4 results about "Glass epoxy" patented technology

The invention discloses a coal mine surrounding rock water flowing crack plugging material and a use method thereof, and belongs to the field of water flowing crack plugging materials. The coal mine surrounding rock water flowing fracture plugging material is composed of a material A and a material B, wherein the material A comprises the following components in parts by mass: 10-15 parts of modified polylactic acid, 2-5 parts of water glass, 3-20 parts of sodium bicarbonate and 100-150 parts of water; the material B is prepared from the following components in parts by mass: 0.5 to 3 parts of epoxy resin and 0.1 to 1 part of diethylenetriamine. When the plugging material is used, a target aquifer is plugged by adopting the prepared plugging material for the water-conducting fracture. The modified polylactic acid is matched with the water glass, the epoxy resin and the like, so that the prepared plugging material has high strength, can keep relatively good high-pressure resistance, can absorb water to swell, realizes a relatively good crack plugging effect, and has the advantages of corrosion resistance, environmental protection performance and the like.

The invention discloses a preparation method of a metallic glass-epoxy resin composite film and a friction power generation element, and relates to the technical field of composite materials. Epoxy resin and curing agent liquid are used as matrixes; determining preset metal glass powder corresponding to the epoxy resin liquid according to the mass ratio; and doping preset metal glass powder into the epoxy resin and the curing agent liquid in the matrix to form the metal glass-epoxy resin composite film. According to the invention, through doping of the metal glass powder, the number of flowing charges is increased, so that the performance of the composite film power generation element is improved. The charge transfer characteristic is changed in the process, so that more shallow traps are formed in an interface region between the metal glass powder and the epoxy resin matrix, and less energy is released in the charge carrier process. Meanwhile, the preset metal glass powder with the determined mass ratio is introduced to improve accumulation and retention of charges, and the performance and efficiency of the power generation element are improved.

A method for fabricating heavy-load high-current 10 kV lightning arrester, comprising: obtaining a target valve plate from candidate valves through a direct-current reference-voltage test, where the target valve plate meets that: a surge current capacity is greater than or equal to 100 kA, a square-wave current capacity is greater than 600 A, a residual voltage under 10 kA surge current is less than or equal to 45 kV, and repetitive charge transfer rating is greater than or equal to 0.8 C; and assembling a glass-epoxy layer and an electrode pair into a sealed shell inside which the target valve plate is disposed, where the target valve plate is electrically connected to a first electrode and a second electrode in the electrode pair to form the heavy-load high-current 10 kV lightning arrester. An issue of frequent faults of lightning arresters in conventional technology is addressed.

In order to improve adhesion between a sintered layer of metal nanoparticles and an insulating rigid substrate in a circuit board that uses a rigid insulating substrate, the present invention provides a circuit board that is provided with an insulating rigid base material containing a glass epoxy resin, a primer resin layer formed on the insulating rigid base material and containing an epoxy resin, a sintered layer of metal nanoparticles formed on the primer resin layer, and a plating layer formed on the sintered layer. The insulating rigid base material satisfies 147 ≤ X and 0.34 ≤ Y, where X is the glass transition temperature (°C) of the insulating rigid base material and Y is the thermal conductivity (W / mk) of the insulating rigid base material.