87results about How to "Chemically stable" patented technology

The utility model relates to aluminium solution capacitor technical field, and disclose a kind of heat dissipation type high temperature resistant aluminium solution capacitor, including electrolytic capacitor main body and the two pins of installation in electrolytic capacitor main body one end, the outer wall of electrolytic capacitor main body middle portion is equipped with and is fixedly connected with connecting ring, the outer wall of connecting ring is connected with two support assemblies, the other end of two support assemblies is connected with extension assembly, the other end of two extension assemblies is connected with rotating assembly, the inside of two rotating assemblies is connected with cooling plate, the inside of two cooling plates is connected with cooling liquid cavity filled with cooling liquid. This kind of heat dissipation type high temperature resistant aluminium solution capacitor, by setting cooling plate and cooling liquid cavity, cooling liquid (such as transformer oil) filled in cooling plate interior has good thermal conductivity, and chemical property is stable (not with aluminium reaction, long-term sealing does not oxidize), can pass through directly contacting electrolytic capacitor main body surface, quickly absorb the heat generated when working, reduce internal temperature.

The application provides a porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction and a preparation method. The preparation method comprises the following steps: adding 4,4-diamino diphenyl ether and pyromellitic dianhydride into a solvent, uniformly mixing, and preparing a polyamide acid precursor spinning solution; electrospinning the prepared polyamide acid precursor spinning solution to prepare polyamide acid nanofibers; immersing the prepared polyamide acid nanofibers in a mixed metal salt solution containing cobalt salt, lanthanum salt and zinc salt to prepare polyamide acid nanofiber precursors loaded with metal ions; and performing programmed temperature heat treatment on the prepared polyamide acid nanofiber precursors loaded with metal ions in a protective atmosphere to prepare the porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction. The prepared porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction has excellent electrochemical oxygen reduction reaction and oxygen evolution reaction bifunctional catalytic activity.

The invention discloses a method for synthesizing nano magnesium dititanate by a solid phase method, which comprises the following steps: S1, weighing a titanium-containing solid compound, a nano magnesium oxide solid and a hydrolytic alkaline solid compound, uniformly mixing, adding a surfactant, and grinding to obtain a solid mixture; s2, adding a mixed solution with an alcohol-water ratio of 1: 1 into the solid mixture, and grinding to obtain mixed slurry; s3, transferring the mixed slurry into a centrifugal tube, placing the centrifugal tube in a centrifugal machine for centrifugal separation, pouring out supernatant after the centrifugal separation is finished, and obtaining a mixed product after a water washing process and an alcohol washing process are finished; s4, soaking the mixed product in an inorganic acid solution, transferring the soaked mixed product into a centrifugal tube for centrifugal separation, sequentially completing water washing and alcohol washing processes, and then drying to obtain MgO-coated TiO2 with a core-shell structure; s5, carrying out high-temperature calcination on the obtained MgO-coated TiO2 to obtain a nano magnesium dititanate solid; according to the invention, the problems of large particle size and non-uniform chemical composition of the magnesium dititanate powder prepared in the prior art are solved.

The invention discloses an interfacial film, a preparation method thereof and an application of the interfacial film in assembly of a lithium ion battery, the interfacial film comprises the following components: lithium salt, polyvinylidene fluoride and 1-butyl-2, 3-dimethyl imidazole onium chloride, the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is about 1: 0.9-1.1: 0.9-1.1, preferably about 1: 0.95-1.05: 0.95-1.05, and the mass ratio of the lithium salt to the polyvinylidene fluoride to the 1-butyl-2, 3-dimethyl imidazole onium chloride is 1: (0.9-1.1): (0.9-1.1), preferably about 1: (0.95-1.05). The weight-average molecular mass of the polyvinylidene fluoride is about 90-110 thousand g / mol, the lithium salt is lithium bis (trifluoromethanesulfonyl) imide (LiTFSI) and / or lithium bis (fluorosulfonyl) imide (LiFSI), the purity of the lithium salt is greater than 99.9%, the polyvinylidene fluoride (PVDF) is selected as a polymer matrix, and is compounded with the ionic liquid 1-butyl-2, 3-dimethyl imidazolium chloride (BMMImCl) and the lithium salt, so that the performance of the lithium ion battery is improved. According to the present invention, the novel interfacial film is prepared, and the interfacial film has characteristics of high temperature resistance, chemical stability, excellent ion transmission characteristic, excellent lithium ion adsorption capacity, excellent performance, and wide application prospect in the lithium battery field.

The invention relates to the technical field of chemical material preparation, and particularly discloses a safe preparation method of a short fluorocarbon alkyl sulphobetaine surfactant, a product and application, and the safe preparation method comprises the following steps: (1) in a solvent system I, reacting epoxy chloropropane with secondary amine to obtain an intermediate 1; (2) in a solvent system II, reacting the intermediate 1 with sodium hydrosulfide or a hydrate thereof to obtain an intermediate 2; (3) reacting the intermediate 2 with short fluorocarbon alkyl iodide to obtain perfluoroalkyl thioether propyl tertiary amine; and (4) carrying out sulfonation treatment on perfluoroalkyl thioether propyl tertiary amine to obtain the short-fluorocarbon alkyl sulphobetaine surfactant. According to the invention, by designing a synthetic route without using a high-risk reagent, the safety and operability of the process are remarkably improved, and the sulphobetaine surfactant with excellent acid, alkali and salt chemical stability and excellent surface activity is successfully prepared; and a key material and a safe and reliable preparation process are provided for development of a new-generation efficient environment-friendly fire extinguishing agent.

The utility model relates to the technical field of silicon powder heating, specifically relates to a heating device for powder purification of direct pulling method, including heating block, the lower part of heating block is provided with the footboard, the footboard is connected with heating block through the connecting device, the connecting device includes the connecting hole of setting at the top of footboard, the bottom of connecting hole is provided with the plug pipe, a plurality of expansion joints are provided on the pipe body of plug pipe, improve the fixed effect of connection, guarantee the safe use, prolong the life, reduce the production cost.

The invention discloses a low-expansion three-temperature cold and hot plate and a preparation method, and belongs to the field of precise alloy components. The cold and hot plate is made of titanium-niobium-based alloy, the titanium-niobium-based alloy comprises, by atomic percent, 25%-35% of Nb, the total content of V and / or Ta smaller than or equal to 3% and the balance Ti, the titanium-niobium-based alloy comprises a three-temperature structure of a low-temperature adaptation area, a normal-temperature stable area and a high-temperature tolerance area, the thickness of the titanium-niobium-based alloy ranges from 1.5 mm to 2 mm, and the surface of the titanium-niobium-based alloy is provided with a nitride layer or a passive film. The preparation method comprises the steps of burdening, 2-3 times of vacuum consumable smelting, hot forging, hot rolling, partition cutting, pre-deformation regulation and control, solid solution quenching, cold rolling finishing, splicing forming and the like, and vacuum stress relief annealing and dual performance detection are matched. The method is suitable for scenes such as chip packaging and precision detection, and is low in cost and high in qualified rate.

This utility model relates to the field of auxiliary equipment for construction engineering, and discloses a portable material classification, storage, and transportation box for construction engineering. The box includes a storage box with two fixed plates fixedly connected to its bottom inner wall. A motor is fixedly connected to the inner wall of one of the fixed plates, and a gear is fixedly connected to the drive end of the motor. Connecting rods are rotatably connected inside both fixed plates, and a gear is fixedly connected to the outer wall of one of the connecting rods. Transmission plates are fixedly connected to the outer walls of both connecting rods, and connecting rods are fixedly connected to the inner walls of both transmission plates. This utility model reduces the corrosion of the box material by rainwater and acidic or alkaline liquids such as construction site concrete slurry, prevents aluminum alloy oxidation and steel plate rusting, maintains structural strength, and the sealed structure reduces the leakage of volatile gases while preventing the intrusion of external corrosive gases, ensuring the chemical stability of the materials.

The invention provides a green, environment-friendly, efficient and mild detergent and a preparation method and application thereof, and belongs to the technical field of detergents. Comprising the following raw materials in parts by weight: 10 to 20 parts of a mild surfactant, 5 to 8 parts of an auxiliary surfactant composition, 1 to 2 parts of a plant extract, 0.5 to 1 part of vitamin C, 0.1 to 0.3 part of vitamin E, 0.2 to 0.5 part of vitamin B5, 0.005 to 0.007 part of essence, 0.1 to 0.3 part of EDTA (Ethylene Diamine Tetraacetic Acid) disodium and 60 to 80 parts of deionized water. The prepared green, environment-friendly, efficient and mild detergent is good in foaming effect, stable in chemical property, mild, low in toxicity, good in washing effect and good in degradability, due to addition of the auxiliaries, the sense of the detergent is smoother, the fragrance of the detergent is more loved, and the detergent has wide application prospects.

The portable graphene seedling raising shed has the advantages that the graphene composite support rod is adopted, the support rod is used as a heating device while supporting, the support rod itself is changed into an efficient and uniform heating body, stable and controllable heat supply is provided for the inside of the seedling raising shed, the spraying assembly arranged in the shed is convenient for watering and realizes intelligent control, the portable graphene seedling raising shed can be used for small-scale and family type seedling raising and cultivation in winter, has the characteristics of being light, capable of being quickly folded or stretched, and convenient for users to carry, transport and quickly deploy at different sites.

This invention discloses a helium leak detection system and method for supercapacitors. The system includes a sealed leak detection chamber, a vacuum pumping unit, a helium supply and recovery unit, and a helium mass spectrometer leak detector. The hollow sealed leak detection chamber is used to hold the capacitor to be tested. The sealed leak detection chamber is connected to the vacuum pumping unit, the helium supply and recovery unit, and the helium mass spectrometer leak detector. The vacuum pumping unit is used to perform a vacuum pumping operation inside the sealed leak detection chamber. The helium supply and recovery unit is used to fill the sealed leak detection chamber with a mixture of helium and nitrogen gas, and to recover and store the helium in the mixture. The helium mass spectrometer leak detector is used to detect the change in helium concentration in the sealed leak detection chamber in real time and convert the detected helium concentration signal into leak rate data. This invention is scientifically designed, has high detection accuracy, and can accurately detect the sealing performance of capacitors, determine whether there is a leakage problem, improve detection efficiency, and reduce detection costs.

This utility model provides an immersion thermal management system, comprising: a working chamber for housing a heating element; a cooling unit array located within the working chamber, the cooling unit array comprising multiple cooling units arranged at intervals, each cooling unit containing a flowing cooling liquid, the heating element being located between adjacent cooling units; a first heat exchanger connected to the cooling unit array via a liquid pipeline for cooling the cooling liquid; and a gas source connected to the working chamber via a gas pipeline for supplying a high thermal conductivity gas to the working chamber, the heating element being immersed in the high thermal conductivity gas, the high thermal conductivity gas flowing within the working chamber, transferring the heat generated by the heating element to the cooling units, thereby cooling the heating element.

This invention discloses a tensile-strength steel-cored aluminum stranded wire, relating to the technical field of steel-cored aluminum stranded wire. The tensile-strength steel-cored aluminum stranded wire of this invention comprises at least: a steel core; a Zn-Ni-WC composite coating, electroplated on the steel core; aluminum strands, stranded on the steel core coated with the Zn-Ni-WC composite coating; and an anti-corrosion coating applied to the stranded aluminum strands. The anti-corrosion coating comprises the following raw materials in parts by weight: 60-70 parts of long-chain modified polyurethane acrylate prepolymer; 25-30 parts of acrylate isoborneol ester; 15-20 parts of dopamine-modified sustained-release microcapsules; 2-5 parts of photoinitiator; 0.5-1.5 parts of leveling agent; and 0.5-1.5 parts of dispersant. This invention, by setting a Zn-Ni-WC composite coating on the steel core and an anti-corrosion coating on the steel-cored aluminum strands, enables the prepared tensile-strength steel-cored aluminum stranded wire to possess superior corrosion resistance and ultra-long-term tensile strength retention.

The invention relates to the technical field of precious metal metallurgy, and discloses a high-density iridium ingot sedimentation type smelting process which comprises the following steps: preparing a water-cooled copper crucible with a zirconium oxide inner wall coating; iridium powder and calcium oxide powder are mixed and put into a crucible; performing induction heating in a vacuum environment until the raw materials are molten; protective gas is inflated, periodic variable-pressure oscillation operation is applied under the condition that the temperature of the melt is kept, and slag crust on the surface of the melt is destroyed through pressure fluctuation and deep gas is promoted to be exhausted; after oscillation is stopped, the melt is left to stand, and a slag system floats upwards and is separated; and establishing a bottom-to-top temperature gradient to control directional solidification of the melt. According to the invention, oxide hard shells are destroyed through a variable-pressure oscillation mechanism, and efficient degassing and impurity removal are realized by cooperating with calcium oxide slagging; the zirconia coating effectively prevents the crucible material from being polluted; the directional solidification and hot isostatic pressing process eliminates internal shrinkage cavities and looseness. According to the process, the impurity content in the iridium ingot is remarkably reduced, and the purity and compactness of the material are improved.

The application provides a cation exchange membrane and a preparation method and application thereof, and belongs to the technical field of cation exchange membranes.The method provided by the application is free of volatile organic compounds, toxic and harmful monomers or heavy metal components, and the raw material itself is environmentally friendly.The method is free of harmful gas emission and hazardous waste generation, and is environmentally friendly.The cation exchange membrane material prepared by the method is chemically stable, easy to recycle after being discarded, free of additive precipitation during use, and free of pollution to the treatment system.The water-soluble dispersion bonding medium adopted by the application forms rich and uniform connected pore structures in the cation exchange membrane after being washed by water, greatly reduces ion migration resistance, significantly alleviates membrane polarization, and improves ion exchange rate and energy utilization efficiency when used for separation.The method provided by the application is free of complex chemical reactions, harsh process conditions, and standardized operation steps, and is easy to realize large-scale continuous production.

The invention belongs to the technical field of material performance detection, and discloses a calibration device and method of a methylene blue standard solution for a machine-made sand MB value test, which can quickly judge the deviation degree of the concentration of the methylene blue solution, improve the accuracy of the concentration of the methylene blue solution and improve the accuracy of the MB value test. The stable property of the standard substance for calibration can ensure that the detection result of the engineering sand is accurate in a long time span, so that the engineering quality is ensured.

The invention discloses a quantum dot polarized photoelectric detector and a preparation method and application thereof, and relates to the technical field of photoelectric detection. The quantum dot polarized photoelectric detector comprises a substrate, a gold layer, an aluminum oxide layer, a patterned gold layer 1, a ZnO quantum dot layer and a patterned gold layer 2 which are sequentially arranged from bottom to top. According to the quantum dot polarization photoelectric detector, polarization detection of ultraviolet light can be achieved, polarization characteristics (polarization direction, polarization degree and polarization state distribution) of the ultraviolet light are captured, efficient detection of polarization state light of a specific wave band by the quantum dot polarization detector is achieved, and absorption of the light at 220-320 nm is enhanced.

The utility model relates to lithium ion battery technical field discloses a high solid content type lithium manganate production manganese dioxide chlorine element removal device, including mounting bracket and rotating plate rotation connection in the left and right sides of the inner wall of mounting bracket, still include: fixed in the left side of mounting bracket motor, and the output shaft of motor penetrates mounting bracket and is fixedly connected between the left rotating plate, the utility model has multiple dehydration function, this device can first to the wet manganese dioxide filter cake extrusion dehydration, can remove the large amount of free water in filter cake in advance, greatly reduce the water content required to remove subsequent drying, then continue to the wet manganese dioxide filter cake and rotate drying treatment, make the wet manganese dioxide filter cake and hot air can fully contact, accelerate the moisture evaporation rate, further improve the drying efficiency, effectively avoid the manganese dioxide oxidation problem caused by local temperature too high, guarantee the chemical property stability of manganese dioxide, ensure that the product quality is not influenced.

The application belongs to the field of steel material and its preparation technology, and discloses a high strength and toughness steel plate for liquid hydrogen storage and transportation and a preparation method thereof. The mass percentage of each chemical component is controlled and the film-like reversed austenite formation tendency index is satisfied. Through reasonable component proportioning, high cleanliness smelting, continuous casting, rolling and heat treatment synergic control, a dual-phase structure of tempered martensite and film-like reversed austenite is obtained, the volume fraction of the film-like reversed austenite is 8% to 20%, and the volume fraction of the block or island-like reversed austenite is not more than 3%. The steel plate has the room temperature yield strength of greater than or equal to 600 MPa, the tensile strength of greater than or equal to 750 MPa and the impact energy of greater than or equal to 70 J at-253 DEG C in the thickness range of 6 to 50 mm, the structure and performance in the thickness direction are uniform, the steel plate has high strength, super-low temperature high toughness and excellent hydrogen damage resistance, and is suitable for liquid hydrogen storage tanks and related low-temperature pressure vessels.

The invention discloses a phosphonic acid group modified phenazine negative electrode electrolyte as well as a preparation method and application thereof, and relates to the technical field of flow batteries. The phenazine negative electrode electrolyte has a structure shown in the specification, wherein R, R1, R2, R3, R4, R5 and R6 are respectively one of-H,-OCH3,-OCnH2nCH3,-Me,-F,-Cl,-Br,-I,-CnH2nCH3,-OCnH2nPO3H2 and-CnH2nPO3H2, at least one of R, R1, R2, R3, R4, R5 and R6 is-OCnH2nPO3H2, and n is a positive integer. The phenazine negative electrode electrolyte material disclosed by the invention realizes relatively high solubility, stable chemical properties and physical properties and relatively high battery cycle stability, and is suitable for near-neutral aqueous organic salt cavern flow batteries.

The invention discloses artificial saliva and a preparation method of artificial saliva hydrogel. The artificial saliva is prepared from the following raw materials in parts by mass: 0.5 to 1 g of KCl, 0.2 to 0.4 g of K2HPO4, 0.2 to 0.8 g of NaCl, 0.2 to 0.4 g of KH2P O4, 10.04 to 20.8 g of CaCl2, 1.5 to 3 g of Nacaboxymethlecellulose, 60 to 120 mg of brown moss alcohol, 495 to 1000 ml of natural coconut juice and 5 to 10 ml of herba sarcandrae extract. By selecting the glabrous sarcandra herb extract, anti-inflammatory and anti-tumor treatment is realized, so that the traditional Chinese medicine composition has a remarkable effect on dry mouth caused by radiotherapy; through the form of a gel bead preparation, the beverage is more portable and unique in taste. The gel beads serve as one of oral local administration preparations, and after the gel beads are exploded, drugs can target small glands which are located below oral mucosa and secrete saliva, and the rapid drug effect is achieved. Direct local administration to the oral mucosa may provide rapid drug action, activate small salivary glands within the buccal mucosa, while avoiding systemic drug exposure and off-target effect.

The invention relates to a preparation method of a nickel-based electrode and a method for electrocatalytic oxidation of 5-hydroxymethylfurfural (HMF) by using the nickel-based electrode. The nickel-based electrode comprises a substrate material and a catalyst layer, and the catalyst layer is nickel hydroxide in different forms or chromium-doped nickel hydroxide. According to the chromium-doped nickel hydroxide electrode, the catalytic performance of electrooxidation of HMF into 2, 5-furandimethyl (FDCA) can be greatly improved. Taking the nickel-based electrode as an anodic oxidation electrode, taking metal platinum as a cathode electrode, respectively filling two sides of a double-chamber electrolytic cell separated by an ion exchange membrane, adding an alkaline electrolyte into two sides of the electrolytic cell, and adding an HMF solution into the anode side; the electrocatalytic oxidation method is carried out in the electrolytic cell under a certain voltage, the anode is subjected to an HMF electrooxidation reaction and is converted into FDCA, and the cathode is subjected to an electrolytic water hydrogen evolution reaction. The nickel-based catalyst can efficiently electro-catalyze HMF to be oxidized into FDCA, meanwhile, the electrolytic water hydrogen evolution reaction is coupled, and the nickel-based catalyst has excellent catalytic efficiency and stability.

The utility model belongs to corrugated paperboard technical field especially relates to a kind of high buffering environment-friendly corrugated paperboard, intermediate layer is the core support foundation of corrugated paperboard, corrugated paper layer is set on the upper surface of intermediate layer, corrugated paper layer uses common corrugated structure, base plate is laid on the upper surface of corrugated paper layer, on the one hand can be combined with corrugated paper layer tightly, enhance the stability of corrugated paper layer structure, buffer layer is set on the upper surface of base plate, it is the key structure of realizing high buffering performance, upper surface layer covers on the upper surface of buffer layer, upper surface layer as the upper surface of corrugated paperboard, can protect buffer layer from the direct influence of external environment, support layer is set on the lower surface of intermediate layer, can provide stronger support force and stability, lower surface layer is laid on the lower surface of support layer, lower surface layer as the lower surface of corrugated paperboard, can protect support layer from external wear and environmental influence, ensure the structural stability and support performance of support layer.

The invention relates to a convex high-reflection concave low-reflection color blindness correction lens and a preparation method thereof. It solves the problems of limited design freedom, excessive number of film layers and stress in the prior art. It comprises a transparent lens substrate, a high-reflection film layer formed on the convex surface and a high-transmission film layer formed on the concave surface. The convex high-reflection film layer adopts a multilayer composite structure of silver and silicon dioxide, and through accurate control of the thickness of the silver layer and the matching of the dielectric layer, selective reflection and attenuation of specific color light are realized; the concave high-transmission film layer adopts a multilayer dielectric interference film system design of titanium dioxide and silicon dioxide, realizing accurate transmission and spectral shaping of each waveband. The advantages of the invention are: breaking through the design limitations of traditional single-sided coating, adopting a double-sided asymmetric film system synergistic control strategy, realizing higher spectral selectivity, lower stray light, more natural lens appearance and standardized production of eight types of clinical prescriptions.

The invention belongs to the technical field of oil exploitation, and particularly relates to a dry powder thickening agent for fracturing as well as a preparation method and application thereof. The thickening agent comprises the following components: (a) 1-vinyl-2-pyrrolidone; (b) a di [2-(methacryloyloxy) ethyl] phosphate ester; (c) 2-(perfluorohexyl) ethyl methacrylate; (d) 4, 4 '-diaminostilbene-2, 2'-disulfonic acid; (e) an initiator; based on 1 mole part of 1-vinyl-2-pyrrolidone, the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part respectively, and the dosages of the di [2-(methacryloyloxy) ethyl] phosphate ester, the 2-(perfluorohexyl) ethyl methacrylate and the 4, 4 '-diaminostilbene-2, 2'-disulfonic acid are respectively 0.05 to 0.1 mole part, 0.1 to 1 mole part and 0.2 to 0.5 mole part. The thickening agent has the advantages of high apparent viscosity, high shear resistance, temperature resistance and high resistance reduction rate, and the resistance reduction rate reaches 70% or above.

The application provides a FeCuNiTiAl-based high-entropy alloy composite coating and a preparation method and application thereof, and belongs to the technical field of coatings.The preparation method of the FeCuNiTiAl-based high-entropy alloy composite coating provided by the application comprises the following steps: mixing FeCuNiTiAl high-entropy alloy powder and tungsten carbide powder to obtain cladding powder; the mass content of the tungsten carbide powder in the cladding powder is 5-15%; the cladding powder is laid on the surface of a base material to form a cladding powder layer, and then laser cladding treatment is performed to form a FeCuNiTiAl-based high-entropy alloy composite coating on the surface of the base material.The FeCuNiTiAl high-entropy alloy powder and the tungsten carbide powder are mixed and then subjected to laser cladding treatment, so that the corrosion resistance of the FeCuNiTiAl high-entropy alloy coating can be effectively improved.

The invention relates to the technical field of ceramics, and discloses a method for producing a ceramic product with an anti-counterfeiting function by using a high-temperature-resistant upconversion material, the high-temperature-resistant upconversion material is added into an underglaze color material, and the addition amount is 3-5wt% of the total weight of the underglaze color material; drawing a pattern on a ceramic body by adopting the underglaze color material; applying transparent glaze; sintering at the temperature of 1100 to 1320 DEG C; or coating the slurry A on the surface of the ceramic body; locally covering the slurry B; sintering at the temperature of 690 to 820 DEG C; the slurry A comprises lead-free glass powder and a blender; the slurry B comprises a decorative pigment, a blender and a high-temperature-resistant upconversion material; the addition amount of the high-temperature-resistant upconversion material is 1-5wt% of the total weight of the slurry B; wherein the high-temperature-resistant up-conversion material is YSZ: x mol% of Er < 3 + > and y mol% of Yb < 3 + >; 0 < x < = 6, and 0 < y < = 20. The high-temperature-resistant up-conversion material disclosed by the invention still has efficient luminescence performance after being subjected to secondary high-temperature sintering, and has a wide application prospect in the technical field of ceramic tracing and authentic identification.

The utility model provides a multistage filter screen for industrial wastewater, which belongs to the technical field of industrial wastewater filtration and comprises a fixing frame, and the fixing frame is provided with a plurality of transverse mounting ports used for fixing a primary filter screen, an intermediate filter screen, an advanced filter screen and an activated carbon filter part; wherein the apertures of the primary filter screen, the intermediate filter screen and the high-grade filter screen are sequentially reduced, and the primary filter screen, the intermediate filter screen and the high-grade filter screen are used for performing multi-stage filtration on industrial wastewater; the activated carbon filter part is arranged on one side, far away from the primary filter screen, of the advanced filter screen, and a neutralization liquid input pipe is fixed in the activated carbon filter part and is used for neutralizing the filtered industrial wastewater; the utility model provides a multistage filter screen for industrial wastewater, which can solve the problems that fine particles and dissolvable harmful substances cannot be effectively removed by the traditional physical filtration, and the acid-base property of the wastewater can influence the subsequent treatment or the environment.

The invention discloses a multi-angle color-changing cold stamping foil and a preparation process thereof, and relates to the technical field of package printing and anti-counterfeiting. The cold stamping foil comprises a base film layer, a separation layer, a first aluminum plating layer, a dielectric layer, a second aluminum plating layer and an adhesive layer which are sequentially stacked, the thickness of the dielectric layer is 100-500 nm, and the second aluminum plating layer is a semitransparent layer with the thickness of 5-20 nm. The preparation process comprises the following steps: preparing the cold stamping foil, coating an adhesive on a printing stock, pressing and transferring, and stripping a base film. According to the invention, the Fabry-Perot interference structure is formed by controlling the thicknesses of the two aluminized layers and the middle dielectric layer, so that the final hot stamping pattern presents a smooth and bright dynamic color changing effect at different observation angles. The technology is compatible with standard cold stamping equipment, the cost is low, the efficiency is high, and the manufactured product has the excellent visual effect and the high anti-fake performance and is suitable for the fields of high-end packaging, anti-fake certificates and the like.

The invention discloses a hydrogen energy and natural energy heat pump heat supply and refrigeration integrated system and method, and relates to the technical field of hydrogen energy and natural energy heat pump heat supply and refrigeration integration. The heat pump heating module comprises the following steps that S1, carbon dioxide in air is absorbed through a refrigerant or the refrigerant and released into water; the carbon dioxide heat pump is used, and carbon dioxide is a clean refrigerant, has no destructive influence on the environment, is stable in chemical property, non-combustible, not easy to decompose at high temperature, does not generate harmful gas, is non-toxic, reduces threats to people due to leakage, is good in fluidity and has a relatively high evaporation latent heat value; compared with conventional refrigerants, the compression ratio of carbon dioxide is much smaller than that of common refrigerants, high performance coefficient and mechanical efficiency can be achieved, the high condensing temperature enables the exhaust temperature of a compressor to be high, and water at the high temperature can be obtained.