34results about How to "Improve effective quality" patented technology

The invention discloses an integrated caseless ammunition gun system. The system comprises a caseless ammunition, and a barrel and a bolt which are matched with each other, wherein the caseless ammunition comprises a bullet body with the inner diameter being consistent with that of the barrel; a warhead cone and a gun propellant column are formed in the bullet body; a bottom fire platform and two burners are formed in the bottom of the bullet body; the bottom fire platform is connected with the gun propellant column; a positioning bullet retreating groove is machined on the outer side of the bullet body. A bore with a sliding chute inside is formed in the bore barrel; a positioning sliding block combination which can be matched with the positioning bullet retreating groove is arranged in the sliding chute; a bullet retreating sliding chute which can ensure that the caseless ammunition is retreated from the bore is formed in the bore. The bolt comprises a bolt body and a bullet pushing slope arranged on the bolt body, wherein an elastic bullet grasping hook matched with the positioning bullet retreating groove is arranged on the bolt body; an elastic sliding block is arranged on the elastic bullet grasping hook. The system adopts the caseless ammunition, does not have the risk of spontaneous combustion, is accurate in positioning, has spinning capacity during shooting, and solves problems of positioning, releasing and shooting of an integrated caseless ammunition. The bore barrel and the bolt can simplify the system structure, and reduce the manufacture cost and improve the reliability.

An II type superlattice photoelectric detector possessing an absorption enhancement structure and a manufacturing method thereof are disclosed. The manufacturing method comprises the following steps of carrying out molecular-beam epitaxial growth on a substrate so as to form an absorption enhancement layer; carrying out molecular-beam epitaxial growth on an upper surface of the absorption enhancement layer so as to form an absorption layer, wherein the absorption layer is an N structure II type superlattice structure; and completing manufacturing of the II type superlattice photoelectric detector possessing the absorption enhancement structure. In the invention, through adopting an N structure II type superlattice material as the absorption layer and simultaneously introducing the absorption enhancement layer, a device can acquire 80% of high quantum efficiency at a target wave length position and a good narrow bandwidth characteristic is embodied nearby a target wave length.

An oxygen-enriched vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst, preparation method and application, the nano-flaky bismuth oxycarbonate is heat-treated and then dispersed in an ethanol solution, then the black phosphorus quantum dot solution is added, and after ultrasonic uniformity, the The microwave reaction is carried out at a power of 500-800 W to obtain an oxygen-rich vacancy type black phosphorus quantum dot / bismuth oxycarbonate visible light catalyst. The oxygen-enriched vacancy type black phosphorus quantum dots / bismuth oxycarbonate prepared by the invention can effectively remove NO from ambient air pollutants under visible light irradiation, the synthesis method is simple, fast and low in cost, and the black phosphorus quantum dots are evenly loaded, and have the advantages of good application prospects.

The invention provides a method for preparing high-performance Half-Heusler block thermoelectric materials at ultrahigh speed and low cost. The method particularly includes the steps that firstly, according to the general formula ABX of Half-Heusler compounds, powder A, powder B and powder X are weighed at the chemical stoichiometric ratio of 1:1:1, used as raw materials and uniformly mixed, and then an reactant is acquired; secondly, the reactant generates a combustion synthesis reaction, and cooling or quenching is conducted after the reaction is finished; thirdly, a product acquired through the second step is ground into fine powder, then PAS is conducted, and then the high-performance Half-Heusler block thermoelectric materials are acquired. According to the method, by the combination of the combustion synthesis reaction with the PAS process, the high-performance Half-Heusler block thermoelectric materials can be prepared within 15 min, and the method has the advantages that preparation time is short, energy consumption is low, the process is simple, the requirement for equipment is low, repeatability is good, and the method is suitable for large-scale production.

The invention belongs to the field of new materials, and in particular relates to a preparation method of a metal organic framework MOF-2 polycrystalline film. The method is to dissolve terephthalic acid in a mixed solvent of ethanol and water to make a saturated solution, take the zinc sheet as the anode and provide the zinc source of the MOF-2 material at the same time, take the zinc sheet or other inert electrodes as the cathode, and immerse in the The metal organic framework MOF-2 polycrystalline film can be obtained on the anode zinc sheet in the above saturated solution, and a DC voltage is applied. The invention solves the problems of continuous and uniform growth and film formation of the MOF-2 polycrystalline film and the bonding between the film and the carrier. The synthesized MOF-2 polycrystalline film has continuous layers, uniform grain size, and no defects. Compared with other MOF-2 polycrystalline film preparation methods, the present invention not only has high film effective quality, but also has simple process, short time and fast production process. It has good stability, is suitable for large-scale industrial production, and has a good application prospect.

The invention discloses a large-mass test part mounting device on a vibration centrifuge. An electric vibration table is arranged on a rotating arm of the vibration centrifuge, and one end of a test part is mounted on the face of the electric vibration table; an auxiliary expansion table is mounted on the rotating arm, one side face of the auxiliary expansion table is close to one side face of the test part, and a gap is reserved between the one side face of the auxiliary expansion table and one side face of the test part; a hydrostatic bearing is mounted on one side face of the auxiliary expansion table, a clamp is mounted on the other opposite side face of the hydrostatic bearing, and one side face of the test part is mounted on the clamp; the manner of combining the hydrostatic bearing and the auxiliary expansion table is adopted to bear gravity or centrifugal force borne by the test part, and the test part cannot be completely mounted on the face of the electric vibration table. The clamp, the hydrostatic bearing and the auxiliary expansion table are mounted on the rotary arm, the load capacity of the test part is obviously improved, and the effective quality of the test part and the whole test capacity of the vibration centrifuge can be obviously improved.