36results about How to "No change in liquidity" patented technology

The present invention discloses a C100 high performance concrete, which is made of glue material, sand, stone, water and additive; the glue material comprises cement and mixture; the adding amount for the glue material is 500 to 600kg concrete per stere; thereinto, the cement is 42.5; the mixture comprises three components such as silicon powder, coal ash and scoria powder; the active SiO2, the mount of whch is 20 -40 percent of the total weight in the glue material, and the surface area of which is 1000-1200m2 / kg; is included in the glue material, the additive is polymer carboxyl acid with high-efficient dewater ability, the amount of which is 2 - 5 percent of the total glue material; The catalyzer is a mixture consisting of smoke ash and coal waste rock grain, the amount of which are 1-5 percent of the total weight in the glue material. The material does not need high-mark cement with simple produce process and low produce cost; the device can not only enhance the intension of the concrete, but also enhance the working performance and wear ability for the concrete.

The invention discloses an acrylic acid grafted polyvinyl alcohol enhancer, and a preparation method and application thereof. The preparation method comprises the following steps: adding 0.1-1 part of polyvinyl alcohol into 4-10 parts of water, and heating at 60-90 DEG C for 1-5 hours to gelatinize the polyvinyl alcohol; and adding 1-5 parts of acrylic acid, adding alkali to regulate the pH value to 7-8, adding 0.01-0.1 part of initiator, and reacting at 60-90 DEG C for 2-6 hours to obtain the acrylic acid grafted polyvinyl alcohol enhancer. The polyvinyl alcohol chain used as the framework is grafted with the polyacrylic acid branched chain with certain flexibility to form the block macromolecular structure with branched chain, so that the prepared enhancer has better enhancement effect; and the nano glaze slip with the enhancer can not easily crack after being applied to the ceramic billet surface. The enhancer has small influence on the viscosity and flowability of the glaze slip, so the glaze thickness on the billet surface can not be influenced when the traditional glazing method is adopted.

The invention discloses a perfluor polyether oil-based magnetic liquid. The magnetic liquid is composed of bare Fe[3]O[4] magnetic nano-particles, a perfluor polyether carboxylic acid surface active agent and a perfluor polyether oil-based carrier liquid, the ratio of the bare Fe[3]O[4] magnetic nano-particles (g) to the perfluor polyether carboxylic acid surface active agent (ml) is 40:1-1:1, and the ratio of the modified bare Fe[3]O[4] magnetic nano-particles (g) to the perfluor polyether carboxylic acid surface active agent (ml) is 1:20-2:1. 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, and 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, a magnetic liquid of a conventional type can not achieve the effect, and the perfluor polyether oil-based magnetic liquid is particularly suitable for space stations, aeronautics and astronautics and other military industry fields.

The invention provides a preparation method of TiB2 enhanced high-entropy alloy powder for 3D printing, which is characterized by comprising the following steps: (1) performing airflow classification on FeCoNiCr high-entropy alloy with the specification of 15-53mu m, and controlling the weight ratio of powder with the specification of less than 15mu m in the powder within 1% for later use; (2) putting nano TiB2 and the screened high-entropy alloy powder of the first part into a mixer according to a mass fraction ratio of 3: 97, and fully and uniformly mixing the nano TiB2 and the screened high-entropy alloy powder of the first part; (3) placing the mixed metal powder on a ball mill to be subjected to ball milling, introducing ultrasonic waves into the periphery of the ball mill, and embedding the nano TiB2 into the high-entropy alloy powder in a mechanical alloying mode; (4) putting the ball-milled high-entropy alloy powder into a drying box to be dried; and (5) performing airflow classification on the dried ball-milled high-entropy alloy powder, and it is guaranteed that the weight ratio of powder with the specification of less than 15mu m is controlled within 1%.

The invention provides a finished-product integrally jointed type three-dimensional printing head. The finished-product integrally jointed type three-dimensional printing head breaks through a construction form of a traditional three-dimensional printing head; a heating layer is used for carrying out further heating on raw materials in an outer conveying pipe, so that the temperature and flowability of the raw materials in the outer conveying pipe are higher than the temperature and flowability of raw materials in an inner conveying pipe; in a printing process, a lower inclined plane of a flexible heating block is in contact with a printing layer which is slightly cooled and condensed on a lower layer, so that the upper surface of the printing layer on the lower layer can be melted; meanwhile, the raw materials flowing out from an upper feeding hole and the raw materials flowing out from a lower feeding hole are gathered in a material discharging hole; the raw materials flowing out from the lower feeding hole are uniformly distributed at the periphery of the raw materials flowing out from the upper feeding hole to cover the periphery; then the raw materials flow out from a third channel and are in contact with the printing layer on the lower layer, so that the raw materials flowing out from the upper feeding hole and the printing layer on the lower layer are naturally fused toform a whole body, and an obvious jointing surface is not formed between a printing layer on an upper layer and the printing layer on the lower layer; the jointing between the adjacent printing layersis firmer.

The invention provides a three-dimensional printer (3DP) capable of producing firm finished products. Structural forms of traditional 3DPs are broken through, a heating layer is used for further heating raw materials in an outer conveying tube, and the temperature and fluidity of the raw materials in the outer conveying tube are made higher than those of raw materials in an inner conveying tube; in the printing process, the lower bevel of a flexible heating block makes contact with a lower printed layer which is slightly cooled and solidified, and the upper surface of the lower printed layer can be melted; meanwhile, raw materials flowing out of an upper feeding hole and raw materials flowing out of a lower feeding hole are converged in a discharging hole, the raw materials flowing out of the lower feeding hole are distributed uniformly on the peripheries of the raw materials flowing out of the upper feeding hole for a wrapping purpose, and then the raw materials flow out of a third channel to make contact with the lower printed layer, so that the raw materials flowing out of the upper feeding hole, and the lower printed layer are naturally fused into a whole; and an obvious junction surface between an upper printed layer and the lower printed layer does not exist, and junction between the adjacent printed layers are firmer.

The invention relates to the technical field of metal injection molding, in particular to a preparation method for an efficient environment-friendly metal injection molding feed. The preparation method comprises the following step I of preparing adhesive comprising the following components by weight: 65-85 parts of PEG, 15-25 parts of paraffin, 1-5 parts of propping agents and 2-10 parts of toughening agents; the step II of performing vacuum drying for different processing aids, such as the PEG and the paraffin, and drying in a constant-temperature vacuum drying oven at 60 DEG C for 3-6 hours;and the step III of adding the dried raw materials to a constant-temperature mixing mill, starting stirring at the speed of 10-15 revolutions per minute, starting heating at the same time, and setting the temperature to be 180 DEG C-190 DEG C. The method for preparing the metal injection molding feed is safer, more environmentally friendly and more efficient; on the premise of ensuring that the fluidity and the molding performance of the metal feed are not changed, the degreasing time and the sintering time are shortened, and the energy consumption is reduced; and the environmental pollutionis reduced.

The invention relates to a preparation method of special-shaped polymer structure reinforcing composite light-weight cement, relating to a preparation method of composite light-weight cement and aiming at obtaining a light-weight high-strength cement building material. The preparation method comprises the following steps of 1, preparing a special-shaped polymer structure; 2, preparing cement slurry; 3, forming a light-weight cement composite material. The preparation method disclosed by the invention improves the reinforcing mechanism of the cement-based composite material from the independent reinforcement of a discontinuous reinforcement phase into the synergetic enhancement of a continuous reinforcement phase by substituting a continuous polymer special-shaped structure network for a discontinuous polymer fiber, thereby effectively enhancing the usage property of the cement-based composite material. The preparation method disclosed by the invention effectively reduces the weight of the material by 40%-50%, does not change the flowing property of the cement slurry, can be used for freely designing the structure of the reinforcement phases and integrally forming the composite material and a prefabricated structure, has the advantages of simple preparation process, low cost, high designability of a technical process, abundance in used raw material and the like and can effectively reduce the weight of the cement building material.

The invention proposes a three-dimensional printing head with smooth feeding, which breaks through the structural form of the traditional three-dimensional printing head. The heating layer further heats the raw materials in the outer conveying pipe, so that the temperature and fluidity of the raw materials in the outer conveying pipe are higher than those in the inner conveying pipe. The temperature and fluidity of the raw material in the tube. During the printing process, the lower inclined surface of the flexible heating block contacts the slightly cooled and solidified printing layer of the lower layer, which can melt the upper surface of the lower printing layer. At the same time, the raw material flowing out of the upper feeding hole and the The raw materials flowing out of the lower feeding hole meet in the lower feeding hole, and the raw materials flowing out of the lower feeding hole will be evenly distributed around the raw materials flowing out of the upper feeding hole for wrapping, and then flow out from the third channel to contact the lower printing layer, making the upper printing layer The raw materials flowing out of the feed hole and the lower printing layer are naturally integrated into one, so that there is no obvious joint surface between the upper printing layer and the lower printing layer, and the joint between adjacent printing layers is stronger.

The invention provides an organosilicone-free gel-like thermal conduction composition, and relates to the field of thermal conduction interface materials. The invention in particular relates to organosilicone-free thermal conduction gel which is applied in electronic products and communication equipment and is used for heat conduction of contact interfaces of heating elements and cooling fins. Thethermal conduction gel is prepared from organosilicone-free base oil, dry oil, heat conduction filler, a thixotropic agent and additives. The thermal conduction gel has the advantages of extrudable dispensing, high thermal conductivity, excellent shape retention capability and no organic silicon contamination, and can significantly improve the long-term reliability performance of the electronic products at the same time.

The invention relates to a wet granulation technology of urea-formaldehyde resin. The technology comprises the following steps: 1, carrying out primary granulation: pouring urea-formaldehyde resin powder to a granulator, starting first slurry spraying to spray a first slurry to the granulator, allowing a stirring paddle and a granulating knife to be in a rotating state simultaneously, starting second slurry spraying to spray a second slurry to the granulator, and discharging obtained granules, wherein the first slurry is prepared through diluting formaldehyde, urea and urotropine with neutral distilled water, and the second slurry is prepared through diluting formaldehyde, urea and urotropine with neutral distilled water; 2, refining: pouring the granules produced in the granulator to an oscillating granulator, scattering agglomerated granules through the oscillating granulator, and adding zinc stearate powder in the scattering process; and 3, drying the obtained granules, and discharging the dried granules. The technology adopting the above technical scheme guarantees cleanness and no impurities of the granules, and also can guarantee no change of the fluidity of the urea-formaldehyde resin.

The invention relates to a preparation method of special-shaped polymer structure reinforcing composite light-weight cement, relating to a preparation method of composite light-weight cement and aiming at obtaining a light-weight high-strength cement building material. The preparation method comprises the following steps of 1, preparing a special-shaped polymer structure; 2, preparing cement slurry; 3, forming a light-weight cement composite material. The preparation method disclosed by the invention improves the reinforcing mechanism of the cement-based composite material from the independent reinforcement of a discontinuous reinforcement phase into the synergetic enhancement of a continuous reinforcement phase by substituting a continuous polymer special-shaped structure network for a discontinuous polymer fiber, thereby effectively enhancing the usage property of the cement-based composite material. The preparation method disclosed by the invention effectively reduces the weight of the material by 40%-50%, does not change the flowing property of the cement slurry, can be used for freely designing the structure of the reinforcement phases and integrally forming the composite material and a prefabricated structure, has the advantages of simple preparation process, low cost, high designability of a technical process, abundance in used raw material and the like and can effectively reduce the weight of the cement building material.

A C100 high-performance concrete, which is formed by mixing and gelling cementitious materials, sand, stone, water and admixtures. The cementitious materials include cement and admixtures. The amount of cementitious materials added per cubic meter of concrete 500-600kg, of which the cement is 42.5; the admixture has three components of silica fume, fly ash and slag powder, and contains active SiO2 in an amount of 20%-40% of the total weight of the cementitious material, and its specific surface area 1000-1200m2 / kg; the admixture is polycarboxylate high-efficiency water reducer with a dosage of 2% to 5% of the total weight of the cementitious material; the activator is soot and coal with a dosage of 1 to 5% of the total weight of the cementitious material A mixture of gangue fine powder. No special raw materials such as high-grade cement are needed, the production process is simple, and the manufacturing cost is low. While greatly improving the strength of concrete, it also improves the workability and durability of concrete.

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 (3DP) capable of producing firm finished products. Structural forms of traditional 3DPs are broken through, a heating layer is used for further heating raw materials in an outer conveying tube, and the temperature and fluidity of the raw materials in the outer conveying tube are made higher than those of raw materials in an inner conveying tube; in the printing process, the lower bevel of a flexible heating block makes contact with a lower printed layer which is slightly cooled and solidified, and the upper surface of the lower printed layer can be melted; meanwhile, raw materials flowing out of an upper feeding hole and raw materials flowing out of a lower feeding hole are converged in a discharging hole, the raw materials flowing out of the lower feeding hole are distributed uniformly on the peripheries of the raw materials flowing out of the upper feeding hole for a wrapping purpose, and then the raw materials flow out of a third channel to make contact with the lower printed layer, so that the raw materials flowing out of the upper feeding hole, and the lower printed layer are naturally fused into a whole; and an obvious junction surface between an upper printed layer and the lower printed layer does not exist, and junction between the adjacent printed layers are firmer.

The invention discloses a method for dewaxing the peony seed oil by combining surface crystal copolymerization and alcohol extraction. The specific steps are as follows: heating the peony seed oil to 70-90°C until the waxy crystals precipitated at normal temperature are completely dissolved in the peony After soaking in the seed oil, cool down to 50-65°C, then add 0.08-0.15% surfactant by weight of peony seed oil, then slowly lower the temperature under stirring conditions, stop stirring when it reaches 5-8°C, grow crystals, and centrifuge. Take the supernatant oil and set it aside; add absolute ethanol solution to the supernatant oil, transfer it to a separatory funnel and let it stand, separate the liquids, remove the lower layer of oil, repeat the extraction once, remove the lower layer of oil, and finally remove the ethanol solution. The invention combines surfactant with ethanol extraction to obtain dewaxed oil with low viscosity, good fluidity and clear color, which improves the poor dewaxing effect of the traditional dewaxing process and the wax esters in the oil cannot be effectively removed. The incoming grease becomes viscous or even waxy prematurely.

The invention discloses a perfluor polyether oil-based magnetic liquid. The magnetic liquid is composed of bare Fe[3]O[4] magnetic nano-particles, a perfluor polyether carboxylic acid surface active agent and a perfluor polyether oil-based carrier liquid, the ratio of the bare Fe[3]O[4] magnetic nano-particles (g) to the perfluor polyether carboxylic acid surface active agent (ml) is 40:1-1:1, and the ratio of the modified bare Fe[3]O[4] magnetic nano-particles (g) to the perfluor polyether carboxylic acid surface active agent (ml) is 1:20-2:1. 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, and 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, a magnetic liquid of a conventional type can not achieve the effect, and the perfluor polyether oil-based magnetic liquid is particularly suitable for space stations, aeronautics and astronautics and other military industry fields.