24results about How to "Reduce solid solubility" patented technology

The embodiment of the invention relates to the photovoltaic field, provides a solar cell and a photovoltaic module, and at least can improve the photoelectric conversion efficiency of the cell. The solar cell comprises a substrate, wherein the surface of the substrate is provided with metal regions and non-metal regions which are alternately arranged; the first tunneling dielectric layer is located on the surface of the substrate; the first polycrystalline silicon layer is positioned on the surface of the first tunneling dielectric layer, and an aluminum element is doped in the first polycrystalline silicon layer; the doped semiconductor structure is located in the first polycrystalline silicon layer corresponding to the metal region and extends towards the substrate from the surface, away from the substrate, of the first polycrystalline silicon layer, and P-type doping elements are arranged in the doped semiconductor structure; the first passivation layer is located on the surface of the first polycrystalline silicon layer and the surface of the doped semiconductor structure; and the first electrode is located on the surface of the first passivation layer corresponding to the metal region, and the first electrode is electrically connected with the doped semiconductor structure.

The embodiment of the invention relates to the field of solar cells, and provides a solar cell and a photovoltaic module, and the solar cell comprises a substrate, and the surface of the substrate is provided with metal regions and non-metal regions which are alternately arranged; the semiconductor doping layer is located on the surface, corresponding to the metal region, of the substrate, and P-type doping elements are arranged in the semiconductor doping layer; the first tunneling dielectric layer is positioned on the surface of the substrate corresponding to the non-metal region; the first polycrystalline silicon layer is located on the surface of the first tunneling dielectric layer, and aluminum elements are doped in at least part of the first polycrystalline silicon layer; the first passivation layer is located on the surface of the semiconductor doping layer and the surface of the first polycrystalline silicon layer; and the first electrode is located on the surface of the first passivation layer corresponding to the metal region, and the first electrode is electrically connected with the semiconductor doping layer. The solar cell and the photovoltaic module provided by the embodiment of the invention at least can improve the photoelectric conversion efficiency of the cell.

The invention relates to a method for improving the thermal conductivity of an aluminum-silicon composite material, which is characterized in that alpha-Al crystal grains and a silicon phase of an aluminum-silicon alloy are regulated and controlled through a high-temperature solid solution and low-temperature aging process, the solid solubility of a silicon element in a collective body is reduced, and the thermal conductivity is improved. The silicon phase is spheroidized through high-temperature solution treatment, the aluminum-silicon two-phase interface density is reduced, meanwhile, growth of aluminum matrix crystal grains is promoted through high temperature, and the crystal boundary density of an aluminum matrix is reduced; and subsequent low-temperature aging treatment promotes sufficient diffusion and precipitation of silicon elements, lattice distortion of an aluminum matrix is reduced, and the heat conductivity of the aluminum-silicon alloy is further improved.

The invention discloses a preparation method of a high-strength conductive CuNiSi alloy. The copper alloy material comprises the following components in percentage by mass: 0.50 to 2.50 percent of Ni, 0.30 to 1.50 percent of Si, 0.50 to 2.50 percent of Co, 0.03 to 0.10 percent of Y and the balance of Cu. The preparation method comprises the following steps of burdening, non-vacuum melting and casting, homogenization treatment, hot rolling, solution treatment, primary cold rolling, regression treatment, secondary cold rolling and aging treatment. The components of the material do not contain toxic elements, a novel covering agent is adopted, the CuNiSi alloy can be produced in a large scale in a non-vacuum atmospheric environment, a novel combined thermomechanical treatment process is combined, the prepared CuNiSi alloy is excellent in comprehensive performance such as hardness, strength, plasticity and electric conductivity, and the service life of the CuNiSi alloy is prolonged. The composite material can be used for manufacturing electric connectors, conductive elastic sheets and other components required in the fields of aviation, spaceflight, new energy automobiles, electric power, electronics and the like.

The invention relates to an aluminum alloy soldering lug and a preparation method and application thereof, and belongs to the technical field of welding. The aluminum alloy soldering lug disclosed by the invention is prepared from the following elements in percentage by mass: 3.0 percent to 4.5 percent of Si, 2.0 percent to 3.5 percent of Fe, 0.8 percent to 1.2 percent of Mg, 0.10 percent to 0.25 percent of Zr, 0.05 percent to 0.15 percent of Sc, 0.02 percent to 0.08 percent of Er, 0.05 percent to 0.12 percent of Ti, 0.005 percent to 0.02 percent of B and the balance of Al and other inevitable impurities. The mass ratio of (Zr + Sc) / Fe is 0.08 to 0.15; the mass ratio of Mg to Si is 0.25 to 0.35; the mass ratio of (Fe + Si) to (Zr + Sc + Er) is 20-25; the problems that laser welding aluminum alloy is thick in weld joint structure and uneven in performance, and a dissimilar material welding interface is embrittled are fundamentally solved.

The invention relates to a high thermal conductivity and high ductility aluminum alloy material and a preparation method thereof, belonging to the technical field of aluminum alloy materials. The aluminum alloy material comprises the following components by mass percentage: Si: 8.50-10.50wt%; Cu: 0.02-0.05wt%; Mn: 0.35-0.60wt%; Mg: 0.01-0.06wt%; Ti: 0.05-0.15wt%; Sr: 0.015-0.025wt%; B: 0.03-0.1wt%; Y: 0.5-1.0wt%; the balance is Al; the content of inevitable impurities is less than 0.05wt%. The invention adds aluminum-copper alloy and aluminum-magnesium alloy, and refines the grain structure of the system with aluminum-titanium alloy, strengthens the grain boundary in the system with aluminum-titanium-boron rod, and enhances the ductility of the finished product; in addition, yttrium, strontium and boron are used for composite modification to synergistically increase the thermal conductivity of the finished product.

The invention discloses an aluminum alloy material for a cast-aluminum rotor of a high-rotating-speed asynchronous motor and a preparation method of the aluminum alloy material. The aluminum alloy material comprises the following components in percentage by weight: 0.3 to 1.5 percent of Ni, 0.2 to 0.5 percent of Fe, 0.2 to 1.0 percent of Si, 0.1 to 0.8 percent of Mg, 0.2 to 1.0 percent of Cu, 0.004 to 0.05 percent of B, 0.0025 to 0.015 percent of Ca, 0.15 to 0.5 percent of Zr, 0.005 to 0.02 percent of Sr, 0.0045 to 0.025 percent of P, V, Mn, Ti, Cr and the balance of Al, and the total content of V, Mn, Ti and Cr is 0 to 0.05 percent. By designing mutual combination of elements MgSiCa, BMnTiVCr and CuNi and combining a specific heat treatment process, precipitation and solid solution of second phase components Mg2Si, Al2CuNi, Al3Fe and AlNi3 are controlled through proper temperature and time, the solid solubility in an aluminum matrix is reduced, under the condition that the conductivity is close to that of a pure aluminum phase, the yield strength is improved by 4 times compared with that of the pure aluminum phase, and the yield strength is improved by 4 times compared with that of the pure aluminum phase. The problem of motor failure caused by rotor deformation and chamber sweeping of an existing asynchronous motor under the high-rotating-speed application working condition is solved.

The invention discloses a high-strength and high-plasticity rare earth magnesium alloy deformed material and a preparation method thereof, and the high-strength and high-plasticity rare earth magnesium alloy deformed material comprises the following components in percentage by mass: 5.0%-6.5% of Gd, 1.5%-2.4% of Y, 1.0%-2.2% of Zn, 0.3%-0.45% of Zr, 5.0%-7.0% of Er and the balance of Mg. The method for preparing the high-strength and high-plasticity magnesium alloy deformation material comprises the steps of alloy smelting, solution treatment, multidirectional free forging and aging treatment, and finally, the yield strength of the high-strength and high-plasticity rare earth magnesium alloy ranges from 398 MPa to 402 MPa, the tensile strength ranges from 441 MPa to 453 MPa, and the ductility ranges from 15.8% to 17.2%. According to the method, part of Gd elements in the Mg-Gd series alloy with the high Gd content are replaced with Er elements, and the elongation of the Mg-Gd series alloy is greatly improved on the basis that the strength of the Mg-Gd series alloy is basically kept unchanged through solid solution strengthening of Er, aging precipitation promotion and c / a value reduction.

This invention discloses a pure magnesium and its purification method. The purification method specifically includes the following steps: (1) placing pure Mg into a crucible and placing it in a melting furnace, setting the temperature of the melting furnace to 650~670℃, and introducing CO. 2 and SF 6 The mixture is protected with a gas mixture. After the pure Mg melts, the temperature is raised to 690~720℃. The Mg-5Mn master alloy is added to the crucible. After it is completely melted, the melt is stirred to make the alloy composition uniform. (2) Remove the slag on the surface of the melt, add the refining agent to the melt, and stir it thoroughly. Let it stand for 30~50 min. (3) After the melt cools down, a high-purity magnesium ingot is obtained. This invention can effectively reduce the Fe impurity content in magnesium metal and reduce the inclusions in magnesium metal.

This application provides a steel material for reactors and a method for preparing the same. The steel material for reactors includes a steel substrate and a protective coating. The protective coating includes an in-situ oxide layer on the surface of the steel substrate and an alumina layer on the in-situ oxide layer. The in-situ oxide layer includes α-Fe₂O₃, and the alumina layer includes α-Al₂O₃. In the steel material for reactors, the α-Fe₂O₃ in the in-situ oxide layer serves as a growth template for the alumina layer. Through the mutual matching and induction effect of crystal structures, the protective coating forms a dense protective barrier on the surface of the steel substrate, effectively reducing the permeation of hydrogen and its isotopes deuterium and tritium.

The invention belongs to the technical field of rare earth magnesium alloy materials, and discloses a high-toughness rare earth magnesium alloy deformed material which is prepared from the following raw materials in percentage by mass: 5.1-7% of Sm, 1-3% of Yb, 0.6-1% of Zn, 0.4-0.6% of Zr and the balance of Mg. A preparation method comprises the steps of smelting and casting, homogenizing treatment, variable-speed isothermal extrusion treatment, aging treatment and the like. According to the rare earth magnesium alloy deformation material and the preparation method thereof, the Sm and Yb elements are added into the Mg-Zn-Zr series alloy, the proportion of all the metal elements in the alloy is adjusted, the rare earth magnesium alloy deformation material shows excellent comprehensive mechanical performance, the yield strength ranges from 459 MPa to 469 MPa, the tensile strength ranges from 477 MPa to 484 MPa, and the ductility ranges from 9.3% to 10.0%.

The application relates to an aluminum-silicon-strontium-titanium-zirconium alloy and an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the same and belongs to the technical field of aluminum alloy welding wires. The alloy components and the weight percentages are as follows: Si: 4.50-5.50%; Mg: 0.01-0.05%; Sr: 0.02-0.50%; Ti: 0.01-0.15%; Zr: 0.01-0.20%; La: 0.01-0.10%; Ce: 0.01-0.15%; C: <0.0010%; the balance is Al and inevitable impurity elements, and the content of the inevitable impurity elements is less than 1.0 wt%. The application further discloses an aluminum-silicon-strontium-titanium-zirconium alloy welding wire prepared from the aluminum-silicon-strontium-titanium-zirconium alloy. Through control of the alloy components and the content of each component, the welding wire formed by the application has excellent performance in alloy mechanical properties, casting performance, grain refinement and welding quality.

The present invention provides an AlSi powder material and a preparation method and application thereof. The AlSi powder material comprises metal Si, Mg, Zr, Mn, Er and a balance of Al and optionally Sc. The present invention partially or completely replaces the metal Sc in the AlSi material by adding metal Er and Zr to the Al‑Si alloy system, and strictly controls the content of each of the above metal components within a suitable range, so as to give full play to the synergistic effect between the metal components and improve the mechanical strength of the Al‑Si alloy system. The characteristics of Er having a small solid solubility in the Al matrix, Er having a strong precipitation driving force in the Al matrix, and Zr being able to form a kinetically stable L12Al3 (Er, Zr) phase with Er can make the AlSi material have better mechanical properties. Adding the abundant and low-priced metal Er to replace the metal Sc therein can also reduce the cost of the AlSi powder material.

This invention discloses a high-saturation magnetization copper-iron alloy material, its preparation method, and its applications, belonging to the field of copper-iron alloy technology. The high-saturation magnetization copper-iron alloy material has an Fe content of 15-30 wt.%, with the balance being Cu and unavoidable impurities. The preparation method employs a composite processing system combining equal channel angular extrusion (ECAP) pre-processing and multi-stage variable temperature rotary forging, achieving simultaneous improvement in alloy strength, conductivity, and saturation magnetization within a short processing time. The Cu-Fe alloy prepared by this invention can achieve a saturation magnetization of over 70 emu / g, while also exhibiting good strength and conductivity. Furthermore, the experimental scheme is simple and easy to operate. These advantages effectively reduce the size of power electronic components and improve their stability during operation, meeting the development needs of the power and electrical industry.

The invention discloses a high-strength rare earth magnesium alloy deformed material and a preparation method thereof, and the high-strength rare earth magnesium alloy deformed material comprises the following elements in percentage by mass: 8.5 wt%-10.3 wt% of Gd, 3.5 wt%-4.5 wt% of Y, 2.0 wt%-3.0 wt% of Zn, 0.45 wt%-0.60 wt% of Zr, 0.4 wt%-0.6 wt% of Nd and the balance of Mg. The method for preparing the high-strength rare earth magnesium alloy deformed material comprises the steps of alloy smelting, homogenizing treatment, upsetting and drawing type multidirectional forging and aging treatment. The microstructure of the magnesium alloy is improved by introducing the light rare earth element Nd and the heavy rare earth elements Gd and Y at the same time, crushing of a grain boundary blocky LPSO phase in the plastic deformation process is promoted, meanwhile, the high-performance magnesium alloy deformed material is obtained through the reasonable forging and pressing technology, and the application prospect of the magnesium alloy in the fields of aerospace, the military industry and the like is greatly expanded.

The invention provides a high-thermal-conductivity TiB2 / Al-Ce-Ni-Fe alloy and a preparation method and application of the high-thermal-conductivity TiB2 / Al-Ce-Ni-Fe alloy, and in the high-thermal-conductivity TiB2 / Al-Ce-Ni-Fe alloy, the element Ce accounts for 5.0-7.0 wt.%; the content of the element Ni is 0.01 to 2.5 weight percent; the percentage by weight of the element Fe is 0.20 to 0.50 percent; the content of TiB2 is 0.01 to 2.1 wt.%; and the balance of Al. The TiB2 exists in the form of ceramic particles. The invention further discloses a preparation method of the TiB2 / Al-Ce-Ni-Fe alloy. The thermal conductivity of the TiB2 / Al-Ce-Ni-Fe alloy ranges from 186 W / (m.K) to 200 W / (m.K), the requirement for high thermal conductivity of aluminum alloy needed in the heat dissipation field can be met, and the TiB2 / Al-Ce-Ni-Fe alloy has very good application prospects and large-scale popularization potential in the heat dissipation fields of communication base stations, micro-channel radiators and the like.

The present invention provides an Al-Cu aluminum alloy, which contains Al, and also contains 0.01-0.6% Cu by mass, 0-0.7% Mg by mass, 0-0.3% Si by mass, 0-0.2% RE by mass, 0-0.3% Cd by mass, and 0-0.3% Sn by mass. The present invention also provides a preparation method of the Al-Cu aluminum alloy and a heat-resistant cable. The present invention uses only a small number of low-cost elements on the basis of maintaining low cost and low process complexity to obtain an Al-Cu aluminum alloy for heat-resistant cables with excellent comprehensive performance (especially electrical conductivity, mechanical properties, and heat resistance).

The embodiment of the present invention discloses a spheroidized grain medical magnesium alloy and a preparation method thereof, which are used to solve the technical problems of the current medical magnesium alloy with fast degradation rate and poor corrosion resistance. The spheroidized fine grain medical magnesium alloy in the embodiment of the present invention includes the following components by weight percentage: Ag: 10wt.%, Y: 2wt.%, Gd: 0.3wt.%-0.9wt.%, Sn: 0.25%; Ce: 0.2wt.%, Si: 0.25wt.%, Dy: 0.1wt.%, Er: 0.12wt.%, Sr: 0.08wt.%, Nd: 0.05wt.%, the remainder is Mg and unavoidable impurities; wherein the single impurity content does not exceed 0.02wt.%, and the total amount of impurities does not exceed 0.1wt.%. The spheroidized grain medical magnesium alloy in this embodiment has excellent corrosion resistance, can achieve uniform degradation during implantation, reduce medical costs, reduce the pain of doctors and patients, and at the same time improves the antibacterial property of the medical magnesium alloy, and can be repeatedly sterilized during implantation.

The invention provides an aluminum-silicon alloy material, an aluminum-silicon alloy casting, a preparation method and a baking strengthening detection method. The aluminum-silicon alloy material comprises the following components in percentage by weight: 8.4%-9.0% of Si, 0.6%-0.8% of Mn, 0.05%-0.35% of Zn, 0.2%-0.3% of Mg, 0.1%-0.3% of Cu, 0.1%-0.18% of Ti, 0.01%-0.03% of V, 0.02%-0.04% of Sr, less than or equal to 0.1% of Fe, Nalt and the balance of Al. 0.004%, Blt; the aluminum alloy comprises the following components in percentage by weight: 0.002% of aluminum, 0.01-0.02% of lanthanum, 0.01-0.02% of cerium, and the balance of aluminum and inevitable impurities. Wherein Mg is beneficial to improving the hardness, strength and fatigue resistance of the aluminum-silicon alloy, Sr and Na are combined, the microstructure of the aluminum-silicon alloy can be improved, and the plasticity of the material is improved. The rare earth elements La and Ce can refine grains and improve the performance of the aluminum-silicon alloy.

This invention belongs to the technical field of cast aluminum alloys, and discloses a high-strength, low-thermal-conductivity cast rare-earth aluminum alloy suitable for brazing and its preparation method. The rare-earth aluminum alloy is composed of the following components by weight percentage: RE: 9~11%, RE being La and / or Ce; Mn: 0.8~1.2%; Mg: 0.4~1%; impurities: ≤0.20%; balance being Al. This invention also discloses a method for preparing the rare-earth aluminum alloy. The synergistic effect of the elements in the rare-earth aluminum alloy of this invention results in a high eutectic temperature, high tensile strength, and low thermal conductivity, meeting the requirements of hard brazing processes. The method of this invention is simple and low-cost. The aluminum alloy of this invention is suitable for manufacturing components in new energy vehicles, such as refrigerant manifolds and refrigerant storage tanks, which have stringent requirements for low heat dissipation, high strength, and weldability.

The invention discloses an aluminum alloy monofilament for an overhead transmission conductor and a preparation method of the aluminum alloy monofilament, and belongs to the technical field of electrical conductor materials, and the preparation method comprises the steps that ZrO2 powder, MgO powder and MoO3 powder are mixed and then treated to obtain ZrMgMo3O12 powder; industrial pure aluminum ingots are added into a smelting furnace, Al-Si and Al-Ce intermediate alloys are added after pure aluminum is completely melted, ZrMgMo3O12 powder obtained after stirring is pressed into the bottom of a solution, stirring is conducted after standing, and an aluminum alloy solution is obtained; argon is blown into the obtained aluminum alloy solution, and drossing is carried out after heat preservation and standing; the aluminum alloy solution is poured into a preheated metal mold, and aluminum ingots are formed through casting; the obtained aluminum ingot is rolled, and an aluminum alloy round rod is obtained; the obtained aluminum alloy round rod is subjected to multi-pass drawing, and a monofilament is obtained; and the obtained monofilament is subjected to heat preservation for 1-4 h at the temperature of 100-140 DEG C and then air cooling, and the aluminum alloy monofilament The conductivity of the prepared low-thermal-expansion aluminum alloy monofilament is larger than or equal to 55% IACS (20 DEG C), the tensile strength is larger than or equal to 160 MPa, the ductility is larger than or equal to 2.0%, and the thermal expansion coefficient is about 20 * 10 <-6 > / DEG C.

The present application provides a die-cast aluminum alloy, a preparation method and an application. By adopting Sb+Y composite modification treatment, online quenching and artificial aging treatment, the mechanical properties and thermal conductivity of the alloy are significantly improved. The prepared die-cast aluminum alloy has a tensile strength of more than 250MPa, a yield strength of more than 110MPa, and a thermal conductivity of more than 180W / m·k, achieving a high level of mechanical properties and thermal conductivity, overcoming the problem of mutual restriction between the two. Therefore, the high thermal conductivity die-cast aluminum alloy provided in the present application has both good thermal conductivity and good mechanical properties, and can be used to manufacture products such as 5G communication base station heat dissipation housings and new energy vehicle heat dissipation parts.

The present invention provides an Al-Si-Fe-Mg series high thermal conductivity aluminum alloy, which contains 5-8% Si by mass, 0.4-0.8% Fe by mass, 0.001-0.05% Cu by mass, 0.05-0.4% Mg by mass, 0.005-0.04% Sr by mass, 0.001-0.05% Zn by mass, 0.001-0.05% Ni by mass, 0-0.1% Co by mass, 0-0.01% Be by mass, and 0.0001-0.1% RE by mass. The present invention also provides a preparation method and a heat dissipation structure of the Al-Si-Fe-Mg series high thermal conductivity aluminum alloy.

The present invention provides an Al-Cu-RE series rare earth aluminum alloy, which contains Al, and also contains 0.01-0.6% Cu by mass, 0.001-0.2% RE by mass, 0-0.7% Mg by mass, 0-0.3% Si by mass, 0-0.2% In by mass, and 0-0.3% Sn by mass. The present invention also provides a preparation method of the Al-Cu-RE series rare earth aluminum alloy and a heat-resistant cable. The present invention uses only a small number of low-cost elements on the basis of maintaining low cost and low process complexity to obtain an Al-Cu-RE series rare earth aluminum alloy for heat-resistant cables with excellent comprehensive performance (especially mechanical properties, heat resistance, corrosion resistance, and electrical conductivity).