45 results about "Short range order" patented technology

A method and apparatus for producing metastable nanostructured materials employing a ceramic shroud surrounding a plasma flame having a steady state reaction zone into which an aerosol or liquid jet of solution precursor or powder material is fed, causing the material to be pyrolyzed, melted, or vaporized, followed by quenching to form a metastable nanosized powder that has an amorphous (short-range ordered), or metastable microsized powder that has a crystalline (long-range ordered) structure, respectively.

A magnetic recording disc is provided according to the present invention for magnetic recording. The magnetic recording disc includes a disc substrate having a locking pattern etched therein. Chemically synthesized iron-platinum particles are provided in the locking pattern and completely fill the locking pattern. The chemically synthesized iron-platinum nanoparticles exhibit short-range order characteristics forming self organized magnetic arrays.

The invention relates to a mesoporous silicon dioxide molecular sieve and a preparation method thereof. The method comprises the following synthesis steps: 1), mixing a nonionic surfactant, a silicon source and water in a molar ratio of (0.01-0.1): (300-500): (1-3), regulating the pH value of the solution to 1.0 to 3.0 with an acid, and stirring the solution at 20 to 80 DEG C for 1 to 3 hours to form a sol mixture; 2) stirring the sol mixture obtained by the step 1 at room temperature, adding an alkaline buffer solution and regulating the pH value of the solution to 5 to 7.5 to obtain a white silicon dioxide precipitate; and 3) roasting the precipitate obtained by the step 2 at 500 to 600 DEG C for 3 to 5 hours to obtain a white mesoporous silicon dioxide material. The white mesoporous silicon dioxide material has an order hexagonal phase structure, a local short range order hexagonal phase structure, a multilayer onion-like structure, a worm-like structure or a foam-like hollow vesica structure. The method for synthesizing the mesoporous silicon dioxide molecular sieve of the invention is a real green biomimic synthesis method. The application of the method can promote the industrial production of like materials.

A piezoelectric material is provided that has mobile point defects which are arranged so that the short-range order symmetry is matched with the crystal symmetry of the ferroelectric phase. A large non-linear electrostrain effect is obtained by the reversible domain switching under electric field in the ferroelectric material. Thus, it is possible to provide a piezoelectric material and its element having a large and steep deformation even at low voltage. Its manufacturing method is also disclosed.

The invention belongs to the Polymer function material field, and specifically relates to a responsive, self-restorative and display angle dependence-free photonic crystal elastomer membrane material,and preparations and applications thereof; the responsive photonic crystal elastomer membrane material comprises a crosslinking Polymer matrix material, a modified nanoparticle and a light absorptivenano-material, wherein mol ratio of said three materials is (1-200):100:(0-5); the modified nanoparticle and the light absorptive nano-material are arranged and dispersed in the crosslinking Polymermatrix material in a short range order structure; the color of the photonic crystal elastomer membrane material cannot change with the observation angles; the photonic crystal elastomer membrane material is self-restorative under mechanical damages, and has elasticity in a stretching process.

The invention discloses a violet zinc-sulfide photonic crystal structural color film and a preparing method thereof, and belongs to the technical field of photonic crystal material preparing. The preparing method includes the steps that zinc sulfide microsphere nano-particles with uniform particle sizes are firstly prepared with a chemical homogeneous precipitation method, a short-range order film is prepared and then roasted in protection atmosphere to enable a trace of organic substances to be carbonized, and therefore the violet structural color film with evenly-distributed carbon black is obtained. The preparing method is simple, repeatability is high, the technical problems that chemical organic pigment is prone to fading and is harmful to the human body are solved, and meanwhile the problems that the requirements of opal structure photonic crystals for a substrate are high, and film coating conditions are strict are solved. The operating process is simple and practicable, large-scale industrial production can be achieved, the preparing method is suitable for building optically-variable-free structural color pigment on the surfaces of various materials, and the broad application prospects are achieved. The prepared violet zinc-sulfide photonic crystal structural color film is even in carbon black distribution, free of angle dependence, good in sphericity degree and uniform in particle size.

The invention discloses a spring, a preparation method thereof and a mold assembly used for preparing the spring. The spring is an integrally formed amorphous alloy element. Compared with conventionalcrystal materials, by utilizing structural characteristics of short range order and long range disorder of an amorphous alloy, the spring has the excellent mechanical properties of relatively high elastic limit, high strength, high hardness and the like, and therefore the phenomenon of flabby stiffness is not prone to occurring after the spring is used many times. Meanwhile, by utilizing the characteristics of no typical deformation mechanism such as dislocation slipping and twin crystal of the integrally formed amorphous alloy, the spring is broken rapidly once exceeding use limit so that anoperator can easily find out and timely handle with the situation that the spring fails.

The invention discloses a method for preparing a large-area structural coloration pattern by ink-jet printing. According to the method, high-reflective-index monodisperse colloidal microspheres, a high-boiling additive, ethanol, glycerol, a surfactant, a defoamer, adhesive, a pH adjusting agent and deionized water are mixed, and ink obtained through ultrasonic dispersion is injected into an ink cartridge of an ink jet printer for printing. According to the method, the high-reflective-index monodisperse colloidal microspheres are evenly deposited on paper through a common ink jet printer, and a short-range order and long-range disordered microstructure is obtained; and due to the mutual effect of the nanometer microspheres with different grain diameters and light, the structural color pattern with different colors can be obtained, the preparation of the large-area structural color pattern is achieved, the method is high in expansibility, and the method has the wide application prospects on the aspects of the display, security and the like.

The invention discloses a high-strength copper-iron-phosphorus alloy and a production method thereof. The formula of the copper-iron-phosphorus alloy comprises the following elements in percentage: 2.1-2.6% of Fe, 0.015-0.15% of P, 0.05-0.20% of Zn, Pb of which the percentage is smaller than or equal to 0.03%, 0.01-0.1% of Ni, 0.01-0.1% of Sn, and the balance being Cu. Compared with the prior art, according to the copper-iron-phosphorus alloy disclosed by the invention, trace amounts of Sn elements and Ni elements, which play a solution strengthening role in the alloy, are added in the raw material formula, so that the hardness of the materials under various states can be improved by nearly 5-10%. During the production of the copper-iron-phosphorus alloy disclosed by the invention, the condition of low-temperature annealing is adopted, so that on one hand, atoms of solution strengthening elements Sn and Ni are clustered at the periphery of a dislocation generated after being processed and hardened so as to perform dislocation pinning, and the strength of the alloy is improved; on the other hand, through low-temperature annealing, a short-range ordered structure formed in an organization and the dislocation perform interaction, so that the alloy is hardened.

The invention relates to a manufacturing method of aluminum alloy for a railway vehicle body. The manufacturing method of the aluminum alloy sequentially includes the steps of prepurging, smelting, primary refining, secondary refining, standing, casting and homogenizing, and further includes the superheating treatment process and the quenching process. After primary refining, aluminum alloy melt is subjected to superheating treatment and quenching and then subjected to secondary refining. By performing superheating treatment on the aluminum alloy melt, the melt structure is switched into a disordered state from a short-range ordered state similar to a solid phase; then, by performing quenching rapidly, molten aluminum alloy is rapidly cooled to a casting temperature without loosing effects. In this way, the number of active crystal nucleuses generated by non-spontaneous crystallization of the molten aluminum alloy is reduced; although spontaneous crystal nucleuses are small, the structure of a cast ingot can be better refined, and a more compact cast ingot structure can be obtained. The performance of the aluminum profile produced by the cast ingot in the method is better than that of aluminum profiles produced by cast ingots in traditional methods.

The invention discloses a process for manufacturing a middle frame of a mobile phone by liquid metal die-casting molding technology. The appearance structure of the middle frame of the mobile phone ismade of a bulk amorphous alloy, namely, liquid metal. The glass forming ability (GFA) of the bulk amorphous alloy is more than 1 mm during copper mold pouring, the solid microstructure of the bulk amorphous alloy is of a short-range ordered and long-range disordered arrangement structure, and the solid microstructure is similar to microstructure in liquid and similar to the microstructure of theglass, so the bulk amorphous alloy is further called liquid metal or metallic glass. The process for manufacturing the middle frame of the mobile phone by the liquid metal die-casting molding technology comprises main technological processes of full vacuum die casting of the liquid metal, machining treatment 1, combination of aluminum/magnesium middle plate, machining treatment 2, NMT, machining treatment 3, polishing, and PVD. According to the process for manufacturing the middle frame of the mobile phone by the liquid metal die-casting molding technology, the middle frame of the liquid metalmobile phone has high strength, high hardness, high elasticity, abrasion resistance, corrosion resistance, almost no plastic deformation, low thermal conductivity and attractive and high-grade appearance, and the production of high performance, high efficiency and low cost is achieved.

The invention provides a ceramic blank crystalline glaze, and discloses a preparation process capable of treating at medium temperature. The ceramic blank crystalline glaze is prepared only by takingfour raw materials of glass powder, zinc oxide, potassium feldspar and calcite to be matched in proportion, glazing a ceramic blank with a high iron content and firing. Due to the abandonment of quartz and clay and combination of a slow cooling heat preservation firing system, long-range disorder and short-range order amorphous photonic crystal structures are easy to form in a glaze glass phase. The phases in the glaze layer generate a large amount of metastable micro-nano spherical particles and unstable spongy structures, and physical coloring is generated, so that the pottery embryo glaze surface presents a beautiful blue, purple or blue-purple double-color bottom glaze effect. Through selective enrichment, doping or substitution of colored ions in zinc silicate crystals, crystal flowers exhibit cyan and bright gold and other prominent effects. The ceramic blank crystalline glaze is fired at the highest firing temperature of 1200-1230 DEG C. The crystal flowers have obvious boundaries, and are radial inside, the diameter can reach 3-4 cm, and multi-color matching is extremely beautiful.

The invention discloses a short-distance repositioning system of an unmanned train. The system includes a plurality of beacons arranged along the extending direction of the ground track and two beaconreaders arranged on the train, the adjacent two beacons have a difference distance and the difference distance needs to be greater than twice the distance of the beacon reading sidelobe plus the train passing in the reading information delay time. The double beacon differential arrangement, and a short-range positioning technology scheme in which the double beacon reader reads the beacons in short-range order are adopted, so that the vehicle-mounted equipment can continuously read two beacons in a short range, thereby completing positioning.

Provided is an epitaxial substrate for semiconductor device that is capable of achieving a semiconductor device having high reliability in reverse characteristics of schottky junction. An epitaxial substrate for semiconductor device obtained by forming, on a base substrate, a group of group III nitride layers by lamination such that a (0001) crystal plane of each layer is approximately parallel to a substrate surface includes: a channel layer formed of a first group III nitride having a composition of In_x1Al_y1Ga_z1N (x1+y1+z1=1, z1>0); and a barrier layer formed of a second group III nitride having a composition of In_x2Al_y2N (x2+y2=1, x2>0, y2>0), wherein the second group III nitride is a short-range-ordered mixed crystal having a short-range order parameter α satisfying a range where 0≦α≦1.

The present invention provides a piezoelectric material, its element, and its manufacturing method. It is a piezoelectric material having movable point defects arranged in such a way that its short-range order symmetry coincides with the crystal symmetry of the ferroelectric phase, using the ferroelectric The reversible switching under the electric field of the domains in the material achieves a large nonlinear piezoelectric effect, and the displacement is large and sharp even at low voltage.

The invention discloses a palladium molybdenum precision resistance alloy and a preparing method thereof. Chemical components of the alloy comprise, by mass, 30-40% of Mo, 0.5-6% of M (at least one ofZr, Cr and Y), and the balance Pd. Cast ingots are prepared through high-frequency induction smelting, and a finished product is prepared through the procedures of high-temperature forging, short-range order transition heat treatment and the like. The alloy has high specific resistance and tensile strength, a low temperature coefficient of resistance, high oxidation resistance and high abrasive resistance, is a precision resistance alloy material with good comprehensive performance, and has wide application prospects in the cutting-edge technical fields of computer technology, aerospace and aviation, and the like.

A protection film and a method for depositing the protection film are provided. The method is used to form a protection film having low resistivity on a substrate. In the method, at first, a mixing operation is performed to mix a plurality of metal gases. The metal gases consist of silver, magnesium, and aluminum, or consist of silver, copper, and aluminum, or consist of copper, Nickel, and aluminum. The metal gases have two or more atom sizes. Thereafter, a depositing operation is performed to deposit an amorphous metal film on the substrate by using the mixed metal gases. The atoms of the amorphous metal film are arranged in a short-range order. Then an annealing treatment is performed to anneal the amorphous metal film to form a meta-stable metal film having averagely distributed grains to be used as the protection film.

The invention belongs to the field of reverse research on the performance evolution in a thin film growth process, and particularly relates to a research method on microstructure evolution in an SiO2 thin film growth process. The research method can be used for evaluating an evolution rule of a microstructure in the SiO2 thin film growth process. According to the research method, layered corrosion is performed on an SiO2 thin film by adopting a chemical solution corrosion method, so that infrared dielectric constant testing is performed on the corroded SiO2 thin film respectively, and a short-range ordered structure of the SiO2 thin films with different thicknesses can be evaluated; the research method has an important significance on deep understanding of the microstructure in the thin film growth process; a reverse research method is provided for the research on the performance evolution rule of the growth process of a thin film material. According to the method, the defects of long period, high cost and the like of a conventional layered preparation method are overcome, and a novel method is provided for the reverse research on the growth process of the thin film.

The invention relates to a method for producing micro- and/or nanopore mass arrangements on a substrate, comprising the following steps: functionalizing the substrate surface in selected areas by applying a bonding agent; depositing, from an aqueous dispersion on the substrate surface, colloid particles which are capable of selectively binding to the functionalized areas of the substrate surface, an ordered monolayer of the particles forming on the substrate surface; removing non-bound colloid particles; freezing the substrate; and sublimating the residual water on the substrate in vacuo, the short-range order of the particle monolayer remaining intact.

The invention relates to a porous carbon electrode material with an easily-regulated microstructure as well as a preparation method and application of the porous carbon electrode material. The porous carbon electrode material has the characteristics of long-range disorder and short-range order and is prepared by introducing a polar group to a carbon-rich raw material to prepare an amphipathic carbon-rich material, then, adding water to mix the amphipathic carbon-rich material with a biomass material and/or an amphipathic polymer material, then, carrying out gelatination, and then, carrying out crosslinking, curing and high-temperature pyrolysis. The microstructure of the porous carbon electrode material can be regulated by regulating the ratio of the raw materials, the moisture content of a gel as well as the treatment temperature during crosslinking, curing and high-temperature pyrolysis. The porous carbon electrode material disclosed by the invention is high in carbon yield and excellent in conductivity so as to be particularly used as an anode material of a sodium-ion battery or an electrode material of a supercapacitor; and the porous carbon electrode material is simple in preparation method, available in raw materials and low in cost so as to be suitable for large-scale production.

The invention discloses a simple thermal expansion method for preparing thin graphene. The method comprises the following step: scattering graphite oxide powder into a furnace body of 250-400 DEG C to suddenly raise the temperature of the graphite oxide powder, so as to expand graphite oxide to obtain the thin graphene powder. The thermal expansion process of graphite oxide is directly completed under a simple condition without additional conditions mentioned in known reports such as graphite oxide pre-treatment, expansion in a hydrogen environment, expansion in a vacuum environment and the like. The number of laminates of graphene is less than 10, and graphene has no obvious diffraction peaks in an x-ray diffraction spectrum and belongs to short-range order and long-range disorder. The production cost is lowered while the production efficiency is improved, and the method is quite suitable for large-scaled production of graphene.