40 results about "Glassy carbon" patented technology

The invention provides a preparation method of a plate-shaped glassy carbon electrode, which comprises the following steps: curing a resin raw material into a plate-shaped resin block, carbonizing in an inert atmosphere, and respectively introducing a nitrogen source and a boron source for doping operation to obtain a co-doped plate-shaped resin block precursor; placing the co-doped plate-shaped resin block between two porous graphite plates, and carrying out high-temperature treatment to obtain a glassy carbon matrix; and immersing the glassy carbon substrate into the adhesion layer solution to form an adhesion layer, transferring the adhesion layer into a deposition solution which comprises a bismuth-containing solution and a gold-containing solution, forming bismuth-gold nano-dots on the adhesion layer, and washing and drying the bismuth-gold nano-dots to obtain the plate-shaped glassy carbon electrode. Through directional arrangement of crystal orientations, the tantalum carbide coating achieves higher electrical conductivity and thermal conductivity. And the sensitivity and the service life of the plate-shaped glassy carbon electrode are obviously improved and prolonged.

The invention belongs to the field of polyurethane materials, and particularly discloses a flame-retardant polyurethane material as well as a preparation method and application thereof. The flame-retardant polyurethane material comprises the phosphorus flame retardant, the melamine polyphosphate and the barium metaborate, the phosphorus flame retardant, the melamine polyphosphate and the barium metaborate have a synergistic effect, a continuous, compact and glassy-state-like carbon barrier layer is formed at the burning position of the material, halogen-free flame retardance of the polyurethane material can be achieved, and molten drops can be effectively prevented. Besides, the polyurethane material disclosed by the invention is proper in component and dosage, so that the material formability is good, bubbles and flame retardant precipitation after the material is formed can be avoided, and the utilization rate of the flame retardant is increased.

The utility model provides a high-melting-point graphite pipe for elemental analysis, which belongs to the technical field of spectral analysis and comprises a circular hollow graphite pipe main body and transverse support parts symmetrically arranged on two sides of the graphite pipe main body, an inner pyrolytic carbon layer is deposited on the inner wall of the graphite pipe, a porous structure is arranged in the inner pyrolytic carbon layer, and an outer compact pyrolytic carbon layer is further deposited on the surface of the inner pyrolytic carbon layer. Through the inner pyrolytic carbon layer and the outer compact pyrolytic carbon layer, in the high-temperature working process, the inner wall pyrolytic carbon layer can be selectively consumed to form a compact glassy carbon film, a self-adaptive protection mechanism enables the graphite tube to still keep stable analysis performance under extreme conditions, reaction or permeation of a detected element and graphite at high temperature is reduced, and the analysis accuracy of the graphite tube is improved. The phenomenon of cross contamination is reduced, the memory effect of the graphite pipe is reduced by 70%, but the memory effect of a traditional pyrolytic graphite pipe can only be reduced by 30-40%, and the graphite pipe is particularly suitable for analysis of high-melting-point elements.

A header rail 10 for transporting gas cylinders (30, fig 3) on lorries has an elongate non-metal (e.g. composite such as glass / carbon fibre) central core 12, with metal collars 14 spaced apart along t

The application provides a glass carbon mold and a recrystallized silicon carbide product and a preparation method, and belongs to the technical field of ceramic material preparation. Microcrystalline cellulose is mixed with water, and the obtained mixture is formed to obtain a cellulose body; the cellulose body is subjected to a stabilization treatment in an oxygen-containing atmosphere to obtain a stabilized body; and the stabilized body is subjected to a carbonization treatment in a protective atmosphere to obtain the glass carbon mold. The glass carbon mold is used to prepare the recrystallized silicon carbide product, which is convenient for directly forming a complex green body and can be sintered together with the product, solves the problem that the green body is easily damaged and deformed in the transfer process, and is environmentally friendly.

A superstructural glassy carbon, a preparation method therefor and a use thereof. Firstly, provided is a superstructural glassy carbon having a stable structure with uniformly distributed anisotropic stress. Secondly, also provided are a preparation method and a use of the superstructural glassy carbon, and a bone repair material obtained on the basis of the superstructural glassy carbon.

Disclosed herein is a battery for generating hydrogen. The battery comprises a working electrode; a reference electrode; a counter electrode; the electrolyte is sulfuric acid with the concentration of about 0.5 M; wherein the working electrode is prepared by coating a layer of ink on a glassy carbon electrode and air-drying the glassy carbon electrode; and the ink is prepared by mixing the TMD composite material decorated by platinum nanoparticles with a solution to form a mixture and carrying out ultrasonic treatment on the mixture, and the solution is composed of water, ethanol and 5% sulfonated tetrafluoroethylidene fluorinated polymer-copolymer dispersion according to a volume ratio of 4: 1: 0.1.

Disclosed herein are the synthesis and characterisations of the monoacrylate-functionalised phthalonitriles (PNs). Their chemical structures are verified with 1H nuclear magnetic resonance (NMR) and Fourier transform infrared (FT-IR) spectra to confirm the successful synthesis. Subsequently, photopolymerisable resins, based on the prepared PN monomer, a commercial diacrylate and other additives can be formulated. Being post thermally treated, the PN based resins result in polymeric products with excellent thermal and mechanical performances, suggesting the high-performance nature of the PN based resins. Interestingly, the resins exhibit significant high carbon yield, indicating that they are greatly promising candidates as carbon precursors. As it is found that the resins have good three-dimensional (3D) printing capability and can be fabricated using high-resolution projection micro-stereolithography (PμSL) additive manufacturing technology, complex 3D structured objects are herein printed and performed follow-up post treatment. After being progressively pyrolysed up to 1000° C., the printed objects can be readily converted to glassy carbon (GC) structures with structural integrity and fidelity. Only ˜25% of shrinkage was found for the converted GC structure due to the significantly high char yield of the PN resins. This work not only expands the library of new class of high-performance PN resins for popular additive manufacturing but also features the precision 3D printing of GC with low shrinkage and high carbon yield for the first time.

An object of the present disclosure is to provide a grip rubber composition from which a crosslinked rubber having a great static frictional coefficient can be obtained. The present disclosure provides a grip rubber composition containing a base rubber, hard porous carbon particles and a vulcanizing agent, wherein at least one part of the hard porous carbon particle is composed of a glassy carbon, and an amount of the hard porous carbon particles ranges from 1.5 mass % to 8.5 mass % in 100 mass % of the rubber composition.

The invention discloses an immunosensor for detecting porcine epidemic diarrhea virus as well as a preparation method and a detection method of the immunosensor. The preparation method of the immunosensor for detecting the porcine epidemic diarrhea virus comprises the following steps: S1, sequentially adding H2O2 and concentrated nitric acid into an aqueous solution of tungstate for reaction to obtain a modification solution; s2, performing electrochemical deposition on the glassy carbon electrode by taking the modification liquid as electrolyte; s3, taking an aniline solution composed of concentrated sulfuric acid, aniline and water as an electrolyte, and performing electrochemical polymerization on the glassy carbon / tungsten oxide electrode; s4, placing the glassy carbon / tungsten oxide / polyaniline electrode in a chloroauric acid solution for electro-deposition; s5, dispensing a porcine epidemic diarrhea virus antibody on the surface of the glassy carbon / tungsten oxide / polyaniline / gold electrode, and incubating; and S6, dropwise adding bovine serum albumin on the surface of the glassy carbon / tungsten oxide / polyaniline / gold-antibody electrode, and sealing. The sensor has the advantages of high detection speed, high stability, strong anti-interference performance and the like.

The present application discloses a conductive high-strength diamond / amorphous carbon composite material and a preparation process thereof. The diamond / amorphous carbon composite material is composed of an amorphous carbon continuous phase and multiple separate diamond phases embedded in the amorphous carbon continuous phase, wherein the diamond phases exhibit an ordered sp3 hybrid state, and the amorphous carbon continuous phase exhibits a disordered sp2 hybrid state. The present application further discloses a process for preparing the above diamond / amorphous carbon composite material. The process comprises using sp3 carbon powder or glassy carbon as a raw material to obtain the above-mentioned material by sintering. The diamond / amorphous carbon composite material shows good electrical conductivity, good electrical discharge machining ability, good chemical stability and light weight, and has broad application prospects in aerospace, automobile industry and biomedical equipment.

A cutting blade(2), which can cut an insulating film while suppressing exfoliation of the insulating film such as a Low-k film that is likely to be exfoliated upon cutting, is demanded. A cutting blade(2), that can meet this demand, has a binder(2b) and abrasive particles(2a), in which the abrasive particles(2a) are fixed by the binder(2b) at least part of which is glassy carbon. The most suitable drawing: Fig. 1.

This application relates to a grouting material based on tailings sand and its preparation method, belonging to the field of grouting material technology. The grouting material based on tailings sand comprises component A and component B. This application utilizes lead-zinc tailings sand placed in an alkaline environment to enhance the gelation activity of its main component, feldspar. Through proper proportioning, it rapidly solidifies and maintains high strength under the combined action of water glass, sodium carbonate, and calcium hydroxide. Furthermore, the grouting material uses commonly used raw materials, ensuring ample market supply and convenient procurement. It also enables the resource utilization of tailings sand, resulting in significant economic and social benefits.

The invention discloses a lead ion ultra-trace detection method based on a non-mercury film modified microarray electrode technology, which comprises the following steps: providing a microarray working electrode composed of a plurality of glassy carbon microelectrode units, and carrying out mechanical polishing and / or electrochemical activation on the exposed surface of the microarray working electrode; the microarray working electrode, a reference electrode and a counter electrode are jointly placed in a modification solution containing a non-mercury electroactive substance, a continuous non-mercury electroactive film layer is formed on the exposed surface of each glassy carbon microelectrode unit through electrochemical deposition, and the non-mercury electroactive film layer is in direct electric contact with a glassy carbon substrate; placing the microarray working electrode modified by the non-mercury electroactive film layer, a reference electrode and a counter electrode in a buffer electrolyte, and carrying out electrochemical cleaning; a to-be-detected sample and a buffer solution are mixed to form a to-be-detected solution, the to-be-detected solution is put into a three-electrode system, anodic stripping scanning is conducted through differential pulse voltammetry or square wave voltammetry, and the lead ion concentration in the sample is determined. The method does not need complex pretreatment, the detection limit reaches 0.1 mu M (20 mu g / L), and lead ions in complex matrixes such as clinical serum and the like can be rapidly and accurately detected.

A wafer lift pin that is inserted in an insertion hole of a susceptor in a semiconductor production apparatus so as to be movable in a vertical direction and is used for lifting a silicon wafer placed on the susceptor includes: a rod-shaped base material made from glassy carbon; and an SiC film that is formed by a CVD method and coats a surface of the base material, wherein at least a sliding portion with an inner side of the insertion hole of the susceptor is coated with the SiC film; when the surface of the SiC film is observed with a scanning electron microscope, the surface of the wafer lift pin in an observation visual field is entirely coated with SiC particles, and a ratio of an observed area of small SiC particles having a particle diameter of 2.00 µm or smaller to a total area coated with the SiC film in the observation visual field is 50% or more; and a portion abutting against the silicon wafer is not coated with the SiC film. According to the present invention, there can be provided a wafer lift pin in which the cracking of the SiC film originating in the difference in the coefficient of thermal expansion between the SiC film and the glassy carbon resists occurring when the formed SiC film is cooled.

The present invention is a base substrate for a single-crystal diamond laminate substrate. The base substrate comprises: an initial substrate that has a linear expansion coefficient smaller than that of single-crystal α-Al2O3 and equal to or greater than 0.5 × 10−6 / K, the initial substrate containing at least one of amorphous carbon, glassy carbon, polycrystalline diamond, and single-crystal diamond; a single-crystal α-Al2O3 layer on the initial substrate; and a heteroepitaxial layer composed of any of an iridium film, a rhodium film, and a platinum film on the single-crystal α-Al2O3 layer. The present invention thereby provides a base substrate that has a large area (large diameter) and high crystallinity and is capable of forming a high-quality single-crystal diamond layer having high purity and low stress.

This invention provides a method for preparing a glassy carbon graphite electrode, comprising: S1, preparing a graphite electrode; S2, preparing a glassy carbon graphite electrode: step S2 specifically includes: S21, coating the surface of the graphite electrode prepared in step S1 with phenolic resin; S22, curing the graphite electrode coated with phenolic resin obtained in step S21 at room temperature to obtain a graphite electrode coated with a glassy carbon precursor; S23, carbonizing the graphite electrode coated with the glassy carbon precursor obtained in step S22 in an oxygen-free environment at a high temperature of 1000℃ to obtain a primary glassy carbon graphite electrode product; S24, heat-treating the primary glassy carbon graphite electrode product obtained in step S23 at a high temperature of 2000℃~3000℃ to obtain a high-purity glassy carbon graphite electrode. This invention, by coating the surface of the graphite electrode with a glassy carbon layer, can form a protective layer on the surface of the graphite electrode, preventing graphite in the graphite electrode from escaping at high temperatures, thereby reducing the carbon content in the polycrystalline silicon rod.

A carbon composite channel (10) and method of manufacturing a carbon composite channel. The method entails applying layers of carbon fiber alternatingly in a circumferential and an axial direction, applying liquid carbon, a liquid carbon-containing solution, or a liquid pre-cursor for glassy carbon to one or more layers of carbon fiber before applying the next layer of carbon fiber, and subsequently curing the pre-cursor by exposure to a heat treatment at a temperature below 1200° C.

The invention belongs to the technical field of semiconductors, and discloses a composite coating for a semiconductor device and a preparation method thereof.The preparation method comprises the following preparation steps that organic resin and a carburant are added into an alcohol solvent to be evenly mixed, and a resin solution is obtained; the method comprises the following steps: adding a tantalum source and a phase forming accelerant into an alcohol solvent, stirring and mixing to obtain a tantalum solution; the surface of the base body is coated with a resin solution and a tantalum solution, heating curing, carbonization and cooling are carried out, a composite coating containing glassy carbon and tantalum carbide is obtained, and the composite coating is of a single-layer structure or a double-layer structure; the single-layer structure is a composite single-layer coating containing glassy carbon and tantalum carbide; the double-layer structure is a double-layer coating structure comprising a glassy carbon layer and a glassy carbon and tantalum carbide composite layer from bottom to top from one side of the surface of the base body. The density of the composite coating prepared by the method can be effectively improved, so that the corrosion resistance of the composite coating in a plasma environment is improved.

The present invention provides a rubber composition for grips that yields crosslinked rubber with a high static friction coefficient. [Solution] The rubber composition for grips contains a base rubber, hard porous carbon particles, and a vulcanizing agent, wherein at least a portion of the hard porous carbon particles is composed of glassy carbon, and the content of the hard porous carbon particles is 1.5% to 8.5% by mass of 100% by mass of the rubber composition.

The present disclosure relates to a physical vapor transport (PVT) growth chamber comprising: a source of silicon carbide for the sublimation of vapor species derived therefrom, including silicon vapor; a silicon carbide seed crystal; a membrane having a D50 pore size in a range of 10 µm to 200 µm disposed between the source of silicon carbide and the silicon carbide seed crystal, such that the sublimation vapor species migrate through the membrane towards the silicon carbide seed crystal, a crucible for housing the source of silicon carbide, the silicon carbide seed crystal; and the membrane, said crucible comprising an inner surface layer in communication with silicon vapor. The membrane or the inner surface layer of the crucible comprises a composite composed of two or more regions; a first region comprising a carbonaceous material, excluding glassy carbon, composed of an average crystallite size of no more than 27 nm; and / or carbon black or activated carbon.

This invention discloses a method and apparatus for manufacturing glass carbon cylindrical tubes, relating to the field of glass carbon cylindrical tube manufacturing. The manufacturing method includes the following steps: injecting thermosetting resin liquid into a rotating cylinder and heating the rotating cylinder to obtain an initial gel-state cylindrical tube blank after the rotation heating is completed; placing the initial gel-state cylindrical tube blank fitted on a supporting mandrel in a low-temperature environment to obtain a final gel-state cylindrical tube blank; curing the final gel-state cylindrical tube blank fitted on the supporting mandrel to obtain a final cured cylindrical tube blank; and carbonizing the final cured cylindrical tube blank fitted on the supporting mandrel at high temperature to obtain a glass carbon cylindrical tube. This invention avoids internal porosity defects caused by limited venting paths in traditional mold forming, and utilizes gel shrinkage to achieve natural separation of the blank from the inner wall of the rotating cylinder, thereby eliminating tearing damage to the blank caused by forced demolding.

The present invention relates to a method for treating a substrate having a free surface of a semiconductor material, in particular a single-crystal semiconductor material, comprising a method for stabilizing said surface against the formation of terraces and / or beads, said method comprising the gas-phase formation, on said surface, of a layer of glassy carbon (30) at a temperature (T1) above 700°C, preferably above 800°C, and strictly below 1000°C, preferably below 950°C, and more preferably below 900°C, and a heat treatment of said substrate after stabilization of said surface, wherein the glassy carbon layer (30) limits the reorganization of the surface into a semiconductor material in the form of terraces, the deposition of the carbon layer (30) and the heat treatment being carried out in the same furnace. Figure for the abstract: Fig. 3

The invention discloses a preparation method of a ternary La-Sm-Fe rare earth iron alloy, which comprises the following steps: adding a La-Fe alloy into a tungsten crucible, and then putting the tungsten crucible into a high-purity graphite tank; the method comprises the following steps: drying anhydrous SmF3, LiF and Li2O, and filling a high-purity graphite tank with the dried anhydrous SmF3, LiF and Li2O; the preparation method comprises the following steps: heating and melting SmF3, LiF, Li2O and La-Fe alloy, then adding anhydrous SmOF into SmF3-LiF-Li2O mixed molten salt, stirring, and standing at a constant temperature; the La-Fe alloy in the tungsten crucible is connected to a copper cathode lead, and high-purity glassy carbon serving as an anode is connected to the SmF3-LiF-Li2O fused salt; electrolyzing under a pulse potential condition, and loading an anode into ultrasonic oscillation at a certain time interval; and a La-Sm-Fe alloy ingot obtained through electrolysis in the tungsten crucible is cooled to the normal temperature, alloy skin dross is removed, then vacuum sealing storage is conducted, and the purity of the obtained La-Sm-Fe alloy is not lower than 99.80%.

The invention belongs to the technical field of material preparation, and particularly relates to application of superstructure glassy carbon in bone repair promotion and a preparation method of a bone repair material. The invention firstly provides a bone repair material. The bone repair material is prepared from a glassy carbon material subjected to surface modification; the glassy carbon material has a stable structure in which stress in all directions is uniformly distributed; the superstructure glassy carbon takes a unit cell of a three-period minimum curved surface as a minimum repetitive unit; the glassy carbon material subjected to surface modification has a coral-like or coral-like morphology. The bone repair material disclosed by the invention can realize induction of accelerated repair and regeneration of bone tissues, and in addition, the bone repair material also has good mechanical properties.

This invention relates to a nitrogen-circulating furan resin glass carbon pyrolysis furnace apparatus. The apparatus includes a pyrolysis furnace body (5), a high-temperature fan (1), a silicon carbide rod heating device (3), an airflow distributor (4), an air duct (2), and a filter (6). An airflow distributor (4) is installed at both the front and rear ends of the pyrolysis furnace body (5). The rear end of the airflow distributor (4) at the rear end of the pyrolysis furnace body (5) is connected to the filter (6), and the rear end of the filter (6) is connected to the high-temperature fan (1). The rear end of the high-temperature fan (1) is connected to the silicon carbide rod heating device (3), and the rear end of the silicon carbide rod heating device (3) is connected to the airflow distributor (4) at the front end of the pyrolysis furnace body (5). This invention overcomes the shortcomings of the prior art and provides a glass carbon production apparatus with high glass carbon yield, energy saving, long service life, convenient operation and maintenance, and reduced equipment investment.

This application belongs to the field of semiconductor technology and discloses a composite coating for semiconductor devices and its preparation method. The preparation method includes the following steps: adding an organic resin and a carbon raiser to an alcohol solvent and mixing them evenly to obtain a resin solution; adding a tantalum source and a phase-forming promoter to the alcohol solvent and stirring to obtain a tantalum solution; coating the resin solution and tantalum solution onto a substrate surface, heating to cure, carbonizing, and cooling to obtain a composite coating containing glassy carbon and tantalum carbide. The composite coating is a single-layer structure or a double-layer structure. The single-layer structure is a composite single-layer coating containing glassy carbon and tantalum carbide; the double-layer structure consists of a glassy carbon layer and a glassy carbon and tantalum carbide composite layer from bottom to top on one side of the substrate surface. The composite coating obtained by the above method can effectively improve its density, thereby improving its corrosion resistance in a plasma environment.

The invention relates to the technical field of refractory materials, in particular to a refractory material with high thermal shock resistance and a preparation method thereof, which are used for solving the problem of poor thermal shock resistance of the existing refractory material. By adopting multi-stage grain composition, the stacking density is improved, the porosity is reduced, and the thermal shock resistance of the material is improved; the hexagonal boron nitride whiskers are added, so that the effects of crack deflection, crack bridging and the like are achieved, and the thermal shock resistance of the material is improved; a binder is added, Si is introduced to a phenolic resin molecular chain, the oxidation resistance and thermal stability of phenolic resin are improved, carbon black serves as a seed crystal and a fixed carbon skeleton and is interwoven with glassy carbon generated by resin pyrolysis, and the high-temperature strength, thermal conductivity and thermal shock resistance of the material are improved; the protective coating is prepared on the surface of the material by adopting a slurry brushing method in combination with gaseous siliconizing treatment, so that the compactness of the coating is improved, the bonding strength between the coating and a matrix is improved, and the coating has good high-temperature oxidation resistance and thermal shock resistance.

The invention provides a method for recovering lithium from LAS microcrystalline glass, which comprises the following steps: (1) mixing LAS microcrystalline glass, sodium carbonate and sodium sulfate to obtain a mixture; (2) roasting the mixture obtained in the step (1) to obtain a roasted material; and (3) grinding the roasted material obtained in the step (2), slurrying with water, and adding an acid solution for acid leaching to obtain a lithium extraction solution. By adopting the combination of sodium carbonate and sodium sulfate, the structure of the microcrystalline glass can be destroyed, the stable crystalline phase of lithium is mainly destroyed, and the leaching rate of lithium in the microcrystalline glass is improved.

The invention provides a glassy carbon mold, a recrystallized silicon carbide product and a preparation method, and belongs to the technical field of ceramic material preparation. The preparation method comprises the following steps: mixing microcrystalline cellulose with water, and molding the obtained mixed material to obtain a cellulose blank; in an oxygen-containing atmosphere, carrying out stabilizing treatment on the cellulose green body to obtain a stabilized green body; and carrying out carbonization treatment on the stabilized green body in a protective atmosphere to obtain the glassy carbon mold. When the glassy carbon mold is used for preparing a recrystallized silicon carbide product, a green body in a complex shape can be directly formed conveniently and can be sintered along with the product, the problem that the green body is prone to damage and deformation in the transferring process is solved, and environment friendliness is achieved.