295results about How to "Uniform and stable performance" patented technology

The negative electrode for a non-aqueous electrolyte secondary battery of the present invention includes a conductive porous substrate, and a conductive material and an active material filled in pores of the porous substrate. The active material contains at least one of a metal element and a semi-metal element capable of reversibly absorbing and desorbing lithium.

A method of using thin plate adobe continuous casting and rolling to producing thin band steel coil is provided, which belongs to rolling metal at once after continuous casting, in particular relating to thin standard band steel production method. The invention is characterized in that: a conticaster, a swing shear, a roller-hearth type heating furnace, a scale breaker, a vertical miller, 7 mill groups, laminar flow cooling device and reeling machine are connected to a CSP produce line, the produce line adopts reasonable temperature system, rolling equipment, rolling way and combining with cooling after rolling, the molten steel after continuous casting is a casting adobe of 50 to 70mm thick and 900 to 1300 wide, after cutting, heating, scale breaking, proceed continuous rolling to form a thin band of 1.2 to 1.5mm thick and 900 to 1300 wide, then after cooling to reel steel coil. The production flow is short, the equipment is few, the investment is less and the running expense is low; The technics and equipment is reasonable and high efficient, double locomotive and double flow casting, heating by two furnaces, seven rolling machines roll continuously, the production is smooth and saves energy with high production efficiency; the product performance is even and stable, the board shape is regular with high accuracy and good surface quality.

An ultrasonic transducer is configured to transmit or receive ultrasonic waves. The ultrasonic transducer includes a vibrating member and a piezoelectric member coupled to the vibrating member. The piezoelectric member includes a first piezoelectric part configured and arranged to be deformed by applied voltage to vibrate the vibrating member or configured and arranged to be deformed by vibration of the vibrating member to produce a potential difference, and a second piezoelectric part configured and arranged to be deformed by applied voltage to statically deflect the vibrating member.

The invention provides a method for preparing a polyimide nano-film. The method comprises the steps: firstly, synthesizing polyimide resin from aromatic tetracid dihydride, aromatic diamine and aromatic diisocyanate; and then, mixing the polyimide resin, a polar organic solvent, a diluent, a film forming agent and a molecular weight regulator so as to obtain a polyimide solution system, then, carrying out nano-scale uniform spreading on a clean substrate by dint of the action of a mechanical external force of 0.5N to 30N, and then, carrying out an imidization method, thereby preparing the polyimide nano-film. According to the film, the high-temperature resistance is 10 seconds at the high temperature of 400 DEG C to 750 DEG C, and the electrical insulation property is that the dielectric constant is 1.5 to 4.5 at the frequency of 103Hz. Compared with the prior art, the polyimide nano-film prepared by the method has the advantages of excellent surface physical properties and stable chemical properties, high-temperature resistance, electrical insulation properties and chemical corrosion resistance.

A semiconductor device comprises a semiconductor substrate made of silicon carbide, a gate insulating film formed on the semiconductor substrate, and a gate electrode formed on the gate insulating film. The junction surface of the semiconductor surface joined with the gate insulating film is macroscopically parallel to a nonpolar face and microscopically comprised of the nonpolar face and a polar face. In the polar face, either a Si face or a C face is dominant. A semiconductor device comprises a semiconductor substrate comprised of silicon carbide and a gate electrode formed on the semiconductor substrate. The junction surface of the semiconductor surface joined with the electrode is macroscopically parallel to a nonpolar face and microscopically comprised of the nonpolar face and a polar face. In the polar face, either a Si face or a C face is dominant. The present invention is a semiconductor device having a silicon carbide substrate, and the electrical characteristics and the stability of the interface between the electrode and the silicon carbide or between the oxide film (insulating film) and the silicon carbide in the nonpolar face of a silicon carbide epitaxial layer can be improved.

The invention discloses a lignin and a method for modifying a phenolic resin which is a ramification thereof. The method that the polymerization is performed for a plurality of times and the extent of polymerization is deepened gradually is adopted to improve the uniform stability, the inoxidability, the toughness and the intensity of the product, effectively recycle the wasted resources, lower the cost and make the industrialization easier. The invention is realized by the technical proposal which is as follows: the phenolic resin low polymer is prepared firstly; the lignin or a ramification thereof is added to polymerize in order to obtain a preformed polymer secondly; finally, phenol and formaldehyde are added to polymerize in order to obtain the high polymer. A molding material prepared by the phenolic resin can be widely applied to the manufacture of a low-voltage apparatus, an insulating structure and a product for daily life.

The invention relates to a novel phase change and heat insulation composite wall structure, which is applied to the heat insulation of a wall and mainly comprises a heat insulation layer, a figurate phase change layer and a wall base body to form an integrative composite structure. The heat transmission resistance of the composite wall structure can be evaluated according to the material and the thickness of the wall base body so as to figure out the material thickness of the heat insulation layer and ensure that the heat transmission resistance of the wall base body is equal to that of the heat insulation layer, so that the despicking delay effect of the phase change layer to the temperature variation is improved to the utmost extent. The composite wall structure gives full play to the heat insulation effect of the heat insulation layer and the heat storage and temperature regulation effect of the phase change layer to improve the thermal inertia of the wall body greatly. The composite wall structure has stable performance and is convenient in construction and energy-saving reconstruction of old buildings to achieve the effects of high efficiency and environmental protection.

The invention relates to a preparation method of a multiphase ceramic powder, comprising the following steps of: (1) mixing carbide, boride, silicide and a metal oxide as raw material powders, adding a dispersant and a binder and grinding in an aqueous system to obtain a wet material; (2) carrying out spray-drying and granulation on the wet material obtained from the step (1) to obtain the multiphase ceramic powder. With the introduction of the dispersant, the binder and an antifoaming agent and with the combination of the stirring, grinding, mixing, spray-drying and granulation technologies,multi-phases are uniformly dispersed, thus greatly raising material reliability and performance uniformity. By the adoption of the advanced spray-drying and granulation technology, the powder is moresuitable for dry-pressing or continuous dry-pressing molding after spray-drying and granulation. The preparation method can be used to realize batch production and produce a heating-surface heating element with stable and uniform performance and adjustable resistivity, and has advantages of high production efficiency and low cost.

The present invention relates to low alloy steel and is especially steel for hull structure and its production process. The steel for hull structure consists of C 0.03-0.075 wt%, Si 0.01-0.35 wt%, Mn 1.40-1.60 wt%, Als 0.015-0.100 wt%, V 0.020-0.080 wt% and Fe and impurity elements for the rest. It is produced in a CSP production line with special temperature system, reduction schedule and cooling system, and through casting blank, hydraulically shearing, heating and descaling, rolling into strip steel, stream cooling and finally winding. It has the advantages of less alloy elements, simple production process, high production efficiency, low power consumption, high product performance, etc.

Yeast composition for cow feed additive including at least ruminant yeast and a carrier. The carrier is selected from DDGS (corn lees), chaff, zein powder, brewery mash, bean pulp, soybeanhull, rice bran, or wheat bran. The yeast composition can alleviate the negative effects of heat stress experienced by cows during summer months and improve milk yield.

The invention discloses SBS (styrene butadiene styrene) modified asphalt which comprises the following components in percentage by weight: 2.0 to 6.0 percent of star SBS, 0.08 to 0.2 percent of sulphur, and 2 to 10 percent of nano calcium carbonate. The invention also discloses a method for preparing the SBS modified asphalt. The SBS modified asphalt and the preparation method thereof are characterized in that the star SBS is taken as a modifier of the asphalt so as to improve the performance of the asphalt; meanwhile, the nano calcium carbonate and powdered sulfur are taken as stabilizers of the star SBS modifier so as to ensure the uniform dispersion of the modifier after being added in the asphalt, reduce the occurrence of segregation phenomenon, and improve the performance of the modified asphalt; and the nano calcium carbonate is used for diluting the powdered sulfur, and has the functions of improving the softening point of the modified asphalt and reducing the penetration degree of the modified asphalt.

The gas protected Nb-Ti-B micro alloy weld filament contains C 0.04-0.15 wt%, Mn 1.00-2.00 wt%, Si 0.30-1.20 wt%, Ni 0.60-1.80 wt%, Ti 0.08-0.20 wt%, Mo 0.10-0.80 wt%, Nb 0.01-0.05 wt%, B 0.002-0.012 wt%, S not more than 0.10 wt% and P not more than 0.20 wt%, except Fe and inevitable impurity. Under the protection of mixed gas of Ar and CO2 and proper welding technological parameter and interlayer temperature, the weld seam metal can reach tensile strength over 800 MPa and impact power at -30 deg.c higher than 100 J. When used in multilayer welding, the weld seam metal has excellent structure and performance homogeneity, and the weld filament has excellent technological performance. The present invention may be used widely for welding low alloy high strength steel in engineering machinery, railway bridge, marine facility, high pressure container, etc.

An indium phosphide substrate for semiconductor devices is obtained as follows. In order to have the direction of growth of the crystal in the <100> orientation, a seed crystal having a specified cross-sectional area ratio with the crystal body is placed at the lower end of a growth container. The growth container housing the seed crystal, indium phosphide raw material, dopant, and boron oxide is placed in a crystal growth chamber. The temperature is raised to at or above the melting point of indium phosphide. After melting the boron oxide, indium phosphide raw material, and dopant, the temperature of the growth container is lowered in order to obtain an indium phosphide monocrystal. An average dislocation density is a function of a carrier density and diameter of the substrate, dislocation density, and a dopant concentration on the wafer is substantially uniform in the depth direction.

The invention discloses a high-strength and low-density cement paste using a fluid loss agent, relating to the technical field of oil field well sealing cement paste. The high-strength and low-density cement paste using the fluid loss agent comprises the following components in part by weight: 100 parts of G-level oil well cement, 23-50 parts of lightening admixture 6.5-8 parts of microsilica, 2 parts of fluid loss agent and 0.05-0.15 parts of setting retarder, wherein the using amounts of the fluid loss agent and the setting retarder are the percentage of the total mass of the G-level oil well cement, the lightening admixture and the microsilica; the ratio of water to solid in the cement paste is 0.7-0.75 and is the ratio of water to the total mass of the G-level oil well cement, the lightening admixture and the microsilica. The cement paste has a density of 1.20-1.35g/cm<3>, has high strength, good fluidity, no free water and good systematic stability, and can meet well sealing requirements on long-term sealing or full sealing of a deep well in an easily-leaking stratum.

The invention discloses a repeated plate ring wave drawing intense deformation die and technology. The die comprises an upper ring wave die body and a lower ring wave die body, wherein the upper surface and the lower surface of the upper ring wave die body are formed by a plurality of circles of concave-convex, continuous, alternative and coincident ring waves, and the upper surface and the lower surface of the lower ring wave die body are formed by a plurality of circles of concave-convex, continuous, alternative and coincident ring waves. The upper ring wave die body is connected with a movable cross beam of a hydraulic machine. The lower ring wave die body is fixed to a working table board. The upper ring wave die body is a movable die, and the lower ring wave die body is a fixed die. Two locating mechanisms arranged symmetrically in the radial direction are arranged at the upper end of the lower ring wave die body and can locate a plate. The upper ring wave die body and the lower ring wave die body are guided through a guide column and a guide sleeve which are arranged symmetrically in the axial direction, and directly participate in formation of the plate. By means of die closing, the plate is drawn to a set ring wave shape. According to the technology, through the die, repeated drawing is carried out for deforming and refining plate grain particles to enable the size of the grain particles to reach the micrometer level or the sub-micrometer level, finally, a flattening die is used for flattening the deformed plate, and a smooth plate is obtained. The die is free of restrictions of the size of the plate, the plate in the large size can be machined, and the comprehensive performance of the aspects such as physics, chemistry and mechanics of the plate are improved greatly.

The invention discloses a ring-wave repeated drawing high deformation mold and technology for a plate. The mold comprises two ring-wave mold bodies including the ring-wave mold body A and the ring-wave mold body B, wherein the two ring-wave mold bodies are both of an axially-symmetrical cylindrical structure, the upper surfaces and the lower surfaces of the ring-wave mold bodies are each composedof a plurality rings of convex-concave continuous alternate matchable ring waves, the ring wave radian and length of the axial center are large, the wave height of the axial center is small, and the ring wave radian and length are decreased ring by ring and the wave height is increased ring by ring from the axial center to the exterior. Ring-wave upper mold bodies are movable mold bodies, ring-wave lower mold bodies are fixed mold bodies, and two groups of positioning mechanisms which are radially and symmetrically arranged are arranged at the upper end of each ring-wave lower mold body; and the plate is drawn to be in a set ring wave shape by the ring-wave upper mold bodies and the ring-wave lower mold bodies through mold closing. According to the technology, crystal grains of the plate can be repeatedly drawn, deformed and refined through the mold, and then the size of the crystal grains reaches the micron grade or the submicron grade. The ring-wave repeated drawing high deformationmold is not limited by the plate size, a large-size plate can be machined, and the comprehensive properties of the plate on the physical aspect, the chemical aspect, the mechanical aspect and the likecan be greatly improved.