168results about How to "Raise the transition temperature" patented technology

A phase change memory cell includes first and second electrodes having generally coplanar surfaces spaced apart by a gap and a phase change bridge electrically coupling the first and second electrodes. The phase change bridge may extend over the generally coplanar surfaces and across the gap. The phase change bridge has a higher transition temperature bridge portion and a lower transition temperature portion. The lower transition temperature portion comprises a phase change region which can be transitioned from generally crystalline to generally amorphous states at a lower temperature than the higher transition temperature portion. A method for making a phase change memory cell is also disclosed.

A thermoelectric device that can exhibit substantially high specific power density is provided. The device includes core having a p-type element made from carbon nanotube and an n-type element. The device also includes a heat plate in and a cool plate, between which the core can be positioned. The design of the thermoelectric device allows the device to operate at substantially high temperature and to generate substantially high power output, despite being light weight. A method for making the thermoelectric device is also provided.

This invention provides method for sustained release delivery of structurally delicate agents such as proteins and peptides. Using a unique emulsion system (Stable polymer aqueous-aqueous emulsion), proteins and peptides can be microencapsulated in polysacchride glassy particles under a condition free of any chemical or physical hazard such as organic solvents, strong interfacial tension, strong shears, elevated temperature, large amount of surfactants, and cross-linking agents. Proteins loaded in these glassy particles showed strong resistance to organic solvents, prolonged activity in hydrated state, and an excellent sustained release profile with minimal burst and incomplete release when being further loaded in degradable polymer microspheres. This invention provides a simple yet effective approach to address all the technical challenges raised in sustained release delivery of proteins.

The present invention relates to a closure system including a thermochromic tamper-control means of color that is irreversibly modified in the event of the temperature of the closure system being raised above a threshold temperature, said closure system comprising a polymer matrix having incorporated therein at least one thermochromic pigment of color that is irreversibly modified after said closure system has been exposed to a temperature close to or above a threshold temperature. The invention also relates to a method of preparing a thermochromic closure system, and to receptacles provided with said system.

A device and a method for thermal pre-stressing lengthy hollow objects, in particular glass tubes, are disclosed. The device comprises a heating device, a fixture for receiving an object, and a coolant feed device comprising an outer coolant feed unit with a plurality of nozzles for feeding coolant against an outer surface of the object, and further comprising an inner coolant feed device for feeding coolant against an inner surface of the object.

The invention discloses polyamide resin and intermediate compound thereof as well as the preparation method and the application. The polyamide resin is provided with the chemical structure shown in formula II, wherein, X1 and X2 can be identical or different, representing quadrivalent aryl; Ar represents bivalent aryl, and T represents end capping reagent. The polyamide resin is obtained by polyamic acid shown in formula I structure general formula through chemical imidization or thermal imidization. The polyamide resin is dipped through prosomatic polyamic acid solution or polyamic acid solution being obtained after being dissolved with solvent with a low-boiling point, the basal body is strengthened, and the prepreg is obtained. After the heat-press forming operation is performed, a metal foil layer is covered, and a metal foil layer pressing plate is obtained. The polyamide resin provided by the invention has the advantages of excellent heat resisting property, high mechanical property, low dielectric constant and dissipation, high electrical insulation property and low water absorbing capacity, thereby being especially suitable for manufacturing core plates of packaging subsctrates for packaging super large-scale integrated circuits.

The catalyst includes alumina, RE metal oxide, composite Al-La oxide, and active metal Pt, Pd and Rh. It features that the mixed oxide grain with aluina, cerium oxide and Al-La oxide carries at least one of Pt and Pd as well as Rh. The mixed oxide grain is prepared through dissolving salt of Al, Ce and La in water, adding NH3OH to produce precipitate, and heating to decompose the precipitate. The catalyst preparing process includes carrying mixed oxide grains onto the carrier, carrying least one of Pt and Pd onto the mixed oxide grains, and carrying Rh finally. The catalyst is especially suitable for purifying automobile tail gas of gasoline engine near the theoretical air/fuel ratio, and has the features of lasting use, less noble metal consumption, high purifying efficiency and powerful sulfur poison resistance.

The present invention provides a blow molded heat set PET container having enhanced thermal properties and a first glass transition temperature and a second endothermic transition temperature substantially higher than the glass transition temperature.

The invention relates to a halogen-free non-phosphorus flame-retarded resin composition which is composed of a constituent and a solvent; the constituent comprises the following components in parts by weight: 50-80 parts of halogen-free epoxy resin, 10-30 parts of nitrile-group resin, 5-20 parts of cyanate ester resin, 15-40 parts of curing agent and 10-100 parts of filler, wherein the constituent is dissolved in the solvent and accounts for 65wt%-75wt% of the total weight. According to the invention, the nitrile-group resin is added in the halogen-free non-phosphorus flame-retarded resin composition, so that a purpose of improving resin flame resistance, high temperature resistance and dielectric properties is realized; the halogen-free epoxy resin and the cyanate ester resin are supplemented to overcome the defects that nitrile-group resin is sufficient in toughness and machinability is poor, and water absorption of the resin is improved; and moreover, the UL-V0-grade green and environment-friendly halogen-free non-phosphorus flame-retarded resin composition with excellent toughness, machinability and water absorption is obtained.

The invention belongs to the technical field of 4D printing additive manufacturing, and discloses a 4D printing method of a nickel-titanium-based ternary shape memory alloy. The 4D printing method ischaracterized in that a selective laser melting technology is adopted for printing gas atomized prefabricated NiTiZr ternary alloy powder, and a component obtained through printing has the shape memory function; and the laser energy density is changed by changing the technological parameters adopted in the selective laser melting technology, and therefore the changes of the structure and performance of the printed piece are regulated and controlled. According to the 4D printing method, the ternary component Zr is introduced into an existing nickel-titanium binary alloy, the martensite phase transformation temperature is obviously increased, the selective laser melting technology is adopted for forming, and complex parts uniform in structure and high in density can be obtained while the excellent shape memory performance and mechanical performance are guaranteed.

A toner containing core particles each containing at least a resin A having a polyester skeleton and a colorant; and vinyl resin fine particles each of which encapsulates a resin B having at least a polyester skeleton and an endothermic peak measured by differential scanning calorimeter (DSC) at 40° C. to 110° C., wherein the vinyl resin fine particles are attached onto each of the core particles.

The invention provides a cobalt-base block amorphous soft magnetic alloy with high amorphous forming ability and a preparation method thereof. The molecular formula of the amorphous soft magnetic alloy is CoaFebNicBdSieNb5, in which a, b, c, d and e are atomic percents, wherein a is larger than or equal to 25 and smaller than or equal to 60, b is larger than or equal to 10 and smaller than or equal to 28, c is larger than or equal to 2 and smaller than or equal to 10, d is larger than 0, e is larger than 0, d+e is larger than or equal to 14 and smaller than or equal to 39, and a+b+c+d+e+5 is equal to 100. Compared with the prior art, the alloy material has the advantages of high amorphous forming ability, excellent soft magnetic property and mechanical property, the reduced glass transition temperature of the alloy material reaches 0.5-0.7, the coercive force of the alloy material reaches below 1.5A/m, the rupture strength of the alloy material is larger than 4200MPa, and the alloy material can be prepared into amorphous bars with the diameters of 1mm-7mm due to the high amorphous forming ability; therefore, the alloy material can be widely applied in the fields of transformers, magnetic sensors and the like, and has good application prospect.

The present disclosure includes carbon-carbon composite articles having multiphase glass oxidation protection coatings for limiting thermal and/or catalytic oxidation reactions and methods for applying multiphase glass oxidation protection coatings to carbon-carbon composite articles.

The invention provides compound nitrogen alloy core spun yarn and a preparation method thereof, and belongs to the technical field of molten steel refinement. The core spun yarn comprises inner core materials and a coating layer, wherein the inner core materials are formed by mixing more than three of ferrovanadium, nitrided ferrovanadium, vanadium nitride, ferro-silicon nitride, silicomanganese nitride, ferrotitanium nitride, ferroboron, ferroboron nitride, ferrocolumbium and ferrocolumbium nitride, the inner core materials at least comprise more than two nitrides or nitralloy, and the coating layer adopts a bright steel belt. The preparation method of the core spun yarn comprises the steps as follows: the inner core materials are prepared firstly; materials are prepared according to required nitrogen content, alloy elements and types of targeted steel; the inner core materials are prepared through powder grinding, uniform mixing and granulating; and the inner core materials are coated with the bright steel belt to form the round core spun yarn. The core spun yarn provided by the invention can improve the strengthening effect of the alloy elements and optimize the microalloying technology, and purposes of stabilizing the target steel performance and reducing the cost are achieved.

The invention discloses a method for preparing a porous titania photocatalysis film by a non-hydrolyzed sol-gel process, including the following steps of: mixing titanium tetrachloride and anhydrous lower alcohol as main materials into TiCl4 alcoholic solution, adding polyethylene glycol after aging the solution for 24 hours at the temperature of 45-65 DEG C. to form a transparent precursory sol; filming the preprocessed substrate material in a drying environment by a dip-coating method, then drying and calcining to form the porous titania photocatalysis film of the invention. Compared with a traditional sol-gel process, the porous titania photocatalysis film prepared by the method of the invention has advantages of simple process, operation convenience and low cost.

The alumino-silicate glass for lamp bulbs with molybdenum components contains alkaline earth metals and has the following composition (in % by weight based on oxide): SiO₂>58 to 62, Al₂O₃ 15 to 17.5, MgO 0.1 to <1, CaO 5.5 to 14, SrO 0 to 8, BaO 6 to 17, ZrO₂ 0 to 1, CeO₂ 0 to 0.3, TiO₂ 0 to 5, MoO₃0 to 2, Bi₂O₃ 0 to 4, with a sum total amount of alkaline earth oxides from 11.6 to 29. Lamp bulbs made with this glass can withstand a bulb temperature of greater than 650° C.

A method for processing a metal film (1) embedded in a carrier (2) includes the step of heating the metal film (1) in such a way that the metal film (1) is transformed in a subregion into at least one insulator section (3). The metal film (1) is preferably locally heated by laser radiation (4). Also described is a component (10, 11, 12, 13) which is produced by the method and includes an electrostatic clamp, a drive mechanism which is adapted for moving a workpiece under the action of electrical fields, a resistor element or a display device, for example.

A Ga—Sb—Ge family of phase change memory materials is described, including Ga_xSb_yGe_z, wherein a Ga atomic concentration x is within a range from 20% to 45%, a Sb atomic concentration y is within a range from 25% to 40% and a Ge atomic concentration z is within a range from 25% to 55%, is described wherein the material has a crystallization transition temperature T_x greater than 360° C. Adding impurities including one or more element selected from silicon Si, carbon C, oxygen O and nitrogen N, can also increase the crystallization transition temperature T_x to temperatures greater than 400° C., and also reduce reset current.

The invention relates to an ultrahigh-strength TiCN-base Co-containing steel-bonded hard alloy threading tool capable of coating and a preparation method. The preparation method is characterized by comprising the following steps that the ultrahigh-strength TiCN-base Co-containing steel-bonded hard alloy threading tool takes Co-containing Fe-Mo-Cr alloy steel as a matrix, and TiCN with the mass fraction of 20-35% is added as a hard phase; the surface of powder is activated by adopting the method that quantitative preoxidation oxygen aeration is carried out after high-energy ball milling, the sintering activity of the matrix is improved, then the oxygen content (less than 800 ppm) is reduced substantially by a carbon and oxygen reduction reaction in the sintering process, and the sintering temperature is reduced; and the tempering resistance, the PVD coating property, the strength and the toughness of the ultrahigh-strength TiCN-base Co-containing steel-bonded hard alloy threading tool are improved by leading in a strengthening element of Co. The ultrahigh-strength TiCN-base Co-containing steel-bonded hard alloy threading tool has high strength (2800-4000 MPa) and high toughness (alpha k is equal to 7-15 J/cm2, KIC is equal to 20-28 MPa.m1/2), the limitation that a traditional steel-bonded hard alloy is only used for mid-and-low-end wear-resistant pieces can be broken through, and threading tools such as a PVD coating and squeezing screw tap and a cutting screw tap which are more wear-resistant than high-speed steel and are more edge-breaking-resistant than hard alloy are prepared.

The invention discloses a cellular denitrification catalyst and a preparation method thereof. The catalyst preparation method comprises the following steps: dissolving a titanium source precursor in an acid to form a solution; respectively dissolving a molybdenum source precursor and a rare earth precursor to form solutions; uniformly mixing the above solutions, regulating the pH value to 7-12, and performing precipitation and filtration; then adding deionized water to form a pulp through blending; adding a vanadium source precursor solution, performing uniform mixing, and then directly performing drying, roasting and powder grinding; then adding an extrusion aid, the molybdenum source precursor solution and a pore forming agent into the powder, adding water with stirring to form a paste through blending, and regulating the pH value to alkaline; then adding nano silicon dioxide, glass fibers and an adhesive, and performing uniform mixing; and conducting extruding through an extruder to obtain a cellular blank, and performing drying and roasting to obtain the finished product. The cellular denitrification catalyst prepared by the preparation method disclosed by the invention can overcome the defects of the denitrification catalyst in the prior art, such as active center imbalance and unstable activity in flue gas.

An artificial sphincter comprises an anchoring element in form of a shape memory coil, which has a transition temperature, which is significantly higher than the human body temperature of about 37° C. At lease a portion of the cylindrical sphincter body is enclosed by the coil. The coil to be threaded onto threads provided at the exterior mantle face of the body. Also disclosed is a method for inserting and anchoring the sphincter in an urethra and a device for inserting and anchoring the sphincter which comprises a proximal end portion of about cylindrical shape, means for coupling with the sphincter disposed at the proximal end of said proximal end portion and being operable from a distal end portion thereof, a channel disposed within the proximal end portion which has an opening at the proximal end thereof for adducing an aqueous fluid of a temperature above 37° C. to the shape memory metal coil.

The invention relates to borosiliphosphate glass with high ultraviolet light transmissivity and a preparation method thereof. The glass comprises the following components: SiO2, B2O3, P2O5, ZnO and SrO. The preparation method comprises the following steps: carrying out ball-milling on raw materials corresponding to the oxide components, screening with a 80-mesh sieve, and evenly mixing so as to prepare a mixture; and placing the mixture in a crucible for melting, pouring the melting glass liquid into a stainless steel mould for molding, and annealing so as to obtain the colorless, transparent, uniform and bubble-free blocky glass. The glass prepared by the method is superior to the existing ultraviolet-transmitting glass material in the aspects of comprehensive properties such as thermal expansion coefficient, density, ultraviolet light transmissivity, corrosion rate in water medium, bending strength and the like. According to the invention, the method is simple and environmentally-friendly, heavy metal ions are not introduced, the purity requirement of raw materials is low, melting temperature is low, and production cost is low; and the prepared ultraviolet-transmitting glass material is good in property and has a wide market application prospect.