28results 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 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 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.

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 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 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 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 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 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.

The invention discloses a preparation method of lead-free metallic luster glaze, which is characterized in that a formula system is constructed by introducing lead-free raw materials such as calcium borate frits and recycling steel slag, and coloring ions (Co < 2 + >, Fe < 3 + >, Mn < 2 + > and the like) are promoted to be uniformly distributed in a network structure, so that a glaze layer is endowed with the characteristics of environmental protection, high glossiness and stable color. The production cost is effectively reduced, the remarkable problems of the traditional lead-containing glaze in the aspects of environmental protection and safety are effectively solved, and the lead-containing glaze can be widely applied to the fields of art, daily use and architectural ceramics.

The invention discloses a method for reducing chromium content in metal chromium smelting slag, and relates to a method for reducing chromium content in smelting slag, which comprises the following steps: uniformly mixing chrome green, aluminum powder, sodium chlorate, fluorite and a flux machine for 30 minutes, putting into a cast iron furnace shell, paving a bottom with magnesite bricks in the furnace shell, making a sand nest with fine magnesite, and after the mixture is put, projecting the middle of the top charge surface, and then making the top of the middle convex part into a nest shape, putting a thin or thin magnesium rod and sodium chlorate into the nest, igniting the thin or thin magnesium rod, carrying out ignition reaction, cooling for 24 hours after the reaction is finished, lifting a furnace shell, separating slag from chromium, sampling and analyzing slag components. The fluorite and the flux H are added, technological conditions are changed, the melting point of the system is reduced, the viscosity of the system is reduced, the reduction reaction time is prolonged, the metal chromium settling time is prolonged, finally, the chromium content of the smelting slag is reduced, and the utilization rate of chromium resources is increased.

The invention relates to a composite spinel refractory material and a preparation process thereof, which are characterized in that chromic oxide sand, industrial alumina, magnesia, high titanium slag and zinc oxide powder are adopted as raw materials, and the refractory material is prepared through the procedures of batching, melting in an oxidizing atmosphere, casting, annealing, cold working and the like. The prepared fused and cast composite spinel refractory material has the advantages of being high in density, low in porosity, good in erosion resistance and thermal shock resistance and the like, can be used for seriously eroded parts of kilns such as an oxygen-fuel combustion glass kiln and a copper smelting industrial furnace, and effectively prolongs the service life of the kilns.

The application relates to the technical field of glass bead manufacturing, in particular to high-refraction wear-resistant glass beads and a preparation method thereof. The preparation method of the high-refraction wear-resistant glass beads comprises the following steps: S1, raw material pretreatment and dry mixing; S2, raw material mixing: the powder and a modifier are put into a mixing machine, dry mixing is carried out for 15-20 minutes to obtain dry mixed material, the dry mixed material is smelted at 1480-1520 DEG C for 2-4 hours under stirring, the temperature is increased to 1520-1550 DEG C after smelting, and the smelted material is clarified and homogenized for 2-3 hours under standing and heat preservation until no obvious bubbles are generated, a smelted liquid is obtained, gear jet spinning forming is adopted to form beads, and the beads are shaped in a shaping area to obtain microbeads; and S3, post-treatment. The application provides high-refraction wear-resistant glass beads and a preparation method thereof, so as to solve the problems of insufficient refractive index and poor wear resistance of glass beads in the prior art.

The present application relates to the technical field of glass production, and provides a mixing method for improving the temperature of glass production mixture, which is applied to a mixer with a stirring cavity and comprises the following steps: S1, starting the mixer to sequentially perform dry mixing and wet mixing on glass raw materials; S2, when entering the wet mixing stage, a steam supply unit is opened, so that high-temperature steam starts to be introduced into the stirring cavity of the mixer; and during the whole duration of the wet mixing stage, the steam supply unit is kept in an opened state; S3, when the wet mixing stage reaches a preset duration of the system, the steam supply unit is closed, and the introduction of high-temperature steam is stopped; and when the wet mixing stage ends, the temperature of the material is improved from an initial value to not less than a preset target temperature, thereby effectively solving the problem that the mixing temperature is substandard in a low-temperature environment. The present application also provides a mixing system for realizing the method, which can significantly improve the mixing uniformity and reaction activity, and has the advantages of precise temperature control, energy saving and high efficiency.

The present invention provides a low melting point alloy filling and straightening device, comprising: a molten pool, the molten pool comprising a heating element, a feed port and a discharge port, and a cooling device is arranged at one end of the molten pool close to the discharge port; a straightening device, the straightening device comprising at least one pair of straightening rollers, the discharge port being connected to the straightening rollers; a base, the molten pool and the straightening device being arranged on the base. The present invention utilizes the liquid-to-solid transformation of the low melting point alloy to fill the spiral groove of the lead screw, so that the lead screw becomes a smooth rod, and then straightens it. The whole device has a simple structure and is easy to operate. When the straightening lead screw is inserted into the feed port, the preparation, straightening and cleaning processes can be completed under the action of the driving device.

The invention provides a conductive slurry composition and application thereof, and relates to the technical field of conductive slurry. The conductive paste composition comprises the following raw material components in percentage by weight: 50-85% of conductive powder, 1-6% of epoxy resin, 10-15% of polyimide resin, 1-5% of a solvent, 1-5% of glass powder, 1-10% of bicarbonate and 0.5-3% of a rheological additive. The conductive paste composition can avoid particle sedimentation in the heating process, and the uniformity of a conductive circuit is improved.

The invention discloses a yellow phosphorus production method based on a multi-element system additive and process control. The yellow phosphorus production method comprises the following steps: S100, preparing raw materials; s200, a raw material pretreatment procedure; s300, burdening and mixing: mechanically mixing the core raw material with the multi-element system additive; s400, an electric furnace smelting procedure: feeding the furnace charge into an electric furnace, and carrying out carbon thermal reduction reaction to generate yellow phosphorus-containing steam; s500, a condensation and collection process: changing the yellow phosphorus vapor into a liquid state through a condensation system, and collecting the yellow phosphorus vapor; wherein the multi-element system additive comprises a fluxing agent, a reaction accelerant and a structure regulator; the method further comprises a process control step, wherein the adding amount of the multi-element system additive is controlled and adjusted through closed-loop feedback based on monitoring data. According to the method, by introducing a multi-element system additive and optimizing process control, the production energy consumption is reduced to a certain extent and the furnace condition stability is improved while the phosphorus reduction rate is increased and the residual phosphorus in the slag is reduced.

The invention relates to low-temperature fired white Yellow River sediment microcrystalline glass and a preparation method thereof. The low-temperature fired white Yellow River sediment microcrystalline glass comprises the following raw materials: 50-65% of Yellow River sediment, 15-25% of CaCO3, 5-10% of dolomite, 3-10% of silica sand, 1-5% of Na2SiF6, 1-5% of K2CO3, 1-5% of chromite and 1-5% of TiO2. B2O3-CuO accounting for 1%-4% of the total weight of the raw materials is added. The preparation method comprises the following steps: (1) melting raw materials to obtain basic molten glass; (2) molding the molten glass to obtain a glass plate; and (3) coring and crystallizing the glass plate, and then carrying out post-treatment. The microcrystalline glass is prepared by firing the Yellow River silt at low temperature, a new way is provided for high-value utilization of Yellow River silt resources, and the product is high in quality and low in cost and has a wide application prospect.

The present invention provides a device and method for liquid phase growth of silicon carbide crystals, belonging to the field of crystal growth technology, the device includes a crucible assembly, a seed crystal rod assembly, a heating assembly located outside the crucible assembly, and a heat preservation assembly wrapping the crucible assembly, the seed crystal rod assembly and the heating assembly; the crucible assembly includes a first crucible and a second crucible arranged in sequence from outside to inside; the first crucible is provided with a detachable crucible cover, and the crucible cover is provided with a fixing component for fixing the seed crystal rod assembly; the inner bottom surface of the first crucible is provided with a boss; the outer bottom of the second crucible is provided with a groove matching the shape of the boss, and the middle of the groove is provided with a pushing assembly for pushing, pulling and rotating the second crucible; the pushing assembly passes through the bottom of the first crucible, the heating assembly and the heat preservation assembly in sequence. The device provided by the present invention can ensure the temperature stability of the silicon carbide crystal growth process, while avoiding the problem of excessive jitter during the seed crystal pulling and rotation process.

The invention discloses multicolor luminous zinc-based halide organic-inorganic hybrid glass and a preparation method thereof. The matrix component of the halide glass is A2Zn1-xBr4, A represents a triphenylphosphonium organic molecule, active ions are one or two of xMn < 2 + > or xSb < 3 + >, x is greater than or equal to 0.3 and less than or equal to 0.9, and the glass is transparent light yellow under natural light. The single-doped Mn < 2 + > and Sb < 3 + > halides respectively emit broadband green light and red light to a near-infrared region under the irradiation of ultraviolet light, and the co-doped glass can emit characteristic light of two ions. The preparation method is as follows: triphenylphosphonium bromide and metal bromide are used as raw materials, CH2Cl2 is used as a solvent, Et2O is used as an anti-solvent, and the transparent crystal is synthesized through a diffusion method. And heating the crystal in air to a molten state, carrying out the whole process in the air, and slowly cooling to room temperature to obtain the multicolor luminous halide glass which can be used for X-ray imaging and near-infrared LEDs (Light Emitting Diodes).

The invention discloses a cooling structure of a PVC particle extruder. The plastic extruder comprises a shell, a connecting piece is arranged on one side of the shell, an extruder body is arranged at the top of the shell and the top of the connecting piece, a fixing structure is arranged on the outer surface, close to a discharging position, of the extruder body, and a sliding plate is arranged at the bottom end in the connecting piece in a sliding mode; an electric heating plate, a condenser pipe and a temperature sensor are arranged on the outer surface of the extruder body; and the mouth mold conversion structure is arranged in the connecting piece through a sliding plate, a plurality of cutting pieces are arranged in the mouth mold conversion structure, and mouth molds of multiple sizes are arranged through the cutting pieces. According to the extrusion machine, the mouth die conversion structure is arranged, when mouth dies of different sizes are replaced, a user can drive the mouth die conversion structure to slide in the connecting piece through the first servo motor, then the mouth die conversion structure is driven to rotate through the second servo motor, and therefore the mouth die for the extrusion machine is changed, and the mouth die is convenient to disassemble and assemble.

The invention provides a superfine dispersion aluminum-molybdenum intermediate alloy for an aluminum alloy and a preparation method of the superfine dispersion aluminum-molybdenum intermediate alloy. The aluminum-molybdenum intermediate alloy provided by the invention comprises the following components in percentage by mass: 4.5-5.5% of Mo, less than or equal to 0.10% of Si, less than or equal to 0.20% of Fe and the balance of Al, the second phase particle size of the microscopic structure is less than 50 microns, and is reduced by more than 60% compared with that of a product prepared by a conventional doping method; according to the test of an AA TP-2 method, the sufficient dissolving time of the aluminum-molybdenum intermediate alloy is within 10 minutes, and the dissolving speed of the aluminum-molybdenum intermediate alloy is increased by more than 50% compared with that of a conventional doping method. The superfine dispersion aluminum-molybdenum intermediate alloy provided by the invention is prepared by adopting a gradient component control method; compared with a traditional molybdenum and aluminum opposite doping method, the obtained aluminum-molybdenum intermediate alloy is remarkably improved in structure and high in dissolution rate; and the quality defects of composition segregation, coarse structure and the like caused by insufficient dissolution of the second phase after the molybdenum element is added are avoided.

The invention discloses NAS microcrystalline glass powder and a preparation method thereof, and relates to the technical field of microcrystalline glass. The preparation method comprises the following steps: providing sol, wherein the sol is prepared from the following components in parts by mass: 12 to 15 parts of aluminum silicate, 7 to 9 parts of NaOH, 60 to 70 parts of water, 1.0 to 5.8 parts of nano gas-phase SiO2 and 1 to 1.3 parts of TiO2; and drying the sol, heating the obtained dry gel to 750-850 DEG C at a heating rate of 3-5 DEG C / min, carrying out heat preservation for 0.5-1 h, cooling to room temperature, and carrying out crushing and ball milling on the obtained NAS glass ceramic block to obtain the NAS glass ceramic powder. The sol-gel combined one-time low-temperature sintering and recrystallization process is adopted, the energy consumption is low, the steps are simple, and the prepared NAS microcrystalline glass is uniform in component, high in density, crystallinity and mechanical strength and low in thermal expansion coefficient and dielectric loss.

The invention discloses a high-compaction long-cycle lithium manganese iron phosphate material as well as a preparation method and application thereof. According to the preparation method, firstly, ferromanganese phosphate is prepared through an oxidation-reduction reaction, then the ferromanganese phosphate reacts with a lithium source and other raw materials to prepare the lithium ferromanganese phosphate, and when the lithium ferromanganese phosphate is prepared, specific types of oxides and fluorides are added as fluxing agents to prepare the lithium ferromanganese phosphate. The oxide is selected from one or a combination of more of magnesium oxide, titanium oxide, aluminum oxide, zirconium oxide and boron oxide; the fluoride is selected from one or two of lithium fluoride and magnesium fluoride. The fluxing agent can effectively increase the primary particle size of a lithium iron manganese phosphate product during a material sintering reaction, reduce the porosity of a positive electrode material, improve the compaction density of the positive electrode material, and improve the electrical performance and cycle performance of lithium iron phosphate at the same time.

The application discloses a kind of titanium alloy hydrogen content detection's anti-hydrogen absorption sample preparation and detection method, belong to metallurgical material detection technical field.The application includes: titanium alloy sample is processed into block, after ultrasonic cleaning in acetone is dried in humidity ≤24% environment, and in 4 hours detection or vacuum sealing preservation;Select tin sheet as dissolvent, tin sheet and sample mass ratio is 1:2;Graphite crucible is carried out empty burning pretreatment;Inert gas melting thermal conductivity method detection parameter is set as analysis power 2.7KW, degassing power 4.5KW, analysis time 120 seconds, cooling water temperature ≤28 ℃;Tin sheet is placed in the bottom of crucible, after adding sample, detection is carried out.The application is through anti-hydrogen absorption combined process, tin sheet high-efficiency fluxing and crucible empty burning pretreatment, effectively suppresses titanium alloy hydrogen absorption, realizes sample complete melting, eliminates crucible residual interference, the relative standard deviation of detection result is ≤3%, significantly improves detection accuracy and repeatability, applicable to the precision quality control of hydrogen content in titanium alloy and special steel.

The application provides a composite charge for an electric smelting furnace and application of the composite charge in low-conductivity refractory oxide bath formation and reduction, which is designed based on eutectic principle and phase diagram theory and comprises a refractory oxide base, a fluxing agent and a conductive agent. The fluxing agent significantly reduces the complete melting temperature by weakening the strong lattice bonding and forming a eutectic liquid phase; the conductive agent improves the solid-state conductivity at the initial heating stage to start the Joule heat and enhances the ion migration ability after melting. The two agents cooperate to solve the technical problems of slow melting, high energy consumption and unstable bath formation of the refractory oxide caused by poor conductivity, and realize the low-current and rapid formation of a continuous conductive bath. The application also provides a bath formation and reduction method, and the complete melting temperature is adjustable between 2000-2700 DEG C. The application is suitable for electric arc furnaces, plasma furnaces and other electric smelting furnaces.

This invention relates to the field of architectural ceramics technology, disclosing a titanium sphene crystal frit, its preparation method, and its application. The raw materials include kaolin, titanium dioxide, quartz, potassium feldspar, calcite, and wollastonite. By pre-firing the titanium sphene crystal frit using this formula, the titanium sphene crystals are pre-dissolved in the glass phase. During the subsequent glaze firing process at 1200℃, the titanium sphene crystals melt again and precipitate a second time, resulting in an opaque glaze layer. This secondary crystallization enhances the chemical stability of the titanium sphene crystal frit during subsequent glaze firing, leading to a more stable increase in the solar reflectance of the fired glaze. This solves the problem of unstable reflectivity in glazes when directly using titanium sphene powder or combining it with titanium dioxide and titanium frit to directly form titanium sphene crystals during glaze firing.