177results about How to "Diffusion coefficient is small" patented technology

This inveention discloses a solder hump and its manufacturing method, which first of all coats a patttern photo resist layer on a wafer or UBM under salient points to form a figure area, in which, said UBM layer includes Cr/Cu, Cr/CrCu/Cu, Ti/Cu, TiW/Cu or Ta/Cu deposited layer by layer, then forms a Ni layer as the block layer in the figure, on the wafer or above the UBM layer and forms a Cu layer on the block layer as a welding layer and finally removes the photo resist layer on the un-figure region and etches the UBM layer covered by the un-figure region of the photo resist layer to form solder salient points on the welding layer to further realize connection of the wafer with outside by the welding way.

The invention discloses a modified metakaolin-based permeation-resistant and crack-resistant agent for concrete. The modified metakaolin-based permeation-resistant and crack-resistant agent for concrete comprises: by mass, 10 to 75% of modified metakaolin, 5 to 40% of fine limestone powder, 4 to 40% of superfine coal ash, 1 to 20% of calcined hydrotalcite, 2 to 40% of fine quartz sand and 0.2 to 20% of solid silane powder. A preparation method of the modified metakaolin comprises the following steps of putting dry and washed kaolin into a bowl mill, carrying out grinding to obtain kaolin powder, carrying out calcination of the kaolin powder at a temperature of 500 to 1000 DEG C for 0.5 to 6.0 hours to obtain metakaolin, putting the metakaolin into a dispersion machine, adding an organic modifier of sulfamate or triethanolamine into the metakaolin, wherein a mass ratio of the metakaolin and the organic modifier is in a range of (5000: 1) to (100: 1), and carrying out dispersion to obtain the modified metakaolin having a contact angle of 50 to 100 degrees and a specific surface area of 8000 to 15000m<2>/kg. The modified metakaolin-based permeation-resistant and crack-resistant agentfor concrete can be utilized as a concrete additive, improves strength of concrete at different ages, does not produce obvious influences on concrete work performances, obviously improves anti-chloride ion penetration capability of concrete, reduces total shrinkage of concrete and improves crack resistance of concrete.

The invention discloses a highly-effective light-emitting diode with an improved current spreading layer structure and a production method thereof. Material which is extended on an N-GaAs under-layer comprises an n-GaAs buffer layer, or an AlAs/AlxGal-xAs or AlInP/(A1x Ga1-x)yIn1-yP Bragg reflection layer, an n-(AlxGa1-x)yIn1-yP lower limiting layer, an Undoped-(AlxGa1-x)yIn1-yP active region, a p-(A1xGa1-x)yIn1-yP upper limiting layer, and a p++AlxGal-xAs and p-GaP combined current spreading layer, wherein the p++AlxGal-xAs is arranged on the lower surface as a first current spreading layer, and the p-GaP is arranged on the upper surface as a second current spreading layer. The structure integrates the advantages of GaP and A1xGal-xAs materials, avoids the oxidization of materials, and guarantees the reliability and the stability of the current spreading and apparatuses.

The invention discloses a novel high-temperature alloy heat-resistant stainless steel bolt and a production process thereof. The bolt comprises the components of, by mass, no more than 0.08% of C, no more than 1.00% of Si, no more than 2.00% of Mn, no more than 0.035% of P, no more than 0.030% of S, 24.0-27.0% of Ni, 13.5-16.0% of Cr, 1.90-2.23% of Ti, no more than 0.35% of Al, no more than 0.10-1.50% of Mo, and balance of Fe and unavoidable impurities. The production process comprises that the raw materials are subjected to the steps of solid smelting, cold heading molding, re-crystallization and annealing, stress-removing tempering, hexagon-head cutting and wire rolling, washing, stabilization treatment, and aging treatment. With the process, the bolt has the advantages of high strength, high relaxation-resistance, low notch sensitivity, certain endurance strength, good oxidation resistance, and the like.

The present invention relates to high-performance high-speed steel, and particularly to a high-hardness high-wear-resistant powder metallurgy high-speed steel which is manufactured according to a power metallurgy method and contains Al. The high-speed steel is composed of C, Si, Cr, Mo, V, W, Nb, Mn, Co, Al, Fe and impurities. The high-speed steel manufactured according to the technical solution has the following advantages: more than 67.5HRC of quenching-tempering hardness, better red hardness and wear resistance, stronger bending strength and lower cost.

The invention discloses a mobile phone image denoising method based on wavelet transform edge detection. The mobile phone image denoising method disclosed by the invention can be used for effectively smoothing noise, reserving image edge details and removing colour noise at the same time, so that an ideal denoising effect is obtained. The mobile phone image denoising method disclosed by the invention comprises the following steps: firstly, reading a colour noise image, and converting an input image into a YUV colour space from an RGB colour space; secondly, smoothing the image by adopting a Gaussian filter, and carrying out lowpass filtering on a Y channel image three times; thirdly, detecting the edge of the image by utilizing a wavelet transform algorithm; fourthly, obtaining a binary image of the edge by carrying out threshold segmentation; fifthly, smoothing noise by carrying out anisotropic diffusion at the edge region of the image; sixthly, carrying out mean filtering in a smooth region of the image for denoising; seventhly, further removing the colour noise from the image in the smooth region; and eighthly, converting the image into the RGB colour space from the YUV colour space to obtain a final denoised image.

The invention discloses a chloridion-corrosion resistant concrete synergist. The component percentage is anti-bleeding component : anti-permeability waterproof component : enhancing component : dispersing component : entraining component : coordinating component; the anti-bleeding component comprises polysaccharide and/or cellulose ether and/or polyacrylamide, the anti-permeability waterproof component comprises methyl sodium silicate and/or organosilicon waterproofing agent, the enhancing component comprises glycol monoisopropanolamine, composition of the glycol monoisopropanolamine and triethanolamine and triisopropanol, the dispersing component comprises MF and/or TCL and/or NNO, the entraining component comprises dodecyl benzene acid sodium and/or dodecyl benzene sodium sulfate, and the coordinating component comprises polymeric alcohol amine and polymeric polyhydric alcohol. The invention further provides a production technology for the chloridion-corrosion resistant concrete synergist. The chloridion-corrosion resistant concrete synergist is capable of improving the concrete strength, reducing the bleeding rate and reducing the slump loss.

The invention provides a composite anti-corrosion and anti-rust agent for preparing high-durability concrete, which comprises the following components in weight portion: 20 to 30 portions of anti-corrosion and anti-rust agent, 20 to 30 portions of super plasticizer, 1.0 to 3.0 portions of collapse protecting agent, 0.5 to 2.0 portions of adhesion promoter, 0.20 to 0.40 portion of air entraining agent, 0.05 to 0.20 portion of antifoaming agent, and 35 to 60 portions of water. The composite anti-corrosion and anti-rust agent has the advantages that the prepared concrete not only has anti-corrosion and anti-rust effects, but also can achieve good concrete fluidization, good cohesiveness, good collapse protecting property, small diffusion coefficient (Da) of concrete chloride ion, and good freezing-thawing resistant circulating property under the condition of low water to glue ratio.

The invention discloses a preparation method of a diode chip on a P+ substrate and a structure of the diode chip. The method comprises the following steps of: directly forming a P- epitaxial layer on the P+ substrate through epitaxy; forming a P+ well through filling boron; annealing a P well; forming an N- ring region through photoetching and etching; annealing the N- ring; forming an N+ main junction region through photoetching and etching; annealing the N+ main junction region; evaporating or sputtering A1 as a positive electrode and the like. In the structure, special structures of the P-epitaxial layer, the P+ well and an N- voltage dividing ring device, and an N+ arsenic filling process are adopted to ensure that the N+/P+ is broken down on a plane and to avoid lateral breakdown; the voltage of a diode formed on the P+ substrate is reduced to be lower than 5.1V, the lowest voltage can reach 2.0V, and leakage current is within 100uA, so that the uniformity of the voltage in the chip is ensured to be within 5%; and in fact the diode is a P-N junction formed by the P well and an N+ region. The structure is successfully applied to the fields of a low-voltage voltage-regulator diode and a low-voltage transient voltage suppressor diode.

The invention provides a metal vanadate compound co-doped high-nickel ternary precursor and a preparation method thereof. A metal vanadate compound is doped in the coprecipitation reaction process, sothat one or two or more metals are synergistically doped to modify a nickel, cobalt and manganese or aluminum ternary precursor material; in the preparation process, a complexing agent solution and ametal solution are equally divided into an upper liquid inlet pipe and a lower liquid inlet pipe, and added into a reaction kettle; different regulation and control modes and growth process parameters are adopted in different stages of precursor growth; the ternary precursor with special primary particle morphology such as a flower sheet shape, a slender spindle shape, a thick and short rod shapeand the like or loose, porous, dense, hollow and other section morphology inside can be prepared, and the requirements of lithium batteries with different properties on precursors with different physical properties can be met.

The invention provides a narrow-hardenability pinion steel which comprises the following components in percentage by weight: 0.18%-0.22% of C, 0.20%-0.30% of Si, 0.90%-1.15% of Mn, less than or equal to 0.030% of P, less than or equal to 0.030% of S, 1.00%-1.35% of Cr, 0.04%-0.08% of Ti, 0.004%-0.005% of B, 0.025%-0.038% of W, less than or equal to 11.5*10<-6> of [O], less than or equal to 1.5*10<-6> of [H], 35*10<-6>-45*10<-6> of [N] and the balance of Fe and inevitable impurities. The invention provides a preparation method of the narrow-hardenability pinion steel. The preparation method comprises the following steps: 1) primary smelting based on a top-bottom blowing converter; 2) ladle deoxidizing and alloying; 3) LF (ladle furnace) refining; 4) RH refining; and 5) continuous casting. Compared with the prior art, the narrow-hardenability pinion steel provided by the invention has the characteristics of better wear resistance and high temperature resistance, higher hardenability andnarrower jominy hardenability.

The invention provides a humidity sensing ceramic and a preparation method thereof. An organosilane modification layer is arranged on the surface of a humidity sensing ceramic substrate, and the surface contact angle is 85 to 95 degrees. The organosilane is used for modifying the surface of the humidity sensing ceramic; the contact angle of fog drops deposited on the surface of the ceramic is changed; the diffusion coefficient of the fog drops on the surface of the humidity sensing ceramic is reduced. The invention also discloses a fog drop deposition sensor prepared by the humidity sensing ceramic and application of the fog drop deposition sensor to the unmanned aerial vehicle chemical spraying fog drop deposition characteristic detection. The fog drop deposition sensor provided by the invention has the advantages that information such as fog drop average particle diameter, fog drop density, fog drop covering rate and distribution uniformity can be accurately detected; meanwhile, a detection resistor reflects the relative humidity change; the fog drop deposition quantity comparison conditions of the chemical spraying specific regions can be obtained.

The invention relates to a composite type reinforced concrete rust inhibitor. The composite type reinforced concrete rust inhibitor comprises the following components by weight percent: an anode type rust inhibitor adopts 20.0 to 30.0 percent of calcium nitrite and 10.0 to 15.0 percent of sodium benzoate; and a cathode type rust inhibitor adopts at least one of sodium hexametaphosphate and zinc oxide, wherein the cathode type rust inhibitor comprises 1.0 to 3.0 percent of sodium hexametaphosphate, 2.0 to 4.0 percent of zinc oxide, 0.001 to 0.005 percent of air entraining agent and the balance of volcanic ash. The rust inhibitor can effectively retard and prohibit the corrosion of reinforcing steel bars in reinforced concrete and can prohibit or delay the destruction of chlorine ions to a reinforced passivating film. The invention has the advantages of little use quantity, use quantity reduction of a single rust inhibitor and the like, is a high-efficiency concrete reinforcement rust inhibitor and can be widely applied to the fresh reinforced concrete structure of the engineering of seaports, railways, coastal buildings, civil buildings and the like.

The invention relates to an Al-Ni-Ce-La aluminum-based amorphous alloy which comprises the following components: Al84Ni10Ce(6-x)Lax(x=1 to 6, at.%), Al84Ni(10-y)Ce6Lay(y=1 to 3, at.%) and Al(84-z)Ni10Ce6Laz(z=1 to 3, at.%). A method for preparing the Al-Ni-Ce-La aluminum-based amorphous alloy comprises the following steps that: after preparing materials according to the nominal components of the alloy, under the protection of argon gas, a master alloy is prepared by vacuum arc melting or vacuum induction melting; and under the protection of Ar gas, an amorphous strip is prepared by spinning, the minimum linear speed of a copper roller when in spinning is 10m/s, the melt injection pressure is 0.07 to 0.08MPa, and the vacuum degree is 2 to 10-1Pa. The invention has the advantages of reasonable component ratio, strong amorphous forming capability, simple manufacturing method and low requirement on the vacuum degree.

The invention relates to a doxycycline hydrochloride injection for animals and a preparation method for the doxycycline hydrochloride injection. The method comprises the following steps of: adding a proper amount of antioxygen and a proper amount of stabilizing agent into water for injection; then adding an aqueous solution into an organic solvent; adding doxycycline hydrochloride and a complexing agent; adjusting the pH; preserving the heat; then adding a metal ion chelant and partial antioxygen; and filtering, filling nitrogen and sterilizing to obtain the doxycycline hydrochloride injection for animals. The doxycycline hydrochloride injection prepared by the method is safe and stable; the half-life period is about 30 to 39 hours; the working time of the medicament in the body is prolonged, and the medicating frequency and the using amount are reduced; the treating effect and the treating efficiency are improved; and the doxycycline hydrochloride injection has a wide veterinary clinical application prospect.

The invention relates to a high-temperature-resistant solder capable of being used for welding gamma-TiAl alloy and a welding process thereof, and belongs to the technical field of welding manufacturing. Due to the fact that the gamma-TiAl alloy with the light and temperature-resistant structures is small in the moveable slippage coefficient, the plasticity of the material is low, the processing performance is poor, and at present, aiming at high-temperature-resistant welding of the gamma-TiAl alloy, the high-temperature-resistant solder and the welding process are lack. According to the high-temperature-resistant solder and the welding process, the Tti-Zr-Cu-Ni solder with both strength and toughness is designed, the welding of the gamma-TiAl alloy can be realized at the temperature rangeof 930-950 DEG c, the room temperature tensile strength of the joint reaches more than 90% of the strength of the matrix, namely 510-545 Mpa, the tensile strength of the joint at the temperature of 700-760 DEG c can maintain 70-82% of the strength level of the room-temperature joint, namely in the range of 389-445 Mpa; the welding temperature is lower than the heat treatment temperature and phasechange point of the matrix material, and the structure and the performance of the welded metal are not obviously influenced.

A technology of restraining junction leakage in a semiconductor device is to be provided. There is provided a semiconductor device provided with a semiconductor substrate, a gate electrode 9 formed on the semiconductor substrate, and a source/drain region formed beside the gate electrode, wherein the source/drain region 4 comprises a first impurity diffusion region including a first P-type impurity and located in the proximity of a surface of the semiconductor substrate, and a second P-type impurity diffusion region located below the first impurity diffusion region and including a second P-type impurity having a smaller diffusion coefficient in the semiconductor substrate than the first P-type impurity.

The invention relates to an epitaxial wafer for an inverted LED chip and a fabrication method of the epitaxial wafer, belongs to the technical field of epitaxy of a light emitting diode. An n-(Al<x>Ga<1-x>)<0.5>In<0.5>P potential well layer and an n-(Al<y>Ga<1-y>)<0.5>In<0.5>P barrier layer are periodically, alternatively and epitaxially grown during growth of an n-type superlattice, and a p-(Al<x>Ga<1-x>)<0.5>In<0.5>P potential well layer and a p-(Al<y>Ga<1-y>)<0.5>In<0.5>P barrier layer are periodically, alternatively and epitaxially grown during growth of a p-type superlattice. The fabrication process is simple and reasonable, the transverse motion of an electron in an n-(Al<x>Ga<1-x>)<0.5>In<0.5>P current extension layer can be effectively improved by the n-type superlattice, and the luminous efficiency of an AlGaInP epitaxial structure is further improved. With the product fabricated by the method, the luminous efficiency, the photoelectric property and the yield of an AlGaInP-based inverted LED epitaxial wafer can be effective enhanced.

The invention discloses an optical waveguide with Cu ions. An upper surface of a glass substrate is provided with a flat shape Cu ion diffusion zone which is provided with a strip shape high polarizability ion diffusion zone which is used as a core layer of the optical waveguide and has a refractive index higher than that of the glass substrate and also higher than that of the flat shape Cu ion diffusion zone. Because the strip shape high polarizability ion diffusion zone is formed based on the flat shape Cu ion diffusion zone, an ion-exchange optical waveguide has a characteristic of blue-green luminescence of the Cu ions. Meanwhile, the optical waveguide avoids a process that an ion exchange of Cu and salt forms the ion exchange of strip shape optical waveguide under a high temperature condition in the manufacturing process, has a low requirement to a mask, thereby having a lower cost.

The invention relates to a method for compositely plating Ni/CrAl/Y2O3 gradient plated layer on a T91 steel surface. The method comprises the steps of preparing CrAl/Y2O3 powder, carrying out T91 steel surface treatment and compositely plating. CrAl/Y2O3 micro nano spherical powder is obtained by controlling a high-speed milling process; an appropriate amount of CrAl/Y2O3 micro nano powder is added into a Watts plating liquid, and the Ni/CrAl/Y2O3 gradient plated layer which has excellent corrosion resistance and oxidation resistance is prepared through composite plating. The Ni/CrAl/Y2O3 gradient plated layer provided by the invention is good in bonding force with a base material, low in porosity, free of crack and unlikely to peel off, the CrAl/Y2O3 content of the plated layer from the inner layer to the outer layer changes in a linear gradient manner, and the plated layer has excellent corrosion resistance and oxidation resistance, and has the advantages of low cost and simplicity in operation and industrialization is easy to realize.