325results about "Ultra-high pressure processes" patented technology

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.

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 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 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 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.

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 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.

The invention relates to the technical field of diamond preparation, in particular to quantum diamond with long drying time and a preparation method and application thereof. As the NV-color center density is increased, the distance between the NV-color centers is reduced, and the interaction is enhanced, so that the de-coherence process is accelerated, and the coherence time is shortened. Therefore, the characteristic of long drying time only exists in the quantum diamond with the low-density NV-color center at present; quantum diamonds with high NV-color center density and long drying time superposition characteristics do not appear in the field. The quantum diamond with high NV-color center density and long drying time superposition characteristics is successfully prepared by adopting electron irradiation and high-temperature annealing modes.

This invention belongs to the field of superhard material synthesis technology, specifically disclosing a high-temperature, high-pressure preparation method for nano-polycrystalline diamond with synergistic mechanical and thermal properties. The method includes the following steps: precursor preparation: pre-pressing the precursor in a cemented carbide mold; octahedral assembly; wrapping the pre-pressed sample with platinum foil and placing it at the center of the octahedron; high-temperature, high-pressure sintering; stopping heating after heat preservation, allowing it to cool naturally to 23-25°C, then depressurizing, removing the octahedral assembly and the platinum foil wrapping, thus obtaining the synergistically enhanced nano-polycrystalline diamond. This invention employs the above-mentioned high-temperature, high-pressure preparation method for nano-polycrystalline diamond with synergistic mechanical and thermal properties. By combining nanodiamond powder with graphene, the sample assembly is optimized, and nano-polycrystalline diamond samples with excellent mechanical properties and significantly improved thermal conductivity are synthesized under relatively mild temperature and pressure conditions.

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.

The artificial diamond synthesis system comprises a workbench, a cubic press is fixedly mounted at the top of the workbench, a cooling box is fixedly connected to one side of the workbench, and a discharging bearing plate is fixedly connected to one end of the cooling box; a clamping device for automatically feeding the synthetic diamond blocks is arranged on one side of the cubic press; a lifting device facilitating better feeding of the clamping device is arranged on the side, corresponding to the feeding port, of the top of the cooling box. And a translation device for pushing the synthetic diamond block to move is arranged in the cooling box, and a cooling device for reducing the temperature of the synthetic diamond block is arranged at the bottom of the cooling box. The problems that the diamond synthesis block is not easy to place and the temperature is high after synthesis are solved, and the synthesis automation of the artificial diamond is improved.

The utility model relates to the technical field of diamond processing, in particular to a heating holding-up hammer structure of a diamond press, which comprises a holding-up hammer body, an insertion rod, a side block and a mounting component, the insertion rod is fixedly connected with the holding-up hammer body, and the side block is fixedly connected with the insertion rod. The mounting assembly comprises a mounting block, a lower pressing plate, two telescopic rods, two telescopic springs, a heating piece and a locking piece, the mounting block is detachably connected with the side block, the lower pressing plate is slidably connected with the mounting block, the two telescopic rods are fixedly connected with the mounting block, the telescopic springs are arranged on the outer sides of the telescopic rods, the heating piece is fixedly connected with the mounting block, and the locking piece is in threaded connection with the side block. In this way, the holding-up hammer can be stably and rapidly installed, loosening of the holding-up hammer in the using process is effectively avoided, and the using stability and firmness of equipment are improved.

The invention provides diamond particle manufacturing equipment and a control method thereof. The equipment is characterized in that an explosion tank is used for containing carbon source slurry; the straightening device straightens the metal wire to be straightened to obtain a straightened metal wire; the electrode clamping device is connected with the power supply mechanism, and clamps and straightens the metal wire at a first position and a second position respectively; moving the target metal wire section into the carbon source slurry; the cut-off device cuts off the straightened metal wire at a third position after the electrode clamping device clamps the straightened metal wire, and a target metal wire section is obtained; and after the target metal wire section moves into the carbon source slurry, the power supply mechanism outputs direct-current electric energy to the target metal wire section through the electrode clamping device, so that the target metal wire section explodes, and the carbon source generates diamond particles under the high-temperature and high-pressure conditions. The effects of stably and continuously generating effective explosion and reducing the waste rate can be achieved, the safety of electric explosion can be improved, and the convenience of equipment operation and maintenance can be improved.

The utility model belongs to the technical field of cubic presses, and particularly relates to a cubic press holding-up hammer correcting block which comprises a correcting block body, a connecting block is installed on the outer wall of the correcting block body, an adjusting rod is connected to the connecting block in a threaded mode, a center plate is fixedly connected to one end of the adjusting rod, a rotating ring is fixedly connected to the outer wall of the center plate, and the rotating ring is fixedly connected to the outer wall of the center plate. A supporting plate is rotationally connected to the outer wall of the rotating ring, a connecting groove matched with the rotating ring is formed in the supporting plate, a receding groove is formed in the supporting plate, and a supporting frame is connected to the inner wall of the receding groove in a clamped mode; the position of the supporting plate can be adjusted through an adjusting rod, a connecting groove and a rotating ring, so that the device is adjusted according to the position of the jacking machine after jacking, the jacking machine is corrected, and an assembly capable of correcting the position of the jacking end after contraction is formed in cooperation with a receding groove, a threaded rod and a supporting frame; and the device can be used for conveniently correcting the jacking and retracting positions of the jacking end of the cubic press.

The present application relates to the technical field of diamond anvil cell pressurization, and particularly discloses a visible and controllable pressurization system based on a diamond anvil cell and a use method thereof, which solves the problem that the pressurization process of the diamond anvil cell cannot be observed and controlled accurately in the prior art. The system comprises a diamond anvil cell, the diamond anvil cell is installed on a fixing device, and a pressure detection assembly for obtaining the pressure in a sample cavity of the diamond anvil cell and a pressurization detection assembly for obtaining the pressurization state of the diamond anvil cell are arranged above the diamond anvil cell. The present application has the advantages that the pressurization process is visualized and controllable, the phenomena such as sample cavity deviation, deformation and liquid leakage of the diamond anvil cell are avoided, the uncontrollable problem of target pressure and pressurization step length is solved, and the experimental precision and success rate are improved.

The invention provides a blank molding assembly block of diamond large single crystals and a plastic growth method, and belongs to the technical field of superhard material synthesis. The blank molding assembly block comprises a mutually-embedded metal catalyst layer formed by mutually embedding a plurality of prismatic table metal catalyst structures, the whole mutually-embedded metal catalyst layer is in a prismatic table shape, one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the high-purity graphite carbon source layer, and the other one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the seed crystal; the adjacent prismatic table metal catalyst structures are separated by an insulating layer, and the insulating layer is a Ca coating or a BN coating. A mutually-embedded prismatic-table-shaped metal catalyst structure with an axial temperature gradient and a carbon diffusion channel is constructed in a blank assembly block, diamond is induced to grow in a preset direction in an HPHT environment, directional shaping growth of the diamond is achieved under the condition that the process complexity is not improved, and the quality of the diamond is improved. The crystal morphology controllability, the catalytic agent utilization efficiency and the final drilling rate are remarkably improved, and the single-cavity yield is increased.

The invention relates to the technical field of hard alloy for synthesis of superhard materials, and particularly discloses a hard alloy holding-up hammer for synthesis of high-purity large single crystal diamond and a preparation method of the hard alloy holding-up hammer. The holding-up hammer material is composed of the following components in percentage by weight: 80%-88% of WC, 4%-8% of Co, 2%-5% of TaC, 3%-7% of TiC and 0.5%-2% of Cr3C. Wherein WC serves as a hard phase, Co serves as a binding phase, TaC inhibits grain growth, TiC nanoparticles are dispersed and distributed to form a pinning effect, and Cr3C2 improves the wettability of the binding phase and improves the oxidation resistance. The preparation method comprises the steps of raw material selection and ball-milling mixing, vacuum drying and sieving, cold pressing and cold isostatic pressing forming, gradient sintering and grinding and subzero treatment.

The present invention relates to an assembly used for synthesizing a composite sheet with a cylindrical protrusion at the tail and a synthesis method thereof; the assembly comprises a metal cup A, a metal cup B and an auxiliary ring; diamond micropowder is mixed with a binder and is arranged at the bottom of the metal cup A; a cemented carbide substrate is pressed on top of the diamond micropowder, the bottom is a large cylinder, and the top is a small cylinder coaxially connected to the large cylinder; the auxiliary ring is in the shape of a gasket corresponding to the small cylinder and is sleeved outside the small cylinder; the metal cup B is buckled and mounted on the top of the small cylinder; the auxiliary ring is made of a high-temperature and high-pressure resistant material. The steps of the synthesis method are: 1. preparing raw materials, 2. high-temperature and high-pressure synthesis, and 3. mechanical processing; the present invention uses the auxiliary ring to support the metal cup A during high-temperature and high-pressure synthesis to ensure the formation of the composite sheet; the metal cup A ensures that the diamond powder is formed and connected to the cemented carbide bottom; during mechanical processing, the auxiliary ring can reduce the cutting difficulty of the cylindrical protrusion, reduce the cutting processing cost of the cylindrical protrusion, and improve processing efficiency.

The invention belongs to the technical field of diamond manufacturing, and discloses a gemstone-grade diamond manufacturing device and method.The manufacturing device comprises a diamond synthesis cavity, a first driving device, a second driving device, a third driving device, a fourth driving device and a fourth driving device, the diamond synthesis cavity is provided with a through hole, and the axis of the through hole is arranged in the first direction; the at least two groups of growth units are arranged in the through hole, at least one group of growth units is positively arranged from one end of the diamond synthesis cavity to the axial center position of the diamond synthesis cavity, and the other group of growth units is reversely arranged from the other end of the diamond synthesis cavity to the axial center position of the diamond synthesis cavity; the diamond synthesis cavity is arranged in the pyrophyllite combination block; the cubic press is connected with the pyrophyllite combined block; the controller is electrically connected with the cubic press; therefore, the multiple groups of growth units in the diamond synthesis cavity are symmetrically arranged, so that the production efficiency of the gem-grade diamond manufacturing device and the manufacturing method provided by the invention is higher.

The utility model discloses an assembly structure for synthesizing diamonds by a high-temperature and high-pressure method, which relates to the technical field of diamond synthesis and comprises an outer layer structure, a middle layer heating and insulating system, a core reaction layer and a top covering layer which are sequentially arranged from outside to inside, the outer-layer structure comprises a pyrophyllite composite block, a pyrophyllite ring surrounding the outer side of the pyrophyllite composite block and a conductive steel cap fixed to the top, the middle-layer heating and insulating system comprises a heating sleeve embedded into the pyrophyllite composite block, a heating piece is arranged in the heating sleeve, a magnesium oxide insulating sleeve is wrapped in the heating piece, and the outer-layer structure and the middle-layer heating and insulating system are arranged in the heating sleeve. A vertically supported thick zirconium oxide column is arranged below the heating sleeve, the core reaction layer comprises a magnesium oxide crystal bed, a carbon source is placed on the magnesium oxide crystal bed, alloy is distributed around the carbon source, and the top covering layer comprises a thin zirconium oxide column covering the core reaction layer. The problems that in the prior art, obtained seeds with high carbon content grow fast, but the impurity removal capacity is weak, and the quality is poor are solved; the seeds with low carbon content are good in quality but small in size, and the economic benefit is low.

This invention relates to the field of high-performance ceramic material preparation technology, specifically an ultra-high pressure discharge plasma sintering system, comprising a six-sided press body, a high-power DC pulse power supply, and a high-pressure synthesis assembly block. The six-sided press body has a frame providing ultra-high pressure and a hydraulic drive system. Its six carbide hammers together form a cubic space for placing the high-pressure synthesis assembly block containing the sample. The two poles of the high-power DC pulse power supply are respectively connected to two upper and lower large pads through two conductive copper strips. The ends of the two large pads are fitted with steel rings, and the ends of the steel rings are embedded with carbide hammers. This ultra-high pressure discharge plasma sintering system achieves rapid and uniform bulk heating of the sample. The synergistic effect of the two systems enables the densification sintering preparation of ultra-hard ceramics at temperatures far lower than those of traditional high-temperature and high-pressure methods in a short time.

The invention relates to the technical field of superhard material processing, in particular to a superhard material green synthesis process and an energy-saving high-pressure device, the superhard material green synthesis process comprises six groups of hinge beams distributed up, down, left, right, front and back, the outer side of each group of hinge beams is fixedly connected with four groups of hinge lugs in a circumferential array, two adjacent groups of hinge lugs are in butt joint, and the hinge lugs are in butt joint with the hinge beams. A hinge pin is inserted into the two sets of hinged lugs which are in butt joint, a hydraulic cylinder is installed in each set of hinged beams, holding-up hammers are installed at the close ends of each set of hydraulic cylinders, the first metal rods are fixedly connected to the outer sides of the multiple sets of holding-up hammers, and the ends, away from the holding-up hammers, of the first metal rods are fixedly connected with first traction ropes. Through the structural design of the centrifugal clamping mechanism, instantaneous clamping of the centrifugal clamping mechanism and the clamping teeth is achieved, the holding-up hammer moving inertially is rapidly locked when sealing media such as pyrophyllite are broken, impact damage caused by out-of-control displacement of the holding-up hammer is effectively blocked, equipment blasting accidents are prevented from the source, and the service life of the holding-up hammer is prolonged. And the equipment operation safety and the part service life are obviously improved.