24 results about "Diamond anvil cell" patented technology

The invention provides a high-sensitivity superconducting magnetic detection device and method based on an NV color center under high pressure and low temperature. The high-sensitivity superconducting magnetic detection device comprises a microwave emission module, an optical excitation module, an imaging module, a fluorescence collection module, a data collection and control module, a diamond anvil cell, a low-temperature test module and a magnet module. The method has the beneficial effects that the diamond injected with the NV color center serves as the anvil cell of the diamond anvil cell, and high-pressure and low-temperature conditions are synchronously obtained in liquid helium and liquid nitrogen temperature zones; according to the invention, in-situ pressure measurement can be realized under high pressure, and ruby or Raman standard pressure is not needed; a sample is placed in the diamond anvil cell, the diamond anvil cell is placed in the low-temperature cavity, the lowest temperature of 4K and in-situ pressurization can be realized by using the low-temperature test module, and the quality of a microwave signal transmitted by the low-temperature semi-steel cable is higher and the loss is smaller by using the low-temperature semi-steel cable. And the superconducting property of the material at low temperature and high pressure is quantitatively tested under the condition of high integration.

The invention relates to the field of high-pressure pressure distribution calibration and imaging, in particular to a high-pressure diamond anvil cell internal pressure calibration / imaging system and method based on wide-field optical detection magnetic resonance. The invention discloses a high-pressure diamond anvil cell internal pressure calibration / imaging system based on wide-field optical detection magnetic resonance. The system comprises a fluorescence excitation and collection unit which comprises a wide-field optical detection magnetic resonance pressure distribution imaging light path based on nano-diamond NV color center fluorescence and a pressure calibration light path based on a ruby microsphere fluorescence spectrum. Compared with the prior art, the technical effects of the invention are that a traditional single-point detection mode is broken through through a wide-field microscopic imaging method, submicron spatial resolution and 0.0045 GPa / Hz1 / 2 noise measurement sensitivity are realized, and a brand new stress field characterization means is provided for a high-pressure experiment.

The application provides an exoskeleton steel wire pressurizing type diamond anvil cell device, and belongs to the field of high-pressure scientific research. The upper diamond press anvil of an upper diamond mounting table is oppositely arranged with the lower diamond press anvil of a lower diamond mounting table. One end of a pressurizing steel wire is fixed to the lower part of a moving sleeve in an upper pressurizing table and is fixed through a steel wire locking screw on the side of the moving sleeve. The other end of the pressurizing steel wire is fixed in a fixed hole of a lower pressurizing table and is fixed through a pressurizing steel wire locking screw on the side of the lower pressurizing table. The pressurizing mode of the press is changed to fine steel wire tensioning pressurizing, and the support column structure is cancelled. The diameter of the steel wire is in the millimeter level, and the imaging angle range of the press is maximally improved. The current scheme all adopts the support column structure, and the maximum imaging angle is 152°. The steel wire tensioning pressurizing mode is adopted in the application, the imaging angle exceeds 170°, and no other alternative scheme can complete the purpose of the application.

The utility model discloses an in-situ heating device for a diamond anvil cell press. The in-situ heating device comprises a pair of diamond anvil cell press (DAC) upper and lower cushion blocks, a pair of diamond anvil cells, a sample to be heated and an in-situ heating gasket, the in-situ heating gasket is of a double-layer heating structure and comprises a metal gasket base layer located in the middle, and an insulating layer and a heating wire layer are arranged on the upper side and the lower side of the metal gasket base layer respectively, so that the double-layer heating structure is formed. According to the utility model, a convenient heating function can be provided for the diamond anvil cell pressing machine, the heating power is concentrated, and the situation that a traditional resistance wire heating ring is additionally arranged and occupies a large size is avoided; the device can be suitable for the conditions that the requirement for specific temperature rise uniformity is high or a specific experiment needs to be continuously carried out on a pressurized sample after heating and the like, redundant operation procedures are reduced, and the high-temperature and high-pressure experiment is simpler.

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 utility model discloses a heating device capable of gathering heat and a high-temperature and high-pressure diamond anvil cell system, which comprise a heating device body, the top of the heating device body is subjected to lower pressure, the bottom of the heating device body is subjected to upper pressure, and the action lines of the lower pressure and the upper pressure coincide. An upper anvil head and a lower anvil head arranged on the diamond anvil assembly can be close to each other under the action of lower pressure and upper pressure; the heating assembly is provided with a ceramic ring, the upper anvil head and the lower anvil head which are close to each other intersect in the central area of the ceramic ring, and the central area can form a high-temperature area. The resistance wire is wound on the ceramic ring to generate heat which is conducted to the central area to form the high-temperature area, so that the experimental environment of the central area can reach a high-temperature and high-pressure environment required by a test sample under the high pressure of the upper anvil head and the lower anvil head and the high temperature of the high-temperature area, and the temperature change rate of the ceramic ring is improved; the physical property of the sample can be conveniently researched.

The application relates to a high-precision diamond anvil cell pressure dynamic regulation device, and relates to a diamond anvil cell pressure regulation device.The application aims to solve the technical problem that the current diamond anvil cell is unevenly loaded when being pressurized, leading to asymmetric stress distribution on the upper and lower diamond anvil surfaces.The high-precision diamond anvil cell pressure dynamic regulation device is an axisymmetric structure, and specifically comprises an inner hexagonal wrench, a sleeve box, a first gear, an inner hexagonal sleeve and a gear.The application applies forces in opposite directions to the two inner hexagonal wrenches, and through the meshing of the four gears in the middle, the two inner hexagonal wrenches are simultaneously and oppositely rotated by different angles, so that the same pressure is applied to the diamond anvil cell, the screws are accurately controlled to rotate into the same distance, uniform force is applied to the diamond anvil cell, and the pressure size and distribution uniformity of the diamond anvil cell are accurately controlled.

The invention discloses a diamond anvil cell microlithography and material transfer system. The system comprises a bottom plate; the supporting piece is arranged on the bottom plate; the main light box is mounted on the supporting piece and is used for realizing microscopic imaging and micro-nano photoetching exposure; the focusing mechanism is connected with the main light box and used for driving the main light box to move in the vertical direction so as to adjust the focal length; the objective lens turntable is connected with the main light box and is provided with a microscopic imaging objective lens and a photoetching exposure objective lens; and the multi-axis alignment device is positioned below the main light box and comprises a sample table with heating and vacuum adsorption functions. The system integrates the functions of microscopic imaging, photoetching exposure and material transfer, and is suitable for high-precision micro-nano machining operation in a diamond anvil cell micro area. Through the double-channel optical path design and the multi-axis thermal adsorption alignment device, the machining precision and the experiment efficiency are effectively improved, and the technical threshold and the operation difficulty of high-pressure physical property research are remarkably reduced.

The present application belongs to the technical field of material thermoelectric effect measurement, and particularly relates to a diamond anvil cell high-pressure thermoelectric effect measurement device and a measurement method. The measurement device comprises a diamond anvil cell and a multifunctional bottom electrode arranged on the lower anvil surface of the diamond anvil cell. The bottom electrode comprises a heating wire, a thermoelectric voltage measurement electrode, and first and second temperature measurement electrodes which are independently arranged and constitute a sample measurement area. During measurement, the sample to be measured is placed in the measurement area, a platinum strip is connected to the electrode and a measuring instrument to form a measurement system, after pressure calibration and temperature calibration, the heating wire is powered to establish a stable temperature difference and apply a vertical magnetic field, the temperature difference and voltage value are obtained through the electrodes and the measuring instrument, and then the Seebeck coefficient and the Nernst coefficient are calculated. The method can realize in-situ high-precision measurement of thermoelectric parameters of two-dimensional materials under high pressure, extremely low temperature and strong magnetic field environment, and provides key technical support for the research of thermoelectric materials in extreme environment and the development of devices.

This application provides a testing device, assembly method, and electrical performance testing method for two-dimensional devices based on a diamond anvil cell, belonging to the field of high-voltage electrical transport measurement technology for two-dimensional materials. The two-dimensional device testing device includes a diamond anvil cell, a metal pad, an insulating part, and a two-dimensional device. The insulating part includes a first insulating part and a second insulating part. Second through holes are formed in the areas corresponding to the first through hole in both the first and second insulating parts. The inner walls of the two second through holes, the upper surface of the lower diamond anvil cell, and the lower surface of the upper diamond anvil cell together form a sample cavity. The two-dimensional device is housed within the sample cavity. The two-dimensional device includes a bottom grid, a first dielectric layer, an in-plane Hall electrode, a two-dimensional material, a second dielectric layer, and a top grid, stacked sequentially. This testing device can simultaneously control the grid voltage and pressure, thereby achieving the measurement of the electromagnetic transport characteristics of the two-dimensional material under the synergistic effect of the grid voltage and pressure.

The application relates to a method for preparing a high-brightness mixed fluorescent and phosphorescent white light-emitting IPA material, and belongs to the technical field of white light-emitting organic material preparation. The method comprises the following steps: taking a blue fluorescent emission dominated IPA as an initial material; pressurizing the initial sample to 16.0-23 GPa through a diamond anvil cell; and then discharging the diamond anvil cell to normal pressure to obtain a bright mixed fluorescent and phosphorescent white light-emitting IPA material. The IPA sample prepared through pressure engineering has high-brightness white light emission based on fluorescent and phosphorescent mixing, and the initial fluorescent and phosphorescent components of the IPA material are uneven. The preparation process is simple, the synthesis is at room temperature, the method is green and environment-friendly, and the method has high repeatability. The method greatly expands the selection range of the design of high-brightness white light-emitting materials.

The application relates to a device for electrode mask of nanometer thin film material in a diamond anvil cell and a use method thereof, and relates to the fields of mask plates and diamond anvil cell equipment, in particular to a device for electrode mask of nanometer thin film material in a diamond anvil cell and a use method thereof. The application aims to solve the technical problem that the preparation of nanometer thin film material electrodes in the existing diamond anvil cell is difficult. The device for electrode mask of nanometer thin film material in a diamond anvil cell is composed of a connecting plate, a diamond anvil cell, a metal frame, a positioning bolt, a vertical direction displacement table and a fixing bolt; the displacement of the diamond anvil cell in a horizontal plane and the up-down movement of the mask plate in the vertical direction are controlled, so that the mask plate and the thin-layer two-dimensional material can be precisely aligned in a three-dimensional space; in combination with the existing electron beam evaporation or thermal evaporation equipment, the nanometer thin film material can be conveniently electrode designed and prepared on the anvil surface of the diamond anvil cell.

The invention discloses an integrated NV color center quantum sensor for in-situ pressure and a magnetic field in a diamond anvil cell. Comprising an anvil cell module for accommodating a to-be-tested sample, a diamond NV color center and chromium-doped ruby micron particles, and transversely pulling a microwave antenna; the integrated light path module is used for enabling laser or white light to excite the micron particles through an optical window of the anvil cell, collecting fluorescent light and reflected light in a pressure cavity of the anvil cell by using a camera, or transmitting the fluorescent light to the integrated circuit module through an optical fiber; the integrated laser module is used for generating laser, realizing power control through a polarization prism and controlling on-off of the laser through an acousto-optic modulator; the integrated circuit module is used for measuring a chromium ion spectrum so as to characterize the pressure in the anvil cell, detecting NV color center fluorescence, providing radio frequency and microwave to drive an acoustic optical modulator and controlling the state of NV color center spin quantum; and the control and data processing module is used for controlling all the components to work cooperatively and processing data so as to realize optical detection magnetic resonance and NV color center spin coherent control experiments.

The invention discloses a microwave transmission system for NV color center magnetic detection and a transmission method thereof, the microwave transmission system for NV color center magnetic detection comprises a microwave generator, a microwave power amplifier, a circulator, an impedance matching adjusting device, a microwave antenna and a 50-ohm terminal load, the microwave power amplifier is connected with the microwave generator through a coaxial cable; the circulator is connected with the output end of the microwave power amplifier; the microwave antenna is connected with the output end of the impedance matching network and used for radiating microwave energy to the NV color center in the blind hole of the diamond anvil cell. The 0.1 mm micro electric small loop antenna is matched with the diamond anvil cell blind hole, the L-shaped LC network is adopted to match the antenna impedance from 0.056 + j3.5 ohm to 50 ohm, microwave reflection is remarkably reduced, the ODMR spectrogram contrast ratio and symmetry are improved, and the magnetic field analysis precision reaches the order of magnitude. A protection mechanism formed by the circulator and the 50-ohm load isolates reflected signals, equipment damage is avoided, it is guaranteed that the system stably operates at the frequency band of 2.4-3.3 GHz, and core hardware support is provided for high-voltage magnetic detection.

The application discloses a heating and temperature measuring device and method for eliminating temperature difference between inside and outside of a sample cavity of a diamond anvil cell, and relates to the technical field of DAC pressure device testing. The device comprises a diamond pad and an electric furnace. The electric furnace is used for being installed on the side of the diamond anvil and transmits heat into the diamond anvil through the diamond pad. The electric furnace and the diamond pad are symmetrically arranged about the axis of the diamond anvil. The method is realized based on the device. The temperature measuring device and method can measure the real temperature of the sample in situ and quantitatively measure the deviation between the measured temperature and the real temperature.

The invention belongs to the technical field of material thermoelectric effect measurement, and particularly relates to a diamond anvil cell high-pressure thermoelectric effect measuring device and method. The measuring device comprises a diamond anvil cell and a multifunctional bottom electrode arranged on the lower anvil surface of the diamond anvil cell, wherein the bottom electrode comprises a heating wire, a thermoelectric voltage measuring electrode, a first temperature measuring electrode and a second temperature measuring electrode which are independently arranged and form a sample measuring area. During measurement, a sample to be measured is placed in a measurement area, electrodes and a measurement instrument are connected through platinum strips and wires to form a measurement system, after pressure calibration and temperature calibration, a heating wire is electrified to establish a stable temperature difference and apply a vertical magnetic field, the temperature difference and a voltage value are obtained through the electrodes and the measurement instrument, and then the Seebeck coefficient and the Nernst coefficient are calculated. According to the method, in-situ high-precision measurement of the thermoelectric parameters of the two-dimensional material can be realized in a high-voltage, extremely-low-temperature and high-intensity magnetic field environment, and key technical support is provided for thermoelectric material research and device development in an extreme environment.

This utility model discloses a diamond press hinge beam casting system, comprising: a core assembly molding system and a gating system. The core assembly molding system uses manual core box making, with partial covering using chromite sand. The core assembly includes multiple sets of outer cores, rod cores, and a central core. The outer skin uses a carbon dioxide ester hardened water glass sand process applied in a molding production line, employing a 3-box + 1-box combination. The gating system combines bottom casting and riser casting. The bottom casting uses a one-to-four reverse pouring method, and the riser casting uses a T-shaped tee method. This utility model meets the casting precision requirements of the product, reduces mold making costs, shortens the production cycle, and improves production efficiency.

The invention discloses an LnCu3 (OH) 6Cl3 (Ln = Nd, Eu, Gd) amorphous material and a preparation method thereof, and belongs to the technical field of high-pressure regulation and control. Pure LnCu3 (OH) 6Cl3 (Ln = Nd, Eu and Gd) crystal powder of a quasi-two-dimensional structure with a space group of P-3m1 is used as an initial raw material, a symmetric diamond anvil cell press is used for pressurizing, the diameter of the anvil surface of the diamond is 500 microns, the pressure is calibrated by adopting a ruby fluorescence pressure calibration technology, the novel quasi-two-dimensional layered amorphous material is obtained, the material composition meets the stoichiometric ratio of Ln: Cu: OH: Cl = 1: 3: 6: 3, and the crystal powder is used for preparing the quasi-two-dimensional layered amorphous material. In-layer atoms are arranged in a long-range disordered manner, and inter-layer atoms are arranged in an ordered one-dimensional stacking manner. The metastable-phase material obtained by a high-pressure technology can stably exist when the pressure is released to normal pressure, the components and the layered structure of the material are kept unchanged before and after phase change, and the spatial arrangement of atoms in the layer is long-range disorder after phase change. According to the method, the novel LnCu3 (OH) 6Cl3 (Ln = Nd, Eu and Gd) amorphous material which can stably exist under normal pressure is obtained by utilizing a high-pressure method for the first time, and deep understanding of the structure and physical properties of the amorphous material is promoted.

The present application relates to the technical field of ultrahigh pressure physical experiment device, and more particularly to a three-inclined-surface diamond anvil and a design method thereof, the anvil comprising a center anvil surface and first, second and third inclined surfaces connected in sequence, each inclined surface having first to third diameters and first to third inclined surface angles increasing along the radial direction, forming a gradientized load transition zone. The design method comprises: establishing a diamond-tungsten gasket coupling constitutive model, parameterizing the three-inclined-surface structure, and performing finite element optimization with the maximum sample cavity center pressure as the target and the maximum principal strain of the diamond as the constraint to determine the optimal geometric parameters. The present application breaks through the traditional 400 GPa pressure bottleneck of the diamond anvil, can realize 600 GPa static high pressure, and reduces the stress concentration and failure risk of the anvil surface.

The utility model discloses a kind of diamond anvil cell press cavity with visual online pressure marking superhigh pressure inflation equipment, including shell, the inside middle position of shell is provided with baffle, the inside below of shell is provided with inner frame, the inside of shell is provided with superhigh pressure operating assembly and superhigh pressure inflation assembly;Superhigh pressure operating assembly includes superhigh pressure container, superhigh pressure container includes shell, the front end of shell is provided with front end sealing mouth, the inside of shell is provided with diamond pressure cavity placement area, the rear end of shell is provided with flange sapphire window sealing area for optical measurement and imaging observation, superhigh pressure operating assembly further includes the pressure calibration and imaging system ruby pressure marking system for diamond pressure cavity in superhigh pressure container;By adopting electrical equipment combination, complete remote operation function, make user operation more safe;Visual cavity design is used, cooperate optical path imaging acquisition system, realize customer visual pressure marking function.

This invention relates to the field of ultra-high pressure physics experimental apparatus, and particularly to a three-faced diamond anvil cell and its design method. The anvil includes a central anvil face and sequentially connected first, second, and third inclined faces. Each inclined face has a radially increasing first to third diameter and a first to third inclined face angle, forming a gradient load-bearing transition zone. The design method includes: establishing a diamond-tungsten gasket coupled constitutive model; parametrically modeling the three-faced structure; performing finite element optimization with the goal of maximizing the pressure at the center of the sample chamber and constraints such as the maximum principal strain of the diamond as the basis; and determining the optimal geometric parameters. This invention breaks through the pressure bottleneck of approximately 400 GPa of traditional diamond anvil cells, achieving a static high pressure of 600 GPa, and reducing the risk of stress concentration and failure at the anvil face.

The utility model relates to a microwave technology-based detection device and method for metallization transformation of substances under high voltage, the detection device is composed of a microwave generator, a DAC detection unit and a parameter detection device, and the DAC detection unit is respectively connected with the microwave generator and the parameter detection device through microwave transmission lines to realize signal transmission. The DAC detection unit is mainly composed of a microstrip line set, an upper diamond and a lower diamond, and the position with the optimal experiment effect is found by changing the width of the lower microstrip line in the DAC detection unit to measure an S parameter response simulation curve. According to the utility model, a mode of combining the microstrip antenna and the diamond anvil cell is adopted to realize the detection of the metallization transformation process of the material under high pressure, the device is simple and reliable in structure, low in power consumption, convenient and easy to use, the detection method is low in experiment cost, and the experiment steps are simple and easy to operate; and the gasket and the sample to be tested are convenient to replace, and the device can be used for researching the high-pressure scientific material metallization or material non-gold transformation process.