5results about How to "Large atomic number" patented technology

The invention relates to a thermoplastic composite material capable of absorbing X-rays and a preparation method thereof, and belongs to the technical field of high polymer materials, X-ray shielding materials such as nano Gd2O3 and Bi2O3 are modified by using a silane coupling agent, and the compatibility and dispersity of the X-ray shielding materials with thermoplastic matrixes such as high molecular weight polyethylene are enhanced through a chemical bonding effect. Meanwhile, modified graphene and sodium humate components are introduced, and a two-dimensional structure of graphene and a functional group of sodium humate interact with the nano shielding material and a matrix, so that the dispersity and the interface bonding force of the material are further improved. The preparation method has the advantages that effective dispersion and stabilization of the refined nanometer shielding material are realized, the composite material is guaranteed to keep a high shielding effect, meanwhile, the composite material has excellent mechanical properties and lightweight design, and a new thought and approach are provided for developing an efficient, lightweight and stable X-ray shielding material.

The utility model provides a reflection type micro-focus X-ray source composite target material, which comprises a support frame and a base material, the base material is sleeved with a first inner cavity of the support frame to form matching, the base material is provided with a second inner cavity, the side wall of the support frame is provided with a water outlet hole, and cooling water can enter the first inner cavity from the second inner cavity and then is discharged from the water outlet hole; a target material body is arranged on the top of the supporting frame. A layer of diamond is deposited and grown on the upper surface of the target material body, tungsten is sputtered on the outer surface of the diamond, the tungsten is high in melting point, low in steam pressure and high in atomic number, and melting can be prevented even under high heat flux.

This application discloses a method for preparing radiation-shielding mortar based on lead-zinc tailings. By crushing and density sorting lead-zinc tailings containing barite, the synergistic effect of high-density and low-density components is rationally utilized. On this basis, functional components such as rare earth tungsten composite oxide powder, boron-containing zirconium complex modifier, calcium aluminate, quasi-crystalline rare earth silicate powder, and graphene oxide dispersion are introduced to construct a radiation-shielding mortar system with high density, multi-energy-level radiation absorption capacity, and excellent mechanical properties. This effectively improves the mortar's attenuation capacity for various types of radiation such as gamma rays and neutron rays. At the same time, the quasi-crystalline structure and the micro-enhancing effect of graphene oxide significantly reduce the internal porosity of the material and improve the interfacial bonding state. Thus, while realizing the high-value utilization of lead-zinc tailings resources, it overcomes the problems of insufficient radiation shielding efficiency, difficulty in balancing mechanical properties and durability, and low level of industrial solid waste utilization in existing radiation-shielding mortars.

This invention relates to an EPDM-based crosslinked rubber material and its preparation method. The rubber material is obtained by vulcanizing raw rubber composed of EPDM rubber, maleic anhydride-grafted polyethylene, a peroxide vulcanizing agent, ethylene glycol dimethacrylate, p-benzoquinone dioxime, lead metal oxide, paraffin oil, a silane coupling agent, and an antioxidant. The EPDM-based crosslinked rubber material obtained by this invention has a double crosslinked structure. The formulation system endows EPDM rubber with excellent physical and mechanical properties, electrical insulation properties, and aging resistance, while also possessing good injection molding performance. This material solves the problems of high prices and long procurement cycles associated with imported finished products, providing an efficient and economical solution for the production of cable accessories.

The present invention discloses an organic-inorganic hybrid reinforced neutron and gamma-ray composite shielding structural material, and relates to the field of composite shielding materials for nuclear radiation protection and preparation methods thereof. The neutron and gamma-ray composite structural shielding material refers to a composite material formed by casting or hot pressing in a certain mass ratio in the presence of a polymer resin and an auxiliary agent, comprising bamboo fiber containing an organic component, glass fiber containing an inorganic component, and an organic-inorganic hybridized rare earth metal organic framework material. The porosity and organic-inorganic hybrid characteristics of the rare earth metal organic framework material increase the compatibility between the components, so that the synthesized composite material has a higher rare earth metal content and dispersibility, and has higher mechanical properties, and has both neutron shielding and gamma-ray shielding capabilities.