41results about How to "Lower eutectic point" patented technology

An electrolyte for a high-power start-stop battery comprises the following components, per 100 parts by weight, 14 to 20 parts of lithium salt, 70 to 85 parts of organic solvent, and 1 to 10 parts offunctional additives. The organic solvent comprises the following components, by weight accounting for the total weight of the electrolyte: 12 to 20 parts of ethylene carbonate EC, 5 to 11 parts of propylene carbonate PC, 10 to 20 parts of ethyl methyl carbonate EMC, 14 to 22 parts of propyl acetate PA, and 12 to 20 parts of propyl propionate PP. The lithium ion battery electrolyte of the invention can be reduced in electrical conductivity under a low-temperature condition, and improved in the low-temperature interface membrane impedance so as to be improved in the charging and discharging power characteristic at low temperature, further improves the high-temperature stability of the lithium salt and the interface membrane, is reduced in high-temperature side reaction, and improves the high-temperature storage and high-temperature cycle performance of the battery.

The invention discloses a medium-temperature color glaze formula and a sintering process thereof, wherein the parent glaze of the formula contains the following raw materials by weight percent: 35-45% of potassium-sodium integrated feldspar, 6-8% of kaolin, 13-18% of quartz, 10-15% of limestone, 0-8% of talcum, 0-6% of zinc oxide and 0-6% of barium carbonate. The formula is characterized in that the potassium-sodium integrated feldspar is selected in stead of potassium feldspar or solidum feldspar in combination with the local material reality, so that the production cost and sintering temperature are reduced, and simultaneously, the eutectic point of potassium and sodium is low, the melting range is wide, the solution viscosity is reduced slowly as the temperature rises, and the shrinkage of the glaze can be reduced; meanwhile, the mechanical properties, melting performance and thermal stability of the glaze layer are improved, and the dilatation coefficient of the glaze can be reduced to prevent crazing; and in addition, the elasticity of the glaze is improved, the glossiness of the glaze layer is improved, the surface tension of the glaze is reduced and the generation of the intermediate layer is promoted.

The invention discloses a preparation method of a radiation-proof cement clinker mineral phase system, which comprises the following steps of: (1) raw material preparation: raw materials are uniformly mixed according to a ratio, and are ground until the amount of residues on a 180-mesh square hole sieve is less than or equal to 10%; and (2) high temperature sintering: the ground powder in the step 1 is pressed into cylindrical test pieces, and the cylindrical test pieces are placed in a corundum crucible and are calcinated for 1 to 3 hours at a high temperature in a reheating test furnace to obtain the desired mineral phase system. The raw materials are calcium carbonate, alumina, and boron oxide, or calcium carbonate, alumina, boron oxide, and iron oxide. Through the mineral phase systemprepared by the preparation method disclosed by the invention, neutrons can be absorbed, the heat consumption of a cement clinker preparation process is reduced, the normal setting and hardening of cement are promoted, the strength of cement is improved, the mass concrete cracks can be inhibited, and the durability of concrete is improved. The method provided by the invention is simple in process, is easy to control and adapts to large-scale industrial production.

The invention relates to a method for preparing high-heat-conductivity silicon nitride ceramic through normal pressure sintering. The method includes the steps that with the total material mass being100%, 95-70% of silicon nitride powder and 5-30% of sintering aids are evenly mixed to obtain ceramic mixed powder, and the sintering aids are a mixture with TiO2 as a main sintering aid and at leastone of Y2O3, Sc2O3, Sm2O3, Lu2O3, Er2O3, MgO, Mg2Si and MgSiN2 as an auxiliary sintering aid; the obtained ceramic mixed powder is molded to obtain a ceramic biscuit; the obtained ceramic biscuit is subjected to normal pressure sintering under 1600-1800 DEG C, so that dense silicon nitride ceramic is obtained. The method can be used for obtaining the dense silicon nitride ceramic with a certain heat conductivity level and excellent mechanical properties.

The invention discloses a preparation method of jade cracked ice glazed porcelain. The preparation method comprises the steps of preparing a biscuit of the porcelain, applying glaze of 0.8-2mm to the surface of the biscuit to make a green body, and firing the green body to prepare the porcelain. The following raw materials of the glaze are added according to parts by weight: 70-80 parts of anorthite, 15-20 parts of barium carbonate, 0-0.5 part of zinc oxide, 0-0.5 part of zirconium oxide, 5-10 parts of wollastonite, 10-15 parts of boron oxide, 20-30 parts of neodymium oxide, 0-1 part of white mica and 5-10 parts of titanium stones. In the preparation method, the expansion coefficient of a glaze layer is greater than the coefficient of thermal expansion of the biscuit and in the firing process, as the expansion coefficients are different, the tensile stress of the porcelain occurs, the glaze splits and cracks are formed; meanwhile, the glaze layer can generate silicate neodymium crystals, so that small crystal patterns show up in the ice cracks, and therefore, the ornamental value is improved.

The invention discloses a novel energy-saving consumption-reducing dry-process cement clinker. The cement clinker is prepared from a raw material through sintering, wherein the raw material is mainly composed of limestone, an argillaceous material and a ferruginous material. The cement clinker is characterized in that the silica modulus of the cement clinker is no more than 2.1, the aluminum-oxygen modulus of the cement clinker is no less than 1.2 and less than 1.4, and a saturation ratio is 0.86 to 0.96. The invention also discloses a preparation method for the cement clinker. The cement clinker enables coal consumption in preparation of the clinker to be effectively reduced and has performance equivalent to performance of conventional cement clinker.

The invention relates to the technical field of semiconductor glaze, and in particular relates to a high-voltage porcelain insulating semiconductor glaze. The semiconductor glaze is prepared from the following components in parts by weight: 25-35 parts of high-potassium and low-iron feldspar, 8-14 parts of mud, 4-10 parts of Dongsheng soil, 1-4 parts of calcined talc, 20-30 parts of quartz powder, 2-4 parts of barium carbonate, 12-18 parts of iron oxide red, 1-3 parts of chrome oxide green, 9-12 parts of titanium dioxide and 1-2 parts of spodumene. The semiconductor glaze is high in structure stability, fine in surface and glossy in surface, the eutectic point is reduced, and the melting efficiency is improved; and meanwhile, the combining capacity of the semiconductor glaze after being glazed is improved by adopting the Dongsheng soil and mud.

The invention relates to a preparation method of a ternary layered carbide Ti2SC (titanium sulfur carbide) material. Al (aluminum) is used as an assistant, and a high-temperature high-pressure synthesis method is used for preparing a compact Ti2SC material. Raw materials include Ti (titanium) powder, S (sulfur) powder, C (carbon) powder and Al powder, and the mol ratio of the four raw materials is as follows: Ti: S: C: Al=2: (1-1.4): 1: (0.1-0.2). The Ti2SC block material synthesized by the method is compact in structure, and the content of Ti2SC is more than 80 percent by weight; Al is used as the assistant, so that the melting point can be lowered; and by adopting the high-temperature high-pressure sintering method, the volatilization of the S powder can be maximally inhibited, and the Ti2SC material can be rapidly sintered and synthesized.

The present invention discloses process of preparing Portland cement with waste ceramic tile polishing material. Portland cement clinker in 77-84 wt%, setting retarder gypsum in 3-6 wt% and mixed material in 10-20 wt% are mixed and ball milled in a ball mill to form Portland cement of specific surface area 350 sq m/kg, where the mixed material comprising waste ceramic tile polishing material of 3-6 wt%, mineral slag of 4-8 wt% and flyash of 3-6 wt%. Using waste ceramic tile polishing material as partial material for Portland cement can dispose waste, save resource and raise production efficiency.

The invention discloses a low-dielectric wollastonite series low-temperature co-fired ceramic material and a preparation method thereof, and relates to the technical field of electronic materials. The formula of the ceramic material comprises the following components: CaxSiO3, awt% of SiO2, bwt% of R2O, cwt% of Bi2O3, dwt% of B2O3 and ewt% of MO, wherein x is more than or equal to 0.9 and less than or equal to 1.1, 0lt A < = 30, 1 < = b < = 5, 0lt; c < = 3, 0lt; d < = 6, 0 < = e < = 10; r2O is at least one of Li2O and K2O; and MO is one or more of ZnO, MgO, BaO, CoO, CuO, La2O3 and MnO2. The low-temperature co-fired ceramic material provided by the invention meets the requirements of low dielectric, low loss and low-temperature sintering, and can be applied to the fields of millimeter wave LTCC devices and the like.

The invention relates to a preparation method of a hierarchical-structure thin-wall BN microtube. The preparation method mainly comprises the following steps: putting a boron-containing precursor intoa tube furnace, introducing nitriding reaction gas, carrying out heating to 1000-1200 DEG C, and keeping the temperature for 2 hours or more to obtain a large batch of high-quality one-dimensional boron nitride hierarchical-structure materials. According to the method, a substrate is not needed; the preparation method is simple and effective in process and low in energy consumption and uses cheapand non-toxic raw materials; and the purity of a purified target product is high, which is favorable for batch production of the boron nitride micro-nano hierarchical structure materials.

The invention discloses a ladle filter sand, and belongs to the technical field of metallurgical assistants. The ladle filter sand developed in the invention comprises kyanite, bauxite, feldspar, micapowder, a charred rice husk material, Al8B4C7, magnesia and mirabilite. The raw materials are mixed, undergo ball-milling, and then are sieved to obtain the ladle filter sand. The charred risk husk material is obtained through the following steps: mixing rice husks with nano-iron powder, transferring the obtained mixture into a carbonizing furnace, performing heat insulation carbonization in an argon gas protection state for 2-4 h, continuously heating the carbonizing furnace, performing a high temperature reaction, performing furnace cooling to room temperature, pickling the obtained reaction product, and drying the pickled reaction product. The ladle filter sand obtained in the invention has the advantages of excellent automatic casting ratio and excellent resistance to high temperature.

The invention discloses a multi-component composite reinforced anti-cracking agent for improving the anti-cracking performance of concrete and a preparation method of the multi-component composite reinforced anti-cracking agent. The anti-cracking agent is prepared from the following raw materials in parts by weight: 55-80 parts of dolomite, 1-5 parts of phosphogypsum, 0-5 parts of phosphorus slag, 10-15 parts of fly ash, 0-25 parts of limestone, 0.5-1 part of a hydration slow-release agent and 0.5-1.5 parts of a mineralizing agent. The preparation method comprises the following steps: uniformly mixing the raw materials, calcining at 1150-1300 DEG C for 60-90 minutes, quenching and cooling to below 400 DEG C, and grinding until the 80 mu m screen residue is less than or equal to 10%, thereby obtaining the multi-component composite reinforced anti-cracking agent finished product. The use amount of the anti-cracking agent in the concrete is 5-8% of the use amount of the cementing material. The multi-component composite reinforced anti-cracking agent disclosed by the invention has the advantages of low hydration heat release, long expansion lasting time, high concrete later strength and the like, and can be widely applied to concrete structures with high cracking risks, such as mass concrete, thin-wall structures, super-long structures and the like.

The invention relates to an environment-friendly composite spheroidizing agent applied to thick and big ductile iron. The composite spheroidizing agent comprises, by weight, 78-90 parts of spheroidizing agents, 5-20 parts of melt-resisting agents, 1-5 parts of dreg removing agents, 2-8 parts of purifying agents, 1-6 parts of desulfurizing agents and 2-5 parts of nucleating agents. The spheroidizing agent has the advantages shown by rear earth and magnesium during spheroidizing, and overcomes the defects of the rear earth and the magnesium. The magnesium is a primary spheroidizing element according to its ratio in the composite spheroidizing agent, while the rare earth has a secondary assisted spheroidizing function. The composite spheroidizing agent has good effects in desulfurizing, deoxidizing, iron liquid purifying, interference element eliminating, eutectic point reducing and supercooling degree increasing, and has the following effects on the performance of the ductile iron: improving casting mobility, reducing temperature of iron liquid oxidation films, changing shrinkage characters of ductile iron, reducing shrinking and loosening, improving mechanical performance, refining graphite and improving abrasive resistance.

The invention relates to the field of lead-zinc smelting secondary lead metallurgy, in particular to a waste lead-acid storage battery and lead-containing waste regenerated reduced lead ingredient and a preparation method thereof. The waste lead-acid storage battery and lead-containing waste regenerated reduced lead ingredient comprises a first ingredient, a second ingredient, a third ingredient, a fourth ingredient, a fifth ingredient, a sixth ingredient and a seventh ingredient, wherein the first ingredient comprises scrap iron, the second ingredient comprises coal, the third ingredient comprises the first ingredient and the second ingredient, the fourth ingredient comprises the first ingredient and iron ore cinder, the fifth ingredient comprises scorched particles, the sixth ingredient comprises return slag, and the seventh ingredient comprises a main material. The preparation method comprises the following steps of A, preparing the materials; B, preparing equipment; C, adding the third ingredient, the fifth ingredient, the sixth ingredient and the seventh ingredient into a furnace and smelting; D, raking the liquid surface with a rake, and adding a fourth ingredient when dense smoke emerges from the rake, when it is observed that the liquid level in the furnace is bright and boiling does not occur, adding of the fourth ingredient is stopped; and E, carrying out furnace discharging. According to the scheme, the regeneration and reduction cost of the waste lead-acid storage battery and the lead-containing waste is reduced.

The invention discloses a method for extracting vanadium from vanadium titano-magnetite smelting slag through roasting and ultrasonic leaching, and relates to the technical field of metallurgy. The method for extracting the vanadium from the vanadium titano-magnetite smelting slag through roasting and ultrasonic leaching comprises the following steps that the vanadium titano-magnetite smelting slag is pretreated; an additive and an oxidizing agent are added into the pretreated vanadium titano-magnetite smelting slag, and roasting is conducted; sulfate is added into a roasted material, uniformly mixing is conducted, and the material is wet with water; and concentrated sulfuric acid is added, ultrasonic treatment is conducted for 1-2 h, solid-liquid separation is conducted, and leaching liquid and leaching residues are obtained. According to the method for extracting the vanadium from the vanadium titano-magnetite smelting slag through roasting and ultrasonic leaching, vanadium in the vanadium titano-magnetite smelting slag can be fully extracted through the pretreatment, roasting and ultrasonic extraction processes, the extraction rate is increased, the acid consumption is reduced, and the roasting temperature is reduced.

The invention relates to the technical field of titanium alloy processing, in particular to mixed alkali for removing titanium alloy surface oxides and a titanium alloy surface oxide removal method. The mixed alkali for removing the titanium alloy surface oxides comprises the following components in percentage by mass: 40-45% of NaOH, 50-55% of KOH and 5-10% of Na2CO3. According to the mixed alkali for removing the titanium alloy surface oxides, three common alkaline substances are used, so that the mixed alkali is cheap and easy to obtain, and the formula is simple. During use, eutectic melting is carried out at a lower temperature, the titanium alloy surface oxides can be completely removed, acid washing is not needed subsequently, any adverse effect on the titanium alloy is avoided, themixed alkali is suitable for the treatment of titanium alloy material cost and semi-finished products, and the quality stability of the titanium alloy product is improved.