34results about How to "No change in liquidity" patented technology

The invention discloses a preparation method for a perfluor polyether oil-based magnetic liquid. The magnetic liquid is formed by bare Fe[3]O[4] magnetic nano-particles, a perfluor polyether carboxylic acid surface active agent and a perfluor polyether oil-based carrier liquid in a prepared mode. The bare Fe[3]O[4] nano-particles with the average particle diameter of 10 nanometers are firstly prepared by the adoption of a chemical coprecipitation method; the perfluor polyether carboxylic acid surface active agent is then adopted for modifying the bare Fe[3]O[4] nano-particles; finally, the modified Fe[3]O[4] magnetic nano-particles and the perfluor polyether oil-based carrier liquid are blended through a high-energy ball milling or ultrasonic shaking method to form the uniform and stable perfluor polyether oil-based magnetic liquid, and the saturation magnetization of the perfluor polyether oil-based magnetic liquid is 14-600 Gs. The magnetic liquid has the excellent special performance of resisting to chemical corrosion, high temperature, low temperature resistance and radiation and never burning, can work stably for a long time at the temperature of 40 DEG C below zero-200 DEG C at the pH value of 1-14, and is particularly suitable for space stations, aeronautics and astronautics and other military industry fields.

The invention discloses ceramic metal powder and a preparation method and application thereof, and belongs to the technical field of 3D printing. The preparation method comprises the following steps:mixing a nano ceramic powder suspension and a metal powder suspension to enable nano ceramic powder to be uniformly adhered to the surface of metal powder. The nano ceramic powder and the metal powderare arranged in a suspension form and then mixed, so that a nano phase can be effectively and uniformly adhered to the surface of the metal powder, morphology, granularity and flowability of the metal powder are not changed, meanwhile, uniform distribution of the nano phase in the selective laser melting forming process is achieved, and cracks, stress concentration, segregation-free and the likeare reduced. Moreover, the method can overcome the defects of long period and high cost of developing new materials suitable for the SLM technology at present. The ceramic metal powder prepared through the method is good in fluidity, high in sphericity degree and particularly suitable for the selective laser melting technology.

The invention relates to a titanium dioxide nano ink which is prepared from the following raw materials in parts by weight: 0.5-2 parts of Al powder with the average particle size of 100nm, 3-5 parts of TiO2 powder with the average particle size of 500nm, 25-30 parts of pigment, 32-40 parts of polyamide resin, 13-17 parts of alkyd resin, 2-5 parts of 6# varnish and 0.1-0.5 part of polyalkyl ethylene glycol. The ink has the advantages of favorable stability, low pigment consumption, high covering power, full color, clear printed image and long service life, and is suitable for industrial production.

The invention relates to a silver nano ink, which comprises the following active ingredients in parts by weight: 10-15 parts of pigments, 3-5 parts of Ag powder with average particle size of 100nm, 10-20 parts of carbon black, 30-45 parts of rosin pentaerythrityl ester, 1-2 parts of linseed oil, and 1-3 parts of sodium aryl sulfonate. The ink is good in stability, less in pigment consumption, high in hiding power, full in color, clear in printed images, long in service life, and applicable to industrial production.

The invention discloses a plastic colored sand and a processing technique thereof. The plastic colored sand is prepared from 20-30 parts of color master batch pigment, 20-30 parts of low-molecular weight polyethylene, 10-20 parts of nano BaSO4 and 30-50 parts of titanium dioxide. The processing technique comprises the following steps: by using the titanium dioxide and carbon black as base materials, adding the low-molecular weight polyethylene to perform dispersion function, adding the nano BaSO4 to improve the dispersity, banburying, cooling, pulverizing and milling to obtain the product. The plastic colored sand has the advantages of favorable coloring power, favorable dispersity, no pollution and the like, is convenient for measurement, does not change the physical properties of the plastic, and can be widely used in plastics, rubber, chemical fibers, wire cables and other industries.

The invention discloses a high performance concrete prepared from wastes. The high performance concrete is prepared from, by mass, 150-300 parts of cement, 100-200 parts of fly ash, 100-200 parts of mineral powder, 700-1000 parts of waste sands, 700-1000 parts of waste stones, 5-15 parts of an additive, and 150-200 parts of water, wherein the waste sands are second area medium sands, the fineness modulus is 2.3-2.5, and the average particle size is 0.5-0.35mm; and the average particle size of the waste stones is 5.5-25mm. The high performance concrete is made by adopting the waste sands and the waste stones, so economy and environmental protection are realized, and the construction cracking problem is solved.

The invention provides a three-dimensional printer with high practicability. The three-dimensional printer breaks through the structure mode of the traditional three-dimensional printer; meanwhile a heating component further heats a raw material between a conveying casing and a conveying pipe, so that the temperature and the flowability of a raw material on the outer side of the conveying pipe are higher than that of a raw material on the inner side of the conveying pipe, that is, the temperature and the flowability of a raw material flowing out from a lower discharging channel are greater than that of a raw material flowing out from a third channel; during printing, a heating inclined plane is in contact with a printing layer in the lower layer, which is slightly cooled and solidified, and the upper surface of the lower layer printing layer is molten; then the raw material flowing out from the lower discharging channel is underlaid between the raw material flowing out from the third channel and the lower layer printing layer with the surface being molten; the raw material flowing out from the lower discharging channel achieves gluing effect to fuse the raw material flowing out from the third channel and the lower layer printing layer into a whole body, so that an obvious connection plane cannot occur between an upper layer printing layer and the lower layer printing layer, and the connection between adjacent printing layers is firmer.

The invention relates to a nano-particle-size ink which is composed of the following raw materials in parts by weight: 1-3 parts of Ag powder with the average particle size of 120-150nm, 1-3 parts of Al powder with the average particle size of 60-80nm, 1-3 parts of Cu powder with the average particle size of 200-230nm, 50-70 parts of pigment, 10-15 parts of pentaerythritol rosin ester, 18-22 parts of flaxseed oil, 12-20 parts of polyamide resin, 10-15 parts of alkyd resin, 1-2 parts of polyalkyl ethanediol and 1-2 parts of sodium arylsulfonate. The ink has the advantages of favorable stability, low pigment consumption, high covering power, full color, clear printing image and long service life, and is suitable for industrial production.

The invention relates to an environment-friendly energy-saving agent. The environment-friendly energy-saving agent is prepared from the following components of 3 to 10 parts of Span 20, 70 to 85 partsof naphthenic acid, and 10 to 25 parts of ammonia water in a mixing way. The environment-friendly energy-saving agent has the advantages that after mixing with diesel and water, the original color and the original flowing property of diesel are not changed, the oil and water are not separated, and the quality warranty period of original mixing is extended from dozens of days to half of one year.

The invention discloses a high efficiency liquid-permeable and gas-barrier fluid composite membrane system, which consists of an outer pipe, a connecting pipe, a membrane separation device, a communicating block and an output pipe. The outer pipe is connected to the membrane separation device, the output pipe is arranged at the bottom of the membrane separation device, and runs through the membrane separation device, the outer pipe and the communicating block are connected together by the connecting pipe, and the communicating block is connected to the membrane separation device. The inventionhas the beneficial effects that: an external mechanical force is utilized to control the rotation switch of a central shaft between a clockwise state and an anticlockwise state, thus reaching the purpose of controlling the separation and embedment of stab rods on puncture heads and holes on an outer ring layer, circulating motion of the stab rods is utilized to puncture bubbles accumulated on a separation membrane, embedment block bulges are arranged on the outer ring layer, and along with the rotation of a central shaft, bubbles at the edge can be punctured all the time, thus guaranteeing constant circulation performance of the separation membrane in the filtering process of liquid-permeable and gas-barrier fluid.

The invention discloses a method for maintaining the polishing efficiency of a magnetorheological polishing liquid, a stabilizer and a preparation method of the stabilizer, and solves the technical problems that the polishing efficiency stability of an existing magnetorheological polishing solution is poor, and the long-time use requirement cannot be met. The stabilizer comprises the following components in percentage by mass: 12%-30% of abrasive particles, 0.5%-5% of a wetting agent, 0.05%-5% of a dispersing agent, 0.2%-3% of an antioxidant and the balance of water. The magnetorheological polishing liquid has the advantages that the polishing efficiency is stable after the stabilizer is added, and long-time use is met.