155results about How to "Aspect ratio" patented technology

The invention provides polyaniline-graphene composite based anticorrosive paint and a preparation method thereof. The polyaniline-graphene composite based anticorrosive paint comprises, by weight, 20-90 parts of film former, 0.1-20 parts of polyaniline-graphene composite, 1-10 parts of pigment, 1-10 parts of filler, 0.1-3 parts of sag-proof agent, 0.1-4 parts of dispersant, 0.01-2 parts of flatting agent, 0.01-2 parts of defoaming agent, and 1-50 parts of solvent. The paint has good physical anticorrosion as graphene is high in radius-thickness ratio and high in flexibility and has electromechanical anticorrosion by the aid of polyaniline loaded on the surface of the graphene, and under synergism of the polyaniline and the graphene, the paint has fine metal corrosion resistance. The anticorrosive paint achieves passivation and corrosion inhibition of metal substrates, avoids use of heavy metals causing environmental pollution, such as chromium and the like, and is simple to prepare, low in cost and easy in industrial batch production.

A method for adjusting the geometry of photomask patterns is provided. Such adjusted pattern can be employed to achieve pattern doubling in subsequent layers. A patterned photoresist mask is provided over an underlayer. A polymer layer is placed over the mask. The mask is selectively trimmed to generate individual mask features having an increased aspect ratio. Subsequent pattern layers can be formed on the trimmed mask pattern to generate a hard mask having increased pattern density. The hard mask is selectively etched and the material of the trimmed mask pattern is removed. The underlayer is then etched to achieve pattern transfer from the hard mask to the underlayer to achieve a final double density pattern.

A semiconductor structure includes a substrate, and a first MOS device on the first region of the substrate wherein the first MOS device includes a first spacer liner. The semiconductor structure further includes a second MOS device on the second region wherein the second MOS device includes a second spacer liner. A first stressed film having a first thickness is formed over the first MOS device and directly on the first spacer liner. A second stressed film having a second thickness is formed over the second MOS device and directly on the second spacer liner. The first and the second stressed films may be formed of a same material.

The invention discloses a polyamide/graphite composite material with high conduction performance and a preparation method thereof. The composite material consists of a polyamide substrate and nanometer graphite and is prepared through in-situ polymerization. The nanometer graphite has high diameter-to-thickness ratio; and an effective conduction network can be formed in a polymer by using little nanometer graphite. With the low content of a conduction filling of the nanometer graphite, a conduction polymer material keeps original good mechanical performance. The volume conductivity of the polyamide/graphite composite material with high conduction performance can reach 8*10S/cm; and compared with a conventional natural graphite and expanded graphite conductive composite material, the polyamide/graphite composite material has excellent properties of low filling amount and high conductivity.

A method of fabricating an array of micro electrodes enabled to have customizable lengths. A substantially criss-cross pattern of channels on a top surface of the work-piece substrate (10) is formed using electrical discharge machining to form a plurality of shaped columns (20) having tapered profiles. The shaped columns have a tapering profile which extends at least 50% of the length of the columns. The plurality of shaped columns is etched to sharpen the tapered tips into needle tips forming the array of microelectrodes.

The invention discloses a multi-functional spindle mechanism used for the small deep holes electrical discharge machining, belonging to the technical field of micro non-traditional machining. The multi-functional spindle mechanism comprises a rotating spindle mechanism, a transmission mechanism, a normally closed clamp mechanism, a sealing mechanism, an electric brush mechanism, a wire replacing mechanism, a normally opened clamp mechanism, a guide mechanism and a connecting mechanism, wherein the rotating spindle mechanism, the transmission mechanism, the normally closed clamp mechanism, the sealing mechanism, the electric brush mechanism and the wire replacing mechanism are fixedly mounted on an upper mounting plate, and the normally opened clamp mechanism is mounted on a lower mounting plate; the upper mounting plate is connected to the lower mounting plate through the guide mechanism and a degree of freedom of relative movement in the z direction is kept; the upper mounting plate is connected to a z-axis top plate through the connecting mechanism, and the lower mounting plate is connected to a z-axis bottom plate through the connecting mechanism. The mechanism processes the film cooling group holes in the hot components of the aero-engines and the gas turbines, which can realize multiple functions of the forward pushing creep feed, the high precision rotation and the hollow high pressure flushing of the tool electrodes, and the on-line replacement of the electrodes.

The invention introduces a solvent-free epoxy weight anticorrosion paint used for coated joints of a steel buried pipeline, which comprises a component A and a component B; wherein the mass percentage of each raw material in the component A comprises: 30-45% of epoxy resin, 5-15% of glycidyl ether active diluent, 0.05%-1% of silicone defoamer, 20-35% of compound anti-rust pigment, 3-10% of other pigments, 5-15% of barium sulfate mineral filler, 10-20% of other mineral fillers and 0.3-1.5% of polyamide wax; the mass part of each raw material in the component B comprises: 10-25 parts of polyamide curing agent, 5-15 parts of Mannich base and 0.5%-2 parts of curing accelerator; and the mass ratio of the component A to the component B is 100 to 15-35. The paint provided by the present invention has the advantages of pure epoxy, environmental friendly performance and saved resource due to solvent-free property; and is capable of raising the anti-corrosive property, chemical resistance property and insulating property; and is capable of raising the toughness resistance, wear resistance and impact resistance of the coating by employing the mineral fillers.

The invention provides a method for precisely machining a deep groove and a deep hole by varifocal lasers. The method comprises the steps that a plurality of focusing lenses with different focal lengths and workpieces are clamped; if deep groove machining is carried out, a laser beam is continuously output; laser etching machining is completed once; if deep hole machining is carried out, N laser pulses are output; the lasers are closed, and a working table moves to the original position; whether machining meets the requirements or not is detected; if machining meets the requirements, machining is finished; if machining does not meet the requirements, a focusing lens base is rotated, the next focusing lens is moved to the position of the current focusing lens, and laser machining is carried out again until machining meets the requirements. The pulse laser beam sequentially penetrates through the focusing lenses with the different focal lengths by rotating the focusing lens base, the focal lengths are progressively changed, the lasers are focused on the new exposed surface in the laser etching or punching process all the time, energy is more concentrated, the punching deep is larger, and the efficiency is higher. The invention provides a device for precisely machining the deep groove and the deep hole by the varifocal lasers at the same time.

The invention provides an electric spark small hole machining technology achieved through a dispersing agent working solution and a brass/nickel electrode and belongs to the field of non-traditional machining of an advanced manufacturing technology. The technology is characterized in that the water-based working solution and the brass/nickel composite electrode are used for conducting electric spark small hole machining, no improvement on an electric spark small hole machining lathe is needed, it is only required that the outer surface of the water-based dispersing agent working solution is used and the surface of a brass tubular electrode is electroplated with a layer of metal nickel with the melting point higher than that of an internal base material, and therefore the composite electrode is formed; the electroplating technology is mature, a core raw material of the working solution is low in cost, preparation is simple and practical, the technology is economical and easy to achieve, the speed, the depth-to-diameter ratio and the quality for electric spark small hole machining can be improved to a great extent through small investment, and the relative loss rate of a tool is reduced. The electric spark small hole machining speed and the depth-to-diameter ratio are improved, the electrode loss of the tool is reduced, the machining quality is improved, and the technology is wide in application prospect and high in popularization value.

The invention relates to a method for producing a seamless titanium and titanium alloy welded pipe. By the method, the welded pipe is obtained by welding a pipe material on an automatic precise welded pipe production line; and particularly, the production method comprising the step of performing one-time or repeated cold rolling-thermal treatment on the welded pipe. The cold rolling-thermal treatment process comprises the following steps of: (1) cold-rolling the welded pipe by using a multi-roller pipe milling machine, and lubricating the inner and outer surfaces of the pipe material in the cold rolling process, wherein the total machining rate of a cold-rolling finished product is controlled to 50 to 70 percent, the machining rate in all processes is controlled to 15 to 50 percent, and a cold rolling process is performed for 2 to 3 times; (2) after the cold rolling process, degreasing the pipe material, and cleaning; and (3) annealing the degreased and cleaned pipe material in a vacuum annealing furnace. By the method, the seamless welded pipe can be obtained; and the method is high in production efficiency, low in cost and light in environmental pollution.

The invention discloses a high-effective anaerobic biological reactor, which comprises the following parts: reactor bulk, inlet pipe on the bottom of reactor bulk and upflow typed reacting chamber, wherein the upflow typed reacting chamber connects external cylinder of sediment chamber through increaser; the three-phased separator I chamber, mud gas elevating pipe are set in the sediment chamber; the three-phased separator II chamber is set on the top of mud gas elevating pipe with increaser on the bottom; the top of three-phased separator I chamber is reducer with gas collecting lid on the bottom; the reflux seam is set between gas collecting lid and increaser on the external cylinder to sediment mud; the mud gas elevating pipe connects the external cylinder through level support board, which connects flow baffle; the sediment chamber is set on the exterior of mud gas elevating pipe.

The invention discloses a silver paste used for positive electrodes of solar batteries and grid lines, which comprises silver powder, glass powder, additive and an organic carrier. The silver paste is prepared by the following steps of: preparing a highly dispersed superfine silver grout used as the silver powder through a chemical liquid phase reduction method, then obtaining wet silver powder through solid-liquid separation, and preparing the agglomerate-free silver paste through direct mixing of the wet silver powder and the glass powder, the additive and the organic carrier according to the specified proportion without drying. The method for preparing the positive silver paste directly by using the wet silver powder comprises the steps of: preparation of the superfine silver powder through the chemical liquid phase reduction method, solid-liquid separation, washing, and direct preparation of the silver paste without a drying procedure in which the silver powder is easily agglomerated. The silver paste is characterized by high dispersity, no agglomeration and smaller fineness; and positive electrodes of solar batteries and grid lines, prepared through the screen printing and fast sintering process, have high definition, high evenness, high electrical conductivity and excellent photoelectric conversion efficiency.

A method for forming transistors is provided. The method includes providing a substrate having a base and at least a fin on the base; and forming a gate layer on the fin, the gate layer has first side surfaces parallel to a longitudinal direction of the fin and second side surfaces perpendicular to the fin. The method also includes forming a protective layer on the first side surfaces of the gate layer to protect a vertex of the top of the gate layer from having EPI particles; and forming sidewall spacers on side surfaces of the protective layer and the second side surfaces of the gate layer. Further, the method includes forming a stress layer in the fin at both sides of the sidewall spacers and the gate layer.

The invention discloses a graphene-based nanometer zero-valent iron coating comprising the following components in parts by weight: 1-20 parts of graphene-based nanometer zero-valent iron, 1-15 parts of graphene-based nanometer titanium dioxide, 1-15 parts of graphene-based nanometer aluminum oxide, 1-15 parts of graphene-based nanometer silicon dioxide, 1-15 parts of graphene-based nanometer calcium carbonate, 5-60 parts of epoxy resin, 3-30 parts of polyphenylene sulfide resin, 1-15 parts of an amino resin crosslinking agent, 3-50 parts of a mixed-type organic alcohol solvent, 0.5-1.9 parts of a nonionic surfactant, 0.8-1.6 parts of a dispersing agent, 0.5-1.5 parts of a thickening agent, 0.1-0.3 part of a defoaming agent, 0.1-5 parts of a plasticizer, 0.2-0.5 part of a flatting agent, 1-10 parts of a pigment and 0.5-1.0 part of a filler. The invention also provides a preparation method of the coating. The performances such as high temperature resistance, corrosion resistance, hardness, surface adhesion, weather resistance, acid and alkaline resistance and impact resistance of the coating disclosed by the invention are remarkably improved.

The invention provides a pressure-resistant impact-resistant PE pipe material and a preparation method thereof, and belongs to the technical field of PE pipe materials. The pressure-resistant impact-resistant PE pipe is composed of the following components in parts by weight: 60-80 parts of polyethylene, 5-30 parts of coupled inorganic silica, 2-10 parts of heat stabilizer, 0.5-2 parts of dispersing agent, 0.5-3 parts of toughening agent, and 0.5-5 parts of paraffin. The invention also provides a preparation method of the pressure-resistant impact-resistant PE pipe material. The PE pipe material of the invention has good pressure and impact resistance.