290results about How to "No decomposition" patented technology

The invention relates to a 3D printing composition as well as a preparation method and applications thereof. The composition comprises gypsum powder, oxide powder, a binding material, a fortifier, a solid lubricant and a preservative, and preferably comprises auxiliaries. The composition is low in cost, good in stability, high in forming strength, good in tenacity, difficult to deform, can be used in the field of 3D printing technology, and the preparation method has the advantages of being pollution-free, green, environment-friendly and the like. Therefore, the 3D printing composition as well as the preparation method and applications thereof have excellent scientific research values and industrial application potential.

The invention discloses an aqueous electrolyte solution of a secondary lithium ion battery with ferric phosphate considering as the positive material and with both the high temperature performance and the low temperature performance. The aqueous electrolyte solution comprises LiPF6 lithium salt, an organic solvent and a film-forming additive, and is characterized in that the electrolyte solution further comprises high temperature additive; the organic solvent is composed of one or a plurality of carbonic esters and one or more carboxylic esters with low melting point and high boiling point. The carboxylic esters with low melting point and high boiling point are selected from one or a combination of methyl butyrate, ethyl butyrate, propyl butyrate and butyl acetate. The high temperature additive is 1, 3- propane sultone and 1, 4- butane sultone. The electrolyte solution is used for maintaining both the circulation performance in a high temperature state and the low temperature laying performance of the secondary lithium ion battery with the ferric phosphate lithium as the positive material.

The invention discloses a commercial rare earth permanent magnet produced from high-abundance rare earth and a preparing method of the commercial rare earth permanent magnet. The commercial rare earth permanent magnet comprises a main phase and a grain boundary modification phase, wherein the main phase comprises low H (RE100-aMMa)-Fe-B alloy and high H Nd-Fe-B alloy. According to the commercial rare earth permanent magnet, two kinds of main alloy is adopted, the ingredients of the magnet are controlled, a stable 2:14:1 phase is formed by the high-abundance rare earth, and decomposing will not happen in the sintering process; the Cu element high in electrode potential is added into the grain boundary modification phase, the corrosion resistance of the magnet is improved, and meanwhile the microstructure of the magnet can be optimized by the grain boundary modification phase. According to the method, the two main alloy method is combined with the grain boundary modification technology, the advantages of both the two main alloy method and the grain boundary modification technology are achieved simultaneously, the problems that because of addition of the high-abundance rare earth, the corrosion resistance, the residual magnetism and the magnetic energy product of the magnet are reduced are solved, and the prepared rare earth permanent magnet meets the application requirements of commercial magnets.

The invention discloses an ivermectin nanoemulsion drug combination. Oil-in-water type nanoemulsion consisting of ethyl oleate, Tween-80, 1,2- propylene glycol and ivermectin is prepared from being diluted by double distilled water. The ivermectin nanoemulsion drug combination greatly improves the effect of ivermectin in resisting parazoon, enhances the dissolubility, safety and bioavailability and is a high-efficiency antiparasitic nano level medicinal preparation with convenient use and wide ways of administration.

A brake liquid for the hydraulic brake system of motor-driven vehicle is prepared through preparing polymer mixture by catalytic reaction between biethanediol and 1,1-dichlorethane, adding triethanediol monoethylether borate, triethanediol monomethyl ether, diethanediol monobutylether, diethanediol monoethylether, diethanediol monomethylether and additive, stirring, dissolving, vacuum processing and filtering. It features high properties.

The invention discloses a cobalt-based catalyst as well as a preparation method and application thereof to synthesis of 3-hydroxycarboxylate. The cobalt-based catalyst comprises: nano metal cobalt which is used as a main active component, a porous material which is used as a composite carrier, and a nitrogen-doped carbon material, wherein the nano metal cobalt is uniformly loaded on the porous material; the surface of the nano metal cobalt is coated with the nitrogen-doped carbon material. The preparation method comprises the following steps: enabling a mixed reaction system containing a cobalt source, a carbon-nitrogen precursor and a solvent to react at 25 to 80 DEG C for 0.5 to 2h, and adding the porous material; then roasting at 550 to 900 DEG C for 2 to 3h in a protective atmosphere to obtain the cobalt-based catalyst. The cobalt-based catalyst provided by the invention has stable structure and properties and high reaction activity and 3-hydroxycarboxylate selectivity; the cobalt-based catalyst has the advantages that the preparation method is simple, the catalyst is easy to separate and recycle after reaction, the catalytic property of the catalyst is not reduced after the catalyst is repeatedly used for a plurality of times and the like, so that the catalyst is more suitable for industrial amplified application.

The present invention provides anhydrous crystals of β-lactam compound represented by the formula:The β-lactam compound of the invention is produced by heating an aqueous solution of a salt of the β-lactam compound and adjusting the pH of the aqueous solution to 3 or lower. The β-lactam compound has excellent storage stability.

The invention discloses a silver plating copper powder, a chemical plating liquid and a method of chemical plating; wherein, the silver coating ratio of the silver plating copper powder is 10 to 95%;the silver plating layer comprises 0.5 to 1.2wt% rare-earth metal cerium and / or lanthanum and / or yttrium; the chemical plating liquid comprises three independent components of silver nitrate water solution, formaldehyde ethanol solution and rare-earth nitrate water solution. The method of chemical plating is characterized in that (1) the copper powder is washed and is processed by ultrasonic sensitization and ultrasonic activation in sequence, and (2) the three components of the chemical plating liquid are added in sequence and the ultrasonic chemical plating is processed. The method of chemical plating has the advantages of utilizing the modification effect of rare-earth, raising the stability of plating liquid, the catalytic activity of copper powder surface and the reduction activity ofsilver ion, adjusting the silver coating ratio from 10% to 95% according to different demands, and even distribution, smooth surface and high conductivity and oxidation resistance of silver plating layer.

The invention discloses an InGaN / GaN quantum well laser, comprising a substrate and the following components sequentially arranged on the substrate: a low temperature GaN buffer layer, a high temperature n-type GaN layer and an n-type AlGaN light confinement layer; an n-type InGaN lower waveguide layer on the n-type AlGaN light confinement layer; an InGaN / GaN quantum well active region on the n-type InGaN lower waveguide layer; a u-type InGaN upper waveguide layer on the InGaN / GaN quantum well active region; a p-type AlGaN electron barrier layer on the u-type InGaN upper waveguide layer; a p-type AlGaN / GaN light confinement layer on the p-type AlGaN electron barrier layer; and a p-type GaN ohmic contact layer on the p-type AlGaN / GaN light confinement layer. The invention also discloses a manufacturing method for the InGaN / GaN quantum well laser. The invention adopts the InxGa1-XN of 1 to 2 single-atom layer thickness to be inserted into the cap layer so that the two-dimensional island-like surface of the InGaN quantum well surface becomes smooth, that the distribution of the In group becomes more uniform and that the subsequently formed GaN cap layer has a better quality in which the InGaN quantum well is not decomposed during the temperature rise and does not undergo thermal degradation during the subsequent high temperature growth of the p-type AlGaN / GaN light confinement layer.