32results about How to "Made low" patented technology

The invention discloses a preparation method of a direct methanol fuel cell anode catalyst, and belongs to the technical field of electrocatalysis and energy. The method comprises the following steps: firstly preparing polyethyleneimine (PEI) functionalized graphene, then mixing H2PtCl6, CuCl2 and PEI functionalized graphene according to a certain mass ratio, dispersing in secondary water by ultrasonic, performing in-situ reduction of H2PtCl6 and CuCl2 by sodium borohydride under a room temperature condition so as to prepare a PtCu two-component nanoparticle/graphene catalyst (PtCu/graphene). The PtCu two-component nanoparticles (PtCuNPs) prepared by the method of the invention are uniformly dispersed on PEI functionalized graphene, and the particle size of the PtCu alloy nanoparticles is about 4-6 nm. Electrochemical experiment results show that the PtCu/graphene catalyst has excellent electrocatalytic activity for methanol oxidation; and the method is simple in operation, is mild and controllable in experiment conditions, and has extensive application prospects.

The invention relates to a mahjong tile cleaning machine which comprises a frame, a casing, a rotary drum, a drum door, a water spraying pipe, a brush, a gear driving mechanism and a drum door driving mechanism. The rotary drum is supported on the frame rotatably and driven by the gear driving mechanism, a tile feeding and discharging port is formed in the circumference of the rotary drum, the drum door is arranged on the rotary drum rotatably and driven by the drum door driving mechanism, and the tile feeding and discharging port in the rotary drum is opened or closed by means of the rotation of the drum door relative to the rotary drum. The brush is arranged in the center of the rotary drum, the water spraying pipe is arranged on one side outside the rotary drum, the casing is arranged on the frame, and the rotary drum is covered with the casing. The mahjong tile cleaning machine has the advantages that tiles can go in and out of the rotary drum easily, the tile feeding and discharging port can be opened and closed automatically, dirt on the tiles can be cleaned away completely due to double action of friction of the brush and jet of the water spraying pipe, and the mahjong tile cleaning machine has an automatic drying function and is high in automation degree and efficiency and capable of saving time and labor.

An objective of the present invention is to provide a ceramic heater making it possible to prevent a short circuit in its resistance heating element and heat a semiconductor wafer evenly. The ceramic heater of the present invention is a ceramic heater comprising: a ceramic substrate; an insulating layer having volume resistivity higher than that of said ceramic substrate, being formed on at least a part of said ceramic substrate; and a resistance heating element formed on said insulating layer.

The invention relates to a preparation method of a fiber pipe with a pattern or a letter on the surface. The preparation method comprises the following steps of: 1) winding fiber prepreg on a core mold to form a pipe blank, 2) printing reverse pattern or letter ink on one side of a plastic film, 3) winding the plastic film on the pipe blank to replace a release belt to size the pipe blank, or winding in an incomplete covering or partial overlying manner, then winding the release belt for sizing, 4) placing the wound pipe blank in a curing oven for baking for 1-3h at 110-175 DEG C to allow the pattern or letter ink on the plastic film and phenolic resin or epoxy resin of the pipe blank to be immersed mutually, solidified and formed, and 5) removing the mold, and stripping the plastic film to obtain the finish product. The preparation method has the advantages that the pattern is not easy to separate and damage, paint polishing or paint spraying is not required during preparation, the preparation technology is simple, the time, labor and raw materials are saved, and the manufacturing cost is low.

A one-piece frame adaptable for use with any display object, regardless of the dimension, shape or material. The frame also provides increased durability and resistance to wear, as well as lower costs and ease to make. Methods for making such frame are also provided.

The invention discloses an assembling-welding auxiliary jig for an L2-S type part and a welding method thereof. The assembling-welding auxiliary jig comprises a substrate (2), a base plate (3) and twolimiting steel pipes (4); the substrate (2) is provided with an assembling hole (21) and two installing holes (22), the assembling hole (21) is in a U shape, and the distance between the two installing holes (22) is equal to the distance between the two ends of a U-shaped opening of a U-shaped part (11); the base plate (3) is fixedly installed on the lower surface of the substrate (2), and the lower end of the assembling hole (21) and the lower ends of the two installing holes (22) are blocked; and the two limiting steel pipes (4) are installed in the two installing holes (22) correspondingly. The installing welding method is suitable for the assembling-welding auxiliary jig. The assembling-welding auxiliary jig has the advantages of being simple in structure, reasonable in design, convenient to use, low in manufacturing cost, good in assembling-welding precision, high in working efficiency and the like.

The invention discloses a foam type conductive colloidal skin-friendly dressing as well as a preparation method and application thereof, and relates to the technical field of conductive materials. The foam type conductive colloidal skin-friendly dressing is prepared from the following raw materials in parts by weight: 1 to 10 parts of polyvinyl alcohol, 1 to 10 parts of polyvinylpyrrolidone, 15 to 25 parts of polyethyleneimine, 1 to 5 parts of cross-linking agent, 1 to 5 parts of softener, 1 to 5 parts of stabilizer, 10 to 90 parts of water and 5 to 10 parts of conductive filler. Effective crosslinking is completed through reasonable proportion regulation and control, the skin-friendly foam type conductive adhesive with a pore channel structure is formed, the formed conductive adhesive is small in density and small in resistance, can meet the application requirement of a human body sensor electrode, and is non-toxic to skin, biodegradable and good in biocompatibility. The traditional Chinese medicine composition is free of irritation to skin, low in manufacturing cost and safe to use, and has a good economic effect. The method can be widely applied to preparation of a pipeline sealing anti-leakage agent, flexible medical electronic equipment, a sensor electrode or an auxiliary buffer electrode.

In order to solve the problems that a crystal oscillator piece in a crystal oscillator probe is repeatedly polluted, the crystal oscillator frequency is likely to be unstable, consequently the evaporation capacity of target materials cannot be accurately detected by the crystal oscillator probe, and the coating thickness of a substrate is not uniform, the invention provides a magnetofluid integrated crystal oscillator baffle switching mechanism. Magnetofluid is driven by an air cylinder to rotate, and the magnetofluid is rotated to drive a shielding plate to rotate, so that a shielding piece on the shielding plate is located under a detection hole of one unused crystal oscillator piece, and the frequency of repeated contamination of the crystal oscillator piece is reduced; the shielding piece is rotatably located at the lower end of the detection hole of the polluted crystal oscillator piece, and the unpolluted detection hole is used; the replacement efficiency of the crystal oscillator piece is reduced, and meanwhile the shielding plate is detachably connected with the magnetofluid after being polluted, thereby facilitating replacement; the sealing performance of an evaporator cavity is improved through use of the magnetofluid, and the structure is simple; and the operation is convenient, and the manufacturing cost is low.

A low cost air damper that provides a good seal with low torque requirements. Blade seals of square cross sectional configuration are provided on each damper blade so that the blade seals engage adjacent blades before the blades are fully closed. L-shaped side seals and multiple discs that receive the ends of the blades serve collectively to seal between sides of the damper frame and the blades when the blades are closed even when the blades are not cut precisely. One edge of the L-shaped side seals engages and seals against the discs and the other edge of the side seals laps over and seals against a flat side of the blades and against the square blade seals. A low friction coating is applied to the side seals to further reduce friction.

The invention relates to a device and a method for washing an ultrafine powder material for a ceramic capacitor. The method is characterized by comprising the following steps of: (1) adding the ultrafine powder material into a pre-washing storage tank (1), adding high-purity water, and circulating the material in the tank body to prepare 10 to 50 percent washing slurry; (2) pumping the slurry intoa filtering device (4), controlling the pressure to be 0.1 to 2.0 MPa, and feeding filtrate into a collecting storage tank (3); (3) collecting the storage tank, standing for layering, and pumping thelower-layer ultrafine precipitate into the filtering device (4) again; (4) adding high-purity water into the raw material storage tank (1), and pumping into the filtering device (4) for filter pressing and washing until the total impurity content in filtrate at an outlet of the filtering device is less than 500ppm; and (5) carrying out pressure maintaining concentration on the ultrafine powder material in the filtering device (4), and controlling the water content to be 10 to 30%. The method has the advantages that the equipment investment cost is low, the operation is simple, no dispersing agent or flocculating agent is added, the yield is high, and the method has good universality in the aspect of washing the ultrafine powder material for the ceramic capacitor and is suitable for industrial production.

The invention discloses a planetary reducer which comprises a sun gear connected with an output shaft of a gearbox through a sun gear shaft. The planetary gear carrier is coaxial with the sun gear, the sun gear is contained in the planetary gear carrier, and one end of a sun gear shaft extends out of the planetary gear carrier; the planetary gear assembly is meshed with the sun gear and rotationally connected to the planetary gear carrier; at a high gear, power is output through an internal spline on the sun gear; and at the low gear, the power passes through the planetary gear assembly and then is output through an internal spline on the planetary gear carrier. The method has the advantages of good manufacturability, low cost and the like.

The invention provides a display panel, a manufacturing method of the display panel and a display device. The display panel comprises a substrate and a plurality of conductive layers, and the substrate comprises a display area and a non-display area surrounding the display area; the plurality of conductive layers are stacked on one side of the substrate; each conductive layer comprises a conductive part located on the display area and a wire located on the non-display area; and insulating layers are arranged between the wires, and the wires surround the display area to form an NFC coil. According to the display panel provided by the invention, the NFC coil with a three-dimensional structure is formed on the frame, so that an NFC antenna is integrated on a screen.