415 results about "Boric acid" patented technology

A process or method for manufacturing a fire-retardant treated wood composite board or panel, such as oriented-strand board, with a low melting point fire retardant (FR) material, such as boric acid, while the press is operating at typical press temperatures above the FR material melting point. An intervening overlay is applied to the top surface of the mat on the forming line, after the use or application of any FR material within or on the mat, prior to entry into the press. The intervening overlay covers the top surface so as to prevent the melting fire retardant material from contacting the press platen(s). After pressing, the intervening overlay may be removed from the top surface by sanding, buffing, or other methods. The intervening overlay also may be sized so as to extend over one or more edges of the underlying panel, for ease of removal post-process.

A boron-containing polyethylene glycol fatty acid ester surfactant belongs to the field of organic chemistry and functional materials. The boron-containing polyethylene glycol fatty acid ester surfactant is prepared as follows: polyethylene glycol (PEG), boric acid and fatty acid are used as raw materials, first esterification reaction of the PEG and the boric acid is performed, then esterification reaction of the PEG and the fatty acid is performed to obtain boron-containing poly ethylene glycol fatty acid ester; by changing the species of fatty acids and catalysts and molecular weight of the PEG, the esterification rate can be enhanced, the boron-containing poly ethylene glycol fatty acid ester product can be used as a surfactant, and the boron-containing poly ethylene glycol fatty acid ester can reduce water surface tension and has good emulsifying properties.

The invention discloses a preparation method and application of a nickel-cobalt oxide modified molybdenum-doped bismuth vanadate composite photo-anode, and belongs to the application field of hydrogen production through water decomposition in photoelectrochemical reaction engineering. The preparation method comprises the following steps: obtaining a Mo-BiVO4 photo-anode through an electro-deposition and calcination combined method, preparing a precursor solution containing bimetallic nickel and cobalt by using cobalt nitrate hexahydrate, nickel nitrate hexahydrate and boric acid, immersing the Mo-BiVO4 photo-anode into the precursor solution, and growing a nickel-cobalt oxide (NiCoOx) cocatalyst on the surface of Mo-BiVO4 by using a photo-assisted electro-deposition method, thereby obtaining the Mo-BiVO4 photocatalyst. According to the NiCoOx cocatalyst modified Mo-BiVO4 composite photoanode and the preparation method thereof, the photocurrent density of the optimal NiCoOx cocatalyst modified Mo-BiVO4 composite photoanode obtained by the preparation method disclosed by the invention is 5.2 times that of pure bismuth vanadate. The preparation method has the advantages of simple operation method, easily available raw materials, low economic cost and good stability.

The invention discloses low-melting-point antibacterial alkali-free glass and a preparation method thereof, and relates to the technical field of glass. According to the technical scheme, the anti-bacterial coating is prepared from, by mass, 60%-75% of silicon dioxide, 3%-13% of aluminum oxide, 3%-6% of boric acid, 1.5%-5% of magnesium oxide, 0.7%-7.5% of carbonate, 0.5%-3% of nitrate, 0.01%-0.5% of tin oxide, 0.1%-5% of titanium trifluoride and 0-1% of anti-bacterial enhancer. According to the invention, the problems of high melting point and large energy consumption of traditional TFT substrate glass raw materials are solved, the requirements of the market on the antibacterial property of the TFT substrate glass are met, and an innovative technical solution is provided for the electronic glass manufacturing industry.

The invention provides a biaxially oriented nylon light conversion film as well as a preparation method and application thereof. A nylon / flaky nano silicon dioxide blend is used as a supporting layer, a nylon / boric acid functionalized terbium metal organic framework material blend is used as a variable light conversion characteristic layer, and the two-way stretching nylon light conversion film is obtained through synchronous two-way stretching. The film has dripping and variable light conversion characteristics, and can convert ultraviolet light into red orange light or blue light.

The invention provides a thermal response self-ceramization fireproof coating and a preparation method thereof. The thermal response self-ceramization fireproof coating is prepared from the following raw materials in parts by mass: 3 to 10 parts of acrylic monomer, 3 to 10 parts of organic sulfonate, 1 to 4 parts of silane coupling agent, 0.5 to 3 parts of silicate ester, 4 to 6 parts of ceramic precursor, 3 to 6 parts of fluxing agent and 0.05 to 0.4 part of initiator. The fluxing agent comprises a component A and a component B, the component A is one of boric oxide, zinc borate or low-melting-point glass powder, and the component B is one of phosphorus pentoxide and ammonium polyphosphate. The silane coupling agent can be copolymerized with an acrylic monomer to construct a C-C main chain, the C-C main chain and silicate ester are subjected to hydrolytic condensation to form a Si-O-Si three-dimensional network, a chemical cross-linked skeleton is formed, and the chemical cross-linked skeleton can generate silicon dioxide at high temperature to participate in a ceramization reaction; the ceramic precursor and silicate ester can form a strong physical cross-linking effect, so that the fireproof coating with a chemical and physical double-cross-linked network can be formed, and the fireproof coating has excellent mechanical property and machinability at normal temperature.

The invention discloses a long-life phosphorescent sulfur quantum dot, a multicolor long-life phosphorescent sulfur quantum dot composition and a preparation method and application thereof, and belongs to the technical field of phosphorescent materials and information encryption. The preparation method comprises the following steps: carrying out solvothermal reaction on a sulfur source and ethylenediamine to obtain sulfur quantum dots, and adding a sulfur quantum dot aqueous solution into a boric acid matrix to react to prepare long-life phosphorescent sulfur quantum dots (SQDs-MA); the long-life phosphorescent sulfur quantum dots and a rhodamine B aqueous solution are blended and dried to prepare the multicolor long-life phosphorescent sulfur quantum dot composition (RhB / SQDs-MA). When excited by ultraviolet light, the SQDs-MA shows a wide absorption range of 200 to 700 nm. When excitation is carried out at 362 nm, the SQDs-MA shows a blue fluorescence emission peak at 436 nm. The SQDs-MA powder emits bright green phosphorescence after the irradiation of an ultraviolet lamp is turned off, and under the optimal excitation of 373 nm, the maximum phosphorescence emission value is displayed at 526 nm. Under the irradiation of ultraviolet light, the RhB / SQDs-MA can emit yellow, orange and red phosphorescence at the wavelength of 584 nm, 600 nm and 620 nm.

The invention discloses an ytterbium ion doped samarium calcium oxide borate nonlinear optical crystal and a preparation method and application thereof.The crystal belongs to a monoclinic system, an m point group and a Cm space group, the chemical formula is YbxSm1-xCa4O (BO3) 3, the chemical formula is 0.1-0.99, the cell parameters are as follows: a = 8.064-8.110, b = 16.045-16.062, c = 3.570-3.600, alpha = gamma = 90 degrees and beta = 100.80-101.38 degrees, and the ytterbium ion doped samarium calcium oxide borate nonlinear optical crystal has good crystal quality and transmittance as high as 87% and can be applied to high-power laser devices, such as laser devices, laser devices, laser devices and the like. The method is widely applied to the fields of photoetching machines, laser medical treatment, laser cutting and the like, and the preparation method has the advantages of being low in cost, high in quality, stable in performance, suitable for large-scale production and the like.

The invention discloses an environment-friendly high-toughness flame-retardant ABS (Acrylonitrile Butadiene Styrene) composition as well as a preparation method and application thereof. The environment-friendly high-toughness flame-retardant ABS composition is mainly prepared from the following raw materials in parts by weight: 2 to 3 parts of antimony trioxide, 3 to 6 parts of bromotriazine, 1 to 3 parts of hexabromocyclododecane, 1 to 2 parts of HP-AHB type flame retardant, 80 to 85 parts of ABS resin composition, 0.1 to 0.5 part of anti-dripping agent, 1 to 3 parts of zinc borate and 5 to 10 parts of nano calcium carbonate. The environment-friendly high-toughness flame-retardant ABS composition has the characteristics of high toughness, good flame-retardant effect and the like, and the composite material has the advantages, can be applied to the field of new energy automobiles, and has the advantages of low cost, high economic benefit and comprehensive popularization value.

The invention discloses a wood-based composite phase-change material and a preparation method thereof, and belongs to the technical field of phase-change materials.The preparation method of the wood-based composite phase-change material comprises the following steps that wood is cut and then added into delignification liquid to be heated, the wood is taken out and washed with water, and delignified wood is obtained; the delignification wood is added into the modification liquid to be heated, and after being taken out, the delignification wood is washed and dried to obtain pretreated wood; mixing polyethylene glycol, citric acid and boric acid, heating and stirring to obtain a phase change material; dipping the pretreated wood into the phase change material for vacuum dipping, taking out and drying to obtain the phase change material. The modified liquid is prepared from an ethanol water solution, a modified filler, 2-(3, 4-cyclohexene oxide) ethyltrimethoxysilane and triethylamine. The delignification liquid and the modification liquid are adopted for pretreating the wood, so that the wood can be better firmly combined with the phase change material, leakage is prevented, and the finally prepared wood-based composite phase change material has excellent heat management capacity and stability.

The invention relates to a method for separating and purifying waste boric acid liquid in formed foil waste liquid and concentrating boric acid, which comprises the following steps: adding ammonia water into the boric acid waste liquid to promote the waste liquid to separate out aluminum hydroxide precipitate, and separating the aluminum hydroxide precipitate from the waste liquid to obtain primary separated liquid; carrying out ultrafiltration on the primary separated liquid, adding boric acid or citric acid, and promoting ammonium pentaborate in the primary separated liquid to be hydrolyzed into boric acid, so as to obtain acidizing fluid; freezing and crystallizing the acidizing fluid until solid boric acid is separated out; and carrying out solid-liquid separation on the precipitated boric acid solid mixed solution, and carrying out vacuum drying or normal-pressure drying on the boric acid solid for recycling. According to the treatment method and system, aluminum and ammonium radicals can be efficiently separated from the aging waste liquid, ammonium pentaborate is converted into boric acid to be efficiently recycled, the environment can be better protected, the purity of the recycled boric acid product and recycling of the recycled boric acid product in the formed foil industry are guaranteed, and the operation cost of an enterprise is reduced.

The invention relates to the technical field of lead frame coarsening, in particular to a nickel coarsening process of a lead frame. A nickel coarsening process of a lead frame comprises the following procedures of oil removal, acid pickling, nickel electroplating coarsening and acid pickling, the nickel electroplating coarsening refers to that an electroplating coarse nickel layer is obtained in an electroplating bath loaded with nickel electroplating coarsening liquid in an electroplating mode, and the nickel electroplating coarsening liquid comprises 90-130 g / L of nickel aminosulfonate, 40-50 g / L of boric acid and 0.1-0.3 g / L of an additive. According to the nickel roughening process of the lead frame, the rough nickel layer can be directly obtained, and the copper substrate does not need to be treated, namely additional electroplating pretreatment is not needed. According to the nickel coarsening process, crystallization of nickel ions on the surface of the lead frame is remarkably affected in the nickel electroplating deposition process through the additive in the nickel electroplating coarsening liquid, the limiting current density of the nickel electroplating coarsening liquid is reduced, deposition of a high-current-density area is restrained, nearly-spherical round grains are formed, and the nickel electroplating quality is improved. Meanwhile, the process of electron deposition of nickel ions is accelerated, cathodic polarization is reduced, growth of nickel crystal nucleuses is promoted instead of nucleation, large-size particles are formed, the surface roughness is improved, an electroplating coarse nickel layer with certain roughness is finally formed, the content of nickel metal in an electroplating nickel coarsening solution cannot be continuously increased, wastewater discharge is reduced, and the production cost is reduced. The environment is protected.

To provide an anti-mite sheet that can maintain a high anti-mite effect for a long term.SOLUTION: An anti-mite sheet (1) relating to the present invention is provided with a pair of air-permeable sheets (5, 7) and a B type silica gel (9) which is enclosed in a storage part (3a) defined by the pair of air-permeable sheets (5, 7). The air-permeable sheets (5, 7) include: an air-permeable layer (11) which is composed of an air-permeable material and aerates between the storage part and the outside; and an anti-mite coating layer (17) which is installed on the outer face of the air-permeable layer (11) and which contains boric acid-based glass powder (15) that discharges B2O3. At least one of the pair of air-permeable sheets is characterized by having a humid control layer (23) between the air-permeable layer (11) and the anti-mite coating layer (17).SELECTED DRAWING: Figure 2

The invention discloses a conveying system and a diffusion furnace, and belongs to the technical field of semiconductor processing. In the conveying system, an air inlet assembly extends in the axial direction of a process chamber of the diffusion furnace and communicates with the process chamber. In the air inlet assembly, the first air inlet pipe is sleeved with the second air inlet pipe, and a conveying gap is formed between the second air inlet pipe and the first air inlet pipe. The gas outlet end of the first gas inlet pipe and the gas outlet end of the second gas inlet pipe are close to a furnace door of the diffusion furnace; one end of the first input pipeline is communicated with a process gas source, and the other end is communicated with the gas inlet end of the first gas inlet pipe; one end of the second input pipeline is communicated with the water source, and the other end of the second input pipeline is connected to the air inlet end of the second air inlet pipe. According to the conveying system, the problems that in the working process of an existing diffusion furnace, the air inlet pipeline is extremely prone to being blocked by boric acid, so that the air inlet pipeline needs to be frequently cleaned, the process efficiency is seriously affected, and the manpower and spare part cost is increased can be solved.

The invention relates to a method for preparing high-purity bismuth by removing impurity lead in refined bismuth through oxidation slagging, and belongs to the technical field of non-ferrous metals. Melting and oxidizing: melting a lead-containing refined bismuth raw material at 300-400 DEG C, adding bismuth oxide into the molten bismuth, and fully stirring to enable the bismuth oxide and lead to generate oxidation reaction to generate lead oxide; slagging reaction: adding boric anhydride (B2O3) into the melt, and enabling the boric anhydride (B2O3) to react with the generated lead oxide to generate lead borate slag; slag salvaging and lead removal: stirring for 30-60 minutes at the temperature of 300-400 DEG C in a heat preservation manner, so that the slagging reaction is fully carried out, generated lead borate slag with lower density floats to the surface of a melt, and a lead-containing slag phase is removed in a mechanical or manual slag salvaging manner; and after the slag salvaging process is finished, cooling the bismuth melt under a protective atmosphere until the bismuth melt is solidified to obtain a lead-removed high-purity bismuth product. According to the method, bismuth oxide and boric anhydride are introduced, metal lead is converted into lead borate slag easy to float, efficient and deep separation of lead and bismuth melt is achieved through the density difference, and the lead content can be reduced to 1 ppm or below.

The invention discloses a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine. The method comprises an acetic acid solution, a hydrochloric acid solution, a triethanolamine solution, a potassium hydroxide solution and boric acid. The method for measuring the content of calcium fluoride in the dolomite-containing fluorite mine comprises the following steps: S1, reagent proportioning; s2, preparing a calcium standard solution; s3, preparing an EDTA standard titration solution; s4, selecting an instrument; s5, preparing a sample; s6, step analysis; s7, content correction and determination; and S8, calculating a result. The invention belongs to the technical field of calcium fluoride content determination, and particularly relates to a method for measuring the content of calcium fluoride in dolomite-containing fluorite mine, compared with the prior art, the method solves the problem of dolomite dissolution when calcium carbonate is leached by acetic acid, and the content of calcium fluoride in the fluorite mine can be measured by accurately calculating the dissolution amount of dolomite. The measured calcium fluoride content is clearer, more reasonable and more reliable and approaches to a true value, and the process operation is simple and rapid, and is suitable for the requirements in the fields of mine production, assay detection and the like.

The invention discloses a perovskite composition as well as a preparation method and application thereof. The perovskite composition is prepared from the following raw materials: (FA < 0.95 > MA < 0.05 >) < 0.95 > Cs < 0.05 > Pb < (I < 0.95 > Br < 0.05 >) < 3 > and an additive, the additive is prepared from at least one of 1-octyl-3-methylimidazolium tetrafluoroborate, 1-butyl-1-methylpiperidine tetrafluoroborate and 1-butyl-4-methylpyridine tetrafluoroborate, and the additive is prepared from at least one of 1-octyl-3-methylimidazolium tetrafluoroborate, 1-butyl-1-methylpiperidine tetrafluoroborate and 1-butyl-4- The perovskite composition provided by the invention can effectively improve the light absorption performance, the carrier transport performance and the interface contact quality of a perovskite thin film, so that the photoelectric conversion efficiency of a perovskite solar cell is improved.

The invention discloses a loss-resistant mildew-proof flame retardant for wood and bamboo wood and a preparation method and application of the loss-resistant mildew-proof flame retardant for the wood and bamboo wood, and the loss-resistant mildew-proof flame retardant for the wood and bamboo wood has the advantages that through the synergistic effect of a surfactant and low-molecular resin (polyethylene glycol diglycidyl ether); the compatibility problem between an organic antiseptic and mildew-proof agent (isothiazolinone organic mildew-proof agent) and an inorganic flame retardant (boric acid and ammonium polyphosphate) is successfully solved, the mildew-proof and flame-retardant properties of wood can be effectively improved, polyethylene glycol diglycidyl ether reacts with cell walls of wood and bamboos under the action of an initiator, so that the compatibility between the organic antiseptic and mildew-proof agent (isothiazolinone organic mildew-proof agent) and the inorganic flame retardant (boric acid and ammonium polyphosphate) is improved. The excellent leach resistance is endowed.

A particulate nanocomposite material comprising, as determined by X-ray diffraction (XRD): elemental carbon (C); elemental nickel (Ni) in a cubic crystalline phase; a cubic nickel oxide (NiO) crystalline phase; an orthorhombic calcium borate (CaB2O4) crystalline phase; and, a magnesium borate (MgB2O4) crystalline phase. The porous particulate nanocomposite is characterized in that, based on the total number of atoms in the particulate nanocomposite material: the atomic concentration of carbon is from about 1 atomic percent (at. %) to about 10 at. %; the atomic concentration of nickel is from about 1 at. % to about 10 at. %; the atomic concentration of boron (B) is from about 1 at. % to about 10 at. %; the atomic concentration of magnesium (Mg) is from about 5 at. % to about 15 at. %; and, the atomic concentration of calcium (Ca) is from about 1 at. % to about 10 at. %.

The invention discloses a hydrophilic self-cleaning glaze which comprises the following components in percentage by mass: 75-95% of hydrophilic frit and 5-25% of kaolin, the hydrophilic frit comprises the following components in percentage by mass: 2-4% of boric acid, 5-9% of lithium carbonate, 30-40% of wollastonite, 9-16% of calcined talc, 10-20% of kaolin, 13-22% of quartz and 8-12% of aluminum oxide. According to the hydrophilic self-cleaning glaze provided by the invention, on the premise of reducing the production cost, excellent and lasting self-cleaning performance can be realized, and the technical problem of poor timeliness of self-cleaning performance in the prior art is solved.

The invention discloses a preparation method of an efficient anti-reflection film for photovoltaic glass. The preparation method comprises the following steps: cleaning and pretreating the photovoltaic glass; then preparing a composite sol by taking tetraethyl silicate, boric acid, hydrochloric acid, F127, absolute ethyl alcohol and deionized water as raw materials through a sol-gel method, aging the composite sol, and then adding tetraethyl silicate and methyltriethoxysilane for modification to prepare an anti-reflection coating solution; and then carrying out pulling and high-temperature toughening treatment to prepare the anti-reflection film on the surface of the photovoltaic glass. The thin film takes SiO2 as a main component and is formed by disorderly stacking two kinds of SiO2 particles with different sizes, the thin film has high transmittance in a visible light band and low transmittance in a near-infrared band due to a special pore structure, so that the purposes of low temperature rise of the photovoltaic module and high-efficiency work of the photovoltaic module are achieved, and meanwhile, the method is low in cost, simple and convenient in process and suitable for industrial production. The industrial popularization is facilitated.

The invention relates to the technical field of power cables, and provides a flame-retardant power cable and a preparation method thereof. The flame-retardant power cable comprises a conductor, an insulating layer and a sheath layer which are sequentially arranged from inside to outside, and the sheath layer is prepared from, by weight, 40-60 parts of polyethylene, 60-80 parts of ethylene-vinyl acetate copolymer, 8-10 parts of compatilizer, 3-5 parts of auxiliaries, 15-20 parts of filler and 60-70 parts of flame retardant. The flame retardant is prepared from magnesium hydroxide, antimony trioxide, hydrated zinc borate and an aromatic bromine-containing compound in a mass ratio of 45: 8: 12: (25-30), and the number of bromine atoms of the aromatic bromine-containing compound is 6-8. According to the technical scheme, the problem of insufficient flame retardant property of the power cable in the prior art is solved.

The invention belongs to the technical field of filling materials, and provides a high-dosage red mud-based filling material as well as a preparation method and application thereof. The high-dosage red mud-based filling material comprises the following components in parts by mass: 100 parts of red mud, 6-14 parts of fly ash, 8-16 parts of cement, 3-5 parts of a composite acid activator and 60-95 parts of water, the composite acid activator is a boric acid and citric acid compounded activator or a boric acid and calcium chloride compounded activator. The high-doping-amount red mud-based filling material can be rapidly solidified in a high-sulfate goaf, has high strength, meets the filling requirement of the high-sulfate goaf, also has good fluidity and environmental friendliness, and has a good filling effect when being applied to filling of the high-sulfate goaf. Strong-acid sewage in the high-sulfate goaf can be effectively blocked, and the method has a good ecological environment restoration effect and remarkable economic benefits.

The invention discloses a preparation method of a large-particle single crystal alpha-alumina material. The preparation method comprises the following specific operation steps: step 1, grinding and mixing boric acid or aluminum fluoride with industrial alumina according to a certain mass ratio to obtain M1; step 2, carrying out pressure molding on the M1 to obtain M2; 3, the M2 is calcined, the calcination temperature is 1200-1600 DEG C, and the calcination time is 4-10 h; and step 4, carrying out crushing treatment on the calcined sample, and carrying out ball milling to obtain the large-particle single crystal alpha-aluminum oxide. The average particle size of the alpha-aluminum oxide prepared by the method is 40-100 microns, and the alpha-aluminum oxide is short in preparation time, simple in process, convenient to operate, low in cost and suitable for large-scale production.

The invention discloses a ceramic fire-resistant sealant for a bridge, a fireproof structure, a preparation device and a preparation method, and relates to the technical field of sealants for the bridge. The ceramic fire-resistant sealant for the bridge comprises the following specific components in parts by weight: 100 parts of an MS polymer; 0 to 100 parts of a plasticizer; 80 to 150 parts of aluminum hydroxide; 80 to 150 parts of modified wollastonite; 50 to 100 parts of calcium carbonate; 10 to 20 parts of zinc borate; 10 to 20 parts of melamine polyphosphate; 5 to 10 parts of dipentaerythritol; 5 to 10 parts of a dewatering agent; 5 to 10 parts of an adhesion promoter; and 0.5-2 parts of a catalyst. According to the ceramic fire-resistant sealant for the bridge, a rubber body formed after vulcanization is converted into a self-supporting ceramic body under the condition of high temperature or open fire, flame is prevented from diffusing into a material, so that the purposes of flame retardance and fire prevention are achieved, meanwhile, the mechanical property is not obviously attenuated before and after thermal aging, and good elasticity is still kept; and the vulcanized paint has excellent adhesive force to the paint, so that the use effect of the paint is guaranteed.

The invention relates to a method for preparing a sample wafer for X fluorescence analysis of bentonite by using a melting method, which comprises the following steps: 1) adding a flux and a bentonite sample into a crucible, dropwise adding a boric acid-glycerol solution, and stirring until the mixture is muddy; (2) adding a liquid oxidant into the crucible, uniformly stirring, wiping the head of the glass rod with quantitative filter paper, and putting the wiped filter paper into the crucible; and 3) firing the crucible on a high-frequency sample melting machine until the solid in the crucible is molten into a liquid state, adding a release agent, slightly cooling, and demolding to obtain the sample for X fluorescence analysis. The method has the advantages that the operation is simple, the flaking rate is high, and prerequisite conditions are provided for quickly, accurately and reliably measuring the primary and secondary components of the bentonite. According to the method, the sample does not need to be fired at high temperature by a muffle furnace in advance, the platinum crucible does not need to be pretreated, the detection period is remarkably shortened, and the power consumption cost is reduced.

Methods for the production of rare earth magnetic materials including magnetic crystals of Nd2F14B and the magnetic materials produced thereby. The methods lead to the formation of magnetic materials having a high concentration of Nd2F14B crystals. The method comprises steps of: admixing a neodymium borate powder, iron powder and calcium hydride to form a precursor powder; compacting the precursor powder to form a compacted precursor powder body; and heating the compacted precursor powder body to form a consolidated powder body.

The invention provides green room temperature phosphorescence (RTP) carbon dots (CDs) and a preparation method thereof in the technical field of luminescent carbon materials, and solves the problems of complex preparation process, high cost and high toxicity of a traditional phosphorescent material, economical arginine, phosphoric acid and boric acid are used to prepare an RTP CDs material through a simple one-step hydrothermal method, and the RTP CDs material can be used for preparing the luminescent material under ultraviolet light. The CDs show blue fluorescence, after the ultraviolet light is removed, the macroscopic afterglow of the phosphorescent CDs is green and still lasts for about 12 seconds, and the CDs are endowed with excellent optical performance due to the compact cross-linked structure and the multi-atom co-doping effect.

The application discloses a kind of determination methods and program products of core reactivity state, the method includes: the key state parameter in the process of core reaction is collected, key state parameter includes at least one of core power distribution parameter, coolant temperature, coolant density, control rod position, boric acid concentration and burnup;Determine the burnup step of fuel, the evolution process of fissile nuclide and fission product in core is modeled based on the burnup step of fuel and burnup model, to obtain the reactivity parameter related to the burnup of fuel, the burnup model is used to describe the nuclide transmutation and consumption logic of fuel during the operation of core;Corresponding digital twin is constructed with the reactivity state of the core, the reactivity state of the core is mapped by the digital twin based on the reactivity parameter and the key state parameter driving, can realize high-precision, real-time, full life cycle dynamic digital mapping and intelligent detection of core reactivity state.

Provided herein are compositions and methods to improve plant resistance to abiotic and biotic stress, thereby improving crop yield. Provided herein are compositions including zinc, copper, and an acid, where the acid is selected from citric acid, sulfuric acid, oxalic acid, humic acid, fulvic acid, boric acid, acetic acid, and a combination thereof. Certain embodiments optionally include ammonium sulfate. Compositions described herein have plant priming activity where the plant's defenses against abiotic and biotic stress are boosted.