3results about How to "Strong industrial operability" patented technology

This invention belongs to the field of scintillator material preparation technology, specifically relating to a method for purifying high-purity cesium iodide and its application in the preparation of cesium iodide scintillator screens. The method involves sequentially mixing and heating cesium iodide-containing waste and residual materials to dissolve them, filtering and removing impurities, adsorption and removing impurities, concentrating and temperature-controlled crystallization, centrifuging, drying, and vacuum packaging. This process comprehensively removes solid particulate impurities, elemental iodine, and various trace metal ions from the raw materials, effectively preventing oxidation and deterioration during purification. The method is simple to operate, highly industrially feasible, and can purify waste materials to a high purity level that meets the requirements of high-performance applications. It allows for the reuse of waste materials at the same purity level, reducing production costs, alleviating raw material supply pressure, and complying with environmental protection requirements. Applying the high-purity cesium iodide obtained by this method to the preparation of cesium iodide scintillator screens using a vacuum thermal evaporation process ensures the excellent performance of the scintillator screens, making them suitable for high-end fields such as medical imaging and non-destructive testing.

The application discloses a preparation method of silicon nitride nano-powder, relates to the technical field of inorganic non-metallic nano-material preparation, and is characterized by a direct nitriding reaction link of silicon vapor and nitrogen plasma. The method uses high-purity silicon vapor prepared by an existing process as raw material, introduces the high-purity silicon vapor into a nitrogen plasma reaction area, and under specific process conditions, the silicon vapor and the nitrogen plasma rapidly generate a nitriding reaction to form a silicon nitride nano-particle precursor. After condensation, collection and simple subsequent treatment, high-purity silicon nitride nano-powder is obtained. The core reaction link of the application does not need to prepare a solid silicon powder intermediate, has high reaction efficiency, high product purity and good dispersity, solves the problems of easy agglomeration and high impurity content of silicon nitride powder in the prior art, and the product can be applied to high-end fields such as high-temperature structural ceramics and semiconductor packaging.

The invention relates to a method for preparing lithium sulfide through a sulfur-lithium salt reaction assisted by molten salt, and belongs to the technical field of lithium-sulfur batteries and solid electrolyte materials, and the method comprises the following steps: 1, carrying out mechanical crushing and screening treatment on a lithium salt; then putting the treated lithium salt and molten salt into a crucible, and uniformly mixing; 2, putting the crucible filled with the lithium salt and the molten salt in the step 1 into a reactor; 3, in an inert atmosphere or a reduced pressure atmosphere, sulfur is added into the reactor, so that the sulfur is molten under the action of the molten salt and permeates to the surface of the lithium salt, and the sulfur and the lithium salt react at an interface to generate lithium sulfide; and 4, cooling the system after the reaction to room temperature in an inert atmosphere or a reduced pressure atmosphere, taking out the product, and separating and recovering the residual fused salt to obtain lithium sulfide powder. The method is simple in process and environment-friendly, and the prepared lithium sulfide has the advantages of high purity, low defect, cubic phase and the like, and is suitable for industrial amplification.