47 results about "Co diffusion" patented technology

The present invention provides a method of manufacturing a crystalline silicon solar cell, subsequently comprising: providing a crystalline silicon substrate having a first side and a second side opposite the first side; pre-diffusing Phosphorus into a first side of the substrate to render a Phosphorus diffused layer having an initial depth; blocking the first side of the substrate; - exposing a second side of the substrate to a Boron diffusion source; heating the substrate for a certain period of time and to a certain temperature so as to diffuse Boron into the second side of the substrate and to simultaneously diffuse the Phosphorus further into the substrate.

The invention discloses a manufacturing method for a black silicon double-face cell. The method comprises steps that (1) double-face texturing for a silicon chip is carried out; (2), black silicon structures are made at two faces of the silicon chip by employing auxiliary metal chemical corrosion; (3), after KOH nanometer suede-like face restoration, metal ions are removed through utilizing acid; (4), PECVD deposition is employed for the first face to form a boron-contained silicon dioxide layer; (5), PECVD deposition is employed for the second face to form a phosphorus-contained silicon dioxide layer; (6), double-face co-diffusion is carried out, and double-face SiNx deposition is carried out; and (7), through double-face screen printing and sintering, the black silicon double-face solar cell is formed. According to the method, doping concentration of the cell surface after diffusion can be improved, and the open-circuit voltage, the short-circuit current and conversion efficiency can be further improved.

The invention relates to a surface treatment method for a tool. The method comprises the following steps of: pretreating the tool; and compounding a diffusion layer on the tool, wherein the compound diffusion layer is a metal ion layer into which titanium ions or aluminum ions are injected, and can be a carbon diffusion layer, a nitrogen diffusion layer or a carbon-nitrogen co-diffusion layer. Layer diffusion treatment is performed on the tool, so that the physical and chemical performance of the surface is changed, the strength of the tool is enhanced remarkably under the condition of not lowering other performance, and excellent comprehensive performance is ensured.

The invention relates to a corrosion-resistant and alkali-resistant treatment method for a pipe piece connecting piece of a metro. The method is characterized by comprising the following steps of: performing multi-metal co-diffusion treatment on the pipe piece connecting piece to endow the pipe piece connecting piece with corrosion resistance and electrical conductivity; and performing different alkali-resistant treatment on special parts which may contact alkaline water after the pipe piece connecting piece is assembled, wherein the special parts comprise polished rod parts and middle threads of bolts in the pipe piece connecting piece, five thread parts and end faces at the two ends of each bolt, and exposed parts after nuts and gaskets are assembled. By the corrosion-resistant and alkali-resistant treatment method for the pipe piece connecting piece of the metro, the technical requirements of corrosion resistance, alkali resistance, electrical conductivity and the like of the pipe piece connecting piece of the metro are met, the maintenance and replacement frequency of components and parts in the running of the metro is greatly decreased at the same time, and the running economy of the metro is improved.

The invention provides an electronic accelerator pedal assembly and belongs to the technical field of car parts. According to the electronic accelerator pedal assembly, the problems that an existing electronic accelerator pedal assembly is complex in structure, not resistant to abrasion, poor in transmission effect and low in sensitivity are solved. The electronic accelerator pedal assembly comprises a base, and the base is composed of the components of, by weight, 1-1.3% of C, 0.8-1% of Si, 0.7-0.8% of Mn, 0.02-0.03% of P, 0.1-0.2% of S, 16-20% of Cr, 0.3-0.4% of Ti, 0.3-0.5% of Nb, 0.5-0.6%of Mo, 0.1-0.2% of Ce, 0.1-0.2% of La and the balance Fe. The base further comprises a co-diffusion coating, is internally provided with an electronic induction part and is further provided with a pedal shaft. The pedal shaft is sleeved with a rotary shaft sleeve, a pedal is assembled on the rotary shaft sleeve, and the base comprises a bottom plate. A cylindrical spring seat is arranged on the bottom plate, a reset spring is fixedly mounted in the spring seat, the reset spring is arranged perpendicular to the bottom plate, and the other end of the reset spring is fixed to the rotary shaft sleeve. The electronic accelerator pedal assembly has the advantages of being simple in structure and high in sensitivity.

The invention relates to a titanium alloy gear with a ferroboron diffusion layer on the surface and a co-diffusion method thereof. The method comprises the step of: by taking a titanium alloy gear as a workpiece and taking iron boride as a source, placing the titanium alloy gear and the iron boride on a negative disk to form a workpiece-source integral structure, wherein the negative electrode of a direct current power supply is connected to the negative disk, and the positive electrode of the direct current power supply is connected to a vacuum container; vacuumizing and introducing argon, applying a direct-current voltage to generate hollow negative glow discharge, migrating, adsorbing and spreading the sputtered boron, iron ion, atoms and particles into the gear to form an alloy layer, preserving the heat, slowly cooling to room temperature, thereby obtaining the titanium alloy gear with the ferroboron diffusion layer. The method disclosed by the invention is advanced in process and low in cost; and the prepared gear is strong in seizure resistance, good in wear resistance and long in service life.

The invention was involved in infiltrated agent of Ti-Al co-diffusion and its preparation. The infiltrated agent consist of 10-25% TiO2,2-25% Al powder, 30-80% Al2O3,0.3-2.8% infiltrated agent. Infiltrated agent was NH4Cl or other halide. The method of infiltrated agent of Ti-Al co-diffusion adopted solid powder embedded infiltration technology and the infiltration temperature adopted ladder temperature. Firstly, the substance was heated to 650-900deg.C for 1-5h. Secondly, it was heated to 900-1150deg.C for 2-8h. The infiltration layer of Ti-Al co-diffusion could be finished by the invention and the infiltration layer was smooth, bright and with high corrosion resistance.

The present invention relates to a novel printable boron doping paste in the form of a hybrid gel based on precursors of inorganic oxides, preferably of silicon dioxide, aluminium oxide and boron oxide, in the presence of organic polymer particles, where the pastes according to the invention can be used in a simplified process for the production of solar cells, where the hybrid gel according to the invention functions both as doping medium and as diffusion barrier.

The invention belongs to the field of air cylinder sleeves, and particularly relates to a high-performance air cylinder sleeve and a production technology and a surface treatment method of the high-performance air cylinder sleeve. The provided air cylinder sleeve comprises 2.3%-2.6% of C, 3.1%-3.4% of Si, 0.5%-0.8% of P, 0%-0.1% of S, 1.6%-1.9% of Mn, 1.7%-1.9% of Cu, 0.5%-0.9% of Cr, 0.6%-1.0% ofNb and the balance Fe. The provided surface treatment method comprises the steps that the surface of the above air cylinder sleeve is sequentially subjected to phosphating treatment and sulfur nitrogen carbon co-diffusion treatment, and the air cylinder sleeve obtained after surface treatment is obtained. The provided air cylinder sleeve has high tensile strength, and serious carbon deposition cannot happen during using. According to the provided surface treatment method, the mechanical strength of the air cylinder sleeve can be further improved, and the carbon deposition situation of the aircylinder sleeve during using is reduced; and meanwhile the cavitation erosion resistance, abrasion resistance and friction reduction performance of the air cylinder sleeve can be improved.

The invention relates to a preparation method of a multilayer composite modified layer with strong toughness on a titanium alloy surface, which belongs to the technical field of the surface modification and strengthening of metal materials. The invention is characterized by adopting a technical scheme that the unit diffusion of Mo and co-diffusion of Mo / N are alternately and cyclically carried out on the surface of a titanium alloy substrate to prepare the Mo / MoN multilayer composite modified layer with strong toughness. The preparation method comprises the following steps of coating a Mo bottom layer with the thickness thereof 4-6 mu m by diffusion on the surface of a workpiece firstly; then simultaneously introducing argon and nitrogen and coating a MoN layer with the thickness thereof 2-4 mu m by diffusion on the surface of the workpiece; cutting off the nitrogen supply, only introducing argon into a vacuum chamber, and continuing to coating a Mo layer with the thickness of 2-4 mu m by diffusion on the surface of the workpiece; by turning on and cutting off the nitrogen supply, continuing to alternately and cyclically coating MoN layers and Mo layers by diffusion on the surface of the workpiece, and enabling the most superficial layer of the multilayer composite layer to be the MoN layer to prepare the Mo / MoN multilayer composite layer with the modulation period of 2-4 mu m and the total thickness of 10-50 mu m; and taking out the workpiece after the workpiece cools in a furnace to the room temperature. The prepared Mo / MoN multilayer composite modified layer obviously improves the wear resistance of the titanium alloy under the high contact load condition.

The invention relates to a corrosion-resistant and alkali-resistant treatment method for a pipe piece connecting piece of a metro. The method is characterized by comprising the following steps of: performing multi-metal co-diffusion treatment on the pipe piece connecting piece to endow the pipe piece connecting piece with corrosion resistance and electrical conductivity; and performing different alkali-resistant treatment on special parts which may contact alkaline water after the pipe piece connecting piece is assembled, wherein the special parts comprise polished rod parts and middle threads of bolts in the pipe piece connecting piece, five thread parts and end faces at the two ends of each bolt, and exposed parts after nuts and gaskets are assembled. By the corrosion-resistant and alkali-resistant treatment method for the pipe piece connecting piece of the metro, the technical requirements of corrosion resistance, alkali resistance, electrical conductivity and the like of the pipe piece connecting piece of the metro are met, the maintenance and replacement frequency of components and parts in the running of the metro is greatly decreased at the same time, and the running economy of the metro is improved.

The invention relates to a surface treatment method for a high-carbon steel part. Nitrogen-carbon rare earth co-diffusion is carried out on the part before metal cementation. Compared with the prior art, nitrogen-carbon rare earth co-diffusion pretreatment is carried out on the high-carbon steel part before metal cementation, carbon concentration higher than that of a base body, large lattice distortion and many defects are formed on the surface of a metal workpiece, and therefore diffusion of metal atoms and carbon atoms can be accelerated; and metal cementation is more efficient, and a cementation layer is dense and firm.

A heat treatment process of a 3Cr2W8V mold comprises the following steps of annealing, quenching, tempering, salt bath treatment and an ion sulphonitriding method. The heat treatment process of the 3Cr2W8V mold is optimized and adjusted, and the hardness, toughness and wear resistance of the 3Cr2W8V mold are effectively improved. In addition, after the 3Cr2W8V mold is subjected to ion sulphonitriding treatment, the wear resistance and occlusion resistance of a cavity are obviously improved, the service life of the mold is prolonged by 2-4 times compared with a mold not subjected to co-diffusion, the surface brightness of the product is obviously improved, the service life of the mold is prolonged, and economic benefits are increased.

The present invention provides a method of manufacturing a crystalline silicon solar cell, subsequently comprising: providing a crystalline silicon substrate having a first side and a second side opposite the first side; pre-diffusing Phosphorus into a first side of the substrate to render a Phosphorus diffused layer having an initial depth; blocking the first side of the substrate; - exposing a second side of the substrate to a Boron diffusion source; heating the substrate for a certain period of time and to a certain temperature so as to diffuse Boron into the second side of the substrate and to simultaneously diffuse the Phosphorus further into the substrate.

The invention discloses a method for preparing a double-faced back contact solar cell, comprising following steps: (1) holing; (2) washing, and texturizing the front face and the back face of a silicon wafer; (3) arranging a first doping agent on the front face and in the hole of the silicon wafer, and arranging the first doping agent in the surrounding area of the hole in the back face of the silicon wafer, wherein the doping type of the first doping agent is opposite to that of the silicon wafer; (4) arranging a second doping agent in the non-hole surrounding area on the back face of the silicon wafer, wherein the doping type of the second doping agent is the same as that of the silicon wafer; (5) growing barrier layers on the front face and the back face of the silicon wafer; (6) annealing the silicon wafer at the temperature of 800 to 1000 DEG C, diffusing and making junctions; (7) etching peripheral junctions; (8) washing and removing the barrier layers; (9) arranging passivation anti-reflection films on the front face and the back face of the silicon wafer; and (10) arranging a porous metal electrode in the hole, printing and sintering. Adopting a method for arranging the doping agents, i.e. adopting the various type doping agents on two faces of the silicon wafer, the double-faced back contact solar cell realizes the co-diffusion of boron-phosphor in the presence of the barrier layers, thereby greatly simplifying process flows and reducing the production cost.