8results about How to "Increase the number density" patented technology

This invention belongs to the field of aluminum alloy materials technology, and relates to a high-strength and ductile aluminum alloy and its preparation method. The alloy comprises, by mass fraction: 2-6% Mg, 0.4-0.9% Mn, 0.2-0.6% Si, 0.05-0.15% Sn, Fe≤0.15%, Ti≤0.1%, with the balance being Al. By introducing Sn, a low-melting-point MgSiSn primary phase is formed in the as-cast stage, and transforms from a continuous network to a discontinuous granular structure during homogenization heat treatment, weakening the adverse effects of brittle intermetallic compounds at grain boundaries. Simultaneously, Sn dissolved in the aluminum matrix forms a nanoscale MgSiSn precipitate during homogenization, serving as a heterogeneous nucleation core for the Mn-containing second phase, lowering its nucleation energy barrier, and promoting high-density, fine, and uniform precipitation, thereby achieving a synergistic improvement in the alloy's strength and ductility.

The invention discloses an aluminum alloy and a preparation method and application thereof. The aluminum alloy, in an Al-Mg alloy system, simultaneously contains Mn, Cr, Cu, Zn and X element (at least two of Sr, Mo and Zr) by optimizing the alloy formula, and further controls their contents. The combination can weaken the damage of coarse second phase particles to strength and forming performance, and improve the tolerance of the alloy to impurity elements such as Fe and Si and Mn element. Therefore, recycled materials can be used for production, and the proportion of original aluminum used is reduced. The aluminum alloy itself has very good recyclability, is economical, low-carbon and energy-saving. During preparation, the aluminum alloy is first made into an ingot, and then subjected to homogenization treatment, hot rough rolling, hot finish rolling, cold rolling and annealing treatment. Practice shows that the aluminum alloy of the invention at least achieves a balance of alloy properties such as tensile strength, yield strength and elongation after fracture, and can be used in the fields of preparing automobile body parts.

The invention discloses radiation-proof concrete as well as a preparation method and application thereof. The anti-radiation concrete provided by the invention comprises the following preparation raw materials in parts by mass: 100 parts of Portland cement; 0.1 part to 1 part of polypyrrole nanocrystal; 3 to 10 parts of acrylamide; 0.005 to 0.1 part of an initiator; 0.005 to 0.2 part of a cross-linking agent; 5 to 10 parts of steel slag; 8 to 20 parts of ferronickel slag; 160 to 200 parts of fine aggregate; 270 to 330 parts of coarse aggregate; 1 part to 3.5 parts of a water reducing agent; and 40 to 65 parts of water. The preparation method of the anti-radiation concrete is simple, and comprises the following steps: uniformly mixing all the components in batches, and forming and curing to obtain the anti-radiation concrete. The anti-radiation concrete disclosed by the invention has the advantages of strong neutron ray protection capability, high strength, moderate self weight and the like, the preparation method is simple, the raw materials are easy to obtain, and the anti-radiation concrete is suitable for large-scale industrial application in the field of radiation protection.

The present invention belongs to the field of microbial technology, and specifically relates to an application of Akkermansia muciniphila in preparing a product for preventing, treating and / or assisting in treating male reproductive damage. The present invention provides an application of Akkermansia muciniphila in preparing a product for preventing, treating and / or assisting in treating male reproductive damage, wherein the Akkermansia muciniphila is deposited in CGMCC with a deposit number of CGMCC No. 20955. The Akkermansia muciniphila can effectively improve the total number of sperm, viability, vitality and related motor parameter levels to reduce reproductive damage induced by enteritis.

The invention discloses a powder blowing agent for powder spraying metallurgy and a preparation method and application thereof, belonging to the technical field of alloy smelting. The powder blowing agent contains the following elements in mass percentage: Fe: 50.0-85.0%, Cr: 0-30.0%, Ni: 0-30.0%, W: 0-5.0%, RE: 0.2-10.0%, Ti: 0.1-8.0%, Si: 0-10.0%, O: 0.1-10.0%; and the mass proportion of RE, Si, O, and Ti elements meets (RE+Si+O) / Ti is (2:1)-(50:1); the RE and O elements exist in the powder blowing agent in the form of solid solution; the RE is a rare earth. The powder blowing agent is produced by mechanical alloying, and the particle size range suitable for powder spraying metallurgy is selected by screening. The powder blowing agent can introduce solid solution oxygen into smelting steel to improve the comprehensive performance of the material.

This invention discloses a high-strength, high-conductivity copper-silver alloy for communication connectors and its preparation method, belonging to the technical field of copper alloy materials. The process includes: S1 melting and casting, the alloy containing Ag and one or more of the amplitude modulation decomposition inducing elements Ni, Co, Al, Ti, and Fe; S2 homogenization treatment; S3 cooling at 10-50℃ / h to 350-550℃ and holding for 2-24h to induce amplitude modulation decomposition and form a nanoscale periodic amplitude modulation structure; S4 cold deformation processing; S5 multi-stage gradient aging: holding at 200-350℃ for 1-5h, heating at 5-20℃ / h to 400-500℃ and holding for 2-8h, cooling at ≤10℃ / h to 300-350℃ and holding for 4-12h to form a periodically arrayed coherent nano-precipitated phase; S6 preparing an inner self-lubricating plating layer and an outer protective coating. This invention guides the orderly growth of precipitates using an amplitude-modulated template, resulting in an alloy with tensile strength ≥470MPa, conductivity ≥89%IACS, elongation ≥6%, and excellent high-temperature stability, making it suitable for connectors used in extreme environments such as 5G communication and deep space exploration.

The invention relates to the technical field of glass packaging, and discloses glass spacing paper which is provided with wrinkled ridges and wrinkled valleys which are arranged continuously or at intervals in the length direction of the paper, and 10-15 wrinkled ridges are arranged in the length range of every 10 mm of the glass spacing paper. According to the glass spacing paper, paper web fiber bond bonds are broken due to wrinkling treatment, the number of exposed fiber free hydroxyl groups can be increased, the chemical performance of the paper is improved, then the paper is softer and looser, and the moisture absorption performance and the air permeability of the paper are improved; due to the wrinkling treatment, the elongation of the paper can be effectively improved, the toughness of the paper is further improved, the probability of brittle fracture of the paper is reduced, the pH value of the paper can reach 4.8 or below, the impact resistance of the paper can be improved, and a better protection effect on glass can be achieved; in addition, due to the wrinkling treatment, the surface roughness of the paper can be increased, and the surface roughness characteristic is beneficial to enhancing the surface friction coefficient of the glass, so that the glass is prevented from sliding or slipping off.

The invention discloses an aluminum alloy as well as a preparation method and application thereof, the aluminum alloy comprises the following components in percentage by weight: 0.1 to 0.2 percent of Cu, 0.4 to 0.5 percent of Mn, 0.2 to 0.5 percent of Zn and 0.15 to 0.2 percent of Cr, and the weight ratio of Mn to Cr is 2.5 to 3. According to the aluminum alloy, precipitation of precipitation strengthening phases such as beta and Q is promoted to the maximum extent, the Mn / Cr content ratio is controlled, and a fine and evenly-distributed alpha-Al (FeMnCr) Si dispersed phase is obtained in combination with two-stage homogenization treatment, so that the purpose of grain refinement is achieved, and the mechanical property and corrosion resistance of a 6-series aluminum alloy profile are greatly improved on the basis of precipitation strengthening and fine grain strengthening.