71results about How to "Facilitate large-scale mass production" patented technology

The invention relates to a prefabricated part of a composite abrasion-resistant part and a method for manufacturing the abrasion-resistant part with the same. The prefabricated part is formed by mixing metal powder with carbide ceramic particles or particles by crushing a hard alloy and sintering the mixture at a high temperature and can be made into special shapes of columns, strips, blocks, honeycombs, and the like. The method comprises the following steps of: regularly arranging prefabricated parts on the end surface of a cast form; casting liquid metal by adopting a common or negative pressure cast method; impregnating the liquid metal into the prefabricated parts to form an abrasion-resistant part of a composite material, wherein the surface layer of the abrasion-resistant part comprises a matrix metal and a composite material. The abrasion-resistant part of the composite material, which is made by using the method, ensures the wear-resistant performance of the abrasion-resistant part and has high anti-impact capability.

The invention belongs to the technical field of thin film transistors, and relates to a method for preparing a thin film transistor. The method comprises the following steps: by adopting indium-zinc alloy or indium-zinc oxide as a target material, under the room temperature, growing an indium-zinc oxide semiconductor thin film with a transparent amorphous structure on a substrate through magnetron sputtering technology, and forming a channel layer of the thin film transistor; preparing a source electrode and a drain electrode by adopting a thermal evaporation method; covering a layer of organic medium layer thin film manufactured by polyvinylpyrrolidone organic solution on the source electrode and the drain electrode by adopting a hauling or spinning method; and preparing a gate electrode on the organic medium layer thin film by adopting the thermal evaporation method. The atomic ratio of In to Zn in the target material is 0.5 to 5.0. The method can prepare a novel transparent thin film transistor with good electronic optical performance, has low preparation temperature and simple process, is favorable for large-area production, and has wide application prospect.

The invention belongs to the technical field of impregnating compounds, and discloses a glass fiber impregnating compound and a preparation method and application thereof. The impregnating compound comprises a film-forming agent, a coupling agent, a lubricant, a wetting agent and a pH regulator, wherein the film-forming agent comprises two bisphenol A type epoxy resin emulsions with different epoxy equivalents. Compared with usage of an epoxy resin emulsion with a single epoxy equivalent as a film-forming agent, the film-forming agent disclosed by the invention has the advantages that the film-forming agent can ensure sufficient coating force of the epoxy resin emulsions on the surfaces of yarns and allow the yarns to have better softness; even if the yarns are stored for a long time, theyarns still have low stiffness, which is beneficial for subsequent processing and mechanical strength of a composite material; and meanwhile, the yarns have better damp-heat resistance and still havea good strength retention rate in a high-temperature and high-humidity environment due to matched use of the film-forming agent and the coupling agent.

The invention discloses a plant source anti-bacteria type organic nutrient solution and a preparation method thereof. The plant source anti-bacteria type organic nutrient solution is prepared from a nutrient solution A and a nutrient solution B, wherein the nutrient solution A is prepared from biogas slurry and organic matter decomposed liquid, and the nutrient solution B is prepared from dandelions, houttuynia cordata, radix scutellariae, honeysuckles, radix isatidis and coptis chinensis. The preparation method comprises the steps that the nutrient solution A is prepared from the biogas slurry and the organic matter decomposed liquid; the dandelions, the houttuynia cordata, the radix scutellariae, the honeysuckles, the radix isatidis and the coptis chinensis are smashed, grinded and sieved, traditional Chinese medicine mixture fine powder is obtained and added into water to be soaked, sieving is conducted to remove impurities and residues, a rough filtered solution is obtained, sieving is conducted on the rough filtered solution, and the nutrient solution B is obtained; and the nutrient solution A and the nutrient solution B are mixed, namely the plant source anti-bacteria type organic nutrient solution is obtained. According to the prepared plant source type organic nutrient solution, organic components are used as raw materials completely, damage to the soil and environment does not exist, nutrition is rich, cost is low and the antibacterial effect is significant.

The invention discloses a preparation method of a high-hardness conductive carbon-based thin film. The preparation method of the high-hardness conductive carbon-based thin film comprises the steps ofplacing an ultrasonically cleaned conductive metal workpiece in a vacuum chamber of a vacuum coating device, and carrying out ion etching and activating; then adopting a bipolar pulse direct-current power supply, sequentially passing through a Cr metal target and a WC target, and forming a Cr-WC transition layer; preparing a hydrogen-containing amorphous diamond-like coating on the Cr-WC transition layer; and rising the temperature to 430 to 600 DEG C in a heat treatment device, preserving heat, and obtaining the high-hardness conductive carbon-based thin film. According to the preparation method of the high-hardness conductive carbon-based thin film provided by the invention, in the diamond-like coating (DLC), the content of sp3C-C is high, high hardness is obtained, meanwhile, the conductivity is reduced, and the diamond-like coating / carbon-based thin film with high adhesion, high hardness and conductivity equivalent to graphite is obtained.

The invention discloses an ultra-thick DLC coating. The ultra-thick DLC coating comprises a double-layer modulation structure periodically arranged on the surface of a base material, wherein the modulation structure comprises a soft layer and a hard layer which is laid on the soft layer, and the soft layer and the hard layer are alternately arranged on the surface of the base material in a periodic mode. The ultra-thick DLC coating not only can solve the problem that a film layer is automatically cracked due to the internal high stress when a thickness of a hard phase is increased, but also can greatly improve the overall hardness of the film layer, and meanwhile, the ultra-thick DLC coating has excellent wear resistance, so that application prospect is wide; and meanwhile, according to the preparation method, the modulation period of the soft layer-hard layer double-layer modulation structure or the period number of the soft layer-hard layer double-layer modulation structure are adjusted, the DLC coating with the specific thickness is prepared to meet the actual production requirements, and the operation process is simple and facilitates large-scale batch production.

The invention discloses a preparation process for a novel red-rooted salvia root ultrafine powder particle traditional Chinese medicine decoction piece. The process includes the following steps: washing of red-rooted salvia roots, rough processing of red-rooted salvia roots, drying, material inspection, low-temperature ultrafine grinding, pelletization, semifinished product inspection, packaging and the like. The process is strictly controlled in order to guarantee the safety and acceptability of the finished product, and the red-rooted salvia root ultrafine powder particle traditional Chinese medicine decoction piece prepared by the process can be blended into suspension, soak or decoction and taken. Since ultralow-temperature grinding is used by the preparation process, the natural medicinal ingredients of the red-rooted salvia root are kept, the prepared traditional Chinese medicine decoction piece can be rapidly dissolved out, the dissolution amount is large, the extract content of the traditional Chinese medicine decoction piece is more than 20 percent higher than the extract content of the conventional decoction piece when the extract determination method of Chinese pharmacopoeia (2011 edition) is used for measurement, and thereby medicinal material resources are greatly saved; the time of decocting the traditional Chinese medicine decoction piece is shortened by more than five times in comparison with the time of decocting the conventionally formulated decoction piece; excipients are not added, and the physical and chemical properties of the red-rooted salvia root are not changed; and because the traditional Chinese medicine decoction piece is packaged in a porous soak bag and an aluminium foil bag, the decoction piece cannot be damped.

The invention discloses a thulium-doped sodium yttrium fluoride laser crystal and a preparation method thereof. Tm<3+> rare earth ions are doped into a NaYF4 crystal to generate a monocrystal of which the chemical formula is NaY(1-alpha)TmalphaF4. The lithium yttrium fluoride monocrystal has the advantages of high solubility for Tm<3+> ions and favorable thermal, mechanical and chemical stability. The rare earth ions doped in the monocrystal have high luminescence efficiency; and by adopting a water-free oxygen-free sealed crucible descending process and carrying out high-temperature fluoridation treatment on the raw material, the preparation method can be used for preparing the high-quality crystal which is almost free of hydroxide ions and oxides. Under the excitation of an 800nm-wavelength LD, the crystal has strong 1.8 mu m fluorescence emission; and the obtained crystal has long fluorescence lifetime in the 1.8 mu m wave range, and thus, can be used as a middle-infrared laser crystal in a laser unit.

The invention relates to the technical field of impregnating agents, and discloses a film forming agent suitable for glass fibers, an impregnating agent comprising the same, and a preparation method and applications of the impregnating agent. The film forming agent comprises emulsified bisphenol A type epoxy resin and polyester type polyurethane. Through the emulsification effect of a surfactant, the interfacial energy of a system is reduced, the stability of epoxy resin emulsion is improved, and thus the function of the epoxy resin emulsion can be better exerted. The polyester polyurethane film forming agent has a large molecular weight and a strong yarn-wrapping performance and easily forms a compact film on the surface of glass fibers, thus the glass fibers are isolated from the external environment, water will not enter the cracks of the glass fibers, the elasticity and wear resistant performance of yarns are improved, the anti-fatigue performance of yarns is strengthened, at the same time, the bundling force is high, and the phenomenon of yarns such as natural draping, non-uniform tension force, and the like, is effectively relieved.

The invention relates to a preparation method of a variable color nanofiber film, which comprises the following steps: 1, weighing a high polymer by an electronic scale, dissolving the high polymer in an organic solvent, and sufficiently dissolving the high polymer to obtain high polymer solution; 2, weighing an acid-base indicator of which solute mass is 4 percent to 6 percent of that of the high polymer solution by the electronic scale, dissolving the acid-base indicator in the high polymer solution, and sufficiently dissolving the acid-base indicator to obtain bubble electrostatic spinning solution; and 3, setting a proper spinning voltage and receiving distance, and adopting bubble electrostatic spinning to obtain the nanofiber film on a receiving plate. According to the invention, the excellent characteristics of nanofibers are combined with the variable color property of the acid-base indicator, and the color of the obtained nanofiber film can be changed in solution with different pH values. The preparation method is simple in preparation process, low in cost and high in yield, and is convenient for large-scale batch production.

The invention relates to a carbon nano-tube-porous carbon composite material preparation method, which comprises: dispersing lamellar porous magnesium oxide in water to obtain a suspension, adding a nickel nitrate solution into the suspension in a dropwise manner, uniformly mixing, carrying out suction filtration, drying the filter residue, crushing, and calcining to obtain a carbon tube templateagent; adding the carbon tube template agent and a carbon precursor into a solvent according to a weight ratio of 0.5-10:1, uniformly mixing, drying, calcining at a high temperature under protective gas, cooling, and taking out to obtain black powder; and washing with an acid, rinsing with deionized water to achieve a neutral state, performing suction filtration, and drying to obtain the carbon nano-tube-porous carbon composite material. According to the present invention, the method has characteristics of simple operation and low cost, is suitable for large-scale batch production, and can achieve the synchronous regulation of the morphology and the structure of carbon nano-tube-porous carbon; and the prepared composite material reserves the lamellar morphology of the template, has the hierarchical pore distribution of mesopores and micropores, has characteristics of high conductivity and rich pore structure, and can be used as an electrode material, a catalytic material or a catalystcarrier in the fields of energy storage, catalysis and the like.

The invention provides a method for preparing zirconium oxide nanometer fiber through bubble spinning. The method comprises the following concrete steps of at room temperature, firstly, dissolving zirconium salts into a solvent; then, performing mixing and stirring with nanometer particles for inhibiting the growth of zirconium oxide colloidal particles by using a dispersing agent; adding polymers to obtain a bubble spinning solution; inputting the spinning solution into a liquid storage pool of bubble spinning equipment; meanwhile, connecting a positive electrode spinning jet to a high-voltage power supply to perform bubble spinning; obtaining a composite nanometer fiber membrane on a negative electrode receiving plate; performing pre-oxidation in a baking oven; then, putting the composite nanometer fiber membrane into a vacuum box type furnace to be subjected to calcination treatment; then, putting the composite nanometer fiber membrane into a muffle furnace to be subjected to high-temperature calcination; finally obtaining the zirconium oxide nanometer fiber membrane. The method provided by the invention has the advantages that the preparation process is simple; the cost is low; the volume of production is great; the scale mass production can be conveniently realized; meanwhile, good high-temperature-resistant performance is realized; the application prospects are wide.

The invention discloses a tissue engineering urethra stent and a preparation technology thereof, and relates to the technical field of high molecular materials. Specifically, through the preparation technology, a tissue engineering urethra stent which is suitable for different individuals can be prepared, and through the preparation technology, large-scale batch production can be facilitated. Secondly, the tissue engineering urethra stent prepared through the preparation technology has favorable biocompatibility, favorable biodegradability and favorable bio-mechanical properties; and through the microcosmic porous structure of the tissue engineering urethra stent, adhesion and proliferation of seed cells can be guaranteed, and the tissue engineering urethra stent can carry the seed cells of large enough quantity, is suitable for urethra damage of different forms, and is particularly suitable for repair of long-segment urethra damage.

The invention discloses a light artificial board with a zig-zag inner core and a preparation method thereof. The artificial board is composed of face boards, vertical partition boards, supporting sheets and surrounding boards. The artificial board is provided with the upper face board and the lower face board; and the plurality of parallel vertical partition boards are arranged between the two face boards, the board surfaces of the vertical partition boards are perpendicular to the board surfaces of the face boards, and the two sides of the vertical partition boards are fixedly connected withthe two face boards correspondingly. The supporting sheets are arranged in a 'zigzag' shape between every two adjacent vertical partition boards, the supporting sheets are perpendicular to the face boards, and the two ends of the supporting sheets are fixedly connected with the vertical partition boards. Gaps around the periphery of the upper and lower face boards are covered with the surroundingboards. The connection among the parts mainly adopts mortise and tenon structures, the material used by the artificial board is small, the inner space of the board is large, the structure is firm, andthe artificial board has the advantages of small weight, high strength and good sound insulation and heat insulation performance. The preparation method of the light artificial board is simple, and large-scale batch production is facilitated.

The invention discloses an Ho<3+> / Yb<3+> double doped Alpha-NaYF4 laser crystal and a preparation method thereof. The preparation method is characterized in that KF is taken as a fluxing agent, and is added in the raw materials of NaF, YF3, HoF3 and YbF3 to generate the Ho<3+> / Yb<3+> double doped Alpha-NaYF4 laser crystal. The preparation method has the advantages that because a certain quantity of KF (of which the melting point is 858 DEG C) is added in the initial raw materials as the fluxing agent, the fluxing agent KF reduces the melting point of the Alpha-NaYF4 laser crystal, and changes the phase equilibrium relation in the melt; when primary crystallization is begun in the melt, only solid phase of the Alpha-NaYF4 and other liquid phase are separated; the Alpha-NaYF4 laser crystal with a relatively large size is obtained eventually along with nucleus formation and growth of the Alpha-NaYF4 crystal; the NaYF4 monocrystal is high in solvability to rare earth, and has good thermal, mechanical and chemical stability; rare earth ions doped in the monocrystal are high in luminous efficiency.

The invention discloses a placental tissue preservation liquid and a preparation method thereof. The placental tissue preservation liquid includes glucose injection, a serum replacement, gentamicin, amphotericin, trehalose and heparin lithium. The preparation method of the placental tissue preservation liquid includes adding the serum replacement, gentamicin, amphotericin B, magnesium ascorbyl phosphate hydrate, trehalose and heparin lithium into the glucose injection, wherein final concentrations of the ingredients are 0.5-2%, 800 U / mL, 15-30 ug / mL, 0.25-0.5 mg / mL, 0.6-3 mg / mL, and 20-40 U / mL. The placental tissue preservation liquid has clear composition and balanced nutrition, has no evident toxic and side effects on cells, can well maintain activity of in-vitro placental cells, and iseffective in preventing contamination of exogenous microorganisms introduced in the acquisition and transport steps.

The invention relates to a baking tray iron bar forming production line, and belongs to the technical field of baking tray machining equipment. The baking tray iron bar forming production line comprises a straightening platform, a shearing platform, a conveying platform and a welding platform. The straightening platform, the shearing platform, the conveying platform and the welding platform are sequentially connected together. The straightening platform is fixedly provided with a straightening wheel support, and the straightening wheel support is sequentially provided with a plurality of pairs of straightening wheel assemblies in the horizontal direction. The shearing platform is fixedly provided with a shearer. The welding platform is fixedly provided with four sets of positioning mechanisms in sequence in the horizontal direction, the positioning mechanisms comprise positioning idler wheels and positioning blocks which are arranged face to face, and air cylinders are obliquely arranged beside the positioning idler wheels. A welding machine is arranged at the center of the welding platform. The baking tray iron bar forming production line is simple, compact and reasonable in structure, high in product standardization degree for assembly line production, free of difference in product quality, beneficial to large-scale mass production, and capable of greatly improving production efficiency and lowering production cost.

The invention discloses a high-precision low-cost heterogeneous laser gyro north seeker, which belongs to the technical field of north seeking of inertial navigation systems, and comprises a first base and an inertial measurement unit, wherein first grooves are formed in the upper end, the lower end, the left end, the right end, the front end and the rear end of first base correspondingly; the inertial measurement unit is arranged on the first base and is used for realizing inertial device data acquisition; the inertial measurement unit comprises a first 50-type laser gyroscope, a second 50-type laser gyroscope and a 90-type laser gyroscope, can measure the movement angular velocity of the inertial measurement unit relative to an inertial space and forms a pulse signal, the first 50-type laser gyroscope is fixedly arranged in the first groove in the left side of the first base, the second 50-type laser gyroscope is fixedly arranged in the first groove in the upper side of the first base, and the 90-type laser gyroscope is fixedly arranged in the first groove in the front side of the first base. On the premise that high-precision north-seeking measurement is guaranteed, the cost, the size and the weight of the equipment are reduced, and use, maintenance and batch production of the equipment are facilitated.

The invention discloses a silica gel spectacle frame and a preparation technology thereof. The preparation technology comprises the steps of mixing raw silica gel with filler, continuing to add a vulcanizing agent, a catalyst and a chain extender and evenly stirring to obtain a pre-injection sizing material; injecting the pre-injection sizing material into moulds of spectacle legs, the spectacle frame and connection parts, vulcanizing the sizing material and release pressure to normal pressure after vulcanizing; curing, cooling and demoulding obtained prefabricated parts; connecting and assembling silica gel finished products of the obtained spectacle legs, the spectacle frame and the connection parts through metal screws and nuts to obtain the silica gel spectacle frame. The silica gel spectacle frame prepared by the preparation technology disclosed by the invention has extremely high biocompatibility and skin comfort degree, convenience in wearing and easiness in maintenance.

The invention relates to a prefabricated part of a composite abrasion-resistant part and a method for manufacturing the abrasion-resistant part with the same. The prefabricated part is formed by mixing metal powder with carbide ceramic particles or particles by crushing a hard alloy and sintering the mixture at a high temperature and can be made into special shapes of columns, strips, blocks, honeycombs, and the like. The method comprises the following steps of: regularly arranging prefabricated parts on the end surface of a cast form; casting liquid metal by adopting a common or negative pressure cast method; impregnating the liquid metal into the prefabricated parts to form an abrasion-resistant part of a composite material, wherein the surface layer of the abrasion-resistant part comprises a matrix metal and a composite material. The abrasion-resistant part of the composite material, which is made by using the method, ensures the wear-resistant performance of the abrasion-resistantpart and has high anti-impact capability.

The invention discloses a terbium / ytterbium rare earth ion codoped lithium gadolinium lutetium fluoride upconversion luminescent crystal and a preparation method thereof. Gd is introduced into a LiLuF4 crystal substrate, and Yb<3+> and Tb<3+> rare-earth luminescent ions are simultaneously doped to generate a monocrystal of which the chemical formula is LiLu(1-alpha-beta-gamma)GdalphaYbbetaTbgammaF4. The fluoride monocrystal has the advantages of low growth temperature, uniform distribution of Yb<3+> and Tb<3+>, high solubility, and favorable thermal, mechanical and chemical stability. The rare earth ions doped in the monocrystal have high luminescence efficiency; and by adopting a water-free oxygen-free sealed crucible descending process and carrying out high-temperature fluoridation treatment on the raw material, the preparation method can be used for preparing the high-quality crystal which is almost free of hydroxide ions and oxides. Under the excitation of 960nm-wavelength light and under the synergic energy transfer actions of Yb<3+> and Tb<3+>, strong 500nm fluorescence emission can be obtained; and the luminescent crystal is hopeful to be used as night light in the field of infrared detection, biological markers, long-afterglow luminescence warning markers, fireproof channel indicators or indoor wall painting.

The invention discloses a thulium-doped lithium gadolinium lutetium fluoride middle-infrared laser crystal and a preparation method thereof. Tm<3+> rare earth ions are doped into a LiLuGdF crystal to generate a monocrystal of which the chemical formula is LiLu(1-alpha-beta)GdalphaTmbetaF4. The fluoride monocrystal has the advantages of low growth temperature, uniform distribution of Tm<3+>, high solubility, and favorable thermal, mechanical and chemical stability. The rare earth ions doped in the monocrystal have high luminescence efficiency; and by adopting a water-free oxygen-free sealed crucible descending process and carrying out high-temperature fluoridation treatment on the raw material, the preparation method can be used for preparing the high-quality crystal which is almost free of hydroxide ions and oxides. Under the excitation of an 800nm-wavelength LD, the crystal has strong 1.8 mu m fluorescence emission; and the obtained crystal has long fluorescence lifetime in the 1.8 mu m wave range, and thus, can be used as a middle-infrared laser crystal in a laser unit.

The invention discloses a vibration energy collection device which comprises a vibration mechanical energy conversion device and a collection device. The vibration mechanical energy conversion device comprises a permanent magnet group, an upper iron core, a lower iron core, a fixed middle shaft, a coil, a spring piece, a winding support and a shell. The permanent magnet group is formed by superposing two magnets, adjacent magnet surfaces have the same polarity, a magnetic conductive gasket is arranged between the adjacent magnet surfaces, the permanent magnet group is fixed between the upper and lower iron cores, and the permanent magnet group and the upper and lower iron cores are positioned and fastened by the fixed middle shaft. A groove is formed in the outer surface of a wire mold, a conductive coil is arranged in the groove, the wire mold is fixed on the winding support, and a fixing cover and upper and lower bottom covers are arranged above and below the shell respectively. The collection device comprises a rectifying circuit, a voltage stabilizing circuit and an energy storage unit, and the collection device is placed in the shell. Vibration mechanical energy in the environment is converted into electric energy, stable direct-current voltage is output, a traditional battery power supply mode can be replaced, the trouble of frequent battery replacement is avoided, environmental pollution is reduced, use is convenient, and maintenance is not needed.

The invention discloses a Tb<3+> / Eu<3+> / Tm<3+>-doped alpha-NaYF4 single crystal for a white LED (light emitting diode) and a preparation method thereof. The preparation method is characterized in that KF (potassium fluoride) is used as a cosolvent and added into NaF, YF3, TbF3, EuF3 and TmF3 raw materials to generate the Tb<3+> / Eu<3+> / Tm<3+>-doped alpha-NaYF4 single crystal. The single crystal and the preparation method thereof have the advantages that a certain quantity of KF (the melting point is 858 DEG C) serving as a cosolvent is added into the initial raw materials, and the cosolvent KF reduces the melting point of the alpha-NaYF4 crystal and changes the phase equilibrium relation in a melt, so that when crystal is preliminarily separated from the melt, only alpha-NaYF4 solid-phase crystals and other liquid-phase crystals are separated out, and large-sized alpha-NaYF4 crystal is finally obtained with the nucleation and growth of alpha-NaYF4 crystal; the sodium yttrium fluoride single crystal has high rare earth dissolubility, and has good thermal, mechanical and chemical stability; and the light emitting efficiency of rare earth ions doped with the single crystal is high.

The present invention relates to a mehtod for raising ornamental and popular science silkworm by using artificial feed, which is characterized by that said invention adopts scale production method to raise small silkworms into large silkworms, then distributes them together with sterilized wet artificial feed, special feeding device and feeding observation manual to silkgrowers to teen-ager respectively to raise them, so that it can make silkgrowers to teen-ager not only enjoy the silkworms, but also obverse their growth and development process to easily obtain popular science knowledge.

The invention provides a food for preventing urinary stone of a pet dog and a preparation method of the food. The food for preventing the urinary calculi of the pet dogs comprises the following raw materials in parts by weight: 100-300 parts of cattle bone powder, 10-50 parts of fish meal, 20-35 parts of beet fibers, 1-5 parts of celery powder, 10-30 parts of carrot powder, 10-15 parts of soybean meal, 5-10 parts of dandelion powder, 1-5 parts of vitamin C and 1-5 parts of vitamin E. The pet dog food can effectively prevent initial formation of calcium oxalate urinary stones of pet dogs, and further reduces the risk that pet dogs suffer from urinary stones.

The invention relates to an aluminum silicon carbide material which comprises aluminum and a silicon carbide prefabricated part. The aluminum silicon carbide material is characterized in that the silicon carbide prefabricated part is prepared from the following raw materials in parts by weight: 100 parts of silicon carbide particles, 1 to 10 parts of metal nitrate and 1 to 10 parts of a binding agent. The raw materials of the aluminum silicon carbide material contain metal nitrate, the metal nitrate can be thermally decomposed to generate corresponding metal oxide, connection between silicon carbide particles is enhanced, the strength of a silicon carbide prefabricated part is improved, and large-scale mass production is facilitated; and metal oxide generated by pyrolysis is attached to the surfaces of the silicon carbide particles so that oxidation of part of the silicon carbide particles can be effectively inhibited, generation of silicon dioxide is reduced, and the thermal conductivity of the aluminum-silicon carbide material is improved.

A W-W2N metal-ceramic nanometer multi-layer coating comprises modulation structures periodically arranged on the surface of a substrate material; the modulation structures are composed of soft phasesand hard phases to be periodically and alternately arranged on the surface of the substrate material; a magnetron sputtering preparation method of the W-W2N nanometer multi-layer coating includes thefollowing steps that (1) the substrate material is provided, and organic matter adhering to the surface of a substrate is removed; (2) the substrate material is fast dried and contained into a vacuumchamber, bombardment is performed on the substrate material with Ar+ion beams, oxygen atoms on the surface of the substrate are removed, and vacuumizing continues; and (3) the vacuum chamber is filledwith argon and nitrogen mixed gas, and before deposition of the multi-layer coating, firstly deposition of a W2N transition layer is performed; and (4) the vacuum chamber is periodically filled withhigh-purity argon and the mixed gas, and metal phase W layers and ceramic phases W2N layers are correspondingly obtained; the modulation period and the modulation ratio in the multi-layer coating arecontrolled; the high strength and toughness W-W2N nanometer multi-layer coating is obtained, and the characteristics that the potential application value is high and the strengthening and toughening effect is good are achieved.

The invention discloses a polyether-ether-ketone (PEEK) 3D printing material and a 3D printing forming method thereof. The method comprises the following steps: dissolving PEEK in concentrated sulfuric acid to obtain sulfonated PEEK; dissolving methylene-bisacrylamide (MBA) in water to obtain an MBA solution; mixing sulfonated PEEK with the MBA solution to obtain PEEK-MBA; drying PEEK-MBA, mixingdried PEEK-MBA with PEI (polyetherimide), and performing blending extrusion with a twin-screw extruder to obtain a PEEK-MBA-PEI blend; adding the PEEK-MBA-PEI blend to a conical counter-rotating twin-screw extruder for extrusion forming to obtain a PEEK-MBA-PEI wire, namely, the PEEK 3D printing material. The PEEK material is modified, and the modified PEEK material can be applied as the 3D printing material. The 3D printing forming method of the 3D printing material is also provided.

The invention provides a pixel compensation circuit. The pixel compensation circuit comprises seven switches, a storage capacitor, an organic light emitting diode, four signal sources and three inputvoltages. The time sequence of the four signal sources can be divided into an initial stage, a programming stage and a light emitting stage in sequence. Through the matching with the timing sequence high and low levels of the four signal sources, the current flowing through the organic light emitting diode in the light emitting stage of the display is not influenced by the threshold voltage and the anode voltage of the OLED, the drifting of the threshold voltage is effectively compensated, and the problems of uneven brightness and aging of the display panel are further improved.