45030results about How to "Increase contact area" patented technology

The invention provides a method for preparing graphene or graphene oxide by using high-efficiency and low-cost mechanical stripping and relates to a preparation method of the graphene or the graphene oxide, solving the problems that the traditional micro-mechanical stripping method has low efficiency and can not be used for large-batch production. The method comprises the following step of separating carbon materials by utilizing solid particles and a liquid working medium (or gas working medium) and adopting mechanical stripping to obtain the graphene or the graphene oxide, wherein the carbon materials comprise graphite powder, expanded graphite, expandable graphite or graphite powder oxide. By using automatic machinery and using a great deal of solid particles for assisting stripping processes, the invention greatly increases the contact areas and the stripping times of the stripping processes, the carbon materials are subject to a great amount of stripping processes in a short time through the shearing and impacting functions of the solid particles on the carbon materials, and thereby the method obviously improves the stripping efficiency, has low cost and is suitable for the industrial and large-batch production of the graphene or the graphene oxide.

An artificial knee joint that includes a femoral component with a specially shaped bearing surface and a tibial component, whose surface interacts with the femoral surfaces. The interaction provides for the required motion and stability characteristics. The interaction between the femoral and tibial surfaces is such that as the knee is flexed to maximum, the femoral component moves posteriorly on the tibial surface, by an amount similar to that in the anatomic knee. This is accomplished primarily by the depth and width of the femoral trochlea diminishing as the femoral component is flexed from zero to maximum, together with a ramp on the center of the tibial surface. The opposite motion, roll forward of the femur from a fully flexed to a more extended position, is accomplished by varying the outward radii of the lateral and medial femoral bearing surfaces, together with a ramp on the postero-lateral and postero-medial regions of the tibial surfaces. A variation of this is to generate a tibial surface which provides for a progressive internal rotation of the tibia as flexion proceeds.

A spinal stabilization system includes at least two anchors having a bone attachment portion and a head portion and a flexible assembly coupled to the anchors. The flexible assembly includes a flexible cord, at least two connectors slidably mounted to the flexible cord, and at least one spacer slidably mounted to the cord between adjacent connectors. Each connector couples with a head portion of an anchor. The flexible assembly may be assembled and appropriately adjusted outside the body prior to it being coupled to the anchors. In addition, the connectors may include angled outer surfaces that provide enhanced engagement with the ends of the spacer. A method of stabilizing the spine includes securing anchors to the spine, assembling a flexible assembly outside the body, and coupling the flexible assembly to the anchors. The method may further include providing connectors with angled surfaces to provide enhanced engagement with the spacer.

The present invention relates to a rechargeable battery. The rechargeable battery includes an electrode assembly, a case, electrode terminals, and a cap plate. The electrode assembly includes a separator and an anode and a cathode disposed at both sides of the separator. The case houses the electrode assembly. The electrode terminals are electrically connected to the electrode assembly and protrude outwardly from the case. The cap plate closes and seals the case. The cap plate includes a terminal hole for receiving the electrode terminals and a sealing reinforcing member formed along a circumference of the terminal hole and having a greater thicker than a periphery thereof.

A heat-dissipating structure for a LED lamp includes a heat-dissipating base, a heat-dissipating body and a plurality of heat pipes. The heat-dissipating body has an outer cylinder formed into a hollow cylinder. The inside surface of the outer cylinder is provided with a plurality of accommodating grooves. The condensed ends of the plurality of heat pipes are inserted into the accommodating grooves. The end to be heated of the heat pipe is adhered to the heat-dissipating base. Further, the inside surface and the outside surface of the outer cylinder are formed with a plurality of heat-dissipating fins made by aluminum extrusion, so that the heat pipes are encircled by the heat-dissipating fins. In this way, the heat can be conducted by the plurality of heat pipes so as to increase the total contacting area. Thus, the heat can be rapidly conducted to the outer cylinder. Further, the heat can be rapidly dissipated to the outside by the heat-dissipating fins, thereby to substantially increase the efficiency in the heat dissipation.

A surface mounting structure and a packaging method thereof comprises a chip, a first conducting wire and a second conducting wire. The two conducting wires instead of lead frame architecture of the prior art is that the lead frame and a bridge jumper connected with N junction and P junction instead of the two conducting wires. The two conducting wires are drawn out from a bottom of a package, and are pressed and bent to original surface of the surface mounting pins so as to increase space utilization rate. Thereby it is to improve a complicated lead frame architecture of the prior art, increase use space and simplify system design.

The invention discloses electric conductive silver paste and a manufacturing method of the electric conductive silver paste. The electric conductive silver paste comprises, by mass percentage, 35 - 65 % of micron-sized silver powder, 1-10 % of nanometer-sized silver powder of or 1-20 % of nanometer-sized silver and other metal alloy powder, and 1-10 % of an organic carrier; for ceramics, solar cell silver paste comprises 2-15 % of unleaded glass powder, each component is manufactured in parts, weighed, mixed and stirred or mixed and rapidly scattered, and ultrasonic-vibrated or fine adjusted of viscosity of solvent, and therefore the electric conductive silver paste is obtained. Due to the fact that the nanometer-sized silver powder or the nanometer-sized silver alloy powder is mixed with the micron-sized silver powder, intensity of conductivity and a circuit is improved, adhesive force of crushing resistance and a base plate is improved, at the same time unleaded slurry good in thixotropy, low in contacting resistance and low in piece-needed slurry amount replaces lead slurry materials, the electric conductive silver paste is used for manufacturing crystalline silicon solar cells, improves photoelectric conversion efficiency, accords with environmental-protection ideas, and can be produced in large scales continuously.

The invention relates to a selective hydrogenation method of high unsaturated hydrocarbons in C4 fractions, which is characterized in that salvage stores which are rich in acetylene hydrocarbon and prepared by extracting butadiene are used as the material, and a fixed bed reactor is adopted to obtain 1, 3-budiene by selective hydrogenation under the existence of a catalyst. The adopted process conditions are as follows: the reaction temperature is between 30 DEG C and 90 DEG C, the reaction pressure is between 1.0 MPa and 4.0 MPa and the liquid space velocity is 7 to 20h<-1>. The catalyst is preferably a palladium system catalyst with alumina as a carrier, the specific surface is 50 to 150m<2>/g and the specific pore volume is 0.25 to 1.0ml/g. The method has remarkable good effects on reducing waste of resources and improving economic benefits by effectively utilizing the salvage stores rich in acetylene hydrocarbon and prepared by extracting butadiene.

A battery unit comprises a battery case, and a plurality of battery modules stored and held in the battery case. The battery case includes a bottom wall and a partition. The plurality of battery modules are mounted on the bottom wall. The partition is provided and erected on the bottom wall. The partition separates the battery modules adjacent in a second direction traversing a first direction. The first direction is oriented from a first end of the battery case at which an inlet is formed to a second end at which an outlet is formed. The partition extends along a plane where the battery modules face each other in the second direction along the battery modules. The partition is inclined in the extending direction.

The present disclosure relates to devices and methods for implanting a prosthesis into a heart of a mammal, such as a person. The disclosure includes a prosthesis that acts as a pressure vent between the left and right atria of the heart. The disclosure also includes a mounting tool for mounting the prosthesis onto a loading tool, the loading tool useful for loading the prosthesis onto a device for delivering the prosthesis into the patient's heart. Control devices and methods for using these devices are also disclosed. The intracardiac pressure vents disclosed allow sufficient flow from the left atrium to the right atrium to relieve elevated left atrial pressure and resulting patient symptoms. The devices also limit the amount of flow from the right atrium to the left atrium to minimize the potential for thrombi or other embolic material from entering arterial circulation.