139results about How to "Diffusion barrier" patented technology

The invention relates to a small CPT atomic clock physical system, and belongs to the technical field of atomic frequency standard. The physical system comprises a laser portion and an atom air chamber portion. The laser portion comprises a VCSEL laser tube, an aperture diaphragm, and a [lambda] / 4 wave plate. The atom air chamber portion comprises an atom air chamber, a C field coil, a thermistor, a low electromagnetic film electric heating sheet, and a photoelectric detector. The C field coil uses a reverse Helmholtz coil structure to realize. Heating methods of the low electromagnetic film electric heating sheet and high-frequency AC electric heating are used to heat the atom air chamber. The system uses a vacuum heat insulation technology to package. The output frequency of the physical system is high in stability, stable in performance, small in volume, low in power consumption, and low in cost, and is especially suitable to be used for a glass type atom air chamber whose sealing port is on the central position of a cylindrical surface.

A method for the formation of copper wiring films includes the steps of forming a first copper film by means of a CVD method on an insulating diffusion barrier film, which insulating diffusion barrier film has been formed on a semiconductor substrate and in which a concavity has been established; heating the first copper film to a temperature within the range from 200 to 500° C.; and subsequently forming a second copper film on the first copper film by a plating method using the first copper film as an electrode.

The invention discloses a long-term heat and oxidation aging resistant polypropylene compound prepared in percentage by weight: 52%-89% of polypropylene resin, 10%-40% of inorganic filler, 0.1%-1% of beta nucleating agent, 0.5%-5% of stem grafting assistant, 0.2%-1% of antioxygen and 0.2%-1% of processing agent. A preparation method comprises the following steps of: evenly mixing each component, putting in a twin screw extruder for extrusion, enabling a temperature of the extruder to be 190-210 DEG C, enabling a rotating speed to be 50-400 circle / minute, cooling extrusion objects by using water, conducting sized dicing and obtaining the compound. The compound prepared by the preparation method has an excellent comprehensive mechanical property, has long-term heat and oxidation aging resistant characteristics, cannot pulverize after baking for 3000 hours in a 150-DEG C forced convection oven, and is widely applied to heat and oxidation aging resistant components of household appliances.

The invention discloses a preparation method of a titanium-steel composite plate, and belongs to the field of material processing. The preparation method of the titanium-steel composite plate comprises the steps that the surfaces of adopted titanium blanks and the surface of an adopted steel blank are treated, and then the surfaces of the titanium blanks are coated with paint and dried at the roomtemperature; the two titanium blanks with the surfaces being treated and coated with paint are aligned and stacked together, the steel blank is placed between the two titanium blanks, and then the blanks are assembled together symmetrically; the periphery of a composite blank is welded and sealed, and vacuumizing treatment is conducted; and the composite blank is placed in a heating furnace so asto be subject to heat treatment, then multi-pass rolling is conducted, the composite blank is air cooled after being rolled, and edge cutting, tension-straightening and flattening are conducted. According to the preparation method of the titanium-steel composite plate, the surfaces of the titanium blanks are coated with protective coatings, so that the titanium blanks are protected, the situationthat the composite performance is affected due to the fact that titanium with active chemical properties is oxidized and forms compounds with other elements is avoided, and the coatings are preparedfrom isolation paint which can prevent oxidization of titanium and prevent diffusion of harmful elements (such as C and N) at high temperatures.

The invention provides a quartz ceramic crucible for a polycrystalline silicon ingot. The quartz ceramic crucible comprises a crucible body, wherein the crucible body comprises a base and a side wall extending upward from the base, wherein a high-purity quartz coating is arranged on the inner surface of the inner surface and / or side wall of the base; and the material of the high-purity quartz coating comprises fused quartz, low-temperature quartz, silicon nitride and silicon in a mass ratio of 1:(0.1-2):(0-0.5):(0-0.5), 0-1000ppm of barium hydroxide and zirconium oxide by mass and less than or equal to 25% of adhesive by mass. In the crucible, the inner surface of the crucible body is coated with a high-purity quartz coating which is finally transformed into a high-density coating in an ingot casting process, thus impurities in the crucible are effectively prevented from dispersing into the ingot, red areas on the side and bottom of the ingot are reduced, overall ingot quality is improved, and the crucible preparation cost is lowered. The invention also provides a preparation method of the quartz ceramic crucible for a polycrystalline silicon ingot.

The invention discloses a display panel. The display panel comprises a substrate, an organic light-emitting unit and a thin film packaging layer. The substrate comprises a display area and a non-display area. The organic light-emitting unit is arranged in the display area of the substrate, and the thin film packaging layer covers the organic light-emitting unit. The thin film packaging layer at least comprises a first inorganic layer and a second inorganic layer. The thin film packaging layer covers the organic light-emitting unit. The display panel also includes a sealing member disposed around the display area. The sealing member is between the first inorganic layer and the second inorganic layer in the non-display area, and in contact with the first inorganic layer and the second inorganic layer. Through the melting and re-solidifying of the sealing member, the bonding between the first inorganic layer, the second inorganic layer and the sealing member can be enhanced. Therefore, water vapor and oxygen in the external environment can be prevented from diffusing into the display panel from an interface within the thin film packaging layer. The packaging effect of the thin film packaging layer is improved. The aging and the failure of light-emitting materials of the organic light-emitting unit are avoided, and the service life of the display panel is prolonged.

The invention provides an automatic control method of a kitchen ventilator, an intelligent flue gas sucking system and a flow guide system, which can realize the automatic control of smoke exhaust, prevent generated flue gas from dispersing and further realize the automatic control of smoke guide. The intelligent flue gas sucking system comprises a kitchen ventilator, a first wireless signal receiving device electrically connected with a start circuit of the motor of the kitchen ventilator, a wireless controller electrically connected with the first wireless signal receiving device through wireless signals and a first inducing device which is used for inducing lampblack and connected with the wireless controller. The intelligent flue gas flow guide system comprises a kitchen ventilator, a first wireless signal receiving device electrically connected with the motor of the kitchen ventilator, smoke guide equipment capable of stopping flue gas from dispersing, a second wireless signal receiving device electrically connected with the motor of the smoke guide equipment, a first inducing device for inducing lampblack, a second inducing device for inducing temperature or flames and a wireless controller.

The invention belongs to the field of lithium-sulfur batteries, and in particular relates to a lithium-sulfur battery electrode. The lithium-sulfur battery electrode is composed of a current collector and a coating layer. The coating layer has an n-layer structure, i.e. a first layer, a second layer...an n-th layer respectively from the current collector side to the coating layer surface, and n is an integer greater than or equal to 2. The sulfur content of each coating layer is a1%, a2%...an% respectively, and a1 is greater than or equal to a2, a2 is greater than or equal to...greater than or equal to an. The sulfur content is lower when the distance to the electrode surface layer is shorter, after lithium intercalation, the formed lithium sulfide content is correspondingly lower, and the fixation effect of the non-sulfur component substance on the sulfide is stronger. Thus, the difficulty for the lithium sulfide to move to the cathode side is larger, thus solving the problems that the lithium sulfide dissolves in the electrolyte solution and diffuses to the cathode side.

The invention discloses a high-corrosion-resistance four-layer aluminum alloy brazing plate. The high-corrosion-resistance four-layer aluminum alloy brazing plate is formed by hotly rolling a first cladding layer, a sandwich layer, a core layer and a second cladding layer, overlapped in sequence, after welding; the first cladding layer and the second cladding layer are AA4343 aluminum alloys; the sandwich layer is an AA3003 aluminum alloy; the core layer is a MOD3Z23 aluminum alloy; and the MOD3Z23 aluminum alloy comprises the following components in percentage by mass: 0.2-0.3% of iron, silicon not more than 0.2%, 0.4-0.5% of copper, 1.4-1.6% of manganese, 0.1-0.2% of titanium, and the balance of aluminum. The invention further discloses a manufacturing method of the four-layer aluminum alloy brazing plate. The four-layer aluminum alloy brazing plate obviously improves the corrosion resistance compared with a three-layer composite aluminum alloy brazing plate, and is excellent in mechanical performance.

The invention provides a steel / aluminum soldering method for a nickel-zinc-plated composite coating, and belongs to the field of dissimilar material connection. The steel / aluminum soldering method for the nickel-zinc-plated composite coating is characterized in that a nickel-plated layer with the thickness of 0.1-300 [mu]m is formed on the weld surface of steel base metal through electroplating; then a zinc-plated layer with the thickness of 0.1-300 [mu]m is formed on the weld surface of the steel base metal through electroplating; and finally, welding is conducted. In the welding process, diffusion of steel / aluminum is restrained through the nickel-plated layer, so that the reaction is relieved, and the mechanical property of a joint is improved by improving the metallurgical reaction; and in addition, the outer zinc-plated layer is melted and mixed with solder in the welding process, so that the spreadability of the solder on the steel base metal is remarkably improved, and soldering-flux-free welding is achieved. The high-quality joint is obtained.

The invention relates to an oriented multi-channel carbonized wood interlayer and a preparation method and an application thereof. The preparation method comprises the steps of cutting a birch trunk at different angles, immersing the birch trunk in a mixture of NaOH and Na2SO3 for hydrothermal reaction, cleaning, freeze-drying, pre-oxidizing, carbonizing and cutting. The carbonized wood interlayerhas stable electrochemical properties of carbon materials, can stably exist directly in a Li-S battery, also can improve the cycling stability of the Li-S battery, integrally improves the working efficiency of the Li-S battery, and has important scientific value and wide application prospect in the wearable field. The method is simple and easy to implement, environment-friendly, pollution-free, suitable for industrial production, and low in cost.

The invention relates to the technical field of semiconductor device manufacturing, and concretely relates to a wide-band gap III-V CMOS (Complementary Metal-Oxide-Semiconductor Transistor) strain field effect transistor which is based on a silicon substrate and combines an n channel transistor and a p channel transistor. The wide-band gap III-V CMOS strain field effect transistor adopts MOCVD or MBE equipment for epitaxial growth, and is formed by a first multilayer lattice strain buffer layer, a GaSb channel layer, an AlGaSb barrier layer, a GaSb cap layer, a second multilayer lattice strain buffer layer, an In0.53Ga0.47As channel layer, an In0.52Al0.48As barrier layer and an In0.53Ga0.47As cap layer sequentially epitaxial grown on the silicon substrate. According to the wide-band gap III-V CMOS strain field effect transistor provided by the invention, the migration rate of the p channel transistor can be effectively improved, the problem that the migration rate of the n channel transistor and the migration rate of the p channel transistor in III-V are different is solved, a wide-band gap III-V family transistor channel with high carrier speed and high drive current is provided, a short-channel effect brought during a transistor equal scaling-down process is effectively improved, the power consumption is reduced, the Moore law is overcome, the limitation is broken, and an equal scaling-down process of a semiconductor industry is maintained.

The invention discloses an automatic wire-feeding friction stir welding method for butt joint of dissimilar metal materials. The automatic wire-feeding friction stir welding method comprises the following steps that 1, welding pieces are in butt joint with each other and are clamped, an interval is formed between the welding pieces, strip-shaped welding wires are led out from a wire-feeding gun, a straightening wheel set, a pre-buried wheel and a leveling wheel are sequentially placed on the interval, the strip-shaped welding wires are straightened through the straightening wheel set, then obliquely downwards fed into the interval through the pre-buried wheel and later leveled through the leveling wheel, and the ends of the strip-shaped welding wires are arranged under a stirring head; 2, a welding machine is started, the stirring head starts vertical downwards feeding, later a stirring needle is pressed into the interval where the strip-shaped welding wires are stored, welding is started, and in the welding process, the wire-feeding speed keeps consistent with the welding speed; and 3, the stirring head is lifted, then wire feeding is stopped, and the strip-shaped welding wires are cut off. According to the automatic wire-feeding friction stir welding method for butt joint of the dissimilar metal materials, generation of chemical compounds between metal can be reduced, the interface temperature is decreased, the residual stress is reduced, a welding joint is prevented from generating holes, and the mechanical property and the welding efficiency of welding connectors are improved.

A method for the formation of copper wiring films includes the steps of forming a first copper film by a CVD method on a diffusion barrier film, which diffusion barrier film has been formed on a semiconductor substrate and in which a concavity has been established; heating the first copper film to a temperature within the range from 200 to 500° C.; and subsequently forming a second copper film on the first copper film by a plating method using the first copper film as an electrode.

The invention relates to the field of paint, and discloses inorganic high-temperature fused salt corrosion resistant graphene paint. The inorganic high-temperature fused salt corrosion resistant graphene paint comprises the following raw materials in parts by weight: 45-55 parts of a high temperature adhesive, 3-10 parts of a graphene dispersing liquid, 5-15 parts of corrosion-proof filling, 8-18parts of a lamellar material, 2-8 parts of a flexibilizer and 10-20 parts of deionized water, wherein the high temperature adhesive comprises one or a combination of aluminum dihydrogen phosphate, magnesium biphosphate, zinc dihydrogen phosphate, chromium aluminum phosphate and zircon collosol; the graphene dispersing liquid comprises the following ingredients: graphene powder, a dispersing agentand deionized water; the corrosion-proof filling comprises one or a combination of aluminum triphosphate, chromium oxide and zinc phosphate; the lamellar material comprises one or a combination of hexagonal boron nitride, flake aluminum and sericite; and the flexibilizer comprises at least one of a zirconia fiber and a silicon oxide fiber.

The invention relates to the technical field of batteries, and provides a battery module and a battery pack. The battery module comprises a shell and a battery cell group arranged in the shell, the battery cell group comprises a plurality of battery cell monomers stacked in sequence, each battery cell monomer comprises a tab and a battery cell main body, and the tab and the battery cell main bodyare in sealed connection to form a tab edge sealing part; the shell comprises a tab bracket for fixing a tab of each battery cell monomer, the battery module further comprises a plurality of fireproofheat-insulating bodies which are sequentially arranged along the stacking direction of each battery cell monomer, and each fireproof heat-insulating body is propped between the tab bracket and a battery cell main body of the corresponding battery cell monomer. A heat insulation gap allowing the tab edge sealing part of the corresponding battery cell monomer to be inserted is formed between everytwo adjacent fireproof heat insulation bodies, and the fireproof heat insulation bodies can effectively prevent high-temperature gas or flame from diffusing in the stacking direction of the battery cell monomers, so that the combustion speed in the battery module is reduced. The use safety performance of the battery module is effectively improved.

The invention discloses a flame-retardant cable material. The flame-retardant cable material comprises the following raw materials in parts by weight: 60-85 parts of polypropylene, 10-35 parts of SEBSresin, 2-8 parts of LDPE, 5-15 parts of maleic anhydride grafted polypropylene, 0.2-1.0 part of pentaerythritol stearate, 1-6 parts of magnesium stearate, 20-35 parts of light calcium carbonate, 15-25 parts of magnesium hydroxide, 5-10 parts of modified hydrotalcite, and 10-20 parts of modified ammonium polyphosphate. The prepared cable material has good mechanical properties and flame-retardantproperties through synergistic reinforcement and flame retardancy.

The invention relates to the technical field of semiconductor device production and specifically relates to a wide band gap III-V CMOS type persudomorphic heterojunction field effect transistor which is based on a silicon substrate and combines an n channel transistor and a p channel transistor. According to the heterojunction field effect transistor, a material is epitaxially grown through adoption of an MOCVD or MBE device. The heterojunction field effect transistor is composed of a first multilayer lattice strain buffer layer, an InGaSb channel layer, an AlGaSb barrier layer, a GaSb cap layer, a second multilayer lattice strain buffer layer, an InGaAs channel layer, an AlGaAs barrier layer and an In<X>Ga<1-X>As cap layer which are epitaxially grown on a high resistivity silicon substrate in sequence. According to the transistor, a migration rate of the p channel transistor can be effectively improved, so the problem that great difference exists between the migration rates of the n channel transistor and the p channel transistor in the III-V is solved; a wide band gap III-V transistor channel with high carrier speed and a high drive current is provided; the short channel effect resulting from an equal-proportion reduction process of the transistor is effectively improved; the power consumption is reduced; the Moore's law is overcome; a limit is broken; and the equal-proportion reduction process of a semiconductor industry is maintained.

The invention relates to the technical field of engineering plastics, and discloses modified engineering plastic and a preparation method thereof. The engineering plastic comprises the following components: in parts by weight, 80-90 parts of PC resin, 4-6 parts of a stabilizer, 2-5 parts of a toughening agent, 5-10 parts of a lubricant and 3-5 parts of an antioxidant BHT, and a halogen-free flameretardant is also included, and comprises 7-10 parts of p-aminophenyl boronic acid and 3-6 parts of magnesium hydroxide. The modified engineering plastic has the following advantages that a synergistic flame retardant effect is achieved by magnesium hydroxide and p-aminophenyl boronic acid, on the one hand, the amount of magnesium hydroxide can be reduced, and on the other hand, a double-layer flame retardant structure is formed through a magnesium oxide protective film and a B-O-C carbon layer, so that a better flame retardant effect is achieved.

The invention relates to a composite diaphragm for an alkali metal battery and a preparation method of the composite diaphragm. The composite diaphragm comprises an organic diaphragm matrix layer coated with a ceramic coating and an amorphous alkali metal ion conductor inorganic solid layer, and the preparation method is a vacuum physical deposition method and comprises the following steps of passing an organic diaphragm substrate through a vacuum deposition cavity in a roll-to-roll mode, wherein the vacuum degree of a vacuum box body is 0.5-5 Pa, the reaction gas is nitrogen, the deposition power supply power is 30-180 W, the deposition time is 5-30 min; and depositing to prepare the composite diaphragm. The deposited inorganic solid layer is compact and non-porous, so that the diaphragmhas very strong mechanical property and high-temperature resistance, and the internal short circuit caused by the battery impurities and the metal dendrites and the thermal deformation of the batterydiaphragm can be effectively prevented. Meanwhile, the inorganic solid layer has the alkali metal cation high-speed conduction performance, stability in air and a hetero-ion blocking function, so thatthe safety performance and the cycle life of the battery can be remarkably improved.

The invention discloses a permeable closed amphoteric emulsion for a primer. The amphoteric emulsion is prepared from the following raw materials in parts by weight: 50 to 110 parts of deionized water; 10-60 parts of styrene, 5 to 20 parts of n-butyl acrylate; 5-20 parts of iso-octyl acrylate, 2-5 parts of an emulsifier, 2-5 parts of glycidyl methacrylate, 2-5 parts of dodecyl methacrylate, 2-5 parts of methyl erucate, 2-5 parts of a cationic monomer, 2-5 parts of an anionic monomer, 0.5-2.5 parts of a crosslinking monomer, 1-5 parts of a hydrophilic monomer and 0.5-2 parts of an initiator. The emulsion is zwitter-ionic amphoteric emulsion for permeable closed primer, and has excellent paint preparation stability, excellent permeation reinforcing performance and salt and alkali flooding resistance.

The invention provides a ceramic substrate and a manufacturing method thereof. The ceramic substrate comprises a ceramic main body and a flat buffer layer configured on the ceramic main body, and the thermal expansion coefficient CTEm of the ceramic main body and the thermal expansion coefficient CTEp of the flat buffer layer meet the relational expression (1): the absolute value of CTEm minus CTEp is not less than 3 multiplied by 10-6 / DEG C, thereby maintaining the warpage of the ceramic substrate below 0.5%.

The invention discloses a modified graphene enhanced waterborne FEVE fluorine-carbon flexible protection paint. The modified graphene enhanced waterborne FEVE fluorine-carbon flexible protection paintis prepared from waterborne FEVE fluorine-carbon resin, a low-surface-energy auxiliary agent, a curing agent, a diluent and a grafting modified graphene function filler. According to the modified graphene enhanced waterborne FEVE fluorine-carbon flexible protection paint, through a silane coupling agent gamma-aminopropyl triethyl silicane, graphene is subjected to grafting modification, and the wettability of the graphene is effectively improved, so that the graphene is uniformly dispersed in a paint system; the grafting-modified graphene of a flaky structure is uniformly dispersed, stacked layer by layer and staggered in the waterborne FEVE fluorine-carbon resin to form a tight physical shielding structure, and water molecules and atmospheric corrosion mediums are effectively isolated from permeating a circuit board substrate or being diffused into the circuit board substrate; meanwhile, through the further combination of excellent low surface energy and hydrophobic properties of thefluororesin, the prepared protection paint has the functions of resisting water, dampness and salt-spray corrosion, and it is guaranteed that the protection paint has high reliability under extreme working conditions of high temperature, high humidity and high salt-spray corrosion.

The invention relates to a corrugated aluminum sheath high-voltage power cable resistant to buffer layer ablation. The allowable separation contact distance between a corrugated aluminum sheath and aninsulation shielding layer is obtained through calculation by combining the structure and material parameters of the cable and is used as the maximum distance between the semi-conductive cushion blocks. The problem of cable faults caused by ablation of the cable buffer layer is solved on the basis of not changing the original structure and material of the cable. Materials of the semi-conductive cushion blocks are easy to obtain. The structure is simple, and the water blocking function of the buffer layer is reserved. Due to structural interference fit of the semi-conductive cushion blocks, water can be effectively prevented from diffusing in the cable, and the dual water blocking function is achieved. By controlling the thickness of the semi-conductive cushion blocks, the bending performance of the cable is not influenced, and the compression damage resistance of the cable can be improved to a certain extent.

The invention discloses a hydrogen respirator which comprises a water storage tank used for storing water, a hydrogen generating device used for generating hydrogen, and a power supply device. The hydrogen generating device comprises an electrolysis chamber. The electrolysis chamber is internally provided with a cathode piece, an anode piece and a water-permeating gas-separation film arranged between the cathode piece and the anode piece. The cathode piece and the anode piece define an electrolysis area. The water-permeating gas-separation film is used for partitioning the electrolysis area into a hydrogen generating area and an oxygen generating area. The water storage tank communicates with the oxygen generating area, and the hydrogen generating area is used for gathering hydrogen which is then exhausted. The power supply device is electrically connected with the anode piece and the cathode piece. According to the hydrogen respirator provided by the invention, water provided by the water storage tank enters the electrolysis chamber to be electrolyzed, hydrogen generated by the cathode piece is gathered in the hydrogen generating area, oxygen generated by the anode piece is gathered in the oxygen generating area, the water-permeating gas-separation film blocks diffusion of the hydrogen into the oxygen generating area and diffusion of the oxygen into the hydrogen generating area, the hydrogen and the oxygen are separated in this way, the prepared hydrogen is purified, and a better purity is guaranteed.

The invention discloses a flame retardant electroplating PC / ABS alloy material for an automobile. The flame retardant electroplating PC / ABS alloy material for the automobile is prepared from the following raw materials in parts by weight: 35 to 45 parts of low flow PC resin, 25 to 35 parts of high flow PC resin, 8 to 15 parts of ABS resin, 15 to 25 parts of modified mineral fibers, 10 to 15 parts of nickel-plated carbon fibers, 2 to 8 parts of compatibilizer, 10 to 15 parts of composite flame retardants and 1 to 3 parts of processing aids, wherein the melt index of the low flow PC resins (300 DEG C, 1.2kg) is 3 to 9g / 10min, and the melt index of the low flow PC resins (300 DEG C, 1.2kg) is 20 to 40g / 10min. The invention also discloses a preparation method of the flame retardant electroplating PC / ABS alloy material for the automobile. According to the flame retardant electroplating PC / ABS alloy material for the automobile and the preparation method thereof, the plating effect of the PC / ABS alloy material for the automobile is improved and the flame-retardant performance of the PC / ABS alloy material is improved through the reasonable selection of the raw material components and the scientific ratio of the component dosage, a preparation process is easy to control, and the competitiveness of the PC / ABS alloy material in the automotive material market is improved.

The invention discloses a tunnel junction structure, a forming method thereof and a tunnel junction device. The structure comprises a first semiconductor layer, wherein Te ions are arranged in the first semiconductor layer; a second semiconductor layer, wherein the conductive type of the second semiconductor layer is opposite to that of the first semiconductor layer; and a non-doped quantum well layer located between the first semiconductor layer and the second semiconductor layer, wherein the non-doped quantum well layer is suitable for blocking Te diffusion. The tunneling peak current of thetunnel junction structure of the tunnel junction structure is improved.

The invention provides a hydrogen-rich water generator with a pressure relief function. The hydrogen-rich water generator with the pressure relief function comprises a water cup, a pressure relief valve and a hydrogen production device. The pressure relief valve is used for releasing surplus hydrogen in the hydrogen-rich water generator. The hydrogen production device comprises a shell, a water cup connection part and a hydrogen and oxygen separation assembly, wherein the water cup connection part is arranged on one side of the shell, and the hydrogen and oxygen separation assembly is arranged in the shell. The hydrogen-rich water generator not only can achieve electrolysis of water and hydrogen and oxygen separation, but also can release gas insoluble in water in time, so that the situation that hydrogen is extensively gathered and consequently potential safety hazards are caused is avoided.

The invention relates to a method for restoring an ionic rare earth ore ammonium salt leaching site, which comprises the steps of carrying out primary leaching by using a calcium and / or magnesium-containing salt solution and carrying out secondary leaching by using a calcium-containing alkaline aqueous solution or slurry, so that reinforced leaching of residual ammonium salt in the ammonium salt ore leaching site, controllable adjustment of the pH value, in-situ chemical curing of sulfate radicals and rapid regulation and control of the content of calcium and magnesium nutrient elements can be achieved, the used leaching water amount is small, the leaching period is short, the leaching effect is good, the technology is simple, the cost is low, and a solid technical guarantee can be provided for ion type rare earth ore ammonium salt leaching site restoration and eco-friendliness.

The invention discloses an anti-oxidation treatment technology before steel structure material heat treatment. The anti-oxidation treatment technology specifically comprises the following steps of (1)steel structure material pretreatment, (2) steel structure material roughening treatment, and (3) steel structure material surface spraying treatment. According to the anti-oxidation treatment technology, by processing a steel structure material, on the premise that the strength of the steel structure material meets the industrial requirement, the grain size of the steel structure material is increased as much as possible, the surface height of the steel structure material is made to be different, and accordingly, the surface roughness of the steel structure material is improved; then, spraying powder is sprayed onto the surface of the steel structure material, an anti-oxidation coating is formed, oxygen is stopped from scattering into the steel structure material, and the situation thatthe steel structure material oxidizes in the heat treatment process, and oxide scale is generated is effectively prevented; and in addition, the corrosion resistance and the abrasion resistance of thesteel structure material can be improved through the coating subjected to heat treatment, influence on direct using or follow-up machining of workpieces is avoided, and the wide application prospectis achieved.