38results about How to "Act as a protective layer" patented technology

The invention belongs to the field of functional solid beverage processing, and particularly relates to a Lycium ruthenicum Murr effervescent tablet and a preparation method thereof. The Lycium ruthenicum Murr effervescent tablet comprises the following components: 45-50% of Lycium ruthenicum Murr extractive powder, 25-30% of organic acid, 18-23% of alkali, and 4-5% of PEG6000 or a mixture of PEG6000 and sodium chloride, wherein after the PEG6000 or the mixture of PEG6000 and sodium chloride coats the alkali, the raw materials are uniformly mixed and subjected to tabletting; the organic acid is citric acid or tartaric acid, and the alkali is sodium bicarbonate or sodium carbonate. According to the invention, a small amount of calcium carbonate added during the extraction process of Lycium ruthenicum Murr effective constituents can react with the citric acid in the extracting solution to generate calcium citrate, so that the stability of the Lycium ruthenicum Murr effective constituents is improved; besides, the method of melting at high temperature and coating at low temperature is adopted during the preparation of the PEG coated object, so that the stability of the effervescent tablet is improved.

The invention discloses a modifier for cement concrete and a method for improving the properties of cement concrete. The modifier is silica sol obtained by partial hydrolysis of orthosilicate. The modifying agent can cover the surface of the cement concrete material after it is molded, so as to modify and maintain the cement concrete. The present invention uses a weak acid as a catalyst to partially hydrolyze orthosilicate to form a network-like transparent sol with a small size, which can more easily penetrate into cement, mortar and concrete, and at the same time avoid the destructive effect of strong acid on cement and concrete. The formed protective layer can inhibit the entry and erosion of external corrosive media. The preparation process of the sol is simple, the composition of raw materials is small, the operation is convenient, the cost is low, and the effect is remarkable. It can be widely used in the modification of cement, mortar and concrete materials, and has important significance for the early prevention and later maintenance of cement, mortar and concrete. .

The invention discloses an anti-impact and abrasion hydraulic surface protection block body and a preparation method thereof. The hydraulic surface protection block body comprises a concrete block body and a geopolymer layer covering the surface of the concrete block body, and an adhesive is arranged between the geopolymer layer and the concrete block body. The geopolymer layer is formed by bonding a geopolymer on the concrete block body of the hydraulic surface protection block body by an adhesive through a form of coating. According to the anti-impact and abrasion hydraulic surface protection block body, the anti-wear property of the surface protecting block body is good, and erosion of a water flow to the block body is effectively reduced; the coating is used for replacing a common concrete surface, so that strength of the surface layer of the surface protection block body can be enhanced, and the service life of the surface protection block body is prolonged; the coating material is prepared from a plurality of industrial wastes, so that cost for additionally arranging block protection layers is saved; and the preparation method is simple and is high in safety.

The invention discloses an air spring formulation for an automobile, which is characterized by comprising the following compositions by mass portion: a, the formulation of inner and outer layer rubberof the air spring: 50 to 100 portions of neoprene, 50 to 100 portions of natural rubber, 0.5 to 5 portions of magnesia, 0.5 to 3 portions of stearic acid and 0.5 to 2.5 portions of antiaging agent OD, and b, the formulation of cord fabric rubber of the air spring: 50 to 100 portions of the natural rubber, 0.5 to 2 portions of the stearic acid, 2 to 5 portions of zinc oxide, 0.5 to 3 portions of antiaging agent RD, 0.5 to 2.5 portions of antiaging agent 4020 and 2 to 4 portions of tackifying resin A-90. The air spring manufactured by the formulation can meet the following key technical points:1, the outer layer rubber has excellent ozone aging resistant property, thermal oxygen aging resistant property and flexing cracking resistant property; 2, the cord fabric rubber is closely adhered with nylon cord fabric, and the rubber has excellent thermal oxygen aging resistant property; 3, the layers are closely adhered; 4, the airtightness is excellent; and 5, the service life is long.

The invention discloses a negative temperature coefficient thermistor with a nano particle film, and a preparation method thereof. The thermistor comprises a ceramic substrate, a copper electrode layer formed by sputtering and arranged on the ceramic substrate, a protective layer at the outside of the ceramic substrate and a pin on a lower end of the protective layer, and the protective layer is stacked on the surface of the copper electrode layer; and the protective layer is formed by a nano alumina film. The preparation method comprises the following steps: (1) cleaning the ceramic substrate, and drying the same; (2) sputtering copper on the surface of the ceramic substrate in a magnetron sputtering manner to form the copper electrode layer; and (3) after the pin is connected to the copper electrode, sputtering a layer of nano aluminum film on the surface of the copper electrode layer in the magnetron sputtering manner, and performing sintering in a weak oxidizing atmosphere to formthe nano alumina film. According to the negative temperature coefficient thermistor disclosed by the invention, the copper is used as the electrode layer, the nano aluminum and copper form a solid solution alloy, thereby enhancing the bonding strength of the electrode layer and the nano aluminum, and the sintering is performed in the weak oxidizing atmosphere at a low vacuum degree, so that the surface of the nano aluminum is oxidized to form a layer of dense alumina film so as to function as a protective layer.

The invention relates to the technical field of lithium batteries, in particular to a quaternary positive electrode material and a preparation method and application thereof. The preparation method of the quaternary positive electrode material comprises the following steps: mixing the positive electrode substrate, the soluble cobalt salt, the precipitating agent, the complexing agent and water, separating the liquid from the solid in the mixed system, collecting the solid phase, drying and calcining; The general chemical formula of the positive electrode substrate is LiNi x co y mn z al (1‑x‑y‑z) o 2 , wherein, 0.9≤x<1, 0<y<0.07, 0<z<0.03. In the present invention, the positive electrode base material is washed and coated, and a layer of cobalt compound is evenly coated on the surface to improve the conductivity of the material and play the role of a protective layer, reducing the occurrence of side reactions between the positive electrode material and the electrolyte; at the same time, the precipitation The agent can settle down the remaining lithium source, prevent the jelly-like situation due to the high pH in the later homogenization process, and affect the capacity of the positive electrode material and the cycle retention rate.

The invention provides a method for activating dopant atoms, which includes steps of making a polycrystalline silicon grid on a silicon base of a silicon chip, performing low-concentration ion implantation of boron atoms to the upper surface of the silicon chip to form a P+ type silicon substrate on the silicon base on two sides of the polycrystalline silicon grid, making side walls consisting of silicon nitride on two sides of the polycrystalline silicon grid, performing source electrode and drain electrode ion implantation on the P+ type silicon substrate on the outer sides of the side walls on two sides of the polycrystalline silicon grid to form a source electrode and a drain electrode, processing the upper surface of the silicon chip by plasmas of nitrogen-enriched gas to form saturated and stable silicon-nitrogen bond compound on bare surfaces of the source electrode, the drain electrode, the outer sides of the side walls and the top of the polycrystalline silicon grid, depositing silicified retaining layers on the bare surfaces of the source electrode, the drain electrode, the outer sides of the side walls and the top of the polycrystalline silicon grid of the silicon chip, and annealing the silicon chip. The method can effectively increase proportion of activated boron atoms.

The invention discloses a manufacturing method for an automobile sign capable of realizing a radar active cruise function. The manufacturing method includes obtaining a transparent plastic sign by means of manufacturing transparent polycarbonate plastics into a cambered panel with the thickness ranging from 5mm to 6mm by the aid of an injection molding machine; obtaining a transparent plastic sign with a metallic impression and a protecting layer by the aid of UV (ultraviolet) spraying materials; obtaining an indium-plated plastic sign by means of forming an indium metal film on the transparent plastic sign by an ion sputtering method; forming a seamless automobile sign finished product with uniform wall thickness ranging from 7cm to 8cm by means of assembling the indium-plated plastic sign with a plastic base; and finally detecting attenuation and obtaining the qualified automobile sign with the attenuation lower than 2.0DB (decibel) and the capability of realizing the radar active cruise function. The automobile sign has the advantages that the automobile sign has metallic luster, is penetrable by radar microwaves, can realize a function of radar measurement for front and rear automobile distances and the active cruise function, has an appearance decoration function and can meet safety requirements.

The invention provides a banana interplanting method suitable for the Zhangzhou area. It selects Zhangzhou local variety "Tianbao dwarf banana" and the disease-resistant variety "Nantianhuang" for interplanting, and transplants and plants Tianbao dwarf banana in the field in May every year. Cultivate cup seedlings, and then plant Nantianhuang seedlings at 1 / 3 of the distance between two Tianbao bananas in February of the following year, and cut off 1 / 2 of the stems after Tianbao dwarf bananas are harvested, and then The ripe fruits of Nantianhuang will be harvested from March to April of the next year, and then planted in cycles. The interplanting method of the present invention can not only effectively avoid the damage of typhoon and frost, but also allow different banana varieties to be rotated, so that the varieties with longer growth period can also be "harvested once a year", which can increase the economic income of banana farmers, Improve the utilization rate and output rate of land.

The invention relates to the composition and preparation method of a semi-solid electrode with high solid content and a lithium slurry flow battery thereof. The electrode is composed of an active material, a conductive agent, a nanostructured dispersant grafted with a polar alkyl chain on the surface, an electrolyte composition, and a current collector. It is characterized in that the mass ratio of the active material particles in the semi-solid electrode can be up to 90% of the slurry system, and the dispersant and conductive agent are jointly adsorbed on the surface of the active material particles, on the one hand, it reduces the direct contact between the active material and the electrolyte, reduces the possibility of side reactions, and improves the coulombic efficiency of the battery; On the other hand, the nanostructured dispersant effectively reduces the viscosity and shear strength of the semi-solid electrode, so the electrode has better fluidity under the same solid content, which is beneficial to reduce the power consumption during the flow process of the slurry flow battery electrode . The electrode is used in a lithium slurry flow battery, which can improve the first Coulombic efficiency and energy density of the battery, and is conducive to the long-term and stable cycle of the battery.