33 results about "Garnet crystals" patented technology

The present application relates to a kind of methods and applications of growing bismuth-doped rare-earth iron garnet BRIG crystal by guided mode pulling-top seed crystal method.For solving the problems of large internal stress, many defects, difficult to prepare thick film of single crystal in the current liquid phase epitaxy method of growing BRIG crystal;And the problems of long growth cycle, difficult to obtain seed crystal in top seed crystal method, the present application combines the fast growth of guided mode pulling crystal and the high-quality single crystal growth of top seed crystal method, and invents guided mode pulling-top seed crystal method to realize the fast growth of high-quality BRIG single crystal.First, the large-size doped rare-earth iron garnet crystal with high lattice matching and similar composition is quickly grown by guided mode pulling method, which is cut into centimeter-level seed crystal, and high-quality BRIG bulk single crystal is quickly grown by TSSG method.The crystal grown by this method has the advantages of small internal stress, less cracking, good uniformity, fast crystal growth, etc., and has obvious advantages in high-performance magneto-optical isolator.

The invention relates to a composite garnet electrolyte with a porous surface, a battery and a manufacturing method thereof. The battery includes a cathode, a solid electrolyte, and an anode. The solid electrolyte is a composite garnet electrolyte having an inter-grain microstructure extending from the first major surface with a lithium phase between garnet crystals. The composite garnet electrolyte may have a lithium amount of 11.2 wt% to 15 wt%, 11.3 wt% to 12.2 wt%, or 11.4 wt% to 12 wt%. The composite garnet electrolyte may have 0.1 wt% to 4 wt% more than the stoichiometric lithium amount of the garnet crystal, 0.2 wt% to 1.1 wt%, or 0.3 wt% to 0.9 wt%. The method includes etching at least a first major surface of the composite garnet electrolyte with an acid to form the composite garnet electrolyte having pores. The method may also include casting and firing the green body to form the composite garnet electrolyte.

The invention provides a combined type electronic detector, electronic detection equipment and a detection method, and belongs to the technical field of electronic microscopic imaging. The combined type electronic detector adopts a structure that yttrium aluminum garnet crystals are arranged to partially cover a split type silicon diode detector, so that physical replacement of any detection body is not needed, and the detection efficiency is improved. According to the invention, signals of different areas can be selected and read through an electronic mode, so that an optimal detection mode is called under different working conditions, detection can be realized under the condition of high acceleration voltage, detection can also be realized under the condition of low acceleration voltage, one machine with two purposes is realized, and the performance and the application range of electron beam equipment are greatly improved.

The invention relates to a method for growing a bismuth-doped rare earth iron garnet BRIG crystal by adopting a guided-mode pulling-top seed crystal method and application of the bismuth-doped rare earth iron garnet BRIG crystal. The invention aims to solve the problems of large internal stress, many defects and difficulty in preparation of a single-crystal thick film in BRIG crystal growth by a liquid phase epitaxy method at present; in order to solve the problems of long growth cycle, difficult seed crystal acquisition and the like of a top seed crystal method in the prior art, the invention combines the rapid growth of crystals by a guided mode pulling method and the high-quality single crystal growth by the top seed crystal method, and the guided mode pulling-top seed crystal method is invented to realize the rapid growth of the high-quality BRIG single crystal. The method comprises the following steps: firstly, rapidly growing a large-size rare-earth-doped iron garnet crystal which is high in BRIG crystal lattice adaptation degree and relatively close to BRIG in components by adopting a guided-mode pulling method, cutting the large-size rare-earth-doped iron garnet crystal into seed crystals of more than centimeter level, and rapidly growing a high-quality BRIG blocky single crystal by adopting a TSSG method. The crystal grown by the method has the advantages of small internal stress, less cracking, good uniformity, fast crystal growth and the like, and has obvious advantages in high-performance magneto-optical isolators.

The invention relates to a method for stripping a single-crystal optical fiber from the surface of a rare earth element doped single-crystal material, which adopts an ion beam technology to successfully and directly strip a crystal optical fiber structure from the surface of a rare earth element doped garnet crystal to obtain the single-crystal optical fiber. The length can exceed 1cm, and the device has the capability of guiding optical signal propagation; the physical properties of the crystal material are consistent with those of the crystal material. By means of the optical gain characteristic of the rare earth element doped single crystal material, the single crystal optical fiber can serve as an optical waveguide optical amplifier with excellent performance.

The invention discloses a temperature-driven tunable all-solid-state 1.5-micron cross-polarization dual-wavelength laser, and belongs to the technical field of solid lasers. The laser comprises a laser pumping source, a light beam shaping device and a laser resonant cavity which are sequentially arranged along a light path, a cooling device is mounted outside the laser resonant cavity; the laser resonant cavity comprises a laser crystal arranged on a light path; laser emitted by the laser pumping source passes through the light beam shaping device and then is focused and incident into the laser crystal, and the laser crystal is selected from one of an a-cut Er < 3 + > / Yb < 3 + > double-doped borate crystal, an Er < 3 + > / Yb < 3 + > double-doped vanadate crystal and an Er < 3 + > / Yb < 3 + > double-doped yttrium aluminum garnet crystal. The all-solid-state 1.5-micron cross-polarization dual-wavelength laser with tunable power is realized by utilizing the photo-thermal anisotropy of the a-cut Er < 3 + > / Yb < 3 + > double-doped 1.5-micron laser crystal and adjusting the crystal temperature through the cooling device.

The utility model discloses a novel watt-level solid laser core, which relates to the field of watt-level solid laser cores and comprises a yttrium aluminum garnet doped crystal and a yttrium aluminum garnet crystal which are connected with each other. The number of the doped yttrium aluminum garnet crystal and the yttrium aluminum garnet crystal is one or more; according to the novel watt-level solid laser core, the cost can be greatly saved through a microchip cutting process, the requirement that the light spot diameter is matched with the separation cavity is met by adjusting the cavity length of the core cavity, watt-level pumping power is achieved, and miniaturization is easy.

The invention provides a sealing method of a stainless steel part and a kovar alloy part, a sealing material and a precursor material. The glass prepared from the sealing precursor material comprises the following components in percentage by mass: 60%-70% of SiO2; 5%-15% of Al2O3; 10% to 20% of K2O; 1%-4% of Na2O; 1%-4% of ZnO; 0 to 3 percent of SrO; 30 to 3 percent of B2O3; 0 to 3 percent of Li2O; 0-3% of CaO; and 0-3% of MgO. In the sealing precursor material, raw material selection and content selection are reasonable, and the sealing precursor material is used as a raw material to prepare the sealing material. The sealing material is in a glass phase form with leucite crystals inside, so that the thermal expansion coefficient of the sealing material can reach 11.5 * 10 <-6 > DEG C to 13.0 * 10 <-6 > DEG C <-1 >, the requirements of sealing stainless steel parts and kovar alloy parts are met, and the strength of the sealing material is relatively high.

The invention relates to an iron-based gyromagnetic material calculated based on a first principle and a screening method thereof, the crystal structure of the material is a garnet structure, and the chemical general formula of the material is Sr < x > Y < 3-x > Scy Fe < 5-y > O < 12 >, the value range of x is 0 lt; xlt; 3, the value range of y is 0 lt; yt; Yt; 5. On the basis of a first principle calculation result, a specific doping combination capable of remarkably improving the dielectric constant and improving the saturation magnetization intensity is screened out, namely, a double-ion co-doping strategy that c site is replaced by Sr and a site is replaced by Sc is adopted. According to the method, experiments are guided through theoretical calculation, the problems that a traditional trial-and-error method is long in period and large in blindness are effectively solved, and the iron-based gyromagnetic material with excellent electromagnetic performance is obtained.

The present invention addresses the problem of providing a method for improving photocatalytic performance by using a ferrite material having an easily available element constitution.　The problem is solved by using, as a photocatalyst, ferrite particles having a spinel-type crystal structure, a hexagonal crystal structure, or a garnet-type crystal structure in a magnetic field.

The invention provides a high-pressure oxygen atmosphere annealing device and process for yttrium iron garnet crystals, and the high-pressure oxygen atmosphere annealing device for the yttrium iron garnet crystals comprises a heating furnace, a high-pressure reaction cavity, a homogeneous ceramic sample cavity homogeneous with the yttrium iron garnet crystals, an oxygen supply system and a vacuum pipeline, the invention relates to a high-pressure oxygen atmosphere annealing process for yttrium iron garnet crystals. The high-pressure oxygen atmosphere annealing process comprises the following steps: pretreatment: placing the yttrium iron garnet crystals in a homogeneous ceramic sample cavity; oxygenating and pressurizing; heating and annealing: operating the heating furnace, heating the interior of the high-pressure reaction cavity to 1000-1200 DEG C at the speed of 50-100 DEG C / h, and keeping the temperature constant for 2-10 hours; gradient cooling; and releasing pressure and taking materials. According to the invention, the problems of low annealing efficiency and limited photomagnetic performance caused by insufficient pressure in the prior art are solved.

The application discloses a rare earth ion doped magnesium calcium germanate zirconate fluorescent powder and a preparation method thereof. 3‑x MgZrGe3O 12 :xR, wherein 0.005<=x<=0.500. Ca3MgZrGe3O 12 :xR as a matrix material, and the doped R as a central light emitting ion, and R is one or a combination of several of rare earth Ce, Tb, Eu, Dy, Sm, Bi and Cr ions. The fluorescent powder is prepared by a high-temperature solid phase method. Powder diffraction data show that the sample belongs to a garnet crystal phase. The prepared fluorescent powder can be excited by violet light or blue light, and has a strong light output in a visible light region. The magnesium calcium germanate zirconate fluorescent powder is simple to manufacture, has good light stability, and can be used for a light emitting layer of a white light LED.

This utility model discloses an online monitoring device for transformer winding temperature based on fiber optic temperature measurement, belonging to the field of temperature monitoring technology. It includes a temperature probe, a fiber optic transmission assembly, a control box, and a display panel. The temperature probe is composed of a quartz optical fiber coated with a high-temperature resistant polyimide coating. A europium-doped yttrium aluminum garnet crystal temperature sensor is fused to the end of the fiber. The temperature sensor is covered with an alumina ceramic protective layer. The temperature probe is embedded in the interlayer gap of the transformer winding conductors. The fiber optic transmission assembly uses a double-armored composite optical cable, with both ends connected via fiber optic connectors. The control box includes a metal heat sink, a detection circuit housed within the casing, and a microcontroller. The display panel is integrated onto the surface of the control box and electrically connected to the microcontroller. The display panel also includes a dual-color LED alarm light group and a miniature buzzer. This utility model can accurately and stably measure the temperature of transformer windings and achieve online monitoring.

The utility model relates to the technical field of crystal production temperature fields, and discloses an erbium-doped yttrium aluminum garnet crystal production temperature field structure which comprises a metal cover sleeved on the outer side of a crucible, and the metal cover is located in the middle of the upper end of a base inside a box body; the outer side of the metal cover is sleeved with heaters which are distributed at equal intervals up and down, middle heat preservation spaces are formed in the heaters, outer heat preservation spaces are formed between the heaters and the heat preservation cylinder, inner heat preservation spaces are formed between the heaters and the metal cover, and air guide pipes located in the inner heat preservation spaces are connected between the adjacent annular bases; the inner side heat preservation space, the middle heat preservation space and the outer side heat preservation space on the outer side of the crucible are all filled with high-temperature air, heat preservation of the crucible is achieved, meanwhile, hot air in the inner side heat preservation space can be prevented from entering the middle heat preservation space and the outer side heat preservation space through the arrangement of the air guide pipes, and the heat preservation effect is good. The highest temperature of air in the inner side heat preservation space is guaranteed, and the heat preservation effect on the crucible is guaranteed.

The application discloses a method for extracting and separating yttrium and neodymium in neodymium-doped yttrium aluminum garnet in a non-aqueous phase solvent system. Cyanex 272 is used as an extractant, polar organic solvents such as polyethylene glycol (PEG 200) are mixed with water to obtain a high-polarity organic phase, and 260# solvent oil is used as a low-polarity organic phase, and the two phases are mixed to form a non-aqueous phase solvent extraction system. Under the condition of the non-aqueous phase solvent extraction system of 0.4 mol / L Cyanex 272-80 vol% PEG 200, the extraction efficiency of yttrium is as high as 97.99%, and the separation factor of yttrium and neodymium is as high as 3520. In addition, under the optimal condition, the experiment of extracting and separating yttrium and neodymium in neodymium-doped yttrium aluminum garnet crystal waste is carried out, the extraction efficiency of yttrium can reach 98.60%, the separation coefficient of yttrium and neodymium can reach 1010, and the efficient separation of yttrium and neodymium is realized. Therefore, the application provides a new method and idea for efficiently separating and recovering yttrium and neodymium in neodymium-doped yttrium aluminum garnet crystal waste.

The invention provides a high-energy thulium pump holmium laser oscillation amplifier, and belongs to the technical field of solid lasers, and the high-energy thulium pump holmium laser oscillation amplifier comprises a pumping source which comprises a thulium-doped yttrium aluminum garnet crystal and is used for outputting pumping laser of a first wavelength; the oscillator comprises a holmium-doped yttrium aluminum garnet crystal and is used for generating seed laser with a second wavelength by taking the pump laser as pump light; the amplifier comprises a holmium-doped yttrium aluminum garnet crystal and is used for amplifying the seed laser by taking the pump laser as pump light; wherein the first wavelength is not located on an absorption main peak of the holmium-doped yttrium aluminum garnet crystal. According to the invention, high-energy narrow-pulse two-micron laser output is realized, and meanwhile, good thermal management performance and system stability are achieved.

The invention discloses a rare earth doped aluminum gallate silicon-based electroluminescent device and a preparation method thereof. The whole device structure comprises a transparent conductive layer, a transparent nano layered dielectric layer, a rare earth doped aluminate and gallate luminescent layer, a silicon substrate and a metal Al back electrode from bottom to top in sequence. An aluminum gallate thin film with a rare earth doped Re3 (Al, Ga) 5O12 garnet crystal phase and a Y (Al, Ga) 2O4 spinel crystal structure is deposited by adopting an atomic layer deposition technology to serve as a luminescent material, and the crystallization temperature of the luminescent thin film prepared by adopting the atomic layer deposition method is 200 DEG C or above lower than that of a traditional high-temperature solid-phase method. The composite film silicon-based MOS structure electroluminescent device made of the aluminum gallate and the high-dielectric-constant nano layered dielectric material has an active negative feedback breakdown-resistant electric transport stable mechanism, the uniformity of light emission is good, the efficiency is high, the breakdown-resistant voltage is doubled, and the breakdown current density is improved by more than 100 times. By doping different rare earth ions, the light-emitting wavelength can cover infrared, visible light and ultraviolet wave bands.

The utility model discloses a garnet isolator structure, an optical part and an optical module, which comprises a polarizer and an analyzer which are arranged at an interval along the X-axis direction, and a first glass strip and a second glass strip which are arranged at an interval along the Z-axis direction are arranged between the polarizer and the analyzer. Garnet crystals are arranged between the first glass strip and the second glass strip. According to the garnet isolator, the manufacture cost of the garnet isolator can be effectively reduced while the isolation of the reverse light is effectively realized.

Batteries include a cathode, a solid-state electrolyte, and an anode. The solid-state electrolyte is a composite garnet electrolyte with an intergranular microstructures extending from a first major surface with a lithium phase between garnet crystals. In aspects, the composite garnet electrolyte can have an amount of lithium from 11.2 wt% to 15 wt%, from 11.3 wt% to 12.2 wt%, or from 11.4 wt% to 12 wt%. In aspects, the composite garnet electrolyte can have greater than a stoichiometric amount of lithium for the garnet crystals by from 0.1 wt% to 4 wt%, from 0.2 wt% to 1.1 wt%, or from 0.3 wt% to 0.9 wt%. Methods include etching at least a first major surface of a composite garnet electrolyte with an acid to form the composite garnet electrolyte with pores. In aspects, methods can further include tape casting and firing a green body to form the composite garnet electrolyte.

The application discloses a garnet crystal growth device, which comprises a crucible, a central shaft, a clamp and a substrate, a molten liquid is arranged in the crucible, the lower end of the central shaft is connected with the clamp, the clamp holds the substrate, the substrate rotates on the upper surface of the molten liquid, a first cover plate is arranged on the mouth of the crucible, a first through hole is arranged in the center of the first cover plate, and the central shaft is arranged through the first through hole; a first baffle is connected with the central shaft, and the first baffle covers the first through hole. Compared with the prior art, the application has the beneficial effects that: the first cover plate is arranged on the mouth of the crucible, the first through hole is arranged in the center of the first cover plate, and the central shaft is arranged through the first through hole; the gas flow towards the inside of the crucible is prevented. The first baffle is connected with the central shaft, and the first baffle covers the first through hole. The gas flow through the first through hole is further prevented. The temperature distribution field in the inside of the crucible is avoided from being disturbed.

The invention discloses a stripline resonator structure and a magnetic tuning trap composed of the resonator structure, belonging to the technical field of electronic components; the stripline resonator structure consists of a stripline central conductor, a stripline outer conductor, a gadolinium gallium garnet crystal and a YIG single crystal film, wherein the stripline central conductor, the YIG single crystal film and the gadolinium gallium garnet crystal are arranged in sequence in the stripline outer conductor; the invention realizes the planarization of the resonator of the magnetic tuning trap, simplifies the design of the stripline resonant circuit structure; adopts the stripline transmission mode, expands the passband operating frequency of the magnetic tuning trap; multiple stripline resonant circuits can be arranged on the same plane, which is easy to integrate multi-channel traps; the resonant circuit adopts multiple single crystal film blocks to form a resonator cascade, effectively suppresses multiple excitation modes of the single crystal film, increases the stopband depth of the trap, and improves the performance of the trap.

The utility model relates to a film plating fixture technical field, especially a kind of chromium-doped yttrium aluminium garnet crystal's film plating fixture, including mounting seat;And, drive assembly, including screw rod, the inner tangent ring being set in the outer wall of screw rod and the moving block being set in the end surface of inner tangent ring, the outer wall both sides of screw rod are equipped with the thread of opposite rotation;And, clamping assembly, including the positioning plate being set in the outer side of moving block and the positioning part being set in the end surface of positioning plate, drive assembly further include the motor being set in the outer side of mounting seat, the outer wall of motor is fixedly connected with first mounting plate, first mounting plate is L type structure design, first mounting plate is installed in mounting seat end surface, the utility model is positioned to the yttrium aluminium garnet crystal by the replaceable clamping assembly, since yttrium aluminium garnet crystal has multiple shapes, utilize the clamping of replaceable clamping part can satisfy the clamping demand under different conditions, cooperate drive assembly can make the stable clamping of clamping assembly to crystal.

A wavelength conversion member (3) has a phosphor material represented by the general formula (BaxLuzY3-x-y-z)(Al5-xSix)O12:Cey (where x + y + z < 3, x < 3, x > 0, y > 0, z > 0) with a cubic garnet crystal structure with a Ia3d space group.

A phase-modulated approach for ultrabroadband Fourier transform electronic spectroscopy is presented. To overcome the bandwidth limitations and spatial chirp introduced by acousto-optic modulators (AOMs), pulses from a 1 μm laser are modulated using AOMs prior to continuum generation. This phase modulation is transferred to the continuum generated in an Yttrium Aluminum Garnet crystal. Separately generated phase-modulated continua in two arms of a Mach-Zehnder interferometer interfere at the difference of their modulation frequencies, enabling physical under-sampling of the signal and the suppression of low-frequency noise. By interferometrically tracking the relative time delay of the continua, one can perform continuous, rapid-scanning Fourier transform electronic spectroscopy with a high signal-to-noise ratio and spectral resolution.

The invention belongs to the technical field of magneto-optical crystal preparation, and relates to a bismuth-doped europium yttrium iron garnet magneto-optical crystal and a preparation method and application thereof. According to the preparation method, a magneto-optical crystal with a chemical formula of Eu < 3-x-y-z > Bi < x > Y < y > Tb < z > Fe < 5-w > Ga < w > O < 12 > is grown by adopting a top seed crystal method, wherein x ranges from 0.30 to 0.43, y ranges from 1.20 to 2.06, z ranges from 0.08 to 0.17, and w ranges from 0.09 to 0.17. The method has the advantages of high crystal growth speed, simple process and the like, and can be used for preparing centimeter-level single crystals. A Bi2O3-Fe2O3 self-service solvent is used for crystal growth, and compared with a Pb-containing cosolvent system, the Bi2O3-Fe2O3 self-service solvent is more environmentally friendly, and harm to a human body and pollution to the environment can be reduced. The Faraday rotation angle of the garnet crystal can be increased by doping Bi in a proper amount.

The invention provides a praseodymium ion-doped yttrium gallium aluminum garnet scintillation crystal material and a preparation method and application thereof, and the method comprises the following steps: weighing required raw materials according to a stoichiometric ratio specified by a chemical formula of the scintillation crystal material, grinding, tabletting and sintering for many times to prepare a polycrystalline raw material, and sintering to obtain the praseodymium ion-doped yttrium gallium aluminum garnet scintillation crystal material. And then preparing the high-quality praseodymium ion doped yttrium gallium aluminum garnet scintillation crystal material by adopting a micro down-draw method. According to the technical scheme, the yttrium aluminum garnet crystal is doped with praseodymium ions, so that a unique 4f electronic structure of the yttrium aluminum garnet crystal can be utilized to endow the crystal material with excellent luminescence performance, especially 5d-4f transition allowed by complete spin-space, and the crystal material has efficient scintillation response capability; by introducing the gallium element, part of the aluminum element can be replaced by the gallium element, so that the conduction band of the garnet system scintillator is reduced, some shallow energy level traps such as oxygen vacancies are submerged, and the scintillation performance of the crystal material is effectively improved.

The application discloses a phonon band edge line polarized laser, and belongs to the technical field of lasers. Compared with a traditional band edge laser obtained by stimulated Raman scattering effect, the electronic-phonon coupling process only involves laser effect, the device is simple in design, and is good in performance stability. The laser comprises an excitation source, a focusing system, a laser medium crystal and a laser resonant cavity. The excitation source emits laser with a wavelength of 780nm-880nm. The laser medium crystal is a neodymium ion doped yttrium aluminum garnet crystal, the crystal is a gain medium in the laser, belongs to a cubic crystal structure, and is optical isotropic. The laser resonant cavity is composed of an input mirror and an output mirror, and is coated with a suitable film system to obtain effective output of 1100nm-1200nm band electronic-phonon coupling laser, and the polarization of the laser depends on the lattice vibration mode involved in the coupling. The laser has the advantages of simple and compact structure, low cost and high working stability.

The invention relates to the technical field of crystal manufacturing, in particular to a melting furnace for preparing yttrium aluminum garnet crystals, which comprises a supporting seat and a lifting heating assembly arranged at the top of the supporting seat, and the lifting heating assembly comprises a heating piece arranged at the top of the supporting seat and a lifting containing piece arranged in the heating piece. When materials need to be melted, the materials are placed in the lifting containing piece, the heating piece is started at the moment, and the heating piece drives the materials to ascend to a heating position through the lifting containing piece and heats and melts the materials. At the moment, the heating piece drives the materials to continuously rotate and intermittently shake up and down through the lifting material containing piece, so that accumulation of the materials in the middle of the lifting material containing piece is prevented, and meanwhile, the heating piece drives the reciprocating slag salvaging assembly to automatically salvage the dross at the upper ends of the materials.

This invention discloses a temperature field for epitaxial growth of garnet crystals, comprising a crucible, a central shaft, a clamp, and a substrate. Molten liquid is contained in the lower part of the crucible, and one end of the central shaft is connected to the clamp, which holds the substrate, which rotates on the surface of the molten liquid. A first heater and a second heater are disposed around the outer periphery of the crucible, respectively located at the lower and upper parts of the crucible. The heat generated by the first heater heats the molten liquid through the sidewall of the crucible; the heat generated by the second heater heats the internal gas of the crucible through the sidewall, ensuring a uniform temperature throughout the crucible. Crystallization occurs only on the surface of the substrate. The resulting garnet crystals have a crack-free, line-free, and impurity-free surface, exhibit consistent growth rates at all locations, uniform thickness, and meet the required epitaxial dimensions. This invention also provides a method for growing garnet crystals.

To provide an additive which can be added to an electrode of a lithium ion secondary battery to improve its characteristics.SOLUTION: An additive for a lithium ion secondary battery electrode, comprising a composite oxide having a garnet-type or garnet-like crystal structure containing elements Li, La, Zr, and O, wherein a part of the elements Li is substituted with an element A which is different from the elements and can form a Li site vacancy, a ratio of the Li site vacancies is 40% or more and 80% or less, and an ionic conductivity at room temperature is 1 * 10 - 5S / cm or more.SELECTED DRAWING: Figure 2