49results about How to "Lower eutectic temperature" patented technology

The use of lithium bis(oxalate)borate (LiBOB) as an additive in a lithium secondary battery provides improved battery performance such as long life and high capacity retention after high temperature storage.

A molten salt composition is disclosed containing two or more types of molten salt MTFSI whose anion is an imide anion TFSI and whose cation is an alkali metal M exhibits a lower electrolyte melting point and a wider operating temperature range than a simple salt does. This brings about various advantages such as a wider range of materials that are chosen for use in batteries and the like.

A method of preparing transition metal and alloy thereof through low temperature molten salt electro-deposition is characterized by comprising the steps of (1) mixing anhydrous urea, acetamide and anhydrous LiX uniformly and heating and stirring the mixture to form a colorless uniform liquid molten salt; (2) dissolving a transition metal chloride TMCl2 in low temperature molten salt and stirring and mixing the mixture uniformly to form a low temperature molten salt electrolyte; (3) with a copper sheet or stainless steel as a cathode and graphite as an anode, performing electro-deposition in the low temperature molten salt electrolyte at the electrolyzing temperature of 70-90 DEG C in a manner of constant potential and constant current to control the potential or cathode current density; and (4) when the electrolysis is finished, taking the copper sheet or stainless steel out and cleaning and drying it to obtain the transition metal and alloy thereof deposited on the surface of the cathode. The molten salt is low in price and is low in eutectic temperature so that the method is low in cost, is low in electrolysis temperature, is energy-saving, is less in pollution and is slight in corrosion on equipment.

A method for producing a clinker for cement, comprising grinding a raw flour comprising, especially, Al2O3, Fe2O3 and SO3 in contents such that the formula for calculating SO3 content of=0.261×Al2O3−0.638×Fe2O3+k, where 2.5<k<3.5, then by sintering flour in an overn wherein the temperature is between 1250° C. and 1350° C. and oxygen content is between 2.5% and 10% by volume.

Deicing compositions are described for reducing an amount of ice formed on a surface. The deicing compositions may include about 1 wt. % to about 15 wt. % of a salt of citric acid. The compositions may further include about 23 wt. % to about 28 wt. % sodium chloride when the deicing composition forms an aqueous solution.

The invention discloses low zinc hot dipping aluminium alloy plating material containing Ca multi-combination metamorphism. The composition of alloy comprises, by element weight, 10%-13% of Zn, 5.0% of alloy enhancer Cu, 0.03 % of polarization metamorphic agent Ca, 0.2 % of solvent passivator Mo and 0.5% of rare earth addition, and the rest of the composition of the alloy are A1 and micro impurities which are unavoidable. The low zinc hot dipping aluminium alloy plating material containing the Ca multi-combination metamorphism solves the problems that due to dissolution of iron in a hot dipping plating process, zinc liquid viscosity is enabled to be increased and the capability of the surface of an infiltrating steel matrix is reduced, the thickness of a zinc layer is obviously increased due to the fact that iron content in zinc liquid is increased, and therefore ductility and the appearance of the a plating layer are enabled to be poor, and other problems are solved too. The aluminium alloy plating material for hot dipping is obtained, wherein the aluminium alloy plating material for hot dipping is good in matrix wettability, strong in binding force, high in strength, good in extensibility, high temperature-resistance, thin in plating layer, and strong in corrosion resistance.

The invention discloses a glazed ceramic tile and a preparation method thereof. The glazed ceramic tile is prepared by processing a blank material and glaze, and the blank material comprises the following compositions in percent by weight: 50-75% of anaerobic digestion sludge, 10-25% of clay, 5-15% of wollastonite, and 5-10% of talcum. The glazed ceramic tile preparation method comprises preparing blank and glaze, forming a green body, drying, biscuiting, glazing the green body, performing glaze firing on the green body, and the like. The green body of the glazed ceramic tile is high in strength and small in shrinkage degree when being biscuited, the biscuiting temperature scope of the green body is expanded, and phenomena that the green body surface foams, generates black hearts and is reduced in compressive strength and the like because of too large ignition loss are effectively avoided. The glazed ceramic tile preparation method enables the glazed ceramic tile surface to be solid, flat, free of black heart phenomenon, and high in strength, and also the preparation method is simple and easily controllable in technology, high in yield and high in production efficiency, and production cost is effectively reduced.

The invention discloses a production process of powder sintered alnico permanent magnet alloy, which is characterized in that the steps are as follows: step 1, weighing materials: weighing Co 24.5-26%, Ni 13.5-14.5%, Cu 2 by weight percentage ‑3%, Al 8‑9%, Nb 0‑0.5%, Ti 0‑0.5%, B 0‑0.3%, Fe 46.2‑52%; Step 2, vacuum melting; Step 3, initial mixing; Step 4, again Mixing; step five, pressing; step six, sintering: the pressed product is sintered in a vacuum sintering furnace for 8 stages, and then cooled to obtain a sintered product; step seven, heat treatment; step eight, tempering. The present invention improves the magnetic properties, and the magnetic properties Br of the finished product produced by the present invention can reach 1232mT, Hcb can reach 53.4kA / m, and BHmax can reach 37.6kJ / m 3 .

The invention discloses a fabrication process of low expansion Nixing pottery. The process comprises the steps of blank preparation, blank forming, blank trimming, blank stoving and blank firing. The process of low expansion Nixing pottery is characterized in that the blank prepared from, by weight, 5-6 parts of east mud, 4-5 parts of west mud, 0.5-1 part of NiO, 1.5-2 parts of TiO2 and 1.5-2 parts of MgO. The Nixing dishes prepared through the fabrication process of low expansion Nixing pottery have the advantages of excellent thermal shock resistance, good mechanical strength and capable of being used in various heat sources directly without cracking even after being used for a long period. The Nixing pottery dishes prepared through the process of low expansion Nixing pottery can meet the requirements of QB / T2580-2002 <Fine ceramic cookware>.

The invention discloses a large-scale preparation of HfO 2 ‑ThO 2 The method for ultra-high temperature oxide composite phase ceramics comprises the following steps: HfO 2 Powder, ThO 2 powder and sintering additives are mixed to obtain mixed powder, granulated to obtain powder, and the powder is molded to obtain a composite ceramic green body, and then sintered in an oxidizing atmosphere to obtain HfO 2 ‑ThO 2 Ultra-high temperature composite phase ceramics; the compression molding adopts secondary pressure holding; the invention provides a kind of HfO under normal pressure for the first time 2 ‑ThO 2 A method for sintering and densifying ultra-high temperature oxide multi-phase ceramics. The inventors found that in the presence of sintering aids, the green body obtained by using the second pressure during the pressing process can be sintered in an oxidizing atmosphere to obtain a dense HfO 2 ‑ThO 2 Ultra-high temperature oxide composite ceramics. The preparation method of the present invention can realize low-cost and large-scale production because the sintering is carried out under normal pressure without special equipment.

The invention discloses a magnesium-alloy ultrasound-assisted welding method by using pure Pb as an intermediate reaction material layer. Through the screening of the design conditions of the intermediate reactive material layer, the pure Pb foil is selected as the intermediate reaction material layer and is welded with the magnesium alloy; the pure Pb foil used as the intermediate reaction material layer is beneficial to reduce the welding temperature; the welding is completed in the atmosphere environment without the assisting of brazing filler metals; the welding method is green and environmentally friendly; only a small amount of brittle intermetallic compounds are produced during the welding process; and a full-Mg based solid solution joint is obtained. The welding time is short, thejoint has a high mechanical property and the welding effect is good.

The invention provides a method for preparing a (Mn, Co) 3O4-Li2O spinel coating through liquid phase sintering and application of the (Mn, Co) 3O4-Li2O spinel coating. According to the method, through liquid phase sintering, the densification pre-reduction temperature of the (Mn, Co) 3O4 coating is reduced by adding low-melting-point metal salt LiNO3; according to the method, the coating sintering process of pre-reduction and re-oxidation is adopted, the microstructure of an original material can be rearranged in the sintering process to form new nano particles, particle distribution is more uniform, the uniform microstructure has high hindering capacity on overgrowth of crystal grains, and the oxidation resistance of the coating can be improved.

The invention discloses sintered neodymium iron boron magnet steel which comprises, in weight percent, 27.5-30.5wt% of rare earth element R, 0.5-1.0wt% of Al, 0.03-0.06wt% of Pr, 0.03-0.06wt% of C, 0.35-0.5wt% of Cu, 0.08-0.12wt% of Nd, 0.2-0.4wt% of Ga, 0.2-0.5wt% of Pm, 0.6-1.2wt% of Co, 0.75-1.35wt% of B and the balance Fe. The rare earth element R is mixture of Ce, Ho, Sm, Dy and Tm, and the mixed weight ratio of Ce, Ho, Sm, Dy to Tm is 5:4:1:0.3:2. The invention further discloses a preparation method of the magnet steel. The preparation method is easy to operate, Ho and the rare earth elements such as Ce, Sm, Dy and Tm are added, part of expensive Nd and Pr is replaced, cost is reduced, corrosion resistance of the sintered neodymium iron boron magnet steel can be effectively improvedby adding Ho, weightlessness is reduced, Ce replaces Nd, eutectic temperature is reduced, so that sintering tempering temperature is reduced, cost is saved, and good performances are kept.

The invention discloses ultra-low temperature sintered ceramic tiles and a preparation method thereof. The green tiles have a composite solvent system, so eutectic point is improved; the advanced sintering and gradual occurrence of a liquid phase with high viscosity in areas at different sintering temperatures reduce the sintering temperature greatly and enlarges the range of the sintering temperature of the green tiles; and thus, the performance indexes of the product are guaranteed. The preparation method of the invention fulfills the aim of energy conservation and consumption reduction, greatly reduces the emission of CO2 waste gas, can create economic and social benefit, has a great significance for protecting natural environment and contributes to the sustained development of industrial production.