8results about How to "Small heat release" patented technology

This application relates to the field of electrolyte materials technology, and in particular to a method for preparing lithium selenide. The method includes: obtaining a precursor source, the precursor source including lithium nitride and a selenium source, and subjecting the precursor source to multiple calcination treatments to obtain lithium selenide. The present invention uses lithium nitride as a lithium source and a selenium source to undergo a redox reaction to generate lithium selenide and nitrogen gas. This method has a low cost, does not produce carbon impurities in the prepared product, and the prepared lithium selenide can be used directly as a high-purity raw material for solid electrolytes. In addition, the reaction between lithium nitride and selenium has low exothermic reaction, the reaction is easy to control, and the safety is higher, avoiding the problem of low safety caused by high exothermic reaction of elemental selenium and elemental lithium in the prior art.

The invention belongs to the technical field of solid hydrogen storage, and particularly relates to a hydrogen storage alloy hydrogen absorption and desorption platform pressure and enthalpy change regulation and control method. The method comprises the steps that S1, hydrogen storage alloy is obtained through smelting, and the surface of the hydrogen storage alloy is polished; s2, the hydrogen storage alloy is placed in a high-temperature furnace, and the high-temperature furnace is cleaned; s3, a heating program of the high-temperature furnace is set, the initial temperature is room temperature, then the temperature is increased to 900-1400 DEG C at the heating rate of 100-300 DEG C / h, then heat preservation is conducted for 1-8 h, and then natural cooling is conducted; and S4, when the temperature in the high-temperature furnace is reduced to 30 DEG C or below, the hydrogen storage alloy is taken out, the hydrogen storage alloy is sequentially polished, cleaned and dried, and the regulated hydrogen storage alloy is obtained. By optimizing heat treatment parameters, the performance of the hydrogen storage alloy is remarkably improved, and the requirement for development of the hydrogen energy technology is met.

The invention relates to a low-carbon high-belite / high-iron phase mineral material as well as a preparation method and application thereof, and the low-carbon high-belite / high-iron phase mineral material comprises the following raw materials in parts by mass: 90-110 parts of a calcium raw material, 0-26 parts of a siliceous raw material, 2-29 parts of an aluminum raw material, 7-45 parts of an iron raw material and 1-5 parts of a sintering additive. A calcium raw material, a siliceous raw material, an aluminum raw material and an iron raw material are used as main raw materials, the low-carbon high-belite / high-iron phase mineral material is generated by regulating and controlling the proportion of the raw materials and under the action of a firing additive, the content of belite and iron phase in the mineral material is high, and the mineral material also contains part of alpha '-type dicalcium silicate with high gelation activity; the cement admixture can be used as a cement admixture to be combined with cement clinker to grind cement or be used as an admixture to be directly added into concrete, so that the high compressive strength of the concrete is maintained, the hydration heat release is reduced, the crack resistance is improved, and the chloride ion penetration resistance is enhanced.

This invention pertains to composite material manufacturing technology and relates to a method and structure for curing and stamping at the chamfered position of a honeycomb sandwich structure autoclave. A thermally conductive material is laid on the plane where the stamping position of the honeycomb sandwich structure is located, extending from the stamping position to the center of the plane; the thermally conductive material is positioned between the release film, the breathable felt, and the vacuum bag.

The invention relates to the field of nail polish glue, in particular to patch glue and a preparation method thereof. The patch adhesive provided by the invention is a non-sticky patch adhesive for LED curing, and is prepared by the following steps: pre-polymerizing saturated bio-based polyester polyol with the molecular weight of 2000-4000 and isocyanate, carrying out chain extension by using bio-based micromolecular alcohol, finally carrying out end capping by using a functional acrylate monomer, and adding a photoinitiator and a bio-based monomer. The patch adhesive can effectively improve the surface drying performance of nail tips and nails, is small in heat release and free of pain during application, meets the special requirements of the manicure market, and meets the environmental protection standard at the same time.

The invention discloses a flame-retardant epoxy resin pouring sealant and a preparation method thereof. The flame-retardant epoxy resin pouring sealant comprises high-toughness flame-retardant epoxy resin and a curing agent, the preparation method comprises the following steps: mixing bisphenol A epoxy resin in the epoxy resin component; brominated epoxy resin is C12-14 alcohol glycidyl ether; rubber powder; aluminum hydroxide; active silica powder; a flame retardant; stirring at a high speed, uniformly mixing, and subpackaging, so as to obtain an epoxy resin component; uniformly mixing and stirring the curing agent component, polyether amine and isophorone diamine IPDA, and sub-packaging to obtain the curing agent component; and finally mixing the epoxy resin component and the curing agent component according to a ratio of 100: (5-20) to obtain the high-toughness flame-retardant epoxy resin pouring sealant. The flowability of the component A of the epoxy resin is ensured, and excellent mechanical properties and flame retardancy are provided for cured resin; meanwhile, the shrinkage of a cured product and the cost of a product are reduced.

The invention belongs to the technical field of electronic-grade trimethylsilane, and particularly relates to a purification method and application of electronic-grade trimethylsilane. Comprising the following steps that S1, a trimethylsilane raw material and diluent gas are mixed and introduced into an adsorption tower, components with the boiling point similar to that of trimethylsilane are removed, a trimethylsilane crude product is obtained, and filler of the adsorption tower is a mixture of activated carbon and metal oxide; and S2, introducing the trimethylsilane crude product into a light component removal tower to remove light components, and then introducing the trimethylsilane crude product into a heavy component removal tower to remove heavy components so as to obtain the electronic-grade trimethylsilane. Impurity components such as dimethylsilane in the trimethylsilane raw material, which are similar to the boiling point of the trimethylsilane, are reduced in the content of the components such as the dimethylsilane through the adsorption tower. Diluting gas is added before the trimethylsilane raw material is introduced into the adsorption tower, so that the heat release effect during adsorption is reduced, and disproportionation reaction is avoided. Meanwhile, the added metal oxide in the filler has a synergistic effect with the diluted gas, so that the adsorption heat release is reduced.

This invention belongs to the field of lithium-ion battery material technology, specifically relating to a high-nickel single-crystal ternary cathode modified material and its preparation method. The method includes: ball milling a high-nickel single-crystal ternary precursor, lithium hydroxide monohydrate, and a cerium-tantalum co-doped lithium molybdenum oxyfluoride compound, followed by pre-sintering and high-temperature calcination under an oxygen atmosphere to obtain single-crystal powder particles; then mixing the single-crystal powder particles with a calcium-doped lithium boron phosphorus oxynitride compound, drying, and holding under a nitrogen atmosphere before sieving. The cerium-tantalum co-doped lithium molybdenum oxyfluoride compound is prepared by ball milling, drying, and segmented sintering of lithium carbonate, cerium oxide, tantalum oxide, molybdenum oxide, and lithium fluoride in a protective powder; the calcium-doped lithium boron phosphorus oxynitride compound is prepared by ball milling, segmented sintering, and ball milling and sintering with lithium nitride under nitrogen protection. This invention significantly improves the structural stability and electrochemical performance of the high-nickel single-crystal ternary cathode material.