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

The present invention relates to a welding method for a second generation high temperature superconducting wire including a substrate, a buffer layer, a superconductor layer, and a stabilizing material layer, wherein parts of the stabilizing material layers contained in two strands of the second generation high temperature superconducting wire are removed, the superconductor layers of two strands of the second generation high temperature superconducting wire exposed by the removal of the stabilizing material layer abut each other and are heated to the melting point of the superconductor layer to melt-diffuse the abutting superconductor layers and weld two strands of the second generation high temperature superconducting wire together. Subsequently, the welded portion is oxygenation-annealed under an oxygen atmosphere to recover superconducting properties of the second high temperature superconducting wire. The above-described configuration of the present invention enables superconductor layers to directly abut each other and to be melt-diffused without using a mediator, thus producing a wire having a full length with a rare junction resistance as compared to a normal conduction junction method. Specifically, the present invention brings a partial oxygen pressure to a nearly vacuum state to lower the melting point, thereby enabling junction processes to be performed without melting a stabilizing material layer containing silver (Ag).

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.

An electrolytic solution for a high-power start-stop battery, the electrolytic solution comprising 100 parts by weight includes the following components by weight: 14-20 parts of lithium salt, 70-85 parts of organic solvent and functional additives 1-10 parts; the organic solvent is composed of the following components, each component accounts for 12-20 parts of ethylene carbonate EC, 5-11 parts of propylene carbonate PC, ethyl methyl carbonate EMC 10‑20 parts, Propyl Acetate PA 14‑22 parts and Propyl Propionate PP 12‑20 parts. The lithium-ion battery electrolyte of the present invention can effectively reduce the conductivity of the electrolyte at low temperature, improve the impedance of the interface film at low temperature, and then improve the charge and discharge power characteristics at low temperature, and further improve the high-temperature stability of the lithium salt and the interface film, reducing the The high-temperature side reaction of the electrolyte improves the high-temperature storage and high-temperature cycle performance of the battery.

The invention relates to a method for vanadium extraction from vanadium-titanium magnetite. According to the technical scheme of the method, vanadium-titanium magnetite concentrate is grinded till the vanadium-titanium magnetite concentrate with the particle size being smaller than 0.074 mm accounts for 60% or more by weight firstly, and vanadium-titanium magnetite concentrate powder is obtained; burdening is conducted according to the mass ratio of the vanadium-titanium magnetite concentrate powder to a roasting additive being 1:(0.04-0.06), even mixing is conducted, and a mixture is obtained; then the mixture is heated till the temperature is 850-1000 DEG C, heat preservation is conducted for 0.5-1.5 h, cooling is conducted till the temperature reaches the room temperature, and roasting slag is obtained; and then according to the liquid-solid ratio being (2-3):1 L / Kg, the roasting slag is placed into a sulfuric acid solution with the volume concentration being 10-20%, stirring is conducted, solid-liquid separation is conducted, and a leaching solution and leaching slag are obtained. The roasting additive is a mixture of sylvite and NaF, wherein the mass ratio of the sylvite to the NaF is 1:(0.5-2), and the sylvite is one or more of KCl, K2CO3, K2SO4 and KNO3. The method for vanadium extraction from the vanadium-titanium magnetite has the characteristics that the using quantity of the additive is low, the roasting temperature is low, the roasting time is short, the leaching rate of vanadium is high, and pollution is small.

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 discloses a preparation method of blue gradient glaze sanitary ceramic. A glaze material is prepared from basic glaze, silicon dioxide, dolomite, zinc oxide, zirconium silicate, feldsparpowder for glaze, vanadium-zirconium blue and the like; glaze slurry A and glaze slurry B, which have different vanadium-zirconium blue content, are prepared through the glaze material; the glaze slurry A and the glaze slurry B are sprayed on the surface of a sanitary ceramic white body in sequence, wherein the spraying amount of the glaze slurry A is gradually reduced from the top to the bottomof a white body spraying region and the spraying amount of the glaze slurry B is gradually increased from the top to the bottom of the white body spraying region; then the glazed white body is fired in a tunnel kiln at 1202 DEG C to 1250 DEG C for 15h to 18h to obtain a blue gradient glaze sanitary ceramic product. The obtained product meets the processing and utilization performance requirementsof the sanitary ceramic, has a good gradient effect and an extremely good decoration effect, and meets the requirements of individualized bathrooms.