54results about How to "Free from erosion" patented technology

The invention provides a packaging structure, a packaging method and photoelectric equipment. The packaging structure comprises a substrate, a light emitting device, a liquid blocking layer, a net-shaped gap layer, a first water absorbing layer and at least one sealing barrier layer, wherein the light emitting device is arranged on one side surface of the substrate; the liquid blocking layer is arranged on the exposed surface of the light emitting device; the net-shaped gap layer is arranged on the surface, far from the substrate, of the liquid blocking layer; the material of the net-shaped gap layer comprises aerogel; the first water absorbing layer is arranged on the surface, far from the liquid blocking layer, of the net-shaped gap layer, and connected with the substrate in a sealing manner; the at least one sealing barrier layer is connected with the substrate in a sealing manner to form a sealed space; and the first water absorbing layer, the net-shaped gap layer, the liquid blocking layer and the light emitting device are arranged in the sealed space. By virtue of the packaging structure, the problem of poor sealing effect on vapor of the packaging structure of the light emitting device in the prior art is solved, the light emitting device is effectively protected from external vapor erosion, and the sealing effect is improved.

The invention relates to a 2D carbon / silicon-silicon carbide composite material pin preparation method and a preparation method and structure of a 2D carbon / silicon-silicon carbide composite material pin preform. The pin preparation method comprises 1, preparing a preform through horizontal paving (0 degree)-inclined paving (45 degrees) alternative laying of a 2D carbon fabric, graphite mold-based setting and carbon fiber vertical seaming on the multilayer carbon fabric, 2, depositing a pyrolytic carbon protective layer in the preform, 3, carrying out chemical vapor infiltration (CVI) to obtain a silicon carbide base, 4, cutting a flat blank to obtain a strip-shaped pin blank with the square section, 5, carrying out CVI silicon carbide protection of exposed fibers, 6, carrying out reactive melt infiltration (RMI) treatment, 7, milling the pin blank to obtain a pin with a standard size and 8, carrying out examination to obtain a carbon / silicon-silicon carbide composite material pin finished product. Through combination of CVI and RMI, the preparation method has the advantages of low production cost, short production period, low product porosity, high density and batch production. The ceramic-based composite material prepared by the CVI and RMI has shear strength of 80-100MPa at the room temperature.

The present invention relates to field adjustable spring brackets. The top sliding pair is installed on the top of the bracket on the spring bracket, and the top sliding pair provides support for the pipe bracket and the pipe; the bottom surface of the upper bracket of the spring bracket is provided with a vertically downward lower sleeve, and the lower bracket of the spring bracket It is arranged under the upper bracket of the spring bracket, and the top surface of the lower bracket of the spring bracket is provided with a vertically upward upper sleeve, the lower sleeve is set on the upper sleeve, and the working spring is arranged in the upper sleeve. The upper end of the spring is pressed against the bottom surface of the upper bracket of the spring bracket, and the upper end of the working spring is pressed on the upper surface of the upper bracket of the spring bracket; the upper bracket of the spring bracket and the lower bracket of the spring bracket are adjusted by a load preload value adjustment mechanism Connected, the upper bracket of the spring bracket and the lower bracket of the spring bracket can move up and down relative to each other. The invention has simple structure, ingenious design, more reliable performance than similar spring brackets, more convenient construction and installation, and the actual working performance is more consistent with the design requirements, thereby ensuring the long-term safe operation of the pipeline.

The invention relates to a multi-layer composite protection layer applied to PCB and a method. The multi-layer composite protection layer comprises a nano silicon dioxide coating, Parylene C coating,and epoxy resin coating which are arranged inside to outside, and the thickness of the Parylene C coating is 30-40 [mu]m. The application method comprises the steps of: 1) cleaning and dehumidifying the surface of a PCB; 2) socking the cleaned PCB into a nanosilicon dioxide liquid to obtain a PCB with a surface coated with nanosilicon dioxide; 3) coating a Parylene C material at the surface of thePCB with the surface coated with nanosilicon dioxide by employing a vacuum chemical vapor deposition method; and 4) obtaining the epoxy resin material at the surface of the PCB obtained in the step 3). The PCB is good in waterproof performance, can normally work in a soaking environment and has a good mechanical performance.