6results about How to "Improve radiation stability" patented technology

This application discloses a crystal, a rare-earth-doped crystal, its preparation method, and its applications, belonging to the field of crystal materials. The chemical formula of the crystal is [Gd(L)]. 1.5 (DMA)] n Formula I; in Formula I, L is a ligand formed by deprotonated benzene polycarboxylic acid; benzene polycarboxylic acid is selected from any one of terephthalic acid, phthalic acid, and isophthalic acid; DMA is N , N -Dimethylacetamide; n ∞ represents continuous repetition and infinite extension. The crystal is rare-earth doped, and the chemical formula of the rare-earth doped crystal is [Gd]. 1‑x% (L) 1.5 (DMA)] n :x% Ln 3+ Equation II; in Equation II, x = 0.1~10; Ln 3+ Selected from Tb 3+ Or Eu 3+ Any one of the following. It has potential application value in fields such as fluorescent materials, multicolor display materials, long afterglow materials, X-ray detection and imaging materials, radiation detection dosimeters, and optical information encryption. The preparation method used in this application can be easily achieved through solution reaction under relatively mild conditions, with low cost and strong industrial feasibility.

The application relates to the technical field of photoelectric materials and scintillators, and particularly discloses an ionic rare earth complex scintillator glass, a low-temperature melting preparation method thereof and application. The low-temperature melting quenching process is developed, the crystalline ionic europium complex is directly melted and rapidly cooled under the condition of no solvent, and the direct preparation of the ionic rare earth complex transparent scintillator glass is realized. The prepared glass scintillator material has high transparency, high luminous efficiency, high rare earth content and excellent processability, and fundamentally eliminates the light scattering caused by particle agglomeration and phase separation in the traditional composite thin film, and breaks through the concentration quenching limitation. The glass scintillator material shows excellent luminous performance under X-ray excitation, and can significantly improve the imaging resolution and detection sensitivity. The application provides a feasible technical path for the development of a new type of rare earth scintillator material, and has important application prospects in the fields of medical imaging, nondestructive testing and high-energy radiation detection.

This invention relates to a staggered covalent organic framework thin film, its preparation method, and its application, belonging to the field of thin film technology. The invention first dissolves an amine monomer in acetic acid solution to obtain an aqueous solution; then dissolves an aldehyde monomer in mesitylene to obtain an organic solution; finally, the aqueous and organic solutions are added to the aqueous and organic phase chambers of a diffusion cell, respectively, for interfacial polymerization. After the reaction, the membrane material is removed, washed, and dried to obtain the staggered covalent organic framework thin film. This film forms a staggered stacked structure and constructs sub-nanometer transport channels with pore sizes of approximately 0.5 nm to 0.7 nm. Through a synergistic mechanism of Donnan repulsion and hydrogen bonding interactions, it maintains structural stability under extreme environments of high acidity, strong corrosion, and high radiation, achieving highly efficient selective permeation of protons and efficient retention of metal ions in high-level radioactive waste liquids.

The application relates to a phosphoric acid derivative modified resin and a preparation method thereof, and comprises the following steps: S1, mixing styrene, divinylbenzene, benzoyl peroxide, isooctane, polyvinyl alcohol and water, stirring to form a ball, and reacting at high temperature to obtain resin white balls; S2, mixing and swelling the resin white balls with dichloroethane, adding chloromethyl ether and ZnCl2 to react to obtain resin chloro balls; S3, mixing and swelling the resin chloro balls with butyl phthalate, adding hexamethylenetetramine to react, and adjusting the pH to alkaline to obtain resin amine balls; S4, mixing and swelling the resin amine balls with disodium ethylenediaminetetraacetate, adding formaldehyde, monobutyl phosphoric acid and concentrated hydrochloric acid to react to obtain alpha interception resin, i.e. the phosphoric acid derivative modified resin. Compared with the prior art, the alpha interception resin prepared by the application has a plutonium adsorption capacity of greater than 0.20 mmol / g in 5-8 mol / L nitric acid waste liquid, a distribution coefficient of greater than 1000, and high-efficiency plutonium recovery.

The application belongs to the technical field of electromagnetic radiation, and particularly provides a full-metal antenna unit and an array thereof capable of switching left-handed and right-handed circular polarization, wherein, in the antenna unit, four identical linear polarization antenna array elements are sequentially arranged by rotation, and the radiation and switching of the antenna unit to left-handed and right-handed circularly polarized waves are conveniently realized by applying specific excitation phase differences to the four linear polarization antenna array elements. Further, in the full-metal antenna unit, the single-point feeding metal feeding probe adopted by each linear polarization antenna array element and the symmetrical structure of the two metal prisms adhering to the right-angle edges of the metal ground plate guarantee the stability and reliability of the phase adjustment of the linear polarization wave orthogonal components; meanwhile, the full-metal structure of the entire antenna unit improves the environmental interference resistance of the antenna unit and further reduces the processing difficulty and production cost.

The application discloses a lanthanide-actinide heterometallic coordination polymer material and a preparation method and application thereof, and belongs to the technical field of metal organic polymer materials. 2+ The lanthanide-actinide heterometallic coordination polymer material is prepared through precise integration in a one-dimensional structure. The preparation method is simple in operation and easy to realize repeated preparation. The prepared lanthanide-actinide heterometallic coordination polymer material has both characteristic luminescence of lanthanide elements and structure guiding characteristics of actinide ions, is highly ordered in structure and has excellent radiation stability. Compared with other scintillators, the prepared lanthanide-actinide heterometallic coordination polymer material has sensitive scintillation response to X rays, high light output and excellent energy resolution, and has great potential in X ray imaging.