansion of the crystalline material caused by lattice distortion; and the presence of nitrogen atoms can effectively inhibit the shuttle effect of polysulfides generated in the cycle process, so that the positive electrode thin film can be more firm, the diffusion of the active material into the electrolyte can be avoided, and the capacity and cycle life of the battery can be improved. The preparation method is simple, and the obtained iron nitride sulfide positive electrode material has the advantages of good conductivity, fast growth speed, high specific capacity, long cycle life, low preparation temperature and the like.

The invention discloses a rare earth Er low-temperature modified amorphous alumina hydrogen / deuterium / tritium resistant coating and a preparation method thereof. The coating comprises a metal substrate and an Er low-temperature modified amorphous alumina coating covering the metal substrate. The preparation method comprises the following steps: pre-treating the metal substrate; preparing Er modified amorphous alumina sol containing an aluminum source and erbium salt through a sol-gel process; a coating prefabricated layer is formed on a substrate through a coating technology, organic matter is removed through low-temperature heat treatment, and the coating is obtained. According to the coating, Er-O bonds and interface hydrogen blocking traps are formed through solid solution and nanocrystalline precipitation of Er in an amorphous aluminum oxide network, and the barrier property is remarkably improved. Experiments show that when the Er modification proportion is 10%, the deuterium permeation barrier factor PRF of the coating reaches 2407, and the permeability of the coating is reduced by about three orders of magnitude compared with that of a stainless steel matrix. The method is simple in process, low in preparation temperature, excellent in hydrogen resistance and suitable for the fields of nuclear energy, hydrogen energy and the like.

This invention discloses a high-performance wrought magnesium-lithium alloy, comprising the following components by mass percentage: Li 4.8%~5.3%, Zn 5.7%~6.2%, Y 1.8%~2.3%, with the balance being Mg. The alloy is prepared as follows: 1. Raw materials of each component are taken according to the mass percentage of the target magnesium-lithium alloy, and smelted and cast to obtain a magnesium-lithium alloy ingot; 2. The magnesium-lithium alloy ingot is subjected to homogenization heat treatment; 3. After low-temperature preheating, it is subjected to low-temperature extrusion and cooled to room temperature. The magnesium-lithium alloy of this invention, by adding Zn and Y elements, introduces a network W phase, MgZn phase, and MgY phase as reinforcing phases to strengthen the alloy. Combined with the homogenization heat treatment followed by low-temperature extrusion deformation in the preparation process, cold forming capability is increased, and the second phase is effectively broken up, synergistically improving the strength and plastic mechanical properties of the magnesium-lithium alloy, making it suitable for aerospace and other fields.

The invention belongs to the technical field of high radioactive waste treatment, and relates to a high-entropy ferrite rare earth based perovskite ceramic solidified body and a preparation method and application thereof.The general formula of the solidified body is A1 / n (FexBy) O3, n represents the number of element types of the A lattice site of the high-entropy A1 / n (FexBy) O3 ferrite rare earth based perovskite ceramic solidified body, n is an integer and is larger than or equal to 3 and smaller than or equal to 7, and the A element types include Bi, Sc, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Y, Ho, Er, Tm, Yb and Lu; m is at least three of transition metal elements including Cr, Mn, Co, Ni, Al, Ti, Zr, Hf, Nb, Ta and Ce, x is equal to 0.01 to 1.00, and x is equal to 0 to 0.99. According to the method, a high-entropy strategy is introduced into the ferrite rare earth perovskite ceramic solidified body, the ceramic solidified body not only can solidify various key high-radionuclides, but also has excellent chemical stability, low leaching rate and low preparation temperature, and the disadvantage that ceramic solidified nuclides are high in selectivity and single is effectively avoided. Due to the excellent performance of the ceramic solidified body, the ceramic solidified body has great application potential in the field of solidification treatment of high-radioactivity nuclear waste of a spent fuel reprocessing plant.