50results about How to "Not easy to oxidize and corrode" patented technology

The invention discloses a cement-based wood fiber artificial board and a manufacturing method thereof. According to the invention, the cement-based wood fiber artificial board is obtained by taking cement as a gel material and taking wood fibers as an organic reinforcing material, doping a certain amount of chemical addition agent, and carrying out steps of batching, agitating, pressurizing, curing, de-molding and maintaining. The artificial board provided by the invention is a novel material with water resistance, anti-oxidation, corrosion resistance and flame retardant property. The wood fiber raw material is selected from leftovers in the production of solid wood furniture and is mixed with cement slurry after being classified, machined and treated, so that the cost of the cement-based wood fiber artificial board is low; and bonding glue is not used so that the pollution to the environment is reduced while timber resources are protected and saved. The cement-based wood fiber artificial board and the manufacturing method thereof, provided by the invention, are applicable to lightweight wall materials for buildings, indoor and outdoor decorative sheet materials, and furniture decorative sheet materials.

The invention provides a generation method for a self-adaptive sliding mode controller of an uncertainty plane inverted pendulum system. The generation method comprises the steps that step 1, the sliding mode control law is generated for a linear time-invariant system with uncertainty items; and step 2, fuzzy system h<^> approximation switching control epsilonsgn(s) is adopted for the uncertainty items. The beneficial effects of the generation method are listed as follows: the self-adaptive fuzzy sliding mode controller is designed for the inverted pendulum system with the uncertainty items, the uncertainty inverted pendulum system is theoretically proved to be stable, and the designed control system is verified to be great in rapidity and robustness through simulation experiment.

The invention relates to the technical field of preparation of electronic components and devices and particularly relates to a method for preparing BCZT-based leadless piezoelectric ceramics. The method comprises the steps of dissolving citric acid in ethylene glycol, adding anhydrous ethanol diluted butyl titanate to obtain a compounding solution, dropwise adding a barium acetate solution, a calcium nitrate solution and a zirconium nitrate solution into the compounding solution, carrying out uniform mixing so as to obtain a BCZT-based polymer precursor, mixing NdFeB nano-powder with ferrum nano-powder so as to obtain magnetic powder slurry, mixing hard magnetic powder and core-shell structured ferrum/cobalt nano powder, then, carrying out high-speed dispersing treatment, and carrying outmold loading, spark plasma sintering and demolding, thereby obtaining the piezoelectric ceramics. Dense cobalt powder particles can be used for protecting ferrous powder from oxidation, tetrabutyl titanate reacts with citric acid to form a network structure, zirconium-calcium-barium titanate based materials are free of Pb and have little harm to human and environment, elemental cobalt will be slightly softened at high temperature, thus, the binding power of magnetic materials is enhanced, the coefficient of thermal conductivity of the magnetic materials is reduced, the magnetic materials can stably work in high-temperature environments, and the application prospect is broad.

The invention discloses an electric dry oven for a Chinese herbal medicine. The electric dry oven comprises a box body, a door and a temperature controller, wherein a hot air chamber consisting of heat insulation plates and an insulation plate is arranged in the middle in the box body; an air blower is arranged on the top of the hot air chamber; air outlets are uniformly formed on the heat insulation plates on the left side and the right side of the hot air chamber; and the insulation plate is provided with a plurality of electrothermal tubes from top to bottom. By the electric dry oven, the shortcomings of one-directional heat cycle, non-uniform heating range and non-uniform drying degree in the prior art are overcome; and the electric dry oven has the characteristics of low energy consumption, low cost, high efficiency and convenience for maintenance and regulation.

The invention discloses a wafer-level chip packaging structure. The wafer-level chip packaging structure comprises an image sensing chip and a transparent cover plate, wherein metal conductive pattern layers electrically connected with pin bonding pads are arranged on the surface, with the back towards the image sensing chip, of a passivation layer and blind holes respectively. Each supporting cofferdam is composed of a first supporting cofferdam layer and a second supporting cofferdam layer which are placed in a vertically stacked mode, a plurality of continuously arranged V-shaped notched are formed in the inner side face of each second supporting cofferdam layer, arc-shaped notches are formed in the four corners of each second supporting cofferdam layer respectively, a plurality of holes are evenly formed in the surface, in contact with the image sensing chip, of each supporting cofferdam, each metal conductive pattern layer is formed by placing a titanium layer, a copper layer, a nickel layer and a palladium layer in a stacked mode in sequence, and the titanium layers are in contact with the passivation layer. According to the wafer-level chip packaging structure, stress is relieved, the structure is not prone to oxidation corrosion, the response time of a device is shortened, the reliability of a product is improved, and the requirement for continuously covering the inner wall of a deep hole with a high aspect ration with a metal layer can be met.

The invention discloses a semiconductor device of a novel package structure. The semiconductor device comprises an image sensing chip and a transparent cover plate. A metal conductive pattern layer which is electrically connected with a pin bonding pad is arranged in a blind hole and on the surface, opposite to the image sensing chip, of a passivating layer. A supporting cofferdam is composed of a first supporting cofferdam layer and a second supporting cofferdam layer which are overlapped up and down. The first supporting cofferdam layer is in contact with the transparent cover plate. The second supporting cofferdam layer is in contact with the image sensing chip. A plurality of V-shaped continuous notches are formed in the inner side face of the second supporting cofferdam layer. Arc notches are formed in the four corners of the second supporting cofferdam layer respectively. The metal conductive pattern layer is formed by sequentially overlapping a titanium layer, a copper layer, a nickel layer and a palladium layer. The titanium layer and the passivating layer are in contact. The semiconductor device relieves stress, is exposed in the environment, and can not be easily oxidized and corroded, stress deformation of metal on the two sides of the blind hole under the cold and hot environments is effectively buffered, the response time of the semiconductor device is shortened, and the requirement that the metal layer continuously covers the inner wall of the deep hole with a high aspect ratio is met.

The invention provides a cloud computing access gateway. A user can transfer data to a new cloud service provider via an original application account between that the service period is ended and that the application account of the user is destroyed. The user data can be transferred from a cloud source database to a target database rapidly and timely via the cloud computing access gateway. According to the invention, the user can select different cloud service providers freely and rapidly, historical data of the original cloud service provider can be provided for the new cloud service provider directly and rapidly, and rapid and convenient cloud access and storage services are provided for the user.

The invention provides a coating process for improving performance of a reflection cup. The coating process for improving the performance of the reflection cup comprises the following steps that step1, a workpiece is placed in a processing furnace cavity, after vacuumizing is carried out, the processing furnace cavity is filled with argon gas, and the surface of the workpiece is cleaned by ion current bombardment; step 2, the workpiece is coated with a dimethyl silicone oil base film under the condition of ion current bombardment by a chemical vapor deposition method; step 3, the workpiece iscoated with an aluminum film by an evaporation mode, and the workpiece is subjected to evaporation by pure aluminum at a high temperature of 1100-1200 DEG C, wherein the purity of the pure aluminum is 99.99 %; and step 4, the workpiece is coated with a dimethyl silicone oil protective film under the condition of ion current bombardment by a chemical vapor deposition method. The coating process for improving the performance of the reflection cup has high light efficiency, high film layer stability, less material consumption and reduced cost.

The invention relates to a 5G filter cover plate 6M61 aluminum alloy base material. The 5G filter cover plate 6M61 aluminum alloy base material comprises following components including, by weight percent, 0.50%-0.65% of Si, smaller than or equal to 0.30% of Fe, 0.15%-0.25% of Cu, smaller than or equal to 0.10% of Mn, 0.90%-1.10% of Mg, 0.15%-0.25% of Cr, smaller than or equal to 0.10% of Zn, 0.002%-0.035% of Ti, AL and other inevitable elements, the content of other inevitable single elements is smaller than or equal to 0.05%, and the sum is smaller than or equal to 0.15%. After the above element mixtures are smelted and cast in a smelting furnace into an aluminum alloy ingot, uniform thermalization treatment is conducted, hot rolling and cold rolling are conducted to intermediate annealing, repeated cold rolling is conducted, stretch bending straightening cleaning and plate form stretching straightening are conducted, and then an aluminum alloy plate meeting the requirement is manufactured. The aluminum alloy plate prepared through the technology has good machining performance and oxidation performance, and the 5G filter cover plate 6M61 aluminum alloy base material is suitable for machining during filter cover plate production.

The invention relates to the technical field of preparation of rare earth permanent magnet materials, in particular to a preparation method of an anti-corrosion rare earth permanent magnet material. According to the preparation method, after alkalization of a sodium borohydride solution, the sodium borohydride solution is mixed with a ferrous sulfate solution, and nanometer iron powder is obtainedafter treating and is dispersed in cyclohexane; the alkalized sodium borohydride solution is added in; iron/cobalt nanometer powder of a core-shell structure is obtained through treating; the nanometer NdFeB powder and the nanometer iron powder are mixed according to proportion, and dispersion media and surface active substances are added in; magnetic powder slurry is obtained through ball-milling; the magnetic powder slurry is treated, and hard magnetic powder is obtained; after the magnetic powder slurry is mixed with the iron/cobalt nanometer powder of the core-shell structure, treating isperformed, and the rare earth permanent magnet material is obtained; under the high temperature work condition, the iron powder can be protected against oxidization by cobalt, the anti-corrosion performance of the permanent magnet material is improved; under the high temperature work condition, the expanding coefficient of the NdFeB powder is small, the saturation magnetic flux density is improved, the Curie temperature of the NdFeB powder is increased, and therefore the work temperature of the rare earth permanent magnet material rises, and the application prospects are wide.

The invention provides a woodworking tool for reducing the friction coefficient during cutting of the woodworking tool and a manufacturing method of the woodworking tool. The woodworking tool comprises a tool body. The tool body comprises a front tool face and a rear tool face. An inclined cutting edge is formed between the front tool face and the rear tool face. A microstructure texture is formed at the position, close to the cutting edge, of the front tool face. The manufacturing method comprises the step that the microstructure texture is generated at the position, close to the cutting edge, of the front tool face of the woodworking tool through a laser or tiny abrasive particle jetting or a micro-electronic mechanical system method.

The invention discloses a detachable chassis fuel tank structure. The detachable chassis fuel tank structure comprises a chassis fuel tank body and a rectangular chassis frame used for mounting the chassis fuel tank body, wherein protection side plates are arranged at the periphery of the rectangular chassis frame, a chassis protection plate is arranged on the lower end face of the rectangular chassis frame, a handle convenient for carrying the chassis fuel tank body is fixedly arranged on the upper end face of the chassis fuel tank body, a fuel tank fixing plate corresponding to the handle is mounted on the protection side plate of the rectangular chassis frame by virtue of bolts, the chassis fuel tank body is placed on the chassis protection plate in the rectangular chassis frame and is fixed by virtue of the fuel tank fixing plated clamped on the handle, and thus the chassis fuel tank body is avoided from shaking in the rectangular chassis frame. The detachable chassis fuel tank structure is convenient for disassembly, maintenance and cleaning, and the protection plate is arranged at the periphery, so that oxidation corrosion is hardly caused.

The invention discloses a production process of a diatom formaldehyde-removing environment-friendly board, and relates to the field of diatom formaldehyde-removing environment-friendly boards, the diatom formaldehyde-removing environment-friendly board comprises an upper-layer board, a diatomite board and a lower-layer board which are arranged from top to bottom, and the production process of the diatom formaldehyde-removing environment-friendly board comprises the following steps of S1, raw material preparation, S2, surface processing, and S3, surface treatment. The method comprises the following steps of S1, primary slotting machining, S4, hot pressing and fixing, S5, secondary slotting machining and S6, follow-up treatment. When the upper-layer wood board or the lower-layer wood board is attached to the position, located on one side of the cutting frame body, of the surface of the second pressing plate, the upper-layer wood board and the lower-layer wood board can be pushed to move along the surface of the second pressing plate through a pushing mechanism, and therefore an upper deformation groove and a lower deformation groove are formed in the surface of the upper-layer wood board and the surface of the lower-layer wood board correspondingly.

The invention discloses a novel high-strength furniture board, which is prepared from the following raw materials in parts by weight: 100-150 parts of wood fibers, 100-200 parts of ordinary Portland cement, 70-80 parts of PVC resin powder, 20-30 parts of light calcium carbonate, 5-10 parts of a concrete waterproofing agent, 5-10 parts of a wood adhesive, 1-3 parts of an antibacterial agent, 1-3 parts of an antioxidant, 0.5-1.5 parts of PE wax and 0.5-1.5 parts of stearic acid. The preparation method comprises the following steps: (1) weighing the raw materials; (2) mixing the raw materials, adding 200-300 parts of water, and uniformly mixing; and (3) pouring the mixture into a mold, and then heating, extruding and molding by mold equipment to obtain the novel high-strength furniture board. The novel high-strength furniture board has the advantages of being high in strength, firm in structure, excellent in water resistance, excellent in flame retardant property, not prone to oxidation corrosion and the like, is free of formaldehyde and pollution and long in service life, and is an environment-friendly product.