4results about How to "Diffusion in time" patented technology

This utility model relates to the field of printed circuit board technology and discloses an inner layer edge structure of a circuit board, including: a first edge plate body disposed around the substrate body; a plurality of first flow-blocking beads equidistantly arranged on one or both sides of the edge plate body; and a plurality of second flow-blocking beads equidistantly arranged on one or both sides of the first flow-blocking beads, wherein the protruding area of ​​the second flow-blocking beads is larger than that of the first flow-blocking beads, and a first adhesive flow groove is formed between the first flow-blocking beads and the second flow-blocking beads to accommodate the flow of adhesive. This design can not only significantly reduce the flow velocity of the fluid and effectively prevent it from flowing outside the circuit board, thereby avoiding the problem of insufficient adhesive filling of the board pattern, but also the first adhesive flow grooves of different widths formed between the first and second flow-blocking beads of different sizes are interleaved, which can timely and evenly spread the adhesive of the insulating layer along the first adhesive flow groove, thereby ensuring uniform adhesive filling and reducing the probability of defective products.

The application relates to a diaphragm and an electrochemical device and an electronic device comprising the same, and belongs to the technical field of electrochemical energy storage. The diaphragm comprises a porous substrate and a porous coating on at least one side surface of the porous substrate, and the porous coating comprises fibrous fillers; the fibrous fillers comprise a core layer and a shell layer on the surface of the core layer, the core layer comprises at least one of Mxene and an oxide thereof, MOFs and an oxide thereof, black phosphorus and an oxide thereof, and carbon; the shell layer comprises at least one of silicon dioxide and a lithiumophilic metal oxide; the mass ratio of the shell layer to the core layer of the fibrous fillers is M; the thermal conductivity of the diaphragm is lambda W / (m.K), the specific heat capacity is Cp J / (g.K), and the density is rho g / cm 3 ; the following relationships are satisfied: 0.010 <= (M*lambda) / (2Cp) <= 0.017 and 0.4 <= lambda / (rho*Cp) <= 1.0. The diaphragm can improve the safety performance, cycle life and rate performance of a battery.

The application provides a ZSM-5 molecular sieve, a preparation method and application thereof, a hydroprocessing catalyst, a hydrodewaxing catalyst and application thereof. The pyridine infrared total acid amount of the ZSM-5 molecular sieve is 0.03-0.40 mmol / g, the di-tert-butyl pyridine infrared total acid amount is 0.002-0.02 mmol / g; the mesopore volume of the ZSM-5 molecular sieve accounts for 10-20% of the total pore volume, and / or the mesopore volume of 2-10 nm in the ZSM-5 molecular sieve accounts for 70-95% of the total mesopore volume. The molecular sieve has obvious technical advantages as a carrier or an active component, for example, the hydrodewaxing catalyst prepared from the ZSM-5 molecular sieve can be used for oil product treatment to simultaneously improve the quality and yield of low-condensation oil products.

This invention relates to the field of rocket engine testing technology and discloses a method for handling hazardous media, comprising: setting a first and a second field torch above the thrust chamber of the rocket engine, and setting a third field torch below the thrust chamber; the first, second, and third field torches are adapted to ignite the hydrogen-oxygen mixture discharged before the pre-combustion chamber ignites; a fourth and a fifth field torch are respectively arranged to the left and right of the thrust chamber of the rocket engine; the fourth and fifth field torches are adapted to ignite the hydrogen-rich gas discharged after the pre-combustion chamber ignites; both the hydrogen-oxygen mixture and the hydrogen-rich gas are hazardous media. This application, by setting five field torches and using field ignition, can promptly ignite the hazardous media discharged from the thrust chamber outlet of the rocket engine, safely handle the hydrogen-oxygen mixture and hydrogen-rich gas, and meet the safety testing requirements of rocket engines.