289results about How to "Applicable production" patented technology

A high-efficiency LED provided with a surface micro-column array structure and based on diffraction effect has a structure below: N type GaN grows on a cushioning layer of a sapphire substrate. A GaN active layer grows on the N type GaN layer. A P type GaN layer grows on the active layer. A micro-column array is etched on the P type GaN layer, which can be periodically or aperiodiclaly arranged two-dimensional structure. A P type electrode and a P type bonding pad are laid on the P type GaN layer. An N type electrode and an N type bonding pad are arranged on the N type GaN layer. The present invention has the advantages that light diffusion effect is utilized and light is fully exported through the micro-column to improve lighting efficiency and ensure even light distribution on a light surface. Compared with LED adopting two-dimensional photonic crystal, the structure needs simple production technique and lower production cost. Compared with traditional LED suffering roughly processed surfaces, the structure brings much higher light emission efficiency.

The invention discloses a method for preparing an organic montmorillonite / polyurethane self-repair coating. The method comprises the following steps: (1) organic treatment of montmorillonite, namely slowly adding an acidified modifier into an intensely stirred montmorillonite water solution, reacting at 80 DEG C for 24 hours, centrifuging, washing to obtain modified montmorillonite, then dissolving the modified montmorillonite into a mixed solvent (the ratio of ketone to deionized water is 1:1), intercalating a corrosion inhibitor into the modified montmorillonite, vacuumizing for 5 hours, washing, grinding, and sieving with a 350-mesh sieve to obtain organic montmorillonite; (2) preparation (parts by mass) of the organic montmorillonite / polyurethane self-repair coating, namely uniformly mixing 50-80 parts of hydroxyl resin, 1-5 parts of the organic montmorillonite, 1-40 parts of the mixed solvent and 3-10 parts of aid into a high-speed ball mill to obtain organic montmorillonite / hydroxyl resin, then uniformly mixing the modified hydroxyl resin and a curing agent at a certain mass ratio to obtain the organic montmorillonite / polyurethane self-repair coating, and drying and curing to form an organic montmorillonite / polyurethane self-repair coating layer.

The invention relates to a molybdenum-vanadium based composite oxide catalyst and a preparation and an application thereof. The molybdenum-vanadium based composite oxide catalyst has the general formula of Mo1VaXbYcOd which is a composite metal oxide, wherein X is at least one element of niobium, antimony, bismuth, tellurium, tungsten, cobalt, nickel and neodymium; Y is at least one element of palladium, platinum, gold, silver, rhodium, potassium and cesium; a, b, c and d represent atomic ratios of vanadium, X, Y and oxygen to molybdenum respectively; a is 0.1-1.0, b is 0-0.3, c is 0-0.2, and d is a number which is determined by valence numbers of other elements existing in the composite metal oxide of the general formula and is the same as the valence numbers. The catalyst is used for selectively oxidizing lactic acid into pyruvic acid at the temperature of lower than 300 DEG C. The catalyst used in the method is easy to prepare and high in activity, and has high selectivity for the product pyruvic acid under the condition of semi-oxidation reaction. Compared with an existing method, the synthetic method of pyruvic acid has the advantages that the reaction materials are low in cost and easily available, the technological operation is simple, the reaction atom economy is high, and the selectivity for pyruvic acid is high.