42 results about "NEODYMIUM OXIDE" patented technology

The invention belongs to the technical field of castable, and relates to a refractory castable and a preparation method thereof. The invention provides a refractory castable taking a rare earth compound as a base material. The refractory castable comprises a first composite refractory material, a second composite refractory material, a binding agent, a water reducing agent and water, the first composite refractory material is composed of a first refractory framework and a first auxiliary agent; the first fireproof framework comprises rare earth compound powder; the second composite refractory material is composed of a second refractory framework and a second auxiliary agent; the second fireproof framework comprises rare earth compound powder; the rare earth compound powder is selected from one or more of cerium oxide, lanthanum oxide, neodymium oxide and yttrium oxide; the stability and corrosion resistance of the high-temperature industrial equipment can be improved.

The invention relates to the field of solid waste resource recovery, in particular to a method for recovering iron, calcium and rare elements in red mud through cooperation of magnetic separation and oxalic acid. The method comprises the following steps: mixing red mud with a reducing agent, then carrying out reduction roasting at 600-900 DEG C, grinding the roasted clinker, then carrying out water leaching, carrying out solid-liquid separation, and washing; magnetic separation is conducted on the water leaching residues, and iron ore concentrate and non-magnetic residues are obtained; carrying out sulfuric acid leaching on the non-magnetic slag, filtering to remove impurities to obtain neodymium-rich leachate, treating the leaching residues with hydrochloric acid, and roasting to recover calcium; and oxalic acid is added into the neodymium-rich lixivium for precipitation, a neodymium oxalate product is obtained, and neodymium oxalate is roasted to obtain a neodymium oxide product. The method is simple in process and low in medicament consumption, and realizes efficient separation and comprehensive utilization of iron, calcium and rare elements.

The utility model provides a praseodymium neodymium oxide preparation stock solution firing device, which belongs to the technical field of praseodymium neodymium oxide preparation, and comprises a conveyor belt and a firing furnace, the front surface of the conveyor belt is fixedly connected with the firing furnace, the back surface of the firing furnace is connected with a baffle plate in an embedded manner, the top of the firing furnace is fixedly connected with a servo screw rod, and the servo screw rod is fixedly connected with a motor. The output end of the servo lead screw is fixedly connected with a transmission plate, and the inner side of the firing furnace is fixedly connected with an electric heating pipe. The ventilating fan, the water tank, the conveying pump and the output head are additionally arranged through the fixing frame, the ventilating fan conveys air to the outer surface of the container, the air flow speed of the surface of the container is increased, primary cooling is conducted on stock solution in the container, meanwhile, the conveying pump generates suction force on water in the water tank, and the water is conveyed into the output head; at the moment, the output head atomizes and conveys the water to the outer surface of the container, and further cooling of the stock solution and the container is completed.

The application discloses a kind of low dielectric ultra-low loss high temperature stability neodymium oxide and zinc niobate co-doped barium titanate ceramic and preparation method.The general formula of the ceramic material is (1-x) BaTiO3-xZnNb2O6-xNd2O3, wherein x is 0.1-0.2, and is prepared by traditional solid-phase sintering method, with simple process, good repeatability and high yield.The application introduces Zn 2+ , Nb 5+ And Nd 3+ A / B site collaborative doping is carried out in BaTiO3 matrix, so that the obtained ceramic material realizes excellent comprehensive performance in the range of x=0.145-0.155 while maintaining moderate dielectric constant: extremely low dielectric loss (tanδ≤0.001), excellent temperature stability (ΔC / C 20°C ≤±0.5%, -150-250°C) and high breakdown field strength (E b ≥280kV / cm).The ceramic material is suitable for scenes with strict requirements on dielectric properties, temperature stability and breakdown field strength, and can be applied in fields such as aerospace extreme environment electronic components, new energy vehicle power modules and precision high-frequency sensing equipment, with significant application value and market potential.

The invention provides a rare earth oxide doped yttrium oxide stabilized zirconia ceramic material as well as a preparation method and application thereof, and belongs to the technical field of ceramic materials and industrial equipment protection. According to the preparation method, yttrium oxide stabilized zirconia is taken as a matrix phase, lanthanum oxide, cerium oxide, gadolinium oxide or neodymium oxide is taken as a doping phase, and the rare earth oxide doped yttrium oxide stabilized zirconia ceramic material is prepared through a solid-phase reaction and a spark plasma sintering technology. Through the microstructure and phase composition of rare earth element doped optimized yttrium oxide stabilized zirconium oxide, the cavitation erosion resistance and mechanical property of the material are remarkably improved, and the material is suitable for preparing fluid equipment runner components such as hydraulic pump impellers and valve elements.

This application discloses a phosphorus pig iron stabilizer for aluminum electrolysis. The stabilizer has a core-shell structure, comprising an improver as the core, a desulfurizing agent as the first outer shell coated on the improver, and a carbonizing agent as the second outer shell coated on the first outer shell. The improver includes one or more of ferrosilicon, calcium silicon, lanthanum oxide, cerium oxide, yttrium oxide, praseodymium oxide, and neodymium oxide. The phosphorus pig iron stabilizer disclosed in this application can effectively solve the elemental imbalance problem during the reuse of phosphorus pig iron and improve various problems caused by elemental imbalance.

The invention is applicable to the field of preparation of rare earth ceramic pigments, and provides a preparation method of a rare earth ceramic pigment for building wall surfaces, which comprises the following steps: S1, weighing industrial neodymium oxide and aluminum oxide in equal proportion, adding water, mixing and grinding to obtain slurry A; s2, weighing yttrium oxide and aluminum hydroxide in equal proportion, adding water and chromium sesquioxide, and mixing and grinding to obtain slurry B; s3, mixing the slurry A obtained in the step S1 and the slurry B obtained in the step S2 to obtain slurry C; and S4, the slurry C is poured into a drying cylinder to be dried, a stirring mechanism is arranged in the drying cylinder to stir and heat the slurry C, and a spiral conveying mechanism in the drying cylinder drives the slurry C to be vertically conveyed. The problems that in a traditional drying process, due to the fact that the conveying speed is not matched with the heating uniformity, the drying efficiency is low, and materials are heated unevenly are solved.

The application relates to a conductive paste special for an electrostatic chuck and a preparation method and application thereof, and the conductive paste is prepared by the following mass percentages: tungsten powder 80-85%, neodymium oxide 0.4-0.8%, aluminum oxide 1-1.5%, silicon dioxide 1-1.5%, an organic carrier 10-16% and a dispersing agent 1.5-2.8%. When the conductive paste is applied to an electrode layer in the electrostatic chuck by introducing neodymium oxide particles, the compactness of the electrode layer can be obviously improved, the square resistance is reduced, excellent conductive performance is exhibited, the electrostatic chuck has good electrostatic adsorption capacity, meanwhile, the silicon dioxide and the aluminum oxide are wetly penetrated into the inside of a ceramic base of the electrostatic chuck and form a mechanical interlocking structure with the ceramic, so that the bonding force between the electrode layer and the ceramic base is enhanced.

The invention discloses a samarium monatomic and strontium-doped neodymium oxide composite catalyst and a preparation method thereof, a nonylphenol electrochemical sensor and application thereof. The preparation method of the composite catalyst comprises the following steps: adding resorcinol, a formaldehyde solution and Sm (NO3) 3.6 H2O into an absolute ethyl alcohol-based colloidal suspension to carry out sol-gel treatment, and carrying out carbonization and etching to obtain Sm-SAC; the preparation method comprises the following steps: dropwise adding a first solution containing strontium hydroxide and neodymium nitrate hexahydrate into a second solution containing 1, 2, 3-triazole, trimesic acid and polyvinylpyrrolidone to prepare a Sr-Nd bimetallic precursor, annealing to obtain strontium-doped neodymium oxide, adding the Sm-SAC and the strontium-doped neodymium oxide into water, and carrying out ultrasonic dispersion, centrifugation, washing and drying to obtain the composite catalyst. The composite catalyst provided by the invention has strong adsorption capacity, efficient electrocatalytic oxidation activity, excellent anti-interference capability and structural stability, and the sensor has high recovery rate, low signal attenuation and excellent reusability.

The invention discloses a method for directly preparing neodymium iron boron powder from neodymium oxide and application, and the method comprises the following steps: S1, neodymium oxide, an iron source, a boron source and a carbon reducing agent are obtained, and the molar ratio of neodymium to iron to boron to carbon is 1: (13-15): 1: (2.8-3.5); s2, mixing the raw materials obtained in the step S1, and refining the raw materials until the granularity is 1-10 microns to obtain a mixture; s3, granulating or pre-pressing the mixture; and S4, putting the mixture treated in the step S3 into a high-temperature-resistant container, raising the temperature to 200-400 DEG C, preserving heat for 0.5-2 hours, raising the temperature to 1100-1400 DEG C, preserving heat for 0.5-6 hours, cooling and taking out. According to the technical scheme, the effects of remarkably reducing or avoiding dependence on strong-activity reducing agents such as Ca / CaH2 and the treatment cost of byproducts caused by dependence on strong-activity reducing agents such as Ca / CaH2 and improving the purity and the yield of the Nd2Fe14B phase are achieved.

The invention belongs to the technical field of preparation of high-temperature-resistant adhesives, and discloses a preparation method of a neodymium oxide modified aluminum phosphate-based high-temperature adhesive for aluminum nitride connection. Aiming at the problems of insufficient high temperature resistance, low bonding strength, high brittleness, poor thermal shock resistance and water resistance and the like of a pure aluminum phosphate adhesive, the comprehensive performance of the adhesive is improved through neodymium oxide doping modification and process optimization. The preparation method comprises the following steps: reacting neodymium oxide with dilute phosphoric acid to prepare adhesive cement, and adding silicon and boron carbide for modification to prepare the adhesive. The adhesive does not need high-temperature sintering, is primarily cured at normal temperature for 24 hours, can be used after being dried at 150 DEG C, and is suitable for industrial mass production. After high-temperature treatment at the temperature of 1300 DEG C, the bonding strength is not lower than 35 MPa and is far better than that of a pure aluminum phosphate adhesive; stable ceramic phase structures such as aluminum phosphate and neodymium phosphate are formed at high temperature, the interface compatibility is excellent, the thermal stability is outstanding, the problem of high-temperature bonding of aluminum nitride ceramic can be effectively solved, and the aluminum nitride ceramic can be widely applied to the fields of high-temperature structure connection such as aerospace and steel manufacturing.

This invention relates to the field of coating technology, specifically to anti-condensation coatings, methods of application, and coating apparatus. The anti-condensation coating includes an individually packaged coating body and an individually packaged surface spray powder. The surface spray powder comprises nano-sized boron fiber powder, nano-sized graphene powder, and nano-sized metal oxide powder, wherein the nano-sized metal oxide powder is at least one of nano-sized cerium oxide powder, nano-sized yttrium oxide powder, and nano-sized neodymium oxide powder. Such an anti-condensation coating has the advantage of better anti-condensation effect. The anti-condensation coating coating apparatus includes a frame, a first roller wound with cable raw material wire, a second roller wound with coated cable wire, a first coating chamber, and a second coating chamber. Such an anti-condensation coating coating apparatus also has the advantage of being able to apply the anti-condensation coating.

Disclosed herein are compositions having enhanced oxygen storage capacity (OSC). The high OSC compositions contain zirconium oxide, cerium oxide, and optionally one or more rare earth oxides other than cerium. These optional further rare earth oxides may be yttrium oxide, lanthanum oxide, neodymium oxide, praseodymium oxide, or mixtures thereof. These compositions have an oxygen storage capacity of from about 40 [mu] mol-O2 / g to about 300 [mu] mol-O2 / g after calcination in air at a temperature of about 900 DEG C for about 5 hours. Further disclosed are methods of making these compositions with enhanced oxygen storage capacity (OSC). The composition may be used as a catalytic support or as part of a catalyst system.

The invention relates to the field of lithium iron phosphate positive electrode materials, in particular to a lithium iron phosphate positive electrode material with low interface impedance as well as a preparation method and application thereof, which are used for solving the problems of low electrochemical performance, poor charge-discharge efficiency and short cycle life of the existing lithium iron manganese phosphate positive electrode material. According to the positive electrode material, oxygen is doped in a Li2ZrCl6 crystal structure, rapid transmission of lithium ions on an interface layer is promoted, the conductivity is increased, neodymium oxide and iridium are loaded on expanded graphite to form a conductive path, the loaded expanded graphite and polyphenylene sulfide are blended to form a conductive network, and the conductivity of the positive electrode material is improved through a synergistic effect; the high cycle stability and safety of the positive electrode material can reduce the full life cycle cost of an energy storage system, the high rate capability can realize rapid charging of electronic equipment, and the positive electrode material can be widely applied to the fields of portable electronic equipment, energy storage systems and the like.

This invention discloses a method for preparing a highly compatible anti-bubble and anti-crystallization functional layer for the inner layer of a quartz crucible, relating to the field of quartz crucible preparation technology. It aims to solve the problem that existing solutions cannot simultaneously address anti-bubble, anti-crystallization, compatibility, and industrialization requirements. The method includes: preparing an inhibitory layer suspension, the components of which, by mass percentage, are 92-97% fused quartz micropowder, 0.5-2% neodymium oxide micropowder, 2.1-5.5% KH550, and the balance deionized water, mixing to obtain a suspension with a viscosity of 60-90 mPa·s; applying the suspension to the inner surface of a quartz sand blank using a dual-co-directional rotary spraying process, followed by gradient heating at 40-50℃ to solidify and form a 50-100 μm thick functional layer; and then arc melting and cooling the blank to obtain the quartz crucible. This invention achieves dual functions of anti-bubble and anti-crystallization, exhibits strong compatibility with the substrate without damage, is compatible with existing production lines, has low energy consumption and cost, can significantly extend the service life of the crucible, improves the quality of monocrystalline silicon, and is suitable for industrial mass production.

This invention relates to the field of castable technology, and proposes a high-temperature resistant ladle castable and its preparation method. The high-temperature resistant ladle castable comprises the following components by weight: 60-80 parts high-alumina bauxite, 2-5 parts magnesia, 10-15 parts magnesia-alumina spinel, 4-8 parts alumina, 2-5 parts fused magnesia, 1-5 parts calcium aluminate cement, 0.5-1.5 parts silica fume, 0.2-0.5 parts water-reducing agent, 8-15 parts silicon carbide whiskers, 2-4 parts dispersant, 1-2 parts zirconium oxide, and 0.5-1.7 parts neodymium oxide. This technical solution solves the problem in existing technologies where the incorporation of magnesia-alumina spinel leads to a decrease in the slag erosion resistance of the castable.

The application provides a silicon nitride ceramic and a pressureless sintering method and application thereof, and belongs to the technical field of ceramic materials. The application uses yttrium aluminum garnet and magnesium oxide as sintering aids, controls the sintering temperature and time of the yttrium aluminum garnet, reduces the formation of the subcrystal phase YAP, can provide more sintering power for the pressureless sintering process of the silicon nitride ceramic, can promote the sintering densification of the silicon nitride ceramic at a lower liquid phase formation temperature, and simultaneously adds neodymium oxide, so that the silicon nitride ceramic prepared by pressureless sintering simultaneously has excellent hardness, strength and fracture toughness.

The invention discloses a filter press for sludge treatment in praseodymium neodymium oxide extraction and preparation, and relates to the technical field of sludge treatment appliances, the filter press comprises a supporting seat and a rack fixedly connected to the top of the supporting seat; a'blockage index 'model is constructed through the analysis module, early warning is carried out in advance when the filter plate is not completely blocked, and the problems that the pressure of a drainage pipe suddenly rises and the water content of a filter cake exceeds the standard due to blockage are avoided; a linkage structure of'elastic sliding and transmission belt impurity removal 'is designed at the position of the filter plate, so that'filtering while dredging' is realized, and the impurity removal efficiency is improved; through the shaking design of the filter plate, the permeability of the filter holes is maintained at a relatively high level; closed-loop control is achieved by analyzing the relation between the impurity discharge amount in unit time and the historical discharge amount threshold value, insufficient dredging and excessive dredging are avoided, and dredging energy consumption is reduced. And meanwhile, a fault hose can be accurately positioned through a blockage warning signal, workers do not need to check one by one, and the maintenance time is shortened.

The invention belongs to the technical field of concrete, and relates to low-temperature-resistant high-strength concrete and a preparation method thereof. The concrete comprises a rare earth compound admixture, wherein the rare earth compound admixture is prepared from neodymium oxide, lanthanum oxide and cerium oxide. The concrete has excellent compression resistance and can be suitable for a cold environment.

This invention belongs to the field of functional coatings, specifically disclosing an infrared stealth coating, its preparation method, and its application. The coating comprises a first ceramic layer, a second ceramic layer, and a modified layer stacked sequentially. The first ceramic layer is made of yttrium-stabilized zirconium oxide. The second ceramic layer is made of zirconium oxide and at least two oxides selected from yttrium oxide, gadolinium oxide, ytterbium oxide, cerium oxide, thulium oxide, and neodymium oxide doped in the zirconium oxide. The modified layer contains Ti, Al, or an AlTi alloy. The coating of this invention, by introducing a modified layer to encapsulate the ceramic layer, exhibits high bonding strength between the ceramic layer and the modified layer, exceeding 70 MPa, and possesses excellent thermal insulation performance and low infrared emissivity. Specifically, the coating's thermal conductivity from room temperature to 1500℃ is <1 W / m·K, and its infrared emissivity under atmospheric conditions is ≤0.55.

The application provides a neodymium-doped ternary positive electrode material and a preparation method and a lithium ion battery, and belongs to the technical field of new energy materials of lithium ion batteries.The preparation method comprises the following steps: (1) mixing a nickel-cobalt-manganese precursor, neodymium oxide and a lithium source, grinding and sieving after first sintering to obtain an intermediate material; (2) grinding and sieving the intermediate material obtained in the step (1) after second sintering to obtain the neodymium-doped ternary positive electrode material.The application controls lattice distortion by doping with rare earth neodymium, inhibits volume expansion during charging and discharging, optimizes the stability of an electrode / electrolyte interface, reduces interface impedance, significantly improves the reversible capacity, rate performance and cycle service life of a battery assembled from the positive electrode material, adopts a two-stage step sintering mode, makes the neodymium uniformly solid-solution-dope the positive electrode material, and improves the electrochemical performance of the battery assembled from the positive electrode material.

The application discloses praseodymium-neodymium oxide and a preparation method thereof. The preparation method comprises the following steps: 1) adding a praseodymium-neodymium chloride solution and ammonia water into an ammonium acetate solution in a parallel flow mode, performing solid-liquid separation after the reaction is completed, and obtaining a praseodymium-neodymium oxide precursor; 2) performing calcination on the praseodymium-neodymium oxide precursor, and obtaining praseodymium-neodymium oxide. The praseodymium-neodymium oxide has a porous sheet structure. The praseodymium-neodymium oxide with the porous sheet structure can be obtained by using the preparation method.

The invention discloses a coal gas fire erosion and thermal shock resistant integrated taphole protection brick and a forming method thereof, the protection brick comprises a compact working layer, a honeycomb buffer layer and a tough supporting layer, the protection brick is formed by splicing four fan-shaped brick bodies through a mortise and tenon interlocking structure, and raw materials adopt a chromium-free composite formula. The tough supporting layer comprises, by weight, 62%-68% of aggregate materials, 27%-32% of matrix materials and 3%-5% of functional additives, 5% of aluminum titanate low-expansion agents are additionally added to the tough supporting layer, the aggregate materials comprise white corundum, silicon nitride combined silicon carbide, graphite and magnesium aluminate spinel, the matrix materials comprise yttrium-stabilized zirconia micro powder, the functional additives comprise neodymium oxide and nickel-chromium alloy fibers, and the neodymium oxide and the nickel-chromium alloy fibers are evenly distributed on the tough supporting layer. The forming method adopts mixing, three-section type pressurization vibration forming, microwave and hot air combined drying, medium and low temperature sintering and tenon-and-mortise assembling processes, and the environment-friendly requirement is met while the high-temperature erosion resistance and gas corrosion resistance of the protection brick are guaranteed.

The utility model belongs to the field of rare earth or non-ferrous metal smelting separation devices, and particularly relates to a device suitable for calcining and mixing rare earth praseodymium neodymium oxide in industry. The device comprises a rare earth praseodymium neodymium oxide calcining device and a rare earth praseodymium neodymium oxide mixing device, the rare earth praseodymium neodymium oxide calcining device comprises a stock bin (1), a sagger (3), a roller kiln (5) and a screening machine (8), the stock bin (1) is connected with the sagger (3) through the spiral blanking automatic filling device (2); the saggar (3) is connected with the roller kiln (5) through the roller platform (4); a dust collector (6) is arranged at the outlet end of the roller kiln (5) and connected with a dust collecting bin (7). The device is matched with the dust collection device, so that on-site dust is reduced, the loss of praseodymium and neodymium oxide is avoided, the working environment is improved, the labor intensity of operators is reduced, and the working efficiency is improved.

The utility model relates to the technical field of coated cover plates, in particular to a novel coated cover plate with thermal stability. The glass comprises a glass base layer, a bottom layer, a middle layer and a top layer, the bottom layer covers the glass base layer and provides a stable basis for other coating layers; the middle layer is plated on the bottom layer and is used for improving the optical performance and durability of the glass base layer; and the top layer is plated on the middle layer and is used for improving the thermal stability of the glass film layer. According to the utility model, by utilizing the excellent characteristics of neodymium oxide (Nd2O3), neodymium fluoride (NdF3) and aluminum nitride (AlN) and accurately controlling the deposition of chemical substances on the surface of the glass, a layered structure with specific functions and performances is formed, so that the optical performance, durability and thermal stability of the glass are obviously improved, and the strict requirements of future high-tech products are met.

The application provides a high-temperature nickel-hydrogen battery formula and a preparation process. The positive electrode of the high-temperature nickel-hydrogen battery comprises a base body of foamed nickel, active material of spherical nickel hydroxide, a conductive agent of cobaltous oxide, a binder of sodium carboxymethyl cellulose, an additive of zinc oxide and cerium oxide; the negative electrode comprises a base body of copper mesh, active material of hydrogen storage alloy powder, a binder of polytetrafluoroethylene emulsion, and an additive of neodymium oxide; and the electrolyte comprises sodium hydroxide, potassium hydroxide and barium hydroxide. The positive electrode, a polypropylene diaphragm and the negative electrode are wound into an electric core, a layer of polyimide film is wound outside the electric core, and then the electric core is loaded into a battery steel shell, electrolyte is injected, the battery shell is sealed, and the high-temperature nickel-hydrogen battery is obtained through charging and discharging treatment. The high-temperature nickel-hydrogen battery of the application inhibits the release of oxygen in the positive electrode by adding zinc oxide to the positive electrode, and the addition of cerium oxide can prevent the failure of the spherical nickel hydroxide to a certain extent at a high temperature of more than 50 DEG, so that the charging efficiency of the positive electrode is obviously improved.

The invention discloses a preparation method of an anti-bubble and anti-crystallization functional material layer of an inner layer of a high-compatibility quartz crucible, relates to the technical field of quartz crucible preparation, and aims to solve the problem that the existing scheme cannot give consideration to the requirements of bubble prevention, crystallization prevention, compatibility and industrialization. The method comprises the following steps: preparing an inhibition material layer suspension which comprises the following components in percentage by mass: 92-97% of fused quartz micro powder, 0.5-2% of neodymium oxide micro powder, 2.1-5.5% of KH550 modified sol and the balance of deionized water, and mixing to obtain a suspension with the viscosity of 60-90 mPa.s; the inner surface of a quartz sand blank is coated with the suspension liquid through a double-same-direction rotary spraying technology, and a functional material layer with the thickness of 50-100 micrometers is formed through gradient heating curing at the temperature of 40-50 DEG C; and carrying out electric arc melting on the green body, and cooling to obtain the quartz crucible. The anti-bubble and anti-devitrification double functions are achieved, the compatibility of the material layer and the substrate is high, damage is avoided, the crucible is adaptive to an existing production line, energy consumption and cost are low, the service life of the crucible can be remarkably prolonged, the quality of monocrystalline silicon is improved, and the crucible is suitable for industrial mass production.

The application provides a cutting fluid and application and a cutting fluid circulation system. The cutting fluid comprises: an extreme pressure agent, a lubricant, a coolant, a defoaming agent, a corrosion inhibitor and a surfactant; the mass ratio of the extreme pressure agent, the lubricant, the coolant, the defoaming agent, the corrosion inhibitor and the surfactant is 2-15:1-30:1-30:0.01-2:0.1-2:0.1-40; the extreme pressure agent comprises at least one of a sulfurized alkene and a sulfurized fatty acid ester, and is free of chlorine and phosphorus; the lubricant comprises at least one of castor oil triethanolamine and tall oil; the coolant comprises diethyl ethanol; the defoaming agent comprises at least one of a silicone oil emulsifier and a higher alcohol; the corrosion inhibitor comprises triethylene glycol maleate; and the surfactant comprises octylphenyl alcohol. In this way, when a neodymium iron boron magnet is cut by using a diamond wire cutting process, the dissolution of neodymium oxide in the neodymium iron boron magnet cutting waste by the cutting fluid can be avoided, and the recycling rate of the neodymium iron boron magnet cutting waste can be improved.

The invention belongs to the crossing field of functional materials and anti-counterfeiting technologies, and discloses specialty paper containing CaAl2O4: Pr < + >, Nd < + > luminescent materials and a preparation method thereof, and the preparation method comprises the following preparation steps: firstly, grinding calcium carbonate, aluminum oxide and boric acid in a mortar to realize preliminary uniform mixing, then adding praseodymium neodymium oxide, and continuing grinding; after the raw materials are fully mixed, the sample powder is subjected to tabletting treatment, tablets are sequentially put into small crucibles, the adjacent tablets are spaced, and then the small crucibles are put into a large crucible containing graphite powder; putting the large crucible into a high-temperature furnace, slowly heating to a sintering temperature at a certain heating rate, preserving heat, naturally cooling to room temperature, and taking out a sample in the crucible; and finally, fully grinding the sample by using a mortar, and controlling the grinding temperature to obtain CaAl2O4: Pr < + >, Nd < + > luminescent powder. And adding the prepared CaAl2O4: Pr < + >, Nd < + > luminescent powder into the pulped paper pulp solution, and carrying out papermaking on the mixed paper pulp solution to obtain the specialty paper containing the CaAl2O4: Pr < + >, Nd < + > luminescent powder. A high-temperature solid-phase method is adopted, the process is mature and stable, operation is easy and convenient, complex equipment is not needed, and the method is suitable for industrial large-scale production. The compounding process of the luminescent material and paper pulp is simple and easy to popularize and apply in the papermaking industry.

The application discloses a filter press for treating sludge in preparation of praseodymium-neodymium oxide, and relates to the technical field of sludge treatment tools, which comprises a supporting base and a rack fixed on the top of the supporting base; the application constructs a "blockage index" model through an analysis module, gives an early warning when the filter plate is not completely blocked, and avoids problems such as sudden increase of the pressure of a drain pipe and excessive moisture content of filter cake caused by blockage; a linkage structure of "elastic sliding + transmission belt impurity removal" is designed at the position of the filter plate to realize "filtering and dredging simultaneously", and the impurity removal efficiency is improved; the shaking design of the filter plate maintains the filter hole permeability at a high level; closed-loop control is realized by analyzing the relationship between "unit time impurity discharge" and "historical unit discharge threshold value", "insufficient dredging" and "excessive dredging" are avoided, and the dredging energy consumption is reduced; meanwhile, the blockage warning signal can accurately locate the fault hose, workers do not need to check one by one, and the maintenance time is shortened.