442results about "Ultra-high pressure processes" patented technology

Luminescent diamond is made by subjecting a volume of diamond grains to high-pressure / high-temperature conditions with or without a catalyst to cause the grains to undergo plastic deformation to produce nitrogen vacancy defects in the diamond grains, increasing the luminescent activity / intensity of the resulting diamond material. The consolidated diamond material may be further treated to further increase luminescent activity / intensity, which treatment may comprise reducing the consolidated diamond material to diamond particles, heat treatment in vacuum, and air heat treatment, which reducing process further increases luminescent activity / intensity. The resulting luminescent diamond particles display a level of luminescence intensity greater than that of conventional luminescent nanodiamond, and may be functionalized for use in biological applications.

Luminescent diamond is made subjecting a volume of diamond grains and catalyst material to high-pressure / high-temperature (HPHT) conditions. A pressure apparatus and / or a pressure cell is specially configured to impose a differential or asymmetric pressure onto the diamond volume during the HPHT conditions. This subjects the diamond grains to differential strain that increases the degree of plastic deformation of the diamond grains to increase the formation of nitrogen vacancy centers. Diamond pellets formed by such process and subjected to differential pressure can have an aspect ratio, or an aspect ratio change, of greater than one. The temperature of the HPHT process is 1.800° C. or less to facilitate desired nitrogen migration to preferentially promote formation of NV centers over NVN and N3 centers in the diamond pellets to provide a degree of luminescence in a red wavelength spectrum greater than diamond pellets formed by some other HPHT processes.

The utility model relates to the technical field of artificial diamond superhard materials, and discloses a synthetic block device filled with high-density materials in multiple directions, which comprises two outer frames formed by pyrophyllite, a filling groove is arranged on the plane of each outer frame, a filling layer is filled in each filling groove, and the outer frames are filled with high-density materials. Wherein the filling layers in at least one group of symmetrical filling grooves are conductive; a dolomite lining is arranged in the outer frame; according to the utility model, under the precondition of meeting stable growth of crystals, the pressure can be reduced by 8-15 Mpa on the basis of the original pressure, the service life of the cubic press can be directly prolonged, the frequency of beam disassembly and maintenance is reduced, the cost of manpower and material resources is saved, and favorable conditions are provided for enterprises to realize cost reduction and efficiency improvement.

The invention relates to the technical field of superhard material synthesis equipment, and discloses a frame type cubic press which comprises a base, a fixed support is fixedly connected to the middle of the inner wall of the base, a hydraulic pump is fixedly connected to the top of the inner wall of the fixed support, and a supporting block is fixedly connected to the output end of the hydraulic pump; second adjusting rods are rotatably connected to the peripheries of the outer walls of the supporting blocks, a rotating shaft is fixedly connected to one end of the outer wall of each second adjusting rod, a first adjusting rod is rotatably connected to the middle of the inner wall of each rotating shaft, a folding ring is rotatably connected to the bottom of the outer wall of each first adjusting rod, and a movable column is fixedly connected to the adjacent sides of the outer walls of the multiple supporting blocks. And one end of the outer wall of the moving column is fixedly connected with a holding-up hammer. The cubic press is based on the base, the hydraulic pump ensures that the sample is uniformly pressed, the sliding connection of the frame ensures that the holding-up hammer is accurately guided, the hydraulic pump synchronously contracts the holding-up hammer, the pressure on the six surfaces of the sample is uniform, and the experiment accuracy is improved.

Luminescent diamond is made by subjecting a volume of diamond grains to high-pressure / high-temperature conditions with or without a catalyst or pressure transfer media to cause the grains to undergo plastic deformation to produce internal vacancy defects, increasing the luminescent activity / intensity of the resulting diamond material. The luminescent material is then subjected to further treatment to create quantum dots on the surface of the diamond particles. Quantum dot formation can include placing the diamond particles in liquid and subjecting the particles to laser pulses. The consolidated diamond material may be treated to further increase luminescent activity / intensity including reducing the consolidated diamond material to diamond particles, heat treatment in vacuum, and / or air heat treatment. The resulting luminescent diamond particles display a level of luminescence intensity greater than that of conventional luminescent nanodiamond, and may be functionalized for use in biological applications.

A directed energy firefighting device is disclosed to extinguish fires with light, comprising a structured light generator and a directed energy controller for detecting and extinguishing fires remotely and at the speed of light. The device employs structured directed light energy capable of inducing atmospheric avalanche breakdown, generating at least one of sound waves and shockwaves, and dynamically forming space-time acoustic arrays for precise fire suppression. The system may integrate one or more energy sources, including gyrotrons, traveling wave tubes, klystrons, free electron lasers, and others, to produce diffraction-resistant and dynamically structured beams that penetrate through the atmospheric and non-metalic solid physical obstructions. Key features also may include safety mechanisms and artificial intelligence for real-time optimization. Other applications include power beaming, environmental monitoring, medicine, disaster response, and orbital debris clearing are also discussed. A key feature is the ability for arbitrary manipulation of light over large areas.

The invention relates to the technical field of synthesis equipment of superhard materials, in particular to energy-saving type diamond production equipment and a production technology.The energy-saving type diamond production equipment comprises a machine body, a holding-up hammer, a transmission rod, a clamping piece and an adjusting assembly, the machine body is fixedly arranged, a cavity is formed in the machine body, pyrophyllite is located in the center of the cavity, and the holding-up hammer is arranged in the cavity; the holding-up hammers are arranged on the machine body, the extension lines of the transmission rods penetrate through the center and one vertex angle of the pyrophyllite, and the transmission rods slide and can intersect at the center position of the pyrophyllite; the clamping piece is arranged on the transmission rod and used for clamping the vertex angle, corresponding to the transmission rod, of the pyrophyllite. The adjusting assembly is used for guiding each holding-up hammer to slide towards the center position of the cavity. The pyrophyllite can be fixed at the central position in the cavity through the cooperative arrangement of the transmission rod and the clamping piece, so that the phenomenon of pyrophyllite position deviation caused by asynchronous contact between the six holding-up hammers and the pyrophyllite is improved, and the degree of uneven stress of a carbon source is relieved.

The invention relates to the technical field of superhard material machining, in particular to a cubic press and a cubic boron nitride cutter machining method thereof.The cubic press comprises a cubic press body, and a centering mechanism and a bottom cleaning mechanism are arranged at the hydraulic end of a lower pressing mechanism; a discharging mechanism is arranged on the upper surface of the fixed support located on the lower jacking mechanism and arranged on one side of the bottom cleaning mechanism. The method for machining the cubic boron nitride cutter comprises the following steps of raw material mixing, die filling, feeding, high-temperature and high-pressure sintering, discharging, material cutting, cutter welding and the like. A pyrophyllite mold can be located in the center of the hydraulic end through the centering mechanism, the qualified rate of products is increased, pyrophyllite chippings are prevented from adhering to the end face of the hydraulic end and the surface of an abutting sealing top plate through a bottom sweeping mechanism and sweeping brushes on the discharging mechanism, automatic discharging is adopted by the discharging mechanism, pedal installation and manual operation are not needed, and the production efficiency is improved. And the use safety of the cubic press is greatly improved.

The present invention relates to a process for preparing diamond particles, comprising subjecting a nanodiamond precursor material to a pressure of at least 8 GPa and a temperature of at least 900°C, wherein the diamond precursor material comprises a polycyclic aromatic compound which contains from 10 to 200 fused six-membered aromatic rings.

The application relates to the technical field of superhard materials, and discloses a non-magnetic polycrystalline diamond compact as well as a preparation method and application thereof. The non-magnetic polycrystalline diamond compact comprises a nickel-based hard alloy base and a polycrystalline diamond layer combined on the nickel-based hard alloy base; wherein the nickel-based hard alloy base comprises nickel and tungsten carbide, and the polycrystalline diamond layer comprises nickel and diamond micro powder. The non-magnetic polycrystalline diamond compact of the application uses a nickel-based hard alloy base, and the polycrystalline diamond layer uses nickel as a bonding phase, so that the magnetism of the polycrystalline diamond compact is effectively reduced, and the application requirement of a non-magnetic bearing material can be met.

The present disclosure discloses a high-temperature and high-pressure preparation method for hexagonal diamond, which belongs to the field of superhard material synthesis technology. The method comprises making high-purity graphite into a precursor, assembling the synthesis block, and then subjecting it to heating, pressurizing, temperature holding, and pressure holding processes to obtain hexagonal diamond. The preparation method for hexagonal diamond according to the present disclosure allows high-purity graphite to achieve higher pressure along the c-axis direction, further promoting the phase transition of graphite. In addition, the temperature field where the precursor is located has a certain temperature gradient, which facilitates the transformation of high-purity graphite into hexagonal diamond and achieves a better conversion rate of hexagonal diamond.

The invention provides a high-temperature and high-pressure sintering device for producing polycrystalline cubic boron nitride, relates to the field of cubic boron nitride production equipment, and aims to solve the problems that when a cubic press is used, the pressures of six hammers are inconsistent and the like. Comprising a cubic press main body, the cubic press main body comprises six groups of hinge beams which are distributed up, down, front, back, left and right, oil cylinder parts are coaxially fixed on the inner sides of the hinge beams, a nail hammer part is coaxially fixed on a piston rod of each oil cylinder part through a heat insulation seat, the oil cylinder parts are externally connected with a hydraulic unit, and the cubic press further comprises a compensation mechanism and a pressurization sealing mechanism; through the arrangement of a compensation plate, an annular compensation groove, an annular groove, an oil storage cylinder and the like, six compensation mechanisms which are communicated with one another are arranged in six oil cylinder pieces according to the communicating vessel principle, the cylinder body pressure of the six nail hammers is compensated in real time, the pressure consistency of the six nail hammers is achieved, and meanwhile accumulative errors can be avoided through the mode.

The invention discloses a holding-up hammer pressing and subpackaging device of diamond synthesis equipment, and relates to the technical field of diamond synthesis equipment, the holding-up hammer pressing and subpackaging device comprises a fixed seat, a pressing mechanism and a cleaning mechanism, the pressing mechanism is arranged on the fixed seat, and the cleaning mechanism is arranged on a connecting disc of the pressing mechanism. A piston cylinder of the pressing mechanism drives the holding-up hammer to move and touch the rack, the holding-up hammer is pressed into the protective sleeve, after pressing of the holding-up hammer is completed, impurities on the holding-up hammer and the protective sleeve are cleaned through a cleaning brush of the cleaning mechanism, it is avoided that normal work of the holding-up hammer and the protective sleeve is affected by the impurities, a rotating rod of the cleaning brush can freely move, and the cleaning effect is good. And the cleaning brush is pressed on the holding-up hammer and the protective sleeve under the action of the spring, the cleaning effect of the cleaning brush is improved, after the cleaning brush completes cleaning, the cleaning brush moves on the first arc-shaped rod to collide with the second arc-shaped rod under the action of the elastic force of the spring, impurities remaining on the cleaning brush can be shaken off, and therefore the next cleaning effect of the cleaning brush is improved.

The invention discloses catalyst powder capable of improving toughness of artificial diamond and a preparation method of the catalyst powder, and relates to the technical field of synthesis of artificial diamonds.The catalyst powder is composed of metal nickel, metal iron and nano-zinc oxide which is in an extending and protruding spherical shape in the microscopic state and forms powdery mixed metal powder, and the nano-zinc oxide is stacked in an inserted mode. The metal nickel and the metal iron are filled in an inserting and stacking gap; according to the catalyst powder, the quality of the diamond is improved in two different modes, the impact toughness and the heat impact toughness of the diamond are improved, the preparation method is simple in structure, no redundant component is added, doping of useless impurities is reduced, recycling is convenient, and the resource utilization rate is high.

The invention belongs to the technical field of substrate surface treatment, and particularly relates to a diamond substrate surface treatment device and method. The fixing frame is fixedly connected to the top of the workbench; the mounting seat is arranged below the fixing frame; a second motor is started, an output shaft of the second motor drives a rotating frame to rotate, the rotating frame drives a first grinding wheel and a second grinding wheel to rotate, and when the first grinding wheel rotates to the lowest position, rough grinding is conducted; when the second grinding wheel rotates to the bottommost part, fine grinding is carried out; the effect of converting rough grinding and fine grinding is achieved; when the drying box rotates to the bottommost part, the drying box is used for drying the polished diamond sheets; during grinding, a third motor needs to be started, a second gear is driven to rotate through an output shaft of the third motor, a first gear is driven to rotate through the second gear, a rotating rod is driven to rotate through the first gear, and a first grinding wheel and a second grinding wheel are driven to rotate through the rotating rod, so that the grinding effect is achieved.

The embodiment of the invention discloses a preparation method of a high-purity large-size hexagonal diamond, which comprises the following steps: S1, cutting along the c axis of highly oriented pyrolytic graphite to obtain cylindrical highly oriented pyrolytic graphite as a raw material precursor; s2, assembling the raw material precursor in a high-pressure heating synthesis assembly; s3, the high-pressure heating synthesis assembly is heated and pressurized to set pressure and set temperature, heat preservation is conducted for set time, and the high-purity hexagonal diamond is obtained; wherein the set temperature ranges from 1300 DEG C to 1900 DEG C, the set pressure ranges from 20 GPa to 25 GPa, and the set time ranges from 10 min to 20 min. According to the preparation method of the high-purity large-size hexagonal diamond disclosed by the embodiment of the invention, cylindrical high-orientation pyrolytic graphite cut along a c axis is used as a raw material precursor, the high-orientation pyrolytic graphite is completely converted into the high-purity large-size hexagonal diamond under set conditions, and the size is 1-2 mm; the method has important application prospects in the fields of superhard materials, semiconductor devices and the like.

The invention relates to the technical field of superhard materials, and discloses a non-magnetic polycrystalline diamond compact as well as a preparation method and application thereof. The non-magnetic polycrystalline diamond compact comprises a nickel-based hard alloy matrix and a polycrystalline diamond layer compounded on the nickel-based hard alloy matrix, wherein the nickel-based hard alloy matrix comprises nickel and tungsten carbide, and the polycrystalline diamond layer comprises nickel and diamond micro powder. According to the non-magnetic polycrystalline diamond compact, the nickel-based hard alloy matrix is used, and the polycrystalline diamond layer takes nickel as a binding phase, so that the magnetism of the polycrystalline diamond compact is effectively reduced, and the application requirement of a non-magnetic bearing material can be met.

The invention relates to a preparation method of Ti-plated polycrystalline diamond, which comprises the following steps: step 1, purifying the surface of diamond by using an acid solution, and then drying after treatment; 2, uniformly mixing the treated diamond with Ti powder, Cu powder and a catalyst in a container; step 3, loading the mixture into a sintering boat, and putting the sintering boat into a quartz tube; 4, heating the heat treatment furnace to a certain temperature, pushing the quartz tube into the furnace, and keeping the temperature; 5, cooling to 500 DEG C along with the furnace, pulling out the quartz tube, and air-cooling to room temperature; and 6, taking out the sintering boat from the quartz tube, and screening to obtain the titanium-plated diamond. 7, titanium-plated diamond micro-powder is adopted as a raw material, the purified titanium-plated diamond micro-powder and a sintering aid are packaged in a molybdenum sleeve to be sintered, and after the surface and the cross section of a sintered sample are purified, the sample is analyzed; the adhesive has the advantages that the adhesive strength is improved, high-temperature damage is reduced, the bending strength is good, and the service life is prolonged.

The invention relates to the technical field of artificial diamonds, in particular to an artificial diamond single crystal generation process which comprises the following specific steps: A, mixing and granulating graphite, mother powder and a metal catalyst, and then transferring into a pressing workshop to be pressed into a graphite column; b, pyrophyllite powder and boron nitride powder are mixed and then made into a cylindrical blank, and a cylindrical cavity is machined in the center of the pyrophyllite blank; c, assembling the graphite column, the pyrophyllite cylinder, the plug assembly, the heating assembly and the insulating assembly into a synthetic block; and D, a mechanical arm carries the clamping mechanism to position the synthetic block to the center of a cavity of the cubic press, the surface of the anvil in the equipment is blown and swept, dust particles are removed, then the clamping mechanism is taken back, and the cubic press is started for temperature rising and pressure rising. And more time and energy are consumed.

The present invention discloses a top hammer device for a six-sided top press and a method for processing diamonds with high thermal conductivity, and relates to the field of artificial diamond preparation equipment. The present invention includes multiple groups of hammer heads and hydraulic telescopic mechanisms. The hydraulic telescopic mechanisms are fixedly installed inside the six-sided top press. A hammer head is fixedly installed at the telescopic end of each hydraulic telescopic mechanism. The interior of the hydraulic telescopic mechanism is provided with an extension drive chamber that can drive the hydraulic telescopic mechanism to extend and a contraction drive chamber that drives the hydraulic telescopic mechanism to contract. Both the extension drive chamber and the contraction drive chamber are connected to a hydraulic pumping mechanism. A pressure detection mechanism that can detect the surface pressure of the hammer head is installed on the hammer head. The present invention can directly and accurately detect the surface pressure of the hammer head when the top hammer device is working, thereby improving the accuracy of the hammer head pressure detection. When the hammer head pressure overload is detected, the control system drives the hydraulic pumping mechanism to suck and release the pressure in the extension drive chamber to prevent the hammer head from breaking and being damaged due to pressure overload.

The present invention relates to diamond abrasive grains and a manufacturing method thereof, and provides tetradecahedral diamond abrasive grains with uniform size and shape. The manufacturing method of diamond abrasive grains according to the present invention allows for shape control and minimizes impurities and crystal defects, thereby manufacturing diamond abrasive grains for ultra-precision grinding in chemical mechanical planarization (CMP) processes.

The invention belongs to the technical field of diamond cultivation. The method particularly comprises the following steps: step 1, extracting biological carbon powder from a carbon-containing biological sample; 2, preparing the biological carbon powder into a biological carbon source; 3, pressurizing and heating the biological carbon source by using a cubic press, putting the biological carbon source into a diamond culture bin of the cubic press, forming an artificial high-temperature and high-pressure environment through a synthesis device, and performing phase transformation on graphite to generate diamonds; the carbon-containing biological sample can be fingernails, hair or teeth, a favorable environment can be provided for cultivation and growth of the biological diamonds, the success rate of synthesis of the biological diamonds is greatly increased, and the problems of supply of a biological carbon source and too high purchase cost are solved; and the biological diamond can be grown at a high success rate in the synthesis process of the biological carbon source.

Luminescent diamond is made by creating vacancies in diamond grains and heat treating the diamond grains by controlling a thickness of the diamond grains on a substrate. The heat treatment may occur in a temperature range that does not burn the diamond grains, and the controlled thickness produces an even color change and / or promotes oxygen terminations on the diamond particle surfaces.

Provided is a single-crystal diamond wherein: the half width of an X-ray diffraction rocking curve is 20 seconds or less, the half width of the X-ray diffraction rocking curve being measured using CuKα rays in X-ray diffraction by means of a double-crystal method in which a diamond crystal is used as a first crystal, with a (0004) plane parallel arrangement; the half width of a peak at the Raman shift of 1332 cm-1 to 1333 cm-1 in the Raman spectrum is 2.0 cm-1 or less; the etch pit density is 10000 / cm2 or less, the etch pit density being measured by means of an etching test; and the nitrogen content in terms of the number of atoms is more than 0.1 ppm and at most 50 ppm.

The invention relates to the technical field of diamond preparation, in particular to a quantum diamond with an ultrahigh-density NV-color center and a preparation method and application of the quantum diamond. At present, the preparation of the quantum diamond generally adopts an electron irradiation and vacuum annealing method, and the quantum diamond prepared by the method is difficult to obtain the ultra-high density characteristic; therefore, the ultra-high-density quantum diamond is difficult to prepare at present. The quantum diamond with the NV-color center density larger than or equal to 15 ppm is prepared by greatly improving the irradiation dose, adjusting the annealing pressure and other technological conditions. The problem that ultra-high-density quantum diamond cannot be prepared in a common method is solved; and a favorable condition is provided for wide application.

The present invention discloses a synthetic device for synthetic diamonds from life, which includes: a growth chamber, in which a plurality of mutually isolated growth chambers are provided, and a synthetic cavity assembly is provided in each growth chamber; wherein, the synthetic cavity assembly includes a heating assembly and a synthetic assembly, the heating assembly is arranged at the upper and lower ends of the synthetic assembly, the heating assembly includes a heating sheet and a heating electrode, the heating sheet is arranged close to the synthetic assembly, and the heating electrode is arranged on the heating sheet. The present application achieves the purpose of being able to place one seed crystal in each of the multiple growth chambers in a growth chamber, so that multiple seed crystals can be cultivated simultaneously in one growth chamber, thereby realizing the technical effect of improving the cultivation efficiency of synthetic diamonds from life and reducing the cultivation cost, and then solving the problem that in the synthesis process of synthetic diamonds from life in the related art, only one seed crystal can be placed in each diamond growth chamber, so the production efficiency is much lower than that of ordinary cultivated diamonds, resulting in the high manufacturing cost of synthetic diamonds from life.

The invention provides a catalyst for synthesizing flaky CBN, flaky CBN and a preparation method and application of the flaky CBN. According to the sheet-shaped CBN synthesis catalyst, magnesium nitride and lithium hydride are taken as main components of the catalyst, calcium boride and titanium nitride are taken as catalyst additives, and the CBN synthesis catalyst with relatively small catalyst viscosity is designed. Hexagonal boron nitride is used as an initial raw material, under the action of the catalyst, irregular flaky orange CBN is synthesized at high temperature and high pressure, and the CBN has the characteristics of low strength, high sharpness and the like, and has the characteristic of high self-sharpening when being used as an abrasive material. The invention further provides application of the flaky CBN serving as a grinding material in grinding high-speed steel, surface hardening steel, hard alloy, alloy steel, nickel-based high-temperature alloy or cobalt-based high-temperature alloy, and therefore the grinding efficiency can be effectively improved.

The invention relates to the technical field of quantum diamond preparation, in particular to a 1t; 111gt, 111gt; the invention discloses a preparation method of quantum diamond with controllable crystal orientation preferential degree and the prepared quantum diamond. In an irradiation process, irradiation electron beams and diamond tilt are adjusted; 111gt, 111gt; due to the included angle of the crystal orientation, the 1t of the prepared quantum diamond is realized; 111gt, 111gt; and the crystal orientation preferential degree is controllable and adjustable. According to the preparation method disclosed by the invention, the lt can be prepared according to different requirements; 111gt, 111gt; the quantum diamond with different crystal orientation preferential degrees solves the problem that an existing preparation method cannot be used for preparing the quantum diamond with the specific lt; 111gt, 111gt; and the technical problem of the quantum diamond with the crystal orientation preferential degree is solved. The preparation method provided by the invention can be used for preparing lt; 111gt, 111gt; the quantum diamond with high crystal orientation preferential degree provides a premise for application of the quantum diamond in the field of quantum sensors.

In order to overcome the problems of high recovery price, high energy consumption and low utilization rate of the existing kettle residue for the production of ethylene glycol by ethylene carbonate alcoholysis method, the application provides a kettle residue recovery method and device for the production of ethylene glycol by ethylene carbonate alcoholysis method, and the application provides a kettle residue recovery method for the production of ethylene glycol by ethylene carbonate, which comprises the following steps: under the conditions of temperature 150-250 DEG C and pressure 0.6-2 MPa, the ethylene glycol in the kettle residue produced by the preparation of ethylene glycol by ethylene carbonate alcoholysis method is converted into diethylene glycol under the catalysis of alkali metal salt catalyst, and after the reaction is completed, the kettle residue is a mixture of ethylene glycol, diethylene glycol, triethylene glycol and salt, the mixture is purified, and ethylene glycol and diethylene glycol are recovered; the economic benefit is improved, the rectification separation operation is simplified, the equipment investment and the overall energy consumption are reduced, and the utilization rate of ethylene glycol kettle residue is improved.

The invention belongs to the technical field of artificial diamond processing, and relates to a raw material pretreatment device and method applied to an artificial diamond synthesis process, and the method comprises the following steps: selecting graphite powder with the purity not lower than 99.9% as a carbon source main material, screening through a 100-mesh standard sieve, removing coarse particles with the particle size larger than 150 microns and impurities, and collecting screen underflow for later use; meanwhile, metal catalyst powder with the particle size of 5-10 microns is selected, the screened graphite powder is placed in plasma treatment equipment, inert gas is input to drive the graphite boat body to rotate in the furnace, it is ensured that all the surfaces of the biscuit can make continuous and uniform contact with the high-temperature inert gas, and therefore the sintering temperature of the biscuit is increased; the problem of uneven heating caused by the near-heat and far-cold effect in the static oven is fundamentally solved; and the biscuit is uniformly dehydrated and purified in all-dimensional hot air flow, so that insufficient pretreatment caused by local overheating or insufficient temperature is effectively avoided, and the quality stability of a final artificial diamond product is greatly improved.