1575results about How to "Improve oxidation resistance" patented technology

A method of using nanostructured chemicals as alloying agents for the reinforcement of flouropolymer microstructures, including polymer coils, domains, chains, and segments, at the molecular level. Because of their tailorable compatibility with fluorinated polymers, nanostructured chemicals can be readily and selectively incorporated into polymers by direct blending processes. Properties most favorably improved are time dependent mechanical and thermal properties such as heat distortion, creep, compression set, shrinkage, modulus, hardness and abrasion resistance. In addition to mechanical properties, other physical properties are favorably improved, including lower thermal conductivity, fire resistance, and improved oxygen permeability. These improved properties may be useful in a number of applications, including space-survivable materials and creep resistant seals and gaskets. Improved surface properties may be useful for applications such as anti-icing or non-wetting surfaces or as low friction surfaces.

This present invention discloses a method for the preparation of an improved high temperature engine lubricant composition comprising the steps of: 1) providing at least one biobased natural oil or biobased synthetic oil selected from the group consisting of natural or synthetic vegetable oil, natural or synthetic animal oil, genetically modified vegetable oil, genetically modified synthetic vegetable oil, natural or synthetic tree oil, and mixtures thereof; 2) providing at least one boron nitride; and 3) optionally, providing at least one base oil selected from the group consisting of a synthetic ester, solvent refined petroleum oil, a hydrocracked petroleum white oil, an all hydroprocessed synthetic oil, Fischer Tropsch oil, petroleum oil group I, group II, group III, a polyalphaolefin (PAO), and mixtures thereof; 4) optionally, providing at least one additive or combination of additives selected from the group consisting of anti-oxidant(s), corrosion inhibitor(s), metal deactivator(s), viscosity modifier(s), anti-wear inhibitor(s), friction modifier(s), and extreme pressure agent(s); 5) blending 1), 2), 3), and 4) in any sequence to form said composition.

The nanometer mirror spraying process includes the following steps: 1. eliminating surface dust; 2. spraying primer; 3. sensitizing and activating treatment; 4. spraying solution A comprising silver nitrate solution, ammonia water solution and sodium hydroxide solution and solution B comprising sodium borohydride, potassium borohydride or p-methylaminophenol sulfate solution in the volume ratio of 1 to 1-1.7 to produce reduction; 5. shaping and developing; 6. blowing to dry; and 7. drying. The present invention has the advantages of diversified products, high corrosion resistance, suitability to mass production, high hardness, low cost, etc.

The invention discloses nonaqueous electrolyte for a high-voltage lithium ion battery. The nonaqueous electrolyte consists of a solvent, an inorganic lithium salt, a fluoro-ester additive, a sultone additive, an organic tri-nitrile additive, a bi(polyfluoroalkoxy sulfonyl) imine lithium salt and a lithium battery electrolyte additive, wherein the addition amount of the solvent is 100 weight parts; the addition amount of the fluoro-carbonate additive is 0.2-10 weight parts; the addition amount of the nitrile additive is 0.2-10 weight parts; the addition amount of the bi(polyfluoroalkoxy sulfonyl) imine lithium salt is 0.2-10 weight parts; the addition amount of the common lithium battery electrolyte additive is 0-10 weight parts; the solvent refers to cyclic carbonate and/or chain carbonate; and the molar concentration of the inorganic lithium salt in the solvent is 0.8-1.5mol/L. According to combined use of the sultone additive, the fluoro-ester carbonate additive, the bi(polyfluoroalkoxy sulfonyl) imine lithium salt and the organic tri-nitrile additive, the oxidation resistance of the SEI film during primary formation of the electrolyte can be improved, and the normal-temperature and high-temperature cycle performance of the high-voltage electrolyte is obviously improved.

The invention provides a method for preparing a novel lithium battery diaphragm by coaxial electrostatic spinning, and belongs to the technical field of the lithium battery diaphragm. The novel lithium battery diaphragm is a composite fiber membrane prepared by a coaxial electrostatic spinning technology and having a core/shell structure; the core and shell layers of the composite fiber membrane are concentric-coaxial-shaped; the core layer consists of high-melting-point polyarylether sulfone ketone nanofibers; the shell layer consists of low-melting-point polyvinylidene fluoride nanofibers; particularly, the coaxial composite diaphragm is subjected to hot-press treatment at certain temperature and pressure; and the shell layer fibers generate micro melting or melting to enhance the binding power between fibers, so that the tensile strength of the composite diaphragm in each direction is greatly improved. The porosity of the novel lithium battery diaphragm reaches greater than 75%; and the electrolyte absorption rate reaches greater than 550%; the diaphragm can withstand a temperature of 180 DEG C, so that the diaphragm prepared by the method has good electrochemical property, thermal performance and mechanical performance, which has high application value in the fields of aviation, spaceflight, electric vehicle and the like.

The invention provides a method for preparing a carbon-wrapped iron-cobalt nano composite material with broad band and strong absorption. The composite material is prepared by adopting the technology that plasmas is generated by arc discharge of a negative electrode and a positive electrode under working gas, wherein the working gas is argon gas, simultaneously organic substances which can provide carbon elements and do not introduce impurities except C, H and O are added, the negative electrode is made of metals with high melting point and volatile difficulty such as tungsten and the like, and a target material for the positive electrode is iron-cobalt alloy, wherein the iron element accounts for 10 to 90 percent of alloy atomic. The carbon-wrapped iron-cobalt nano wave-absorbing material prepared by the method is a nano capsule formed by wrapping carbon outside the nano-scale iron-cobalt alloy; on one hand, a carbon shell layer is used as an oxidation resistant layer to increase the stability of a nano compound; and on the other hand, the carbon shell layer is used as a dielectric material and compounded with a magnetic iron-cobalt inner core so that the wave-absorbing property of the wave-absorbing material is superior to most classical ferrite and other most nano compound wave-absorbing materials.

The invention discloses a non-aqueous electrolyte for a high-voltage rapid-charging type lithium ion battery. The non-aqueous electrolyte comprises a solvent, a commonly-used lithium salt, a positive electrode film-forming additive, lithium bis(polyfluoroalkyloxysulfonyl) imide, a fluoro-ester additive, an organic nitrile additive and a lithium battery electrolyte additive, wherein the ingredients are as follows in parts by weight: 100 parts of solvent, 0.2-10 parts of positive electrode film-forming additive, 0.2-10 parts of lithium bis(polyfluoroalkyloxysulfonyl) imide, 0.2-10 parts of fluoro-ester additive and 0.2-10 parts of organic nitrile additive; the solvent is cyclic carbonate and/or chain carbonate; and the molar concentration of the commonly-used lithium salt in the solvent is 0.8-1.5mol/L. According to the non-aqueous electrolyte provided by the invention, the oxidation resistance and wettability of the electrolyte, the oxidation resistance of the positive electrode SEI film in initial formation and the stability of the negative electrode SEI film can be improved; and the normal temperature rapid-charging circulation, the high-temperature 45-DEG C rapid-charging circulation and the high-temperature storage of the high-voltage electrolyte can be greatly improved.

Probe pins related to the present invention are formed from a material which consists essentially of one or more elements selected from the group consisting of platinum, iridium, ruthenium, osmium, palladium and rhodium. A material obtained by adding one or more elements selected from the group consisting of tungsten, nickel and cobalt to this metal may also be used.

The invention relates to an aluminum enamel composite material and a production method, and the composite material comprises the following components by weight: 25-60% of aluminum enamel, 25-60% of aluminum or/and aluminum alloy and 10-30% of aggregate. The production method comprises the following steps: directly adding an aluminum enamel material in a fusion state in the aluminum or/and aluminum alloy, uniformly pugging at 400-600 DEG C, and then cooling and directly extruding to obtain a finished product or a parison. The aluminum enamel composite material has excellent comprehensive properties, the heat conduction coefficient is 70-200w/m.k through testing, the insulating property is good, and the aluminum enamel composite material can bear the high temperature at 400-500 DEG C, the anti-oxidation property is excellent; and the production cost is low with 15-20yuan/kg. The aluminum enamel composite material has the advantages of excellent comprehensive property and low production cost, is an ideal substitution material for aluminum and aluminum alloy, and can be widely used in many fields.

The invention relates to core-shell structured carbon-silicon carbide composite nano-fibers based on a coaxial electrostatic spinning process and a preparation method thereof. The preparation method comprises the following steps: (1) taking a polycarbosilane (PCS) solution and a polyacrylonitrile (PAN) solution as a shell-layer precursor and a core-layer precursor respectively; (2) carrying out electrostatic spinning on the shell/core precursor by using electrostatic spinning equipment with a coaxial needle so as to obtain precursor fibers with a core-shell structure; and (3) carrying out non-smelting treatment and high-temperature pyrolysis treatment on the precursor fibers to finally obtain C-SiC composite fibers with a core-shell structure. The invention provides the novel process method for preparing the core-shell structured composite fibers with carbon fiber cores covering ceramic-phase SiC shells, which have a controllable micro-structure, high efficiency and low cost; and the prepared composite fibers overcome the disadvantage that ceramic fibers are relatively fragile, and functional properties of high intensity and flexibility of the fiber and internal conduction and external insulation are realized.

The invention provides an ultra high-temperature resistant nickel-chrome alloy and a manufacturing method thereof, wherein the ultra high-temperature resistant nickel-chrome alloy has a higher meltingpoint, can resist the high temperature higher than 1300 DEG C for a long time and has better tensile strength and yield strength simultaneously. The ultra high-temperature resistant nickel-chrome alloy basically comprises the following components in percentage by weight: 21-25 of Cr, 58-63 of Ni, Al which is not less than 1 and not more than 1.7, Cu which is not less than 0.5 and not more than 1.0, C which is not less than 1 and more than 0.1, Si which is not less than 0.5 and more than 0, Mn which is larger than 0 and not more than 1.0, S which is larger than 0 and less 0.015, and the balance of Fe. The manufacturing method comprises the following steps: mixing the materials according to the alloy components and then smelting; carrying out secondary refining; first heating the mixture to900-1200 DEG C, keeping the temperature for 10-40 minutes, and then forging; cold processing; and water cooling. The invention improves the high-temperature resistant performance, the tensile strength and the yield strength of the alloy, and has better comprehensive benefit. The manufacturing method solves the problems of alloy smelting and heat processing, and improves the product purity.

The invention discloses a method for preparing binary or ternary fluorine-containing sulfimide alkali metal salts, a method for preparing ionic liquid by the binary or ternary fluorine-containing sulfimide alkali metal salts, and applications of the alkali metal salts and ionic liquid as electrolytes in carbon-based super capacitors, secondary lithium (ion) batteries, and the like. The method for preparing the binary or ternary fluorine-containing sulfimide alkali metal salts provided by the invention is short in operation steps, easy for product separation and purification, and high in product yield and purity; the binary or ternary fluorine-containing sulfimide lithium provided by the invention has good thermal stability and hydrolysis resistance; a nonaqueous electrolytic solution of the binary or ternary fluorine-containing sulfimide lithium has high conductivity and lithium ion transference number, and also exhibits good oxidation resistance and good compatibility with widely-used electrode materials; meanwhile, the ionic liquid containing the binary or ternary fluorine-containing sulfimide anions exhibits the properties of low viscosity and high conductivity, and has a wide electrochemical window.

The invention discloses a high-pressure electrolyte for a high-nickel ternary cathode material system lithium ion battery. The high-pressure electrolyte is composed of an organic solvent, an electrolyte lithium salt, a cathode film-forming additive, an anode film-forming additive and an anti-oxidation additive; the cathode film-forming additive is 1,5,2,4-dioxadithiane 2,2,4,4-tetraoxide, the anode film-forming additive is 4-fluoro-1,3-dioxolan-2-one, the anti-oxidation additive is tris[2-[2-(2-methoxyethoxy)ethoxy]ethyl]orthoborate, and by taking the total mass of the high-pressure electrolyte as a reference, the addition amount of the athode film-forming additive is 0.5-1%, the addition amount of the anode film-forming additive is 2-5%, and the addition amount of the anti-oxidation additive is 0.5-1%. The high-pressure electrolyte has relatively good oxidation resistance, high temperature resistance and safety characteristics, guarantees the battery to have relatively good cycle life, also has relatively high electrical conductivity, is capable of guaranteeing the high rate and power characteristics of the battery, also has relatively high safety, and is capable of substantially improving the safety performance of the power battery.

PCT No. PCT/JP95/01349 Sec. 371 Date Mar. 26, 1996 Sec. 102(e) Date Mar. 26, 1996 PCT Filed Jul. 6, 1995 PCT Pub. No. WO96/12820 PCT Pub. Date May 2, 1996TiAl intermetallic compound-based alloys comprising Ti, Al, Nb and Cr and, if necessary, further comprising Ni and Co, which have excellent plastic workability, good resistance to oxidation at high temperatures, high strength or good creep resistance.

The invention discloses a treating fluid for preparing a zirconium-containing coloring passive film on the surface of an aluminum alloy and a treating method thereof. The zirconium chemical passive treating fluid comprises the following main components of: potassium fluoride, a pH value regulator, fluorozirconate and /or potassium fluozirconate; and the pH value of the treating fluid is between 2.5 and 4.5, and the film can be formed within 3 to 10 minutes. The color of the passive layer prepared by the method is black gray; the film layer is tightly combined with a substrate; and the film layer has high strength and high corrosion resistance. The method is simple in operating process, and a coating does not contain hexavalent chromium which is harmful to the environment and human bodies.

The invention discloses alkali metal salts of binary or ternary fluorine-containing sulfimide, a method for preparing ionic liquid from the alkali metal salts of binary or ternary fluorine-containing sulfimide, and applications of the alkali metal salts and the ionic liquid as electrolytes in carbon-based supercapacitors, secondary lithium (ion) batteries, and the like. The method for preparing the alkali metal salts of binary or ternary fluorine-containing sulfimide provided by the invention is short in operation steps, and the product is easy to separate and purify, and very high in yield and purity; the binary or ternary fluorine-containing lithium sulfimide provided by the invention is good in thermal stability and hydrolysis resistance; the non-aqueous electrolyte has high conductivity and lithium ion transport number, exhibits good oxidation resistance, and has good compatibility with widely-used electrode materials; meanwhile, the ionic liquid containing binary or ternary fluorine-containing sulfimide anions is characterized by low viscosity and high conductivity, and has a wide electrochemical window.

The invention relates to an oxidation-resistant disperse dye composition and preparation and an application thereof. The oxidation-resistant disperse dye composition comprises the combination of any 2-4 of a yellow dye shown as a general formula (I), an orange dye shown as a general formula (II), a blue dye shown as a general formula (III) and a red dye shown as a general formula (IV), not more than two types of dyes are shown as each general formula; and the oxidation-resistant disperse dye composition is applied to pre-treatment dyeing of dacron or polyester-cotton blended fabrics. The disperse dye composition can be used for dyeing polyesters and blended fabrics thereof under the strong oxidative condition that the mass concentration of H2O2 is 0.1-0.5 percent, and an obtained fabric has the advantages of stable chromatic light, bright color, neat cloth cover and excellent fabric style; and according to the disperse dye composition, pretreatment and one-bath and one-step dyeing of polyester fiber or blended fabrics thereof are realized, efficiency is increased, production cost is reduced, and dyeing waste water is reduced.

The invention discloses a high-performance silicon-based conductive rubber and a preparation method thereof. The conductive rubber is mainly composed of silicon rubber, silane coupling agent, vulcanizing agent, fire retardant and conductive powder, wherein the conductive powder is mixture of powder with different particle diameters, and the silane coupling agent covers the conductive powder. The high-performance silicon-based conductive rubber has the advantages of excellent electrical characteristic and physical property, excellent conductive property, aging resistance high and low temperature resistance, stable resistance time characteristic, controllable resistance temperature coefficient, higher temperature limitation and the like. The high-performance silicon-based conductive rubber is mainly used for military shelters and military electronic equipment in the fields of aviation, aerospace, ships and the like, as well as electronic products, telecommunication equipment, high-frequency control equipment and other occasions which requiring a very wide watertight, airtight or frequency range and needing excellent shielding performance.

The invention discloses a method for preparing a high-temperature proton exchange membrane. The method is characterized by comprising the following steps: introducing a precursor composition with a metal organic frame into oxidized graphene to form a coexisting body of the oxidized graphene and the metal organic frame, subsequently adding the coexisting body together with a sodium hydroxide solution into an N-methyl pyrrolidone solution of sulfonyl chlorination polyphenyl ether to perform Hinsberg reaction to obtain polymer membrane casting liquid with the coexisting body, coating and drying so as to obtain the high-temperature proton exchange membrane. According to the method, the metal organic frame is introduced into the oxidized graphene by using a hydrothermal method to form the coexisting body, and is further prepared into the high-temperature proton exchange membrane together with sulfonated polyphenyl ether in a chemical bond mode, the membrane is good in mechanical strength, thermal stability and excellent high-temperature proton conductivity and oxidative resistance, and can be applied to high-temperature proton exchange membrane fuel batteries.

There is provided a method for depositing a modified MCrAlY coating on a surface of a gas turbine engine component. The method includes cold gas dynamic spraying techniques to provide a metallurgical bond between a substrate, such as a superalloy substrate, and the modified MCrAlY composition. The method further includes post deposition heat treatments including hot isostatic pressing. The modified MCrAlY composition includes one or more elements of Pt, Hf, Si, Zr, Ta, Re, Ru, Nb, B, and C, which improves the corrosion and environmental resistance of the coated component

The invention discloses a method for manufacturing a microstructure carbide blade. The method comprises the steps that a carbide blade forming mold with a microstructure feature is manufactured through a cubic boron nitride grinding wheel with a microstructure feature on the surface, carbide powder is rolled through the carbide blade forming mold with the microstructure feature to form a microstructure carbide blank, and vacuum sintering is carried out on the microstructure carbide blank to manufacture the microstructure carbide blade. The method for manufacturing the microstructure carbide blade has the advantages of being simple in preparation process, low in cost, good in repeatability and high in practicality, and mass production of the microstructure carbide blade can be achieved.