10results about How to "Large operating window" patented technology

The application provides a split-gate flash memory and a manufacturing method thereof. The memory comprises a semiconductor substrate, has an active region and an isolation structure, and part of the surface of the isolation structure is lower than the surface of the active region to form a groove; a coupling medium layer covers the top and sidewall of the active region; a floating gate is located on the surface of the coupling medium layer and surrounds the top and sidewall of the active region and does not completely fill the groove; an inter-electrode medium layer is located on the surface of the floating gate; a control gate is located on the surface of the inter-electrode medium layer and fills the remaining part of the groove; a word line is located on the sidewall of the floating gate and the control gate; and a tunneling medium layer is located between the word line and the floating gate, the control gate and the substrate. The application enhances the control force by three-dimensionally surrounding the channel with the floating gate, reduces the risk of punch-through, increases the coupling rate by filling the groove with the control gate, reduces the operating voltage, and improves the reliability of the device.

This invention belongs to the field of engineered wood products manufacturing, specifically a method for preparing low-formaldehyde finger-jointed boards based on bio-based modified adhesives. The method includes preparing an adhesive composed of modified soybean protein, non-formaldehyde crosslinking agents, micro / nano cellulose, nano-silica, and epoxidized vegetable oil elastomers; pre-treating the wood and cutting the finger joints; applying a sealing liquid via atomization for end-face damping treatment; performing quantitative adhesive application and stepped butt joint molding; and employing a multi-stage hot-pressing process involving preheating penetration, high-temperature curing, and cooling and pressure holding. Through the above technical solution, this application can achieve the formation of a dense adhesive film at the finger joint interface, significantly improving bonding strength and stability while reducing formaldehyde release.

This invention relates to the field of lithium-ion battery cathode material testing technology, specifically to a method for determining the manganese leaching amount of lithium manganese iron phosphate (LFP) materials. The method includes: extracting a LFP sample in a weakly acidic buffer solution simulating the battery's operating environment; separating the solid and liquid phases to obtain the test solution; and simultaneously performing a blank test; transferring the test solution; adding a buffer solution capable of selectively complexing manganese ions and eliminating iron ion interference to adjust the pH value of the system; using a platinum electrode as the indicator electrode and a saturated calomel electrode as the reference electrode; and performing potentiometric titration using a redox standard titration solution; determining the titration endpoint based on the potential jump; and recording the titration volume; and calculating the manganese leaching amount based on the titration volume, the blank test value, and the sample mass. This invention achieves selective and high-precision determination of manganese leaching; the method requires no expensive instruments, is low-cost, and has good reproducibility, making it suitable for the research and development and production quality control of LFP materials.

This invention discloses a method for preparing nano-cobalt phosphate and its application, belonging to the field of new energy technology. The preparation method provided by this invention includes the following steps: S1. A cobalt salt solution, a phosphorus source solution, and a pH adjuster are simultaneously introduced into a stirred base liquid; the base liquid is water; the concentration of the cobalt salt solution is 1–3 mol / L; during the simultaneous introduction process, the pH of the resulting mixture is controlled to be 8–10, and the temperature is controlled to be 20–40℃; S2. The solid product obtained in step S1 is calcined. The preparation method provided by this invention can prepare nano-cobalt phosphate with relatively uniform particle size and pure composition at a mild temperature without the use of thickeners or other additives. This invention also provides applications of the above preparation method.

The application belongs to the technical field of electrical insulation materials and nanocomposite material preparation, and discloses a method for preparing aramid composite insulation film by sorting long halloysite nanotubes. In the method, the halloysite nanotube raw material is sorted by natural settlement in water to obtain long halloysite nanotubes, which are then compounded with aramid nanofibers, and the composite insulation film with a dense staggered layered structure is prepared through spray film forming, solvent replacement and heat pressing densification treatment. The obtained film has excellent mechanical properties, insulation properties and high-temperature stability, and is resistant to acid, alkali, salt and organic solvent corrosion, and has good moisture-proof characteristics after hydrophobic modification. The sorting process is green and environmentally friendly, does not require organic additives, has excellent comprehensive performance, and is suitable for high-end insulation fields such as dry-type transformers, new energy motors and aviation electrical appliances.

This invention discloses an integrated molding process for automotive suspension buffer blocks, relating to the technical field of automotive suspension system components. To address the problems of uneven microporous structure, mismatched foaming-gel rates, long production cycles, poor low-temperature performance, and insufficient insert bonding strength in existing processes, the key technical points are: S1: Preparation of modified polyol: Modified polyol components are obtained by high-speed dispersion and mixing of nanoparticles with an average particle size of 20-80 nm, surface-modified with silane coupling agent, and polycaprolactone polyol; S2: Synthesis and degassing of prepolymer: The modified polyol components are reacted with diphenylmethane diisocyanate to obtain a prepolymer with a terminal isocyanate group content of 5-12 wt%, resulting in a uniform micropore size distribution of 50-250 μm, density fluctuation ≤ ±0.02 g / cm³, compression set controlled within 8%, and dynamic fatigue life exceeding 2 million cycles, thus solving the problems of poor microporous structure uniformity, high compression set, and insufficient fatigue life.

The invention discloses ardealite-based fireproof mortar and a preparation method thereof, and relates to the technical field of building materials, the ardealite-based fireproof mortar is prepared from the following raw materials by mass: 550-600 parts of beta-type semi-hydrated ardealite powder; 200 to 240 parts of glass beads; 140 to 160 parts of anhydrous gypsum; 25 to 35 parts of phosphogypsum Portland cement; 8 to 12 parts of high aluminum fiber; 2.5 to 3.5 parts of cellulose ether; 12 to 18 parts of redispersible latex powder; the retarder is a boric acid or citric acid retarder, the dry density of the mortar is 450-500 kg / m, the 28-day compressive strength of the mortar is larger than or equal to 1.4 MPa, and the tensile adhesive strength of the mortar is larger than or equal to 0.15 MPa. According to the ardealite-based fireproof mortar and the preparation method thereof, the ardealite utilization rate is up to 55%-60%, industrial waste residues are effectively consumed, the dry density is controlled to be 450-500 kg / m, the compressive strength is larger than or equal to 1.4 MPa, the tensile adhesive strength is larger than or equal to 0.15 MPa, and the fire endurance can reach 1.5 h or above through the synergistic effect of the high-aluminum fibers and the glass beads.

The invention discloses a novel aluminum etching solution, and belongs to the technical field of semiconductor packaging. The etching liquid comprises the following components in percentage by mass: 10%-50% of phosphoric acid, 1%-10% of an oxidizing agent, 1%-10% of a buffering agent, 0.01%-1% of a catalyst, 0.01%-1% of a complexing agent and the balance of water. Through the synergistic effect of the catalyst and the oxidizing agent, the etching rate and stability are ensured while the content of phosphoric acid is reduced, and the problems that an existing high-concentration phosphoric acid system is serious in pollution and rapid in rate attenuation are solved. The etching liquid is uniform in etching effect, free of precipitation, high in process adaptability and suitable for high-precision etching of aluminum / aluminum alloy layers in the field of semiconductor packaging, and has remarkable environmental protection benefits and industrial application value.

The application provides a multi-stimulus response shape memory polyurethane composite material and application thereof. The composite material comprises a shape memory polyurethane material and a nano-functional filler, and the nano-functional filler is uniformly embedded in the shape memory polyurethane material. The provided composite material can realize multi-stimulus response and has excellent performance.

This invention provides a method for preparing calcium ferrite from steel slag and desulfurized gypsum through sodium transformation. The method includes: leaching steel slag with water, separating the solid and liquid phases to obtain steel slag A and a potassium chloride-containing solution S1; adding limestone powder to the desulfurized gypsum, mixing thoroughly, and drying to obtain anhydrous gypsum B; mixing, grinding, and calcining steel slag A, anhydrous gypsum B, and an alkali metal carbonate additive to obtain clinker; leaching the clinker with water, separating the solid and liquid phases to obtain a solid phase G1 and a sulfate-rich solution S2; washing and drying the solid phase G1 to obtain calcium ferrite; adding a soluble calcium salt to solution S2 to initiate a metathesis reaction, separating the solid and liquid phases to obtain a solid phase G2 and an alkali metal salt solution; dehydrating the solid phase G2 to obtain β-hemihydrate calcium sulfate; and evaporating and crystallizing the alkali metal salt solution to obtain the alkali metal salt. This invention achieves synergistic value-added utilization of steel slag and desulfurized gypsum, allowing the alkali metal salt to be recycled back to the calcination process. The process is simple, the reaction conditions are mild, and it is easy to scale up for continuous industrial production.