48results about How to "Reduce the effective contact area" patented technology

In a nonvolatile semiconductor memory device including a variable resistive element formed by sequentially stacking a lower electrode, a variable resistor with a perovskite-type crystal structure, and an upper electrode, at least one of the lower electrode and the upper electrode is a particulate electrode configured to include a particulate conductor aggregate so that the contact area with the variable resistor at an interface is effectively reduced to realize high initial resistance of the variable resistive element. Further, a film of the variable resistor is preferably formed so as to be in a highly crystalline state.

A solid electrolytic capacitor including an anode body, a dielectric layer arranged on the anode body, a conductive polymer layer arranged on the dielectric layer, and a cathode layer including a carbon layer arranged on the conductive polymer layer and a silver layer arranged on the carbon layer. The conductive polymer layer includes ridges and valleys formed in a surface that faces toward the cathode layer. The silver layer includes a first silver layer, which is arranged on the carbon layer, covers the ridges and valleys, and mainly contains spherical silver particles, and a second silver layer, which is arranged on the first silver layer and mainly contains silver flakes.

A method of producing a porous sheet, which comprises the steps consisting of preparing a dispersion having ultra-high-molecular-weight polyethylene particles dispersed in a solvent, applying the dispersion onto a film to form a coating layer thereon, sintering the coating layer, and removing the solvent contained in the coating layer.

The invention relates to a pneumatic constant pressure valve which comprises a valve body and a valve cap, wherein the valve cap is hermetically matched with the valve body; a sealing diaphragm is arranged between the valve body and the valve cap, the outer edge of the sealing diaphragm is clamped between the valve body and the valve cap, the rest part of the sealing diaphragm can move up and down in the working state, and a through hole is arranged in the middle of the sealing diaphragm; an air inlet and an air inlet standard part 1 for sealing the air inlet are arranged on the valve cap; a through hole is arranged in the middle of the valve cap; a liquid inlet on the side wall and a liquid outlet on the bottom are arranged on the valve body; a valve spool rod hermetically passes through the through hole of the valve cap and the through hole of the sealing diaphragm and extends into the valve body; a valve plug hermetically matched with the liquid outlet is arranged at the lower end of the valve spool rod; and when the sealing diaphragm moves upwards, the valve spool rod is driven by a link mechanism to move upwards to separate the valve plug from the liquid outlet. The pneumatic constant pressure valve of the invention adapts to the requirements of large scale production, can realize opening of the valve and control of the liquid flow and liquid pressure at the outlet under the working state of the valve without frequently replacing components, simultaneously has good pressure stabilizing effect, and can adapt to different liquid environments.

The invention provides a lithium ion battery, a preparation method thereof and an electric vehicle comprising the lithium ion battery. The lithium ion battery comprises a positive pole piece, a negative pole piece, an isolating membrane and electrolyte. The positive pole piece comprises a positive active material; the positive active material comprises a substrate, a first coating layer and a second coating layer; the first coating layer coats the surface of the substrate in a discrete island form; the second coating layer coats the surfaces of the first coating layer and the substrate in a continuous layered form; and the electrolyte comprises an additive A and an additive B, the additive A is selected from one or more of cyclic sulfate compounds as shown in a formula 1 and a formula 2, and the additive B is selected from one or two of lithium difluoro bis (oxalate) phosphate and lithium tetrafluoro (oxalate) phosphate. According to the lithium ion battery, preparation method thereof and the electric automobile comprising lithium ion battery of the invention, the gas production rate of a lithium ion battery can be reduced, the cycle life and storage life of the lithium ion battery can be prolonged, and the increase of direct-current internal resistance of the lithium ion battery in cycle and storage processes can be remarkably inhibited.

The invention discloses a high-performance combined rectangular waveguide, which comprises two waveguide cavity components. A rectangular waveguide cavity extending along the transmission direction of microwave signals is arranged at the connection of the waveguide cavity components. Next to the rectangular waveguide cavity, a first contact portion and a second contact portion are respectively provided, and the extension direction of the first contact portion and the second contact portion is the same as that of the rectangular waveguide cavity; there is at least one first contact portion, A first contact surface is formed between the first contact part and the first contact part, or another waveguide cavity component; there is at least one second contact part, between the second contact part and the second contact part, or another waveguide cavity component The second contact surface is formed between them; if the width of the first contact surface is A, the width of the second contact surface is B, and the width of the section of the rectangular waveguide cavity intercepted by the plane where the connection is located is C, then A, B, and C exist as follows Proportional relationship: 3A≤C≤7A, 3B≤C≤7B. The invention can ensure that the combined rectangular waveguide has good transmission characteristics.

The invention relates to efficient inorganic additive for lowering contact resistance of a back electrode of a solar cell. The efficient inorganic additive comprises, by weight percent, 50-88% of bismuth trioxide nanotube, 9-20% of manganese dioxide nanotube, 1-20% of tin oxide nanotube, 1-20% of zinc oxide nanotube and 1-20% of titanium oxide nanotube. The nanotubes are summed up to 100% by weight percent. Compared with the prior art, the efficient inorganic additive has the components which are highly flexural and can wind on surfaces of glass powder and silver powder in sliver paste so as to allow the sliver powder to contact with the glass powder in multi-point manner, so that actions of the components are given to fuller play. In addition, the nanotube inorganic additive forms gaps, excessive sintering of the sliver powder can be avoided while formation of conductive path of the sliver powder is not broken, and accordingly the contact resistance of the back electrode of the solar cell can be lowered.