335 results about "Impurity ions" patented technology

The invention relates to a super junction power device and a preparation method thereof. The preparation method comprises the following steps: providing a silicon carbide substrate; a silicon carbide epitaxial layer is formed on the top surface of the silicon carbide substrate, the silicon carbide epitaxial layer has first type impurity ions, a plurality of doped columns are formed in the silicon carbide epitaxial layer, the doped columns have second type impurity ions, and the doped columns are formed through an etching process and an epitaxial process or through a multi-step epitaxial process and a multi-step ion implantation process; forming a body region in the surface, far away from the silicon carbide substrate, of the silicon carbide epitaxial layer, wherein the body region has second type impurity ions; forming a source region between the doped columns, wherein the source region is provided with a first type of foreign ions; forming a first groove penetrating through the source region and the body region between the adjacent doped columns, and forming a second groove penetrating through the body region above the doped columns; forming a gate structure in the first groove; and forming a source trench structure in the second trench. The on resistance of the super junction power device is reduced, and the voltage withstanding characteristic of the super junction power device is improved.

The invention relates to the technical field of aluminum ash washing filtrate recycling intelligent control, in particular to an aluminum ash washing filtrate recycling intelligent control device and method, and the device comprises a multi-parameter online detection module, a data processing optimization module, a process parameter execution module and a filtrate circulation module. The multi-parameter online detection module is used for cooperatively detecting the real-time concentration of trace impurity ions such as fluorine, potassium and sodium through an ion selective electrode array and a micro spectrum analyzer; predicting the dissolution trend of impurity ions through an LSTM model and generating a process parameter adjustment instruction; the process parameter execution module regulates and controls the stirring strength, the liquid-solid ratio and the water-ash contact time in a linkage manner; and the filtrate circulating module is used for buffering, homogenizing and proportionally mixing the washed liquid phase to generate a regenerated leaching medium for recycling. According to the method, the detection data and the model decision are dynamically matched through the closed-loop control process, and the impurity element removal efficiency is improved.

The invention provides a method for synergistically recovering all elements of crystal silicon cells of a decommissioned photovoltaic module, which comprises the following steps of: collecting large-particle waste crystal silicon cells and grinding the large-particle waste crystal silicon cells to obtain powder; the powder is leached with nitric acid, and leach liquor and impurity-removed silicon powder are obtained; leaching the silicon powder subjected to impurity removal by using an HF solution to remove a silicon nitride layer, and filtering, washing and drying to obtain the silicon powder meeting the industrial standard; the leaching solution is subjected to chlorination precipitation to obtain silver chloride and a leaching solution with silver removed, and after the silver chloride is filtered, the silver chloride is subjected to acid pickling and water washing to obtain silver chloride; sodium sulfide is added into the leaching solution after silver removal, metal in the leaching solution is precipitated, and a solution containing Al < 3 + > can be obtained after filtering; the method comprises the following steps: adding an alkaline substance into a solution containing Al < 3 + >, filtering to obtain an aluminum hydroxide precipitate, and washing the aluminum hydroxide precipitate to remove foreign ions adsorbed on the surface; one technical effect of the invention is that collaborative recovery and treatment of each element in the waste crystal silicon battery piece are realized.

The invention relates to a high-adaptability fused salt heat storage system in-situ monitoring method, which is characterized in that current and potential signals correspond to the concentration of impurity ions in fused salt through an electrochemical analysis method, and the current value of a characteristic peak corresponds to the concentration of impurities in the fused salt, so that sampling and chemical analysis are not needed; according to the method, the real-time concentration of the impurities can be obtained only by acquiring the characteristic peak current value through electrochemical scanning, the fused salt component analysis process is greatly simplified, the real-time monitoring of the ion concentration through the square wave voltammetry is an automatic and continuous process, and compared with a traditional analysis method, the method has the advantages of being high in sensitivity and analysis speed and suitable for popularization and application. And analyzable response can be generated to tiny concentration change. According to the invention, in-situ and continuous measurement of the concentration of the marker impurities in the molten salt can be realized, and timely and accurate feedback can be provided for changes of components and heat storage performance of the molten salt.

The invention provides an alkali metal group ion selective permeable membrane, a preparation method and a lithium, rubidium and cesium extraction method and system, and the membrane is prepared by taking polyphenylene sulfide, Zr (HPO4) 2 and a high-molecular polymer adhesive as raw materials through mixing, fibration treatment and compression molding processes. Based on the weak dipole adsorption characteristic between the sulfur position of high-crystallization polyphenylene sulfide and alkali metal cations, efficient screening of monovalent alkali metal ions (Li < + >, Rb < + > and Cs < + >) and multivalent impurity ions (Mg < 2 + >, Al < 3 + > and Fe < 2 + >) is achieved, and the method can be used for extracting rubidium and cesium. The ion selective permeable membrane has excellent mechanical properties, high separation efficiency and corrosion resistance, and is low in production cost; and finally, the multiple targets of lepidolite leaching liquid impurity removal and lithium rubidium cesium synergistic extraction are achieved.

The invention discloses an aqueous zinc ion battery diaphragm as well as a preparation method and application thereof. The battery diaphragm comprises a base material and a Nus-6 layer arranged on the surface of the base material. According to the invention, the Nus-6 layer is used for carrying out coating modification on the diaphragm, and the modified diaphragm can selectively allow zinc ions to pass through and block some impurity ions or solvent molecules which may cause side reactions, so that the occurrence of the side reactions is reduced. The porous structure of the Nus-6 layer can provide an additional channel for ion transmission. Meanwhile, Nus-6 is relatively stable at high temperature and in a water system environment, and can be applied to a water system zinc ion battery.

The invention provides a manufacturing method of a semiconductor structure, which comprises the following steps of: growing a first semiconductor layer on a substrate, etching a groove in one side, far away from the substrate, of the first semiconductor layer, partially penetrating through the first semiconductor layer, growing a sacrificial layer on the first semiconductor layer, etching the sacrificial layer, and repeating the growth and the etching of the sacrificial layer for multiple times, and carrying out secondary epitaxy on a third semiconductor layer in the groove until the ion concentration of the surface of the first semiconductor layer exposed by the groove is lower than a preset value. Through the method of etching the sacrificial layer after growing the sacrificial layer for multiple times, on one hand, the ion concentration of the first conduction type on the surface of the first semiconductor layer exposed by the groove can be reduced, so that the third semiconductor layer of the second conduction type can be grown in the groove, and the lattice quality of the third semiconductor layer is improved; on the other hand, the impurity ion concentration in the growth cavity of the third semiconductor layer can be reduced, the quality of the third semiconductor layer is further improved, and the reliability of the semiconductor structure is improved.

The invention relates to a resin life prediction method and device, a storage medium and electronic equipment, and relates to the field of nuclear technology, and the method comprises the steps: firstly obtaining the exchange capability data of resin in a purification system and the purification flow of the purification system; measuring the inlet conductivity of the coolant flowing into the resin on line by using a first conductivity measuring instrument, wherein the first conductivity measuring instrument is arranged at the inlet of the coolant flowing into the resin; measuring the outlet conductivity of the coolant outflow resin on line by using a second conductivity measuring instrument, wherein the second conductivity measuring instrument is arranged at the outlet of the coolant outflow resin column; based on the inlet conductivity and the outlet conductivity, the equivalent concentration of impurity ions in the coolant is determined; and finally, predicting the service life of the resin according to the equivalent concentration of the impurity ions, the exchange capacity data of the resin and the purification flow of the purification system. Through the scheme disclosed by the invention, online prediction of the service life of the resin can be realized, and the time hysteresis of prediction of the service life of the resin is effectively reduced.

The invention provides spherical cobaltosic oxide as well as a preparation method and application thereof, the preparation method comprises the following steps: (1) injecting a cobalt salt-containing solution and a carbonate solution into a base solution in a parallel flow manner for a coprecipitation reaction to obtain a mixed-phase precursor; and (2) calcining the mixed phase precursor to obtain the spherical cobaltosic oxide, wherein the solute of the base solution in the step (1) is alkali metal hydroxide. According to the method disclosed by the invention, the precursor of the hydroxyl cobalt oxide and cobalt carbonate mixed phase can be prepared without separating kettles, the content of foreign ions in the precursor is low, and small-particle and high-purity cobaltosic oxide can be prepared by directly sintering.

The invention belongs to the technical field of chemical water treatment corrosion prevention, and particularly relates to a corrosion prevention treatment method for a nuclear power plant equipment cooling water system metal material. The pH value is controlled to be 9.0-10.5 by adopting a method of slowly releasing lithium when a lithium type and oxyhydrogen type mixed resin purification bed runs, and impurities are removed by virtue of the resin purification bed so as to control chlorine, fluorine and sulfate radical impurity ions to be less than 50mu g / kg; the dissolved oxygen is controlled to be less than 50mu g / kg by adopting a method of nitrogen coverage at the upper part of the high-level water tank and slow oxidation and oxygen consumption of a metal material in an operation process. The problems existing in the aspect of system medium water discharge treatment are eliminated or simplified, meanwhile, the problems of unqualified water quality and corrosion caused by the fact that a high-concentration corrosion inhibitor leaks into other systems in current corrosion inhibition treatment are solved, and the microbial corrosion risk during corrosion inhibitor treatment is reduced.

The invention provides a method for removing metal impurity ions in a carbonylation synthesis acetic acid catalyst solution and filtering equipment thereof, and belongs to the technical field of metal impurity ion removal in the carbonylation synthesis acetic acid catalyst solution. Comprising the following steps: S1, carrying out preliminary adsorption on heavy metal ion impurities through strong-acid ion exchange resin, S2, carrying out circulating filtration adsorption through a filter assembly, and guiding the adsorbed carbonylation synthesis acetic acid catalyst solution into a cooling chamber, S3, pouring clear water into a processing barrel, and carrying out treatment for 2-3 hours. And the cleaned water-liquid mixture is subjected to centralized adsorption treatment through the magnetic adsorption rod. By arranging the cleaning assembly, the cleaning effect on the inner face and the outer face of the metal filter plate is achieved, the filter assembly does not need to be detached and cleaned independently, the cleaning effect on residual heavy metal ion impurities is further improved, and meanwhile the cleaning efficiency of the filter assembly is improved.

Generation of impurity ions is prevented or reduced in a carbon ion generating device in which a laser-driven ion acceleration system is employed. A carbon ion generating device generates a carbonized region by irradiating a film made of an organic compound with a first laser beam, and generates carbon ions by irradiating at least a part of the carbonized region with a second laser beam.

The invention is suitable for the application field of electrolyte acidity determination, and provides a method for determining the acidity of an all-vanadium electrolyte based on a complexing mass difference method, and the method comprises the following steps: taking the all-vanadium electrolyte, and diluting the all-vanadium electrolyte into a pretreated all-vanadium electrolyte with the concentration of 0.05-0.1 mol / L; adding 1.5-2mL of a complexing masking reagent with the molar concentration of 1.5-2mol / L, weighing, and recording as M1; stirring and titrating, weighing and recording as M2; a quantitative determination method of mass difference is used for calculation, and the formula is {(M2-M1)-0.05} / A * C. In conclusion, a mass difference quantitative determination method is adopted, the vanadium complexing masking reagent is added, the adding amount and the pH value of the vanadium complexing masking reagent are controlled, a stable complex is formed through the complexing masking reagent, vanadium ions and impurity ions, the oxidation-reduction reaction and the precipitation reaction of the complex and sodium hydroxide are inhibited, and the accuracy of the acidity value of the all-vanadium electrolyte is improved.

The invention discloses a method for preparing a vanadium electrolyte by extracting a sodium salt roasting vanadium extraction leaching solution, and belongs to the technical field of vanadium electrolytes. In order to improve the impurity separation depth and the product purity of the vanadium electrolyte, the invention provides a method for preparing the vanadium electrolyte by extracting a sodium salt roasting vanadium extraction leaching solution, which comprises the following steps: removing silicon from the leaching solution, selectively reducing and acidifying, extracting anions, washing, reducing and reversely extracting, degassing and deoiling, and electrolyzing to obtain the 3.5-valent vanadium electrolyte. According to the method, the sodium-modified vanadium-containing leaching solution is used as a raw material, anions in the solution are completely converted into cations in a mode of combining pretreatment deep silicon removal with selective reduction acidification, vanadium is in an anion form, all impurity ions in the solution are efficiently separated through anion extraction-reduction reverse extraction, and the purity of the vanadium-containing leaching solution is improved. The prepared vanadium electrolyte product is extremely low in impurity ion content, the vanadium yield is remarkably improved, and the preparation cost of the high-purity vanadium electrolyte is greatly reduced.

The invention provides an electrolysis method for a solution containing rare earth ions, and relates to the technical field of hydrometallurgy, the electrolysis method comprises the following steps: taking the solution containing rare earth ions as a catholyte, carrying out electrolysis to increase the pH value of the catholyte, obtaining a turbid solution in a cathode chamber, carrying out solid-liquid separation to obtain a solid-phase substance which is a precipitate rich in rare earth or a precipitate rich in impurities, according to the method, the solid-phase substance is separated from the rare earth, so that selective separation and enrichment are realized, that is, when the solid-phase substance is a precipitate containing rare earth, the purpose of preparing a high-grade rare earth enriched substance can be achieved through electrolysis, and when the solid-phase substance is a precipitate containing impurity ions, the purpose of separating the impurity ions can be achieved through electrolysis; according to the electrolysis method, chemical reagents do not need to be added, new ions are not introduced, salt-containing wastewater is not generated, operation is easy, and the process is clean and free of pollution.

The invention discloses a method for measuring the content of ferric ions in an iron-chromium flow battery electrolyte, which comprises the following steps: before the content of the ferric ions is measured, pretreating the electrolyte to be measured to remove the influence of Cr ions and other impurity ions in the electrolyte on an experimental result, and then titrating with a sodium thiosulfate standard solution; the method has the advantages that the method is suitable for directly measuring the content of the ferric ions under the coexistence condition of a large amount of ferrous ions, the problems that in the prior art, when a large amount of ferrous ions and a trace amount of ferric ions coexist, the error is large, and the accuracy is low are solved, and a technical guarantee is provided for capacity recovery and efficiency improvement of the electrolyte of the flow battery.

The invention discloses a wafer cutting protection liquid composition, and belongs to the field of wet electronic chemicals. The composition comprises the following components in percentage by mass: 0.1-5% of a wetting agent, 0.1-2% of a penetrating agent, 0.1-2% of a dispersing agent, 0.1-2% of a pH regulator, 0.1-2% of a nonionic Gemini surfactant and the balance of water, wherein the sum of the mass percentages is 100%. The nonionic Gemini surfactant used in the invention has excellent wettability and permeability, can effectively reduce surface tension at low concentration, does not introduce foreign ions, is easy to rinse, has no residue, and can improve the cleaning ability to particles. The composition prepared from the cutting fluid has good cooling and lubricating effects, has no obvious foam, does not corrode metal to damage an electrode, can protect a wafer from being damaged during cutting, prevents fragments and pollution, is low in irritation and environment-friendly, and meets the environment-friendly requirement.

The invention relates to the technical field of water electrolysis hydrogen production system monitoring, and discloses an electrolytic bath impurity ion monitoring method which comprises the following steps: constructing a digital twin model of an electrolytic bath; acquiring operation parameters of the water electrolysis hydrogen production system and real-time concentration distribution data of various impurity ions, and synchronizing the operation parameters and the real-time concentration distribution data to the digital twinborn model; based on the real-time concentration distribution data, predicting concentration distribution of various impurity ions at the next moment by using a multi-physics field coupling model; and judging whether the concentration of each impurity ion exceeds a set threshold value or not, if so, determining an early warning level through an ion type and early warning level mapping table according to the type of the impurity ion exceeding the threshold value, and performing early warning. According to the invention, through the digital twinning and multi-physical field coupling model, real-time monitoring and prediction of foreign ions in the electrolytic cell are realized, so that the safety and efficiency of the water electrolysis hydrogen production system are improved.

This application discloses a dynamic water device and its control method for simulating the high temperature and high pressure of a nuclear power plant, including a water storage tank, an aeration assembly, a circulation pump, a first branch, a second branch, and an ion control assembly. The water storage tank is used to hold experimental water; the aeration assembly is used to supply gas to the water storage tank; the circulation pump is used to output the aqueous solution from the water storage tank to the first and second branches to form a water circulation; both the first and second branches are equipped with ion control assemblies, which are used to control the concentration of various ions in the aqueous solution to more closely resemble the conditions of the aqueous solution during actual operation. This application uses the first branch to heat and pressurize the aqueous solution to simulate a real high temperature and high pressure environment, and uses the second branch to detect dissolved oxygen, pH, and conductivity of the aqueous solution; both the first and second branches are equipped with ion control assemblies, which can absorb various impurity ions in the aqueous solution and retain and release OH-. ‑ By regulating OH ‑ The concentration is used to adjust the pH of the aqueous solution.

The invention relates to a method for removing impurity ions in high-level liquid waste by using a 3-oxa-glutaramide extractant, which comprises the following steps: mixing and stirring a 3-oxa-glutaramide extractant solution and the high-level liquid waste, carrying out extraction reaction, and removing an organic phase containing the impurity ions to obtain a water phase rich in ruthenium and rhodium ions. Compared with the prior art, the method has the advantages that the impurity ions in the ruthenium and rhodium solution are extracted by using the 3-oxa-pentanediamide extraction agent, so that the separation of ruthenium and rhodium from impurity elements is realized.

This invention discloses a method for preparing high rare-earth-doped low-loss boron-containing glass optical fibers. The steps are as follows: weigh glass raw materials containing rare-earth oxides and boron oxide, mix them uniformly, and place them in a high-temperature furnace. First, heat the mixture under a high-purity nitrogen atmosphere, then switch to a high-purity oxygen atmosphere or a high-purity air atmosphere for continued heating. The resulting glass melt is cooled and annealed to obtain a large glass block. The glass is then processed into a preform and placed in an optical fiber drawing furnace for fiber drawing under a high-purity oxygen atmosphere, thus achieving the preparation of high rare-earth-doped low-loss glass optical fibers. This invention eliminates the additional glass matrix absorption in the near-infrared region caused by boron in boron-containing glass optical fibers and also transforms the transition metal impurity ions from a low valence state with broad absorption in the near-infrared region to a high valence state with narrow low absorption in the near-infrared region. Both of these aspects significantly reduce the matrix absorption of boron-containing glass optical fibers, providing possibilities for the application of high rare-earth-doped low-loss glass optical fibers.

The invention belongs to the field of fine chemicals and glass storage, and particularly relates to composite acid, a preparation method and a method for cleaning glass rainbow spots through the composite acid. The preparation method comprises the following steps: sequentially adding 3-5% of acetic acid, 0.1-0.2% of fatty alcohol-polyoxyethylene ether, 0.3-0.5% of disodium ethylene diamine tetraacetate, 0.5-1.5% of hydrofluoric acid, 1.5-3% of concentrated sulfuric acid and the balance of water to a proper amount of water, and uniformly mixing to obtain a composite acid; the method comprises the following steps: completely immersing glass with rainbow spots in a thermal composite acid solution, taking out the glass, cleaning the glass until no composite acid solution is left, adding calcium carbonate into waste liquid after cleaning is completed, and discharging the waste liquid after the pH value of the waste liquid is qualified. The glass cleaning agent has an efficient and comprehensive decontamination effect on glass rainbow spots, impurity ions difficult to remove are not introduced, and cleaned glass is high in light transmittance, low in haze and small in damage to a glass body.

The invention provides a method for synergistically removing impurities through pH regulation and complexing of ionic rare earth ore leachate, the ionic rare earth ore leachate is stirred and mixed uniformly, a plant polyphenol sulfonic acid derivative complexing agent is added, the complexing agent is prepared through sulfonation, neutralization, concentration and drying by taking gallic acid as a raw material, and the complexing agent can automatically regulate the pH value of the solution and stabilize the pH value at 5.1-5.3; under the condition, phenolic hydroxyl groups, carboxyl groups and sulfonic functional groups in complexing agent molecules preferentially form stable precipitates with impurity ions such as Al < 3 + > and Fe < 3 + > in the leachate, and the complexing effect with rare earth ions (RE < 3 + >) is weak; and after the reaction is completed, carrying out solid-liquid separation to obtain the purified leachate and impurity-containing precipitation slag. The method solves the problem of ammonia nitrogen pollution caused by use of ammonium bicarbonate, ammonia water and other ammonium salts in the traditional process, is a novel method with high impurity removal rate, simple process flow and environmental friendliness, and is suitable for industrial application.

The invention provides a biological extraction agent and a method for extracting gold in cyaniding waste water, and belongs to the field of waste water purification. Histidine is used as a raw material, a total sulfur ester group is introduced into a histidine molecule main chain through a chemical reaction, the total sulfur ester group is combined with gold ions through the dissociation characteristic of sulfydryl under the alkaline condition, and the total sulfur ester group is separated from the total sulfur ester group. The stable multi-element annular gold chelate is formed. The special structure of the imidazole ring side chain is beneficial to the reaction, other metal ions are masked, and selective chelation of gold ions is ensured. The biomass extraction agent provided by the invention can effectively extract gold in cyaniding wastewater, gradient recovery of gold and other metal ions is realized through a reverse extraction process, and the influence of impurity ions on the gold extraction effect is avoided. By regulating and controlling the types, the number and the molecular structures of the functional groups, efficient chelation of activation sites of molecules of the extraction agent and gold ions is guaranteed, and efficient selective extraction of low-concentration gold in the cyanide-containing wastewater is achieved.

The invention relates to the technical field of hydrogen production processes, in particular to a purification device for removing foreign ions in alkali liquor as well as a preparation method and application of the purification device. Based on the characteristic of selective adsorption of layered hydroxides, the device can remove foreign ions in the system. The device comprises a purification unit, and efficient adsorption is realized by utilizing a special crystal structure of layered hydroxide and through selective interaction between intercalation anions and target metal ions. And meanwhile, plasma is adopted to treat the surface of the layered hydroxide, so that adsorption active sites are increased. The device breaks through the limitation that a traditional alkaline hydrogen production system purification device cannot selectively remove cation impurities in the electrolyte, and in-situ continuous operation of electrolyte purification is achieved.

The application relates to the technical field of alumina preparation, and particularly discloses a method for reducing the alkalinity of alumina, which comprises the following operations: firstly, mixing alumina with an additive and an organic acid, then performing ball milling, and finally performing calcination; the additive can promote the adhesion of the organic acid and the alumina; the additive and the organic acid are both decomposed into water and carbon dioxide after calcination. The method for reducing the alkalinity of alumina can effectively reduce the pH value of the alumina, does not introduce other impurity ions, is simple to operate, has low energy consumption, and can be used as an adsorbent, a catalyst carrier and an additive in a battery material.

The invention relates to the field of hydrometallurgy, and discloses a method for converting hafnium oxalate feed liquid into hafnium sulfate feed liquid, which comprises the following steps: adding a sulfuric acid solution and an oxidizing agent into the hafnium oxalate feed liquid, and reacting at a certain temperature to obtain the hafnium sulfate feed liquid. Oxidants used in the method are preferably hydrogen peroxide and ozone, other impurity ions are not introduced, and the purity of the product is not influenced at all. Oxidation products are H2O and CO2 and are basically free of pollution to the environment. The process of evaporation, filtration, calcination, redissolution and the like of a traditional evaporation method and an alkali precipitation-redissolution method is not needed, the operation is simple, the efficiency is high, the cost is low, and the operability is high. The method for adding the sulfuric acid solution and the oxidizing agent into the oxalate feed liquid is also suitable for converting oxalate solutions of other metal ions into sulfate solutions, including but not limited to zirconium oxalate, titanium oxalate, thorium oxalate, scandium oxalate, niobium oxalate, tantalum oxalate, vanadium oxalate, cobalt oxalate, cesium oxalate and rubidium oxalate.

The application relates to an enhanced gallium oxide power transistor and a manufacturing method, the power transistor comprising a beta-Ga2O3 substrate, a beta-Ga2O3 unintentionally doped layer, a p-type NiOx buffer layer, an n-type beta-Ga2O3 channel layer, a p-type NiOx cap layer, a source electrode, a drain electrode and a gate electrode, wherein the beta-Ga2O3 substrate, the beta-Ga2O3 unintentionally doped layer, the p-type NiOx buffer layer and the n-type beta-Ga2O3 channel layer are stacked in sequence; the source electrode is located at one end of the n-type beta-Ga2O3 channel layer, the drain electrode is located at the other end of the n-type beta-Ga2O3 channel layer; the p-type NiOx cap layer is located on the n-type beta-Ga2O3 channel layer and between the source electrode and the drain electrode; and the gate electrode is located on the p-type NiOx cap layer. In the power transistor, a pn junction is formed between the p-type NiOx buffer layer and the upper n-type beta-Ga2O3 channel layer, which can prevent impurity ions in the beta-Ga2O3 unintentionally doped layer from penetrating into the channel layer, reduce the compensation effect of the impurity ions penetrating into the channel layer, improve the electron mobility of the channel layer, and improve the electron concentration in the channel layer and the current density of the device.

The invention relates to the technical field of photovoltaic material manufacturing, in particular to a quartz crucible manufacturing system and method.The system comprises forming equipment arranged in a first closed space and melting equipment arranged in a second closed space, and a discharging port of the forming equipment communicates with a feeding port of the melting equipment; the first air inlet device is communicated with the first closed space, an air inlet of the first air inlet device is lower than a mold forming position in the forming equipment, and the air inlet angle of the first air inlet device is larger than the included angle between an inclined plane formed by the mold forming position and the air inlet and the horizontal plane. The system and method provided by the invention can significantly reduce the impurity ion content of the quartz crucible, improve the purity of the transparent layer and prolong the service life of the transparent layer.

The utility model relates to the technical field of monopotassium phosphate production, and discloses an impurity removal device for monopotassium phosphate, which comprises an impurity removal pool, a crystallizing pool and a delivery pump, the bottom of the impurity removal pool and the bottom of the crystallizing pool are both communicated with a liquid discharge pipe, and a sealing valve is arranged at the port of the liquid discharge pipe; a mounting seat is fixedly mounted on the outer wall of the impurity removal pool, an electric sliding rail is fixedly mounted at the top of the mounting seat, a lifting plate is fixedly mounted at the movable end of the electric sliding rail, after the filter basket enters a solution, the solution can enter the filter basket, crystals separated out by impurities are intercepted by the filter basket, and the impurities are separated out by the lifting plate. The suction pipe in the filter basket sucks the solution entering the filter basket, the solution is transferred into the crystallizing pond through the delivery pump, the hose and the liquid inlet pipe, crystals separated out by impurity ions are still left in the impurity removal pond, and the filter is arranged before the transfer in the whole process, so that the state of the solution can be better maintained; therefore, the solution entering the crystallizing pond is pure enough.