35results about How to "Reduce expansion stress" patented technology

A composite oxygen ion transport element that has a layered structure formed by a dense layer to transport oxygen ions and electrons and a porous support layer to provide mechanical support. The dense layer can be formed of a mixture of a mixed conductor, an ionic conductor, and a metal. The porous support layer can be fabricated from an oxide dispersion strengthened metal, a metal-reinforced intermetallic alloy, a boron-doped Mo₅Si₃-based intermetallic alloy or combinations thereof. The support layer can be provided with a network of non-interconnected pores and each of said pores communicates between opposite surfaces of said support layer. Such a support layer can be advantageously employed to reduce diffusion resistance in any type of element, including those using a different material makeup than that outlined above.

Includes the steps of preparing a sheet-like current collector 4 having a plurality of bumps 4A on a surface thereof, the plurality of bumps having a height of 3 μm or greater and 10 μm or less; and forming an active material body having a stacked structure on each of the bumps 4A of the current collector 4. The step of forming the active material body includes a first layer vapor deposition step of causing a vaporized vapor deposition material to be incident on the surface of the current collector 4 in a direction inclined with respect to the normal H to the current collector 4 to form a first layer 101a of the active material body on each bump 4A, the first layer 101a being located closest to the current collector; and a second layer vapor deposition step of causing the vaporized vapor deposition material to be incident on the surface of the current collector 4 in a direction inclined, with respect to the normal H to the current collector 4, opposite to the incidence direction of the vapor deposition material in the first layer vapor deposition step to form a second layer 102a on at least a part of the first layer 101a. In the first layer vapor deposition step, vapor deposition is performed while moving the current collector 4 in a direction in which the incidence angle ω of the vapor deposition material with respect to the normal H to the current collector 4 is decreased.

The invention discloses a process for carrying out submerged arc welding on two plates with thicknesses of no more than 14 mm. The process comprises the following steps: after one part to be welded forms a groove, checking an assembling clearance between the two plates and making the assembling clearance satisfy requirements, fixing a gasket on the back face of an abutted part; enabling a variable speed submerged arc welding trolley to move along a welding joint at a constant speed; controlling a welding wire to swing backwards relative to the trolley in a reciprocating way at a constant speed in the direction of the welding joint when the welding wire on the trolley moves at the constant speed with the trolley; controlling the swinging amplitude of the welding wire, so that the swinging arc of the welding wire always falls within a range of a molten pool; and adjusting the height of the welding wire so as to guarantee that an electric arc can directly act upon the root of the groove when the welding wire is positioned at a swinging arc front point. According to the invention, the desired welding current is reduced, linear energy is also reduced, the expansion stress of the welding joint is reduced and cracks are uneasy to generate on a welding joint terminal; moreover, as the two sides of the side wall of the groove can be continuously heated by the electric arc, the deposition rate is increased, the production efficiency is increased, the electric quantity and the consumption of the welding material are reduced and the production cost is reduced.

The invention discloses modified desulfurization ash for cement and concrete and a preparation method of the modified desulfurization ash. The modified desulfurization ash for cement and concrete is prepared from desulfurization ash and an oxidizing agent through mixing at normal temperature, wherein the oxidizing agent comprises the following components by weight percentage: 70-80% of manganese dioxide, 5-10% of acetic acid and 10-25% of desulfuration residue, the conversion rate of CaSO4.2H2O in the modified desulfurization ash is 95-98%, the mixing amount of the modified desulfurization ash in cement and concrete is 5-25% (by weight percentage). The modified desulfurization ash has early compressive strength improved remarkably when being added into the cement and the concrete, has the compressive strength hardly reduced after being solidified completely, and has little swelling stress.

Scattered electron collector comprising a heat absorbing member having a first end, a second end, an outer periphery and a central bore (14, 16), wherein the central bore is formed in longitudinal direction through the heat absorbing member from the first end to the second end, and a cooling element (50) having an outer periphery and an inner periphery (52). The outer periphery (12) of the heat absorbing member is adapted to be in contact with the inner periphery of the cooling element. Further, at least one slot (20) is formed from the central bore in the direction to the outer periphery of the heat absorbing member to reduce compression stress within the heat absorbing member.

A top combustion type hot air furnace with thermally isolating layer for preburning chamber features that said thermally isolating layer can prevent the transfer of heat from preburning chamber to the internal walls of annular gas cavity and annular air cavity to lower their temp and decrease their temp stress and thermal expansion, so elongating the service life of hot air furnace. A heat isolating layer is also arranged in the second liner between annular gas and air cavities. A movable heat isolating cover is arranged between preburning and burning chambers.

The invention discloses an efficient soundless cracking agent and a production method thereof. The cracking agent product is prepared from the following mineral components by weight percentage: 55-75%of fCaO, 8-22% of C2S, 10-20% of C4AF+C2F, 5-10% of CaSO4, 85-95 parts of an expansion clinker, 5-15 parts of a sulphoaluminate cement clinker, 0.1-0.4 part of a retarder, and 0.1-0.7 part of a waterreducing agent. The invention solves the problem of low working efficiency of existing product, i.e. the cracking agent is fast in early hydration reaction and the temperature rise is fast, the stonestrength is low, spray holes are easily generated, or slow increase of expansion stress causes long crushing time and the like, by adjusting mineral components of the expansion clinker, the calcination temperature is lowered, the efficient soundless cracking agent has the characteristics of reduction of clinker heat consumption, reduction of the emission of nitric oxide, sulfur oxide, CO2 and thelike, and is beneficial to environmental protection.

The invention provides a silicon-carbon negative electrode material, a preparation method and a lithium ion battery. The method for preparing the silicon-carbon negative electrode material comprises the steps: mixing SiOx, a carbon source and a dispersing agent to obtain first mixed solution, wherein x is equal to 0.5-1; 1.0; carrying out first dispersion treatment of the first mixed solution, andperforming filtering and drying to obtain a first dispersion material; carrying out first carbonization treatment of the first dispersion material, and performing crushing to obtain primary particleswith the particle size of 0.5-1 micron; mixing the primary particles with the carbon source and the dispersing agent to obtain second mixed solution; carrying out second dispersion treatment of the second mixed solution, and performing filtering and drying to obtain a second dispersion material; carrying out second carbonization treatment of the second dispersion material, performing crushing toobtain secondary particles with the particle size of 10-15 microns, and obtaining a silicon-carbon negative electrode material. According to the method disclosed by the invention, the finally obtainedsilicon-carbon negative electrode material has a relatively small volume expansion and a good cycle performance.

The invention discloses a heat-resistant pottery. The heat-resistant pottery comprises the following components in percentage by weight: 46-49.5% of silicon dioxide, 35.5-38.5% of aluminum oxide, 0-5%of ferric oxide, 0-2% of calcium oxide, 0-2% of magnesium oxide, 0.8-1.8% of potassium oxide, 0-1.5% of sodium oxide, 0-2% of titanium dioxide and 7-9% of ignition loss parts. The invention also discloses a manufacturing method of the heat-resistant pottery. According to the heat-resistant pottery manufactured by the manufacturing method, aluminum oxide and silicon dioxide in a pottery blank aremutually combined during high-temperature firing at 1145-1230 DEG C to generate mullite with thermal stability, so that thermal stability of the product after firing is improved, the pottery finishedproduct can be used for cooking by open fire heating, and the service life is prolonged.

The invention discloses a high-corrosion-resistance and low-expansion magnesia carbon brick and a preparation method thereof. The high-corrosion-resistance and low-expansion magnesia carbon brick comprises the following raw materials in parts by mass: 60-75 parts of coated magnesia particles, 5-15 parts of fine magnesia powder, 8-18 parts of crystalline flake graphite, 1-4 parts of an antioxidant and 2-5 parts of phenolic resin. The coated magnesia particles comprise the following raw materials in parts by mass: 3-9 parts of active Al2O3 micro powder, 2-4 parts of active MgO micro powder, 0.5-2 parts of active CaO micro powder, 3-7 parts of asphalt powder and 80-95 parts of magnesia particles. The preparation method of the coated magnesia particles comprises the steps of: well mixing the raw materials of the coated magnesia particles in a mixing mill in a hot state at 150-300 DEG C, and cooling to obtain the coated magnesia particles. The preparation method of the high-corrosion-resistance and low-expansion magnesia carbon brick comprises the steps of: well mixing the raw materials of the high-corrosion-resistance and low-expansion magnesia carbon brick, pressing the mixture into a green body, and baking the green body at 150-220 DEG C for 6-12 hours to obtain the high-corrosion-resistance and low-expansion magnesia carbon brick.

The invention discloses an experimental method for reducing hydrogen absorption expansion stress of hydrogen storage alloy powder. The experimental method comprises the steps of: S1, performing an experiment 1 and verifying an interaction relationship between inorganic silicone oil and expansion stress generated in the hydrogen absorption process of the hydrogen storage alloy powder; S2, and conducting an experiment 2 based on the S1, and verifying to obtain an inorganic silicone oil percentage with the optimized effect on the expansion stress generated in the hydrogen absorption process of the hydrogen storage alloy powder, wherein the inorganic silicone oil percentage is a weight ratio of the inorganic silicone oil to the hydrogen storage alloy powder. Through adopting the experimental method for reducing the hydrogen absorption expansion stress of the hydrogen storage alloy powder, an effective measure for reducing the hydrogen absorption expansion stress of the hydrogen storage alloy powder is obtained, and is applied to the actual production operation, thereby increasing the efficiency and safety of the actual production operation.

The invention discloses a rolling sagger and a powder sintering method, and relates to the technical field of high-temperature sintering kilns. The rolling sagger comprises a sagger main body, the sagger main body is a hollow cylinder forming an inner cavity in a surrounding mode and is provided with at least one rotation axis, the two ends of the sagger main body are detachably connected with fixed cover plates, the fixed cover plates are provided with through exhaust holes, and the exhaust holes are communicated with the inner cavity of the sagger main body; a fixed shaft and a movable cover plate are arranged on the outer side of the fixed cover, the movable cover plate is in close fit with the outer side of the fixed cover plate and enables part of the exhaust holes to be in a blocked state, a notch is formed in the movable cover plate, the notch corresponds to at least one exhaust hole and enables the exhaust hole to be in a communicated state, and the movable cover plate can rotate around the fixed shaft. According to the rolling sagger and the powder sintering method, when the rolling sagger rolls in the tunnel kiln, waste gas can be discharged while powder is reserved.