88results about How to "Improve surface compactness" patented technology

The invention discloses a zirconium cladding surface resistant to high temperature and oxidation ZrCrFe/AlCrFeTiZr composite gradient coating preparing technology. Ultrahigh vacuum multitarget co-sputtering technique is adopted, a ZrCrFe/AlCrFeTiZr composite gradient alloy resistant to high temperature and oxidation protecting coating is prepared on the surface of a zirconium alloy base body, and the zirconium cladding surface resistant to high temperature and oxidation ZrCrFe/AlCrFeTiZr composite gradient coating preparing technology comprises the steps of predepositional treatment, bias voltage anti-splash washing and ZrCrFe/AlCrFeTiZr composite gradient alloy coating deposition. The preparing process of the composite coating is divided into two steps, the first step is to prepare ZrCrFe gradient transition layer coating, in a deposited ZrCrFe transition layer, the atomic percentage content of Zr element is changed from the gradient of 100 at%-35 at% in the thickness direction, the atomic percentage content of Cr element is changed from the gradient of 0 at%-33 at% in the thickness direction, and the atomic percentage content of Fe element is changed from the gradient of 0 at%-33 at% in the thickness direction; the second step is to prepare a AlCrFeTiZr high-entropy alloy coating, in a deposited AlCrFeTiZr high-entropy alloy coating, the atomic percentage content of Al element is controlled in 0.5 at%-1.0at %, and the atomic percentage of other elements is between 10 at%-35 at%. Bonding force of the coating prepared by the technology is excellent, the surface is dense and uniform, and the coating has excellent performance such as high strength, resistance to high temperature and oxidation and irradiation resistance.

The invention relates to a penetration type transparent concrete protection paint and preparation method thereof, which comprises the following steps: diluting a fluoropolymer by diluents, adding a curing agent, mixing as the first component, and then adding silane which is used as the second component, mixing uniformly; the product is coated on the concrete surface and penetrates into the concrete for combining into one body, thereby forming a deep protection, effectively reducing water absorption of concrete, increasing packing of concrete surface, improving resistance to chemical corrosion, resistance to carbonization and resistance to frost, especially blocking the channel by which the extraneous moisture can enter into the internal part of the concrete, substantially improving waterproofness of the concrete, and effectively prolonging the service life.

The invention discloses a ceramic coating with high-temperature resistance and wear resistance. The ceramic coating is prepared from components in parts by weight as follows: aluminum oxide, silicon oxide, silicon carbide, silicon nitride, boron carbide, titanium carbide, magnesium oxide, zinc oxide, calcium oxide, a binder, a stabilizer and a thickener; the preparation method comprises steps as follows: aluminum oxide, silicon oxide, silicon carbide, silicon nitride, boron carbide, titanium carbide, magnesium oxide, zinc oxide and calcium oxide are subjected to ball milling respectively, then dried, sintered, ground, sieved and mixed, and mixed powder is prepared; the binder, the stabilizer, a defoaming agent and the thickener are added to the mixed powder and mixed uniformly. The ceramic coating has the advantages that the prepared coating has high high-temperature resistance and wear resistance, good surface compactness and high bonding capability; besides, the prepared coating is applied to the surface of equipment, so that the hardness and the surface compactness of the coating are increased after the equipment runs for a period of time, and the bonding property of the coating with a metal matrix is enhanced; besides, materials used during preparation are simple, and site operation is convenient.

The invention relates to a treatment method of improving oxidation resistance of a thermal barrier coating, belonging to the technical field of thermal barrier coating surface treatment and modification. High current pulse electron beam irradiation is utilized to realize electron beam physical vapor deposition to prepare a yttrium oxide stabilizing zirconium oxide thermal barrier coating to cap ceramic layer columnar crystals, thus the heat-shielding performance and the high temperature oxidation resistance of the coating are improved. The process conditions are shown as follows: the vacuum is 3.5*10<-2>Pa, the voltage is 15kV, the frequency is 1Hz, the pulse width is 120-150ms, the energy density is 10J/cm<2>-20J/cm<2>, the pulse time is 30-40 and the remelting layer thickness reaches at least 10 micrometers. The invention has the advantages that the electron beam physical vapor deposition layer columnar crystals are capped after the high current pulse electron beam irradiation is ended, and thus, the surface of the thermal barrier coating becomes smooth, no penetrable microcracks are generated, the oxygen element diffusion is effectively stopped, the growth of a thermal growth oxidation layer is relieved and the heat-shielding performance and the high temperature oxidation resistance of the thermal barrier coating are obviously improved.

The invention relates to the fields of manufacturing and application of heat-resistant, heat-insulating, flame-retardant and high-temperature expansion materials, specifically to a hydrogel with fireproof and cooling functions and a preparation method thereof. The hydrogel comprises the following components in parts by mass: 0.05-20 parts of a hydrogel thickening agent, 5-35 parts of a freezing point depressant, 1-30 parts of an expanded foam material, 1-15 parts of an expanded flame retardant, 0.01-1 part of a foaming agent, 1-15 parts of a gas generating agent and 0.01-1 part of a bactericide. The hydrogel provided by the invention has the following innovations: when the hydrogel directly acts on the surface of a comburent, the hydrogel can be adhered to the surface of the comburent; meanwhile, foams can be generated on the surface of the comburent and contain water, so the water can be sealed in the foams to continuously exert cooling and fire extinguishing effects; after the wateris dried, an expansion flame-retardant layer can be formed to provide continuous heat-insulation and flame-retardant functions; and the functions of fire extinguishing, cooling, heat insulation and fire reburning prevention are achieved.

The invention relates to the technical field of waterproof coatings, and provides an organic silicon modified waterborne polyurethane waterproof coating, which is prepared from the following raw materials in parts by mass: 100 parts of polyhydric alcohols and polyisocyanates; 4-6 parts of a hydrophilic chain extender; 3-7 parts of a post-chain extender; 0.05 to 0.3 part of a neutralizing agent; 0.1 to 1.0 part of a neutralizing agent; 1.5 to 2 parts of a KH-550 coupling agent, 10 to 25 parts of an auxiliary agent, 20 to 50 parts of a filling material, and 25 to 40 parts of water; the present invention defines the isocyanate index during dosing, and defines the composition of the polyols. When the addition amount of the KH-550 coupling agent is 1.8%, the organosilicon modified waterborne polyurethane waterproof coating provided by the invention can ensure that the water absorption rate of an adhesive film is 4.7% under the condition of ensuring emulsion stability, and has excellent water resistance, stain resistance, mechanical properties, weather resistance, waterproofness, wear resistance and corrosion resistance.

The invention relates to the technical field of tunnel lining curing and provides a tunnel lining concrete curing construction process. According to the process, a tunnel lining is axially divided into multiple to-be-cured segments, each to-be-cured segment is divided into multiple to-be-cured areas, curing operation including monitoring the temperature and the humidity of each to-be-cured area is performed on all the to-be-cured segments one by one, and each to-be-cured area is subjected to spraying treatment and thermal radiation treatment to enable the temperature and the humidity of each to-be-cured area to conform to a set temperature variation curve and a set humidity variation curve. The curing process can realize intelligent control on temperature and humidity, two curing ways of heating and humidifying are independent from each other, temperature curing conditions and humidity curing conditions do not affect each other, and accordingly accurate control on the temperature and humidity of each area is realized according to different demands of different areas, and tunnel lining quality, concrete strength and surface compactness can be improved significantly.

The invention provides a nano barrier film and a preparation method thereof. The nano barrier film is sequentially provided with an aluminizing base film layer , a bottom coating layer, a barrier coating layer and a nano clad layer from bottom to top. The bottom coating layer refers to acrylate or polyurethane coating, and the solid content is 30-40%; the barrier coating layer refers to acrylate or polyurethane coating, and the solid content is 50-70%. The invention further provides the preparation method of the nano barrier film, The thickness of the prepared nano barrier film is not significantly increased, the aluminizing base film layer is good in aluminum layer adhesion, excellent in water blocking and air blocking performance, meanwhile the durability of the film is good, and the service life is very long.

The invention provides an antifouling coating material and a preparation method and application thereof, the coating material comprises the following raw materials: PDMS-PUa, PTFE nanoparticles and anorganic solvent A, and the coating material is obtained by mixing and crosslinking PTFE dispersion liquid dispersed in the organic solvent A and PDMS-PUa. The antifouling coating material and an antifouling material prepared from the antifouling coating material disclosed by the invention have relatively good flexibility and fluidity, a glossy surface and a low elastic modulus, The antifouling property is achieved while good mechanical property is guaranteed, certain self-repairing property is achieved, service life of antifouling material can be prolonged, durable and efficient antifouling purpose is achieved, and a wide application prospect is achieved.

A concrete durability protection method is provided, including following steps: Step one: rinsing the concrete surface; Step two: spraying agent A material or alternately spraying agent B material and agent A material at the wet surface of the concrete; Step three: repeating step two. The beneficial effects of the present invention include: nanoscale active silicate penetrates into the concrete surface layer within a certain depth and reacts with free calcium ions within the concrete to form C—S—H crystalline, thereby improving the compactness of the concrete surface layer within a certain depth, repairing defects in the concrete surface layer within a certain depth, such as the capillary interstices, pores, microcracks, etc., so as to effectively improve the durability of concrete. The unreacted nanoscale active silicate material has permanent activity. It could recover its activity when the concrete absorbs moisture, and continue to react with free calcium ions in the concrete to quickly form C—S—H crystals, realizing the permanent concrete durability protection.

The invention relates to a surface dense enhancement concrete heat preservation and moisturizing composite curing method. Nanometer silicon sol and a heat preservation and moisturizing curing film arecombined for concrete curing; in the composite curing method, the particle size range, the spraying using amount and the spraying opportunity of the nanometer silicon sol are defined, and the heat preservation and moisturizing curing film has the specific water storage and release structure characteristics. The surface dense enhancement effect of the nanometer silicon sol and the heat preservation and moisturizing effect of the curing film are combined, the early stage self hydration and heat release characteristics of the cast-in-place concrete structure are fully utilized, concrete surfacedense enhancement is achieved, and the durability of the structure is improved.

The invention discloses a coating and glazing process for inorganic decorative sheets and a preparation method of coatings. The coating and glazing process and the coatings are mainly used for protecting and decorating coatings formed in early coating stage of the inorganic decorative sheets. Compared with traditional spraying, brush coating and roller coating processes, the coating and glazing process has the advantages of high production efficiency, good paint film build, high yield and low coating waste rate; the coatings for the coating and glazing process include a UV spray coating, a water spray coating and a fluorine-modified PU spray coating, and formed coating and glazing paint is good in water resistance, pollution resistance, ageing resistance and scrub resistance.

The invention discloses a ceramic heating element. The ceramic heating element includes a heating body and a heating circuit; the heating body is columnar, and a porous channel is arranged in the heating body; and the heating circuit is arranged on the heating body to heat air passing through the porous channel. The ceramic heating element disclosed by the embodiment of the invention can increasethe contact area between the heating body and the air, and realize sufficient heating of the air, which not only has high heating efficiency and high thermal conductivity, and realizes energy saving and power saving, but also has good compactness and does not adsorb smoke particles, thereby having no abnormal odor. The invention also discloses a non-contact electronic cigarette heater with the ceramic heating element.