101results about How to "Lower melting temperature" patented technology

The invention discloses a matte glaze and a preparation method thereof. The matte glaze comprises the following components by weight: 1-5 parts of zinc oxide, 5-15 parts of barium carbonate, 0-15 parts of zirconium silicate, 10-25 parts of potassium feldspar, 10-20 parts of kaolin, 5-15 parts of calcite, 5-15 parts of calcined talcum powder, 20-35 parts of a matte frit and 0.5-1 part of an additive. Specifically, the matte frit comprises the following components by weight: 30-50 parts of SiO2, 15-20 parts of Al2O3, 0.01-0.5 part of Fe2O3, 3-10 parts of CaO, 0.5-5 parts of MgO, 1-5 parts of K2O, 3-10 parts of Na2O, 3-10 parts of ZnO, 0.1-1 part of B2O3 and 10-25 parts of BaO. By introducing the matte frit, the melting temperature of the formula is lowered, the firing range of the formula isbroadened, and the glaze texture achieves a fine matte effect.

The invention belongs to the technical field of architectural ceramics, and particularly discloses radiation refrigeration glaze, a preparation method thereof and a lightweight ceramic tile. The radiation refrigeration glaze comprises a basic glaze and radiation refrigeration powder, the radiation refrigeration powder comprises nano-porous alumina and metallic oxide doped magnesium aluminate spinel, and the metallic oxide is selected from at least one of iron sesquioxide, manganese dioxide, cobalt sesquioxide and copper oxide. According to the invention, nano-porous alumina and metallic oxide doped magnesium aluminate spinel are compounded as radiation refrigeration powder, and the radiation refrigeration powder is added into the cover glaze of the light ceramic tile, so that not only are good glaze quality and tile shape obtained, but also the sunlight reflectivity ratio of the glaze is improved, thereby achieving a good radiation refrigeration effect, and improving the service life of the light ceramic tile. The sunlight reflectivity reaches up to 88-94%, the glaze quality and the brick shape are good, and the surface flatness is + / -0.3 mm.

The invention discloses a bio-based isosorbide carbonate plasticizer and a preparation method and application thereof, and relates to the technical field of plastic processing assistants.The preparation method of the bio-based isosorbide carbonate plasticizer comprises the steps that in the atmosphere of protective gas, diester carbonate and isosorbide serve as raw materials to be subjected to transesterification with a catalyst; and after the reaction is completed, carrying out post-treatment to obtain the isosorbide carbonate plasticizer. The isosorbide carbonate plasticizer disclosed by the invention can effectively reduce the melting temperature and melt viscosity of a material, improve the processability of the material, increase the flexibility of the material and improve the optical transmittance of the material. The preparation method disclosed by the invention has the characteristics of being simple in process, green and environment-friendly, easily available in raw materials, easy in catalyst separation and relatively high in product yield, and is an efficient and environment-friendly preparation process of isosorbide carbonate.

The invention relates to a method for preparing a polyolefin film by using a volatile solvent, which comprises the following steps: (1) weighing polyolefin resin and a volatile organic solvent, stirring and fully mixing to obtain a uniform mixed solution; (2) feeding the obtained uniform mixed solution into a double-screw extruder to obtain a high-temperature melt, and carrying out curtain coating and cooling to obtain a membrane; and (3) stretching the obtained membrane to obtain a porous membrane, and carrying out heat setting to obtain a finished product membrane. Compared with the prior art, the method has the advantages that the solvent extraction process is reduced, the porosity of the membrane is adjustable in the range of 40-85%, the preparation process is green and environment-friendly, and the method has potential application in the fields of battery diaphragms, water treatment, breathable and moisture permeable fabrics and the like.

The invention discloses glass powder for conductive gold paste as well as a preparation method and application thereof. The basic component of the glass is a compound system of P2O5-SiO2-B2O3-Al2O3 and Bi2O3-SiO2-B2O3-Al2O3, and Na2O, CaO, CuO, Sb2O3, ZrO2, NaF and the like are respectively added into the basic glass component, so that the single glass system and the compound glass powder have lower glass transition temperature and excellent high-temperature fluidity, and have excellent wetting and sintering-assisting effects on the gold powder. The average particle size of the glass powder is 2-3 microns, and the thermal expansion coefficient of the glass is 6.0-8.5 ppm / DEG C. When the glass powder is used in the conductive gold paste, the conductive gold paste can have firm physical and chemical bonding with an aluminum oxide ceramic substrate and an aluminum nitride ceramic substrate, and after being sintered on the substrate, the conductive gold paste has relatively high electrical properties (4.5-15.3 m omega), excellent adhesive force (10-25N) and good chemical stability (weight loss is lower than 0.5%).

The invention relates to the field of packaging materials, in particular to a high-barrier waterproof and oil-proof PHA composite film, a preparation method of the PHA composite film and a prepared protective inflatable bubble bag and paper cup. Comprising the following steps: dispersing PHA particles in a dispersion liquid to obtain a PHA dispersion with the solid content of 1-3%, and then carrying out vacuum distillation to obtain a PHA dispersion with the solid content of 60-70%; the method comprises the following steps: coating a PHA dispersion with the solid content of 60-70% on a base material, and drying at 145-155 DEG C to form a coating on the base material; and carrying out hot pressing on the surface containing the coating at 175-185 DEG C to obtain the PHA composite film. Through the production process, the obtained PHA dispersion with the solid content of 60-70% is subjected to coating, curing and hot pressing to form a stable PHA layer, so that the obtained PHA composite film has better barrier property and physical property.

The invention discloses a preparation method and application of large-size high-strength electronic glass, and relates to the technical field of photoelectric display glass, matrix glass prepared through the method has high transmittance, the surface of the matrix glass is smooth and transparent through grinding and polishing, further expansion of cracks can be blocked after heat treatment, the strength of the glass is further improved, and the service life of the glass is prolonged. The display panel is especially suitable for photoelectric display equipment.

The invention discloses a fly ash and multi-source solid waste plasma melting collaborative resource treatment system and process method, and the system comprises a fly ash stock bin, a fly ash stock bin, a binder storage tank, a material intermediate bin, a glass stock bin, a stirrer, an extrusion forming granulator, a plasma furnace and a control center, normal operation of the whole system is completed through a co-processing mode between fly ash and fly ash, accurate matching, quantitative matching of a binder and coordination and matching of valves of all devices. Resourceful treatment of various solid wastes such as fly ash, fly ash and waste glass bottles is realized, the fly ash and fly ash are mixed to form a low-melting-point mixture, low-temperature generation of a liquid phase is promoted, the melting temperature is reduced, the energy efficiency is improved, the treatment cost is saved, and meanwhile, a stable glass phase is formed; according to the plasma furnace, the raw materials are granulated after being mixed, and the process that powdery materials directly enter the furnace is replaced, so that the problem that slag is difficult to discharge in the plasma furnace is solved, and secondary dust raising is prevented.

The invention relates to the technical field of solid waste thermochemical treatment, and provides a method for treating waste incineration fly ash through plasma melting. Fly ash is pretreated and then enters a plasma furnace to generate a solid melt, the solid melt is quenched into vitreous slag through a slag cooler, and high-temperature waste gas generated by the melting furnace enters a high-temperature waste gas pretreatment and gas treatment system to be purified into gas meeting the environmental protection standard. An active carrier of organic particles prepared from silicon resin and silicon dioxide is added into the fly ash, so that dioxin molecules and heavy metals in the fly ash are respectively and firmly wrapped by a three-dimensional network, and the harmless reduction treatment problem of dioxin and cured heavy metals is solved; meanwhile, the problems that when plasma equipment treats the waste incineration fly ash, the melting glass transition temperature is too high, and the fly ash diffuses along with tail gas in the feeding process, so that a pipeline is blocked are solved.

The invention relates to the technical field of metal casting, in particular to casting powder for continuous casting of a high-carbon steel slab and a continuous casting method. The casting powder comprises the following components in parts by weight: 15-50 parts of a pre-melting material, 10-30 parts of wollastonite, 3-10 parts of quartz, 3-8 parts of albite, 2-5 parts of magnesia, 2-4 parts of borax, 10-15 parts of sodium carbonate, 1-3 parts of lithium carbonate, 1-2 parts of bentonite, 4-8 parts of graphite, 1-3 parts of an adhesive and 1-4 parts of isopropyl trioleate acyloxy titanate. The invention also provides a preparation method of the composition. Compared with the prior art, the prepared casting powder has the advantages of being free of fluorine, environmentally friendly, good in melting performance and the like.

The invention relates to the technical field of optical glass manufacturing, in particular to high-refractive-index glass as well as a preparation method and application thereof. The transition metal is less than 4 ppm by mass, and the transition metal comprises one or more of Fe, Cr, Ni, Cu, Mn, Co and V; the oxide is prepared from the following components in mole percent based on the oxide: 17 mol% to 49 mol% of Bi2O3, 2.7 mol% to 15.7 mol% of Nb2O5, 8.5 mol% to 39 mol% of TeO2, 2 mol% to 19.5 mol% of P2O5, 11.3 mol% to 41 mol% of B2O3, 0 mol% to 1 mol% of TiO2, 0 mol% to 1 mol% of Ta2O5, 0 mol% to 1 mol% of WO3 and 0.5 mol% to 16.5 mol% of ZnO, and Bi2O3 / (TeO2 + TiO2 + WO3 + Nb2O5 + Bi2O3) * 100 is more than or equal to 30 and less than or equal to 75. Tests show that when the thickness of the glass is 10 mm, the refractive index of the glass is 2.09-2.35, and the transmittance of the glass with the wavelength lambda 70 smaller than 450 nm is 82.4%-96.8%. The problems that in the prior art, high-refractive-index glass is low in refractive index and light transmittance and low in performance and cost ratio, and the increasingly-developed visual experience and development requirements of head-mounted displays cannot be met are solved.

The invention belongs to the field of composite brazing filler metal, and relates to tin-based high-entropy alloy composite brazing filler metal and a preparation method thereof. The problems that an existing lead-free brazing filler metal is complex in preparation and poor in comprehensive performance are solved. The tin-based high-entropy alloy composite brazing filler metal or composite solder paste is prepared by taking tin-based brazing filler metal as a matrix and high-entropy alloy as a reinforcing phase and adding high-entropy alloy powder with the mass fraction of 0.1-10% into tin-based brazing filler metal powder or solder paste. The tin-based high-entropy alloy composite brazing filler metal is excellent in wettability, mechanical property and the like, the preparation method is simple, the cost is low, the production efficiency is high, and the tin-based high-entropy alloy composite brazing filler metal is mainly suitable for the field of electronic packaging.

The invention discloses high-alkali-resistance glass and a preparation method and application thereof.The preparation method comprises the steps that evenly-mixed ingredients are added into a platinum crucible at the temperature of 1400-1500 DEG C, the platinum crucible is placed in a lifting furnace to be subjected to heat preservation for 60-80 min at the temperature of 1550-1580 DEG C, then the crucible is taken out, and molten liquid is poured onto a mold; after the molten liquid is formed, quickly transferring the molten liquid into an annealing furnace, keeping the temperature at 550-580 DEG C for 30 minutes, and cooling the molten liquid to room temperature along with the furnace to obtain the high-alkali-resistance glass. The corrosion rate of the prepared high-alkali-resistance glass is 7-14 mg / dm < 2 >, the alkali resistance of the high-alkali-resistance glass is far lower than the industrial standard that the alkali resistance of the high-alkali-resistance glass is smaller than or equal to 75 mg / dm < 2 >, the weight loss of the glass in a NaOH solution with the ph being larger than 12 is small, and the high-alkali-resistance glass can be used for containing strong-alkali liquid medicine such as phenytoin sodium for injection and omeprazole for injection and other injections with the ph being larger than 11. And the problems of sheet falling or influence on liquid medicine quality caused by poor alkali resistance can be avoided.

A method for preparing a high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite material, which relates to a method for preparing a SiBCN ceramic-based composite material. The present invention aims to solve the problem that the existing carbon fiber or cracked carbon coated carbon fiber reinforced SiBCN ceramic-based composite materials have poor contact surface bonding and limited improvement in high-temperature ablation resistance. Method: 1. Prepare cracked carbon coated chopped carbon fibers; 2. Prepare SiBCN amorphous ceramic powder; 3. Mix raw materials; 4. Sinter. The present invention is used for the preparation of high-temperature ablation-resistant chopped carbon fiber reinforced SiBCN‑MAS composite materials.

The invention discloses a method for preparing TiAl alloy powder through molten salt assisted metal thermal reduction. The method comprises the steps that anhydrous AlCl3 powder and KCl powder are prepared into AlCl3amp; and then mixing a reducing agent and TiO2, and carrying out magnesiothermic reduction reaction at high temperature to prepare the TiAl alloy powder. The preparation method comprises the following steps: preparing AlCl3amp; the TiAl alloy is prepared through magnesium thermal reduction assisted by KCl molten salt, and AlCl3amp is used; according to the preparation method, TiO2 is taken as a raw material, KCl molten salt is taken as a reaction medium, the mass transfer efficiency of TiO2 in the low-temperature reduction process is improved, reduction of TiO2 and combination of TiAl alloy are completed, the process of preparing the TiAl alloy from TiO2 reduction through a one-step method is achieved, the preparation method of the TiAl intermediate alloy powder is low in energy consumption, short in process and mature in technology, and the problems that an existing TiAl alloy powder preparation process is complex and high in energy consumption are solved.

The invention discloses a method for copolymerizing and synthesizing a triazinyl carbon nitride photocatalyst, which is characterized in that a triazinyl carbon nitride polymer is designed and synthesized by using a nitrogen-rich comonomer and a nitrogen-deficient comonomer, and accurate control of structural defects in the triazinyl carbon nitride polymer can be realized by adjusting the stoichiometric ratio of the comonomers in the process. Efficient separation and migration of photon-generated carriers in the triazinyl carbon nitride polymer are promoted, and the utilization efficiency of the photon-generated carriers is improved, so that the reaction efficiency of hydrogen production through water decomposition is improved. The copolymerization synthesis method of the triazinyl carbon nitride photocatalyst, provided by the invention, is simple to operate, mild in reaction condition and high in accuracy, and has a potential industrial application prospect.

The invention discloses high-density Sn < 2 + >-doped silicon-boron-gadolinium scintillation glass as well as a preparation method and application thereof, and belongs to the field of scintillation luminescent materials. The high-density Sn < 2 + > doped silicon-boron-gadolinium scintillation glass comprises a main body component, a reducing agent and externally doped Sn < 2 + >, the main body components comprise SiO2, B2O3, Gd2O3, GdF3 and X, and the X is one or more of Al2O3, AlF3, BaO and BaF2; the molar percentages of SiO2, B2O3, Gd2O3, GdF3 and X are as follows: the molar percentage of SiO2 is 5 to 10 mol percent, the molar percentage of B2O3 is 15 to 30 mol percent, the molar percentage of Gd2O3 is 25 to 35 mol percent, the molar percentage of GdF3 is 25 to 35 mol percent, and the molar percentage of X is 5 to 15 mol percent; the sum of the main components is 100 mol%; the molar percentage of the reducing agent is 0.5-2 mol%; the molar percentage of the externally doped Sn < 2 + > is 0.5-2 mol%; the density of the high-density Sn < 2 + > doped silicon-boron-gadolinium scintillation glass is 6-6.26 g / cm < 3 >, the photoluminescence quantum efficiency is 75%-90%, the density, the photoluminescence quantum efficiency and the X-ray imaging resolution of the scintillation glass are greatly improved, and the preparation cost of the high-density scintillation glass is reduced.

The invention relates to the technical field of welding, in particular to high-corrosion-resistance and high-strength welding flux and a preparation method thereof.The welding flux comprises brazing filler metal and brazing flux, and the brazing filler metal comprises 40-55 parts of aluminum, 12-16 parts of aluminum-silicon alloy, 27-33 parts of copper, 0.5-5 parts of germanium, 0.6-1 part of manganese, 0.2-0.6 part of titanium, 2-5 parts of tin and 0.1-0.5 part of rare earth elements; the brazing flux comprises 25 to 50 parts of potassium chloride, 10 to 35 parts of sodium chloride, 4.0 to 30.0 parts of lithium chloride, 10 to 20 parts of a potassium fluoride-aluminum fluoride compound, 0.5 to 6 parts of zinc chloride, 2 to 6 parts of zinc fluoride, 0.05 to 3 parts of sodium fluoride, 0.05 to 3 parts of lithium fluoride, 0.05 to 2 parts of potassium hexafluorosilicate and 0.05 to 1.5 parts of potassium bifluoride. According to the welding flux, through mutual cooperation of the brazing filler metal and the brazing flux, the strength, corrosion resistance and stability of a welded joint are jointly improved.

The invention discloses a red-mud-based oxygen carrier and a preparation method and application thereof. The red mud-based oxygen carrier comprises the following raw materials: red mud powder and high-calcium additive powder, and the weight ratio of the red mud powder to the high-calcium additive powder is (3-4): (1-2). The preparation method of the red mud-based oxygen carrier comprises the following steps: 1) pretreating raw materials; (2) preparing a red mud-based oxygen carrier precursor; 3) granulation and high-temperature heat treatment; and 4) processing and obtaining of a red mud-based oxygen carrier finished product, the red mud-based oxygen carrier has the advantages of low cost, realization of waste reutilization, high fluidization wear resistance, reasonable preparation energy consumption and up-to-standard circulating oxygen carrying capability, and the red mud-based oxygen carrier has a wide industrial application market in the application scene of fluidization chemical looping combustion due to the advantages.

The invention discloses a glass paste for a platinum film thermistor and a preparation method thereof, the glass paste mainly comprises the following components by weight: 50%-75% of a lead-free glass material, 0%-5% of an inorganic additive, and the balance of an organic additive; the lead-free glass material is a SiO2-B2O3-Bi2O3-CaO-Al2O3 system, and is mainly prepared from the following components in percentage by weight: 28.05 percent to 28.45 percent of silicon oxide, 30.31 percent to 30.75 percent of boron oxide, 8.67 percent to 8.80 percent of aluminum oxide, 7.07 percent to 11.52 percent of bismuth oxide, 0 to 3.33 percent of lithium oxide, 9.08 percent to 12.85 percent of zinc oxide, 6.68 percent to 6.77 percent of calcium oxide, 1.85 percent to 1.88 percent of titanium dioxide and 0.1 percent to 0.3 percent of cobalt oxide. The problems that in the prior art, thermal expansion is not matched with a substrate, the sintering temperature range is narrow, and the packaging strength is low are solved, after packaging, glass is free of bubbles inside, high in density and high in bonding strength with the substrate, the tension value is larger than 13 N, and the requirement for long-term use safety of the platinum resistor film temperature sensor can be met.

The present invention relates to the field of protective slag technology, and in particular to a protective slag and a granulating device thereof for solving the slag inclusion problem of 310 steel grades. The protective slag is a hollow spherical particle with a particle size of 0.2mm-0.5mm. The raw materials of the protective slag include 6%-10% soda ash, 7%-11% fluorite, 6%-10% bauxite, 5%-12% B2O3, 3%-5% MnO, 2%-4% carbon black, 1%-3% MgO, and the rest are magnesium slag, heavy calcium powder, and wollastonite. The slag basicity is 1.2-1.5 in terms of CaO / SiO2, and the viscosity is 0.12-0.15 Pa·s at 1300°C. The particle size of carbon black is 500 nanometers-5 microns, and the particle size of other raw materials is 45 microns-55 microns. The carbon black is coated on the outside of other raw materials and evenly distributed in each hollow spherical particle. The protective slag is used for 310 steel grades to reduce the occurrence of slag inclusion problems.

The application belongs to the field of engineering plastics, and particularly relates to long-chain polyamide resin with easy processing and high tensile property, and a preparation method and application thereof. The long-chain polyamide resin comprises the following raw material components: component a: aliphatic carboxylic acid compound component; component b: polyamine compound component; and component c: a compound with a structure shown in the following formula (1), wherein n and m can be any number between 1 and 10. The long-chain polyamide resin of the application introduces structural diacid with an asymmetric benzene ring structure, utilizes the asymmetric structure to reduce the crystallinity of the material, and introduces the benzene ring structure to improve the mechanical property of the polyamide material, so that the low processing temperature is realized from the polyamide material component itself, the energy consumption is reduced, and the mechanical property of the polyamide material is ensured. The problem that the processing temperature and mechanical property of the polyamide material and the processing energy consumption are difficult to be considered in the prior art is solved.

The invention discloses a preparation method of a large-deformation auxiliary high-homogeneity aluminum-silicon intermediate alloy. The method comprises the following steps: 1, mixing aluminum powder and silicon powder to obtain aluminum-silicon mixed powder; 2, performing cold isostatic pressing on the aluminum-silicon mixed powder; 3, vacuum sintering; 4, removing oxide skin on the surface; 5, carrying out plastic deformation at ultralow temperature after sheathing; and sixthly, homogenizing treatment is conducted, and the high-homogeneity aluminum-silicon intermediate alloy is obtained. According to the method, the powder metallurgy method is combined with ultralow-temperature extrusion severe plastic deformation, intermediate alloy densification and primary silicon crushing and homogenization are achieved under three-way pressure stress, the aluminum-silicon intermediate alloy high in density, refined in grain and high in homogeneity is obtained, and the aluminum-silicon intermediate alloy has the advantages of being high in purity and homogeneity, low in impurity element content and good in mechanical property. The method is suitable for adding materials in the preparation process of aluminum-silicon alloy and titanium alloy.

The present invention provides a flux for silicon carbide crystal growth, a cubic silicon carbide crystal and a growth method thereof, belonging to the technical field of crystal growth, wherein the flux is an alloy comprising a rare earth metal, a transition metal and carbon: the molar ratio of the rare earth metal to the transition metal is 1:9 to 9:1. The flux provided by the present invention can reduce the growth temperature of silicon carbide crystals, realize the growth of silicon carbide crystals at a lower temperature, and at the same time can increase the solubility of carbon in silicon melt, increase the concentration of carbon in silicon melt in the early stage of crystal growth, and realize obtaining high-quality and large-sized silicon carbide crystals in a shorter time.

The invention discloses a direct alloying method for converter steelmaking of manganese-rich slag, which comprises the following steps: S1, adding primary slagging materials to carry out primary slagging blowing, the primary slagging materials comprise lime, dolomite and return scrap of which the addition amounts are respectively 15-19kg / t steel, 8-12kg / t steel and 18-22kg / t steel, S2, blowing until the phosphorus content in molten steel is within 0.06%, and pouring slag; s3, after deslagging, a secondary slagging material and the manganese-rich slag self-reduction briquette are added for secondary slagging blowing and manganese alloying, the secondary slagging material comprises 3.3-4.1 kg / t steel, 2.0-3.0 kg / t steel of lime and 3.0-3.0 kg / t steel of light-burned dolomite, and the mass of the manganese-rich slag self-reduction briquette is 6.0-8.0 kg / t steel; s4, blowing until the final molten steel temperature is 1580-1680 DEG C; and tapping. A double-slag smelting process is adopted, manganese-rich slag self-reduction briquettes are put into a converter in the secondary slag making process, on the basis of converter smelting dephosphorization, manganese alloying is directly conducted on molten steel through the manganese-rich slag, and the reduction rate of the manganese-rich slag and the yield of manganese are further increased.

Provided is a nickel brazing filler metal which is capable of brazing and joining various stainless steel members at relatively low temperature, and has excellent corrosion resistance, and is used for brazing of a heat exchanger and the like. The nickel brazing filler metal is characterized by having a melting temperature of 1000°C or less, exhibiting excellent Wettability, having corrosion resistance against acid, and containing 8.0 to 19.0 mass% of Cr, 7.0 to 10.5 mass% of P, 0.1 to 1.5 mass% of B, and 2.0 to 8.0 mass% of Cu, wherein a content of Mo is 10.0 mass% or less, a content of Si is 2.5 mass% or less, and the remainders are is Ni and unavoidable impurities. In addition, the nickel brazing filler metal may contain one or more elements selected from the group consisting of Co, Fe and Mn, where the content of Co is 5.0 mass% or less, the content of Fe is 3.0 mass% or less, the content of Mn is 3.0 mass% or less, and the total content of these elements is 8.0 mass% or less.

The invention discloses a method for treating radioactive waste through plasma, and belongs to the technical field of nuclear waste treatment. The method comprises the following steps: taking glass fibers, boron-containing concentrated solution evaporated salt and a glass additive as raw materials, and adjusting the chemical composition of the raw materials to obtain an adjusted waste material containing boron oxide, calcium oxide, aluminum oxide, sodium oxide and silicon dioxide; and carrying out plasma melting and curing treatment on the waste material subjected to chemical composition adjustment. According to the method for treating the radioactive waste through the plasma, the plasma high-temperature melting technology is adopted, the glass fiber, the boron-containing concentrated solution evaporation-dried salt and the glass additive serve as raw materials, and the chemical composition of the raw materials is adjusted, so that the melting temperature of the plasma high-temperature melting technology is reduced, the temperature of glass melt is reduced, and discharging is convenient; and the treatment of the glass fiber and the boron-containing concentrated solution can be realized, so that the volume of the glass fiber and the boron-containing concentrated solution can be reduced to the maximum extent, the addition of glass raw materials can be reduced, and the recycling and minimum treatment of radioactive wastes can be realized.

The present invention provides a low-melting-point alloy filling and straightening method, comprising the following steps: S10, preparation step: filling the low-melting-point alloy into a molten pool and heating it to a molten state; S20, pre-treatment step: passing the lead screw to be straightened through a feed port, a molten pool, and a discharge port in sequence, and a cooling device is provided at the discharge port to cool the low-melting-point alloy attached to the lead screw to be straightened, so that the lead screw to be straightened is in a smooth state; S30, straightening step: the lead screw to be straightened enters the straightening device through the discharge port to straighten the lead screw to be straightened. By inserting the lead screw into a molten pool filled with liquid low-melting-point alloy, the low-melting-point alloy solidifies into the lead screw spiral groove, the lead screw becomes a smooth rod, and then the straightening method of the smooth rod is used to straighten the lead screw. This straightening method is simpler, easier to operate and more effective than the existing method, and will not cause any damage to the lead screw spiral groove.

The invention discloses a low-temperature sintering silver paste and a preparation method and application thereof. The raw materials of the low-temperature sintering silver paste include, by weight percentage, 25-35% of spherical silver powder, 20-30% of flaky silver powder, 20-25% of nano silver powder and 6-10% of high molecular polymer. The high molecular polymer is a bisphenol A epoxy resin containing a strong polar group. The polar group can attract silver ions to migrate to the surface of the silver powder to improve the reaction activity of silver, and the covalent bonds formed with the silver powder reduce holes, thereby improving the shear strength of the silver paste and reducing the sintering temperature, so that the silver paste has excellent adhesion and conductive properties.

The application discloses a white light emitting phosphate glass material based on divalent tin ions and a preparation method thereof, and belongs to the technical field of luminescent glass. The white light emitting phosphate glass material based on divalent tin ions is prepared from raw materials including 2.5-25% of SnO, 15-37.5% of ZnO, 20% of ZnCl2 and 40% of P2O5 in terms of mole percentage; and a reducing agent Si3N4 can be further added when the white light emitting phosphate glass material is prepared. The phosphate glass prepared in air can promote the luminescence of Sn 2+ ; meanwhile, the introduction of the reducing agent can effectively control the valence state of Sn ions, and the phosphate glass has excellent comprehensive performance, a low glass transition temperature, good mechanical performance and thermal stability, and is suitable for white light LED lighting and display devices.