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300results about How to "Improve toughness" patented technology

Long-acting fertilizer specially used for dry-farming sweet potatoes and preparation method for long-acting fertilizer

The invention relates to a long-acting fertilizer specially used for dry-farming sweet potatoes and a preparation method for the long-acting fertilizer. The fertilizer is granular and comprises three layers of structures, namely a fertilizer kernel, a wrapping film coating layer and a water-retaining agent coating layer in sequence from inside to outside. The kernel of the long-acting fertilizer specially used for the dry-farming sweet potatoes contains effective components such as a nitrogen fertilizer, a phosphorus fertilizer, a potassic fertilizer and a composite micro fertilizer which are specially suitable for the sweet potatoes; the wrapping film coating layer controls the speed of water entering a film and controls and regulates release of nutrition; the water-retaining agent coating layer can effectively retain water in soil and rainwater; lateral seepage runoff and water evaporation are alleviated, and front and middle-stage growth of the sweet potatoes is guaranteed. The preparation method for the fertilizer is implemented through one-time spraying; the technically occupied space is small, the equipment investment is small, the preparation process is simple and the energy consumption is low; the wrapping film material is low in cost, so that the price of the fertilizer is greatly reduced.
Owner:QINGDAO AGRI UNIV

Nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material and preparation thereof

ActiveCN103205053AImprove toughnessHold powder well
The invention relates to a cable material, and in particular relates to a nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material and a preparation method thereof. The polyolefin cable material comprises the following components: EVA (Ethylene Vinyl-acetate Copolymer), MLLDPE (Linear Low-Density Polyethylene), an interfacial compatibilizer, aluminum hydroxide, nanometer strong micropowder, an antioxidant and a lubricant. The preparation method comprises the following steps of: evenly stirring the EVA and the MLLDPE as basic materials, the interfacial compatibilizer, the aluminum hydroxide, the nanometer strong micropowder, the antioxidant and the lubricant in a high-speed mixer; performing banburying in a banbury mixer at the temperature between 120 and 150 DEG C; extruding by using double screw rods; granulating by grinding and hot-cutting; conveying materials by using a cyclone separator; and screening by using a vibrating screen and packaging, thereby obtaining the finished nano-modified low-shrinkage low-smoke halogen-free and flame-retardant polyolefin cable material product. Compared with the common low-smoke halogen-free and flame-retardant polyolefin cable material, the polyolefin cable material provided by the invention has the effects that the thermal aging resistance is enhanced; the shrinkage performance of the product is improved greatly; and the problem that the low-smoke halogen-free polyolefin cable material is easy to shrink at the high temperature is solved.
Owner:JIANGSU LINRY NEW MSTAR TECH

Al and Ti microalloyed high-strength, high-toughness and medium-entropy alloy and preparation method thereof

InactiveCN111411285AImprove organization and performanceImprove toughness
The invention discloses an Al and Ti microalloyed high-strength and high-toughness medium-entropy alloy and a preparation method thereof. The alloy comprises (CoNiFe) 95Al5-xTix, wherein Co, Ni and Feare proportioned according to equal atoms, and a value range of x is 1-4. A preparation process route of the alloy comprises the steps of vacuum arc melting, homogenizing annealing, forging (hot forging), homogenizing annealing, rolling (cold rolling) and annealing heat treatment. The preparation method comprises the following steps of firstly, proportioning Co, Ni, Fe, Al and Ti particles/blocksaccording to a ratio, smelting the particles/blocks into ingots by adopting a vacuum arc melting method, and carrying out homogenizing annealing; secondly, after the cast ingots are heated to a certain temperature, carrying out forging forming, and then carrying out homogenizing annealing; and finally, preparing the forged alloy into a plate with the thickness of 1-1.5 mm through rolling (cold rolling), and performing annealing heat treatment at the temperature of 600-1000 DEG C. Through reasonable plastic processing and annealing heat treatment processes, the strength and toughness of the alloy can be improved, and the medium-entropy alloy with excellent comprehensive performance can be prepared.
Owner:SOUTHEAST UNIV
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