51 results about "Optical thermometry" patented technology

The invention discloses a red up-conversion luminescent material, which belongs to the field of inorganic luminescent materials, the chemical formula of the material is NaEr < 0.65 > F4: Yb < 0.2 > / Gd < 0.1 > / Tm < 0.05 >, and up-conversion microparticles of the red up-conversion luminescent material are used as a bifunctional luminescent temperature sensor which can be used for a 293348 K low-temperature region sensitization sensor and a 348498 K high-temperature region thermal quenching sensor. After near-infrared light with the wavelength of 980 nm excites Yb < 3 + > ions, through efficient energy transfer between Er < 3 + > and Tm < 3 + >, different changes of near-infrared response type 654 nm and 808 nm red up-conversion luminescence characteristics can be used for non-contact optical temperature measurement under the extreme temperature condition. Temperature detection is realized based on thermal coupling energy levels of 4F9 / 2 to 4I15 / 2 and 3H4 to 3H6, and the distance between two emission peaks is large, so that the data processing error is greatly reduced; excitation light and emission light are located in an optical window of the biological tissue, and absorption and self-fluorescence of the biological tissue are greatly reduced. The preparation method is based on the green chemistry concept, takes water as a solvent and adopts a one-step hydrothermal method for synthesis, the preparation method is simple, the required temperature is low, the preparation process is easy to control, the material crystal phase is good, the phase is uniform, the yield is high, the material performance is stable, and the good temperature response effect is achieved.

The invention discloses lead-free perovskite Cs2NaHoBr6 as well as a fractal structure, a preparation method and application thereof, and belongs to the technical field of photoluminescence and fractal crystal growth. The lead-free perovskite Cs2NaHoBr6 is successfully synthesized through a novel solvent boiling method, and compared with a traditional fluorescence thermal quenching perovskite material, the lead-free perovskite shows thermally enhanced red light and near infrared light emission under excitation of ultraviolet light, blue light and near infrared light, has up-conversion and down-conversion luminescence capabilities, and can be used for preparing a luminescent material. The emission peak intensity is in positive correlation in the range of 293-593 K, and an abnormal heat quenching resistance behavior is shown. Cs2NaHoBr6 powder is dissolved in an anti-solvent, and a fractal structure pattern with preferred orientation and self-similarity characteristics is prepared by using an in-situ solution crystallization method, so that the temperature sensing performance of the compound is remarkably improved, the relative sensitivity of the compound is enhanced from 1.14% K <-1 > to 2.60% K <-1 >, and the compound shows a good application prospect in the aspect of non-contact optical temperature measurement.

The invention discloses an upconversion luminescent material with inverse thermal quenching and thermal quenching functions, and belongs to the field of rare earth luminescent materials, the chemical formula of the material is NaEr0. 695F4: Yb0.2 / Gd0.1 / Eu0.005, the material morphology is in a micron-scale hexagonal disc shape, and NaEr0. 695F4: Yb0.2 / Gd0.1 / Eu0.005 upconversion microparticles are used as a bifunctional upconversion luminescent temperature sensor, a sensitization sensor and a thermal quenching sensor, and can be used for detecting the temperature of a luminescent device. And the method can also be used for non-contact optical temperature measurement or high-sensitivity optical temperature measurement under an extreme temperature condition. The temperature detection is realized based on the thermal coupling energy level, the distance between two emission peaks is large, and the data processing error is greatly reduced; the up-conversion luminescence intensity of the energy level can be enhanced along with the rise of the temperature and is called inverse heat quenching, and the temperature sensing performance is better. The invention also discloses a preparation method of the material, the operation is simple, the material crystal phase is good, the phase is uniform, the yield is high, the material performance is stable, and the material has a good bifunctional temperature response effect.

This invention belongs to the field of luminescent materials technology, and discloses a green phosphor, its preparation method, and its application. The green phosphor has the chemical formula CaY. 1‑x GaO4:xCe 3+ Wherein, 0.02 ≤ x ≤ 0.2. The green phosphor of this invention, due to its specific composition, can be used not only in non-contact optical temperature measurement but also in indoor lighting. When applied to optical temperature measurement, it offers advantages such as rapid response, high resolution, high sensitivity, high temperature resistance, and no need for direct contact with objects. Furthermore, when mixed with blue LED chips and commercially available red phosphor, it can be used as a warm white LED device, which features low cost, stable performance, and good luminous effect.

The invention discloses a long-afterglow luminescent nano material for optical temperature measurement and a preparation method thereof, and relates to the technical field of optical temperature measurement. The chemical formula of the long-afterglow luminescent nano material is Zn3Ga2Ge2O10: x% Cr < 3 + >: y% Sm < 3 + >, wherein x is equal to 0.1-1.2, and y is equal to 0-10 and is not equal to 0. The long-afterglow luminescent nano material is prepared by a citric acid sol-gel method, shows huge potential in the field of optical temperature measurement by virtue of excellent luminescent property, ultra-long afterglow time and high sensitivity, and can meet the temperature measurement requirements in various complex and extreme environments.

The invention provides an erbium-ytterbium ion doped Al2O3-YAG composite ceramic sensing material and a preparation method thereof, and belongs to the technical field of crossing of functional ceramic materials and optical sensing technologies, the erbium-ytterbium ion doped Al2O3-YAG composite ceramic sensing material comprises a matrix phase and doped ions, the matrix phase is Al2O3-YAG (aluminum oxide-yttrium aluminum garnet) composite ceramic; wherein the mass ratio of Al2O3 is 30%-70%, and the mass ratio of YAG is 30%-70%; the doping ions are Er < 3 + > and Yb < 3 + >, and based on the total molar weight of the matrix phase, the doping concentration of Er < 3 + > is 0.5-3 mol%, and the doping concentration of Yb < 3 + > is 5-20 mol%; the sensing material realizes temperature sensing under the excitation of 980 nm laser and on the basis of the energy level emission conditions of 2H11 / 2 to 4I15 / 2 and 4S3 / 2 to 4I15 / 2 of Er < 3 + >. The Al2O3-YAG composite ceramic is used as an Er < 3 + > / Yb < 3 + > doped matrix for optical temperature measurement for the first time, and the high-temperature stability is superior to that of fluorescent powder and glass materials; the mechanical strength and the thermal shock resistance are obviously improved; elements are uniformly distributed, and the concentration quenching effect is avoided.

The application discloses a vanadium ion doped phosphate-based luminescent material, a preparation method and application thereof, and a chemical general formula of the luminescent material is Ca9AlP 7(1‑x) O 28 :xV 5+ , wherein x=0.005-0.04. The luminescent material can generate wideband emission from 400nm to 600nm under excitation of 300nm ultraviolet light, and the peak position is near 480nm. The vanadium ion doped phosphate-based luminescent material emits a spectrum with an integral intensity Omega, which changes as a function of temperature T, Omega=1.457*exp(-T / 145.367)-0.169, and the relative sensitivity obtained at 250 DEG C reaches 2.03% DEG C ‑1 . The material has application potential in the field of optical thermometers and the like. In addition, the luminescent material has the advantages of simple preparation method, low cost and the like.

The present invention 3+ Rare earth ion doped Lu4Zr3O 12 This paper discloses a functional nanocrystalline glass and a method for manufacturing the same. The glass components include, in mole percent, SiO2: 57-59, Al2O3: 12-16, ZnO: 14-18, Li2O: 6-8, ZrO2: 3-5, Lu2O3: 2-3, and Er2O3: 0.05-0.2, and the sum of the glass components is 100. The present invention uses a combination design and heat treatment process control to add Er to the glass. 3+ Rare earth ion doped Lu4Zr3O 12 The present invention achieves the controllable fabrication of functional nanocrystals of glass, which have potential applications in low-temperature optical thermometry.

The invention relates to the technical field of optical temperature measurement materials, in particular to a preparation method, a temperature measurement method and application of an up-conversion fluorescence temperature measurement material based on Sc2W3O12. The chemical composition formula of the temperature measuring material is Sc2W3O12: x% Yb and y% Er, x is 10% + / -0.5%, and y is 4% + / -0.2%, and the method comprises the following steps: S1, weighing Sc2O3, WO3, Er2O3 and Yb2O3 according to the stoichiometric ratio; s2, adding absolute ethyl alcohol, grinding until the slurry is uniform, drying, and sieving to obtain a mixture; s3, the mixture is subjected to heat preservation at 500 DEG C for 2 h, residual ethyl alcohol and adsorbed water are removed, and a presintering treatment material is obtained; and S4, putting the pre-sintered material into a corundum crucible, sintering in an air atmosphere, naturally cooling, and grinding into powder to obtain the temperature measurement material. According to the up-conversion fluorescence temperature measurement material based on Sc2W3O12, it can be ensured that the luminous intensity is stable in the whole interval of 30-270 DEG C, the long-term temperature measurement requirement is met, only grinding, drying, pre-sintering at 500 DEG C and subsequent sintering are needed in the preparation process, the steps are simple, large-scale production is easy, and the application cost and the application threshold are reduced.

The invention discloses a carbon dot-engineering plastic composite coating for optical temperature measurement and a preparation method thereof. The carbon dot-engineering plastic composite coating comprises the following components in parts by mass: 1-20 parts of carbon dots; and 1-3 parts of engineering plastic. The preparation method comprises the following steps: adding deionized water into a citric acid raw material and an arginine raw material to obtain a solution A, adding formic acid, adjusting the pH value of the solution, adding the solution into a reaction kettle, placing the reaction kettle in a drying oven, heating to obtain a solution B, performing centrifugal purification and drying to obtain an oily substance C, mixing the oily substance C with an engineering plastic solution to obtain a mixture D, pouring the mixture D into a spray cup, spraying the mixture D on a substrate, and performing drying to obtain a finished product. And putting into a drying oven for firing. The composite coating disclosed by the invention not only can be used as a luminescent material to be widely applied to the fields of frictional wear, non-contact temperature measurement, equipment surfaces and the like, but also can be used for measuring the temperature of the surface of mechanical equipment through the composite coating, so that the use efficiency of the equipment is improved, the service life of the equipment is prolonged, and the use safety is improved.

The invention provides a light field multispectral temperature measurement method and system based on an infrared sensor. The method comprises the following steps: calculating optical parameters of a microlens array and a filter array according to an optical formula; then, processing and manufacturing a micro-lens array through photoetching, developing, pressing a plate and atomic force scanning; secondly, building an infrared light field multispectral radiation temperature measurement system; calibrating the system by using a blackbody furnace to obtain a corresponding relation between the camera output signal intensity and the standard temperature; decoupling the multispectral light field image according to the imaging characteristics of the light field camera; and finally, the real temperatures of the object points of the high-temperature component are calculated in sequence by using the decoupled data, and a two-dimensional real temperature field of the high-temperature component is obtained. According to the invention, the limitation of multi-spectral temperature measurement based on a visible light field is solved, the multi-spectrum of the light field is combined with an infrared imaging technology, the measurement of a two-dimensional temperature field is realized, and the defects that an existing optical temperature measurement system is complex in structure, and the temperature measurement precision and breadth cannot be considered at the same time are effectively overcome.

The invention discloses an optical temperature measurement luminescent material, the chemical composition general formula of the luminescent material is Sc2-x-yMo3O12: xSm < 3 + >, yEu < 3 + >, x is more than or equal to 0.01 and less than or equal to 0.05, and y is more than or equal to 0.01 and less than or equal to 0.05. A preparation method of an optical temperature measurement luminescent material comprises the following steps: (1) taking an oxygen-containing compound containing elements of Sc, Sm, Mo and Eu as a raw material, weighing corresponding raw materials according to a molar ratio of each element in a chemical composition general formula Sc2-x-yMo3O12: xSm < 3 + > and yEu < 3 + >, x and y being doped molar fractions of Sm < 3 + > and Eu < 3 + >, 0.01 < = x < = 0.05, and 0.01 < = y < = 0.05; (2) fully grinding the weighed raw materials in a mortar, and uniformly mixing to obtain a solid mixture; (3) sintering the solid mixture in an air atmosphere; and (4) cooling the sintered product to room temperature along with the furnace, and grinding with a mortar to obtain Sm < 3 + > and Eu < 3 + > doped Sc2Mo3O12 powder.

The application belongs to the field of rare earth (RE) up-conversion and down-conversion fluorescence temperature measurement sensing applied to anti-counterfeiting, and relates to a fluorescence temperature measurement material applied to multicolor anti-counterfeiting and a preparation method thereof. CsCl, NaCl, BiCl3 and RECl3·6H2O powders are weighed and mixed, wherein RE is Ho or Yb, and the mixed powders are mixed with an analytical pure HCL solution, the mixed solution is put into a teflon-lined autoclave, and the solution is reacted at a certain temperature, and after the reaction, colorless transparent crystal particles are observed through centrifugation and drying. The Cs2NaBiCl6 doped fluorescent powder prepared by the application has a thermal enhancement characteristic. The application belongs to the technical field of rare earth fluorescence temperature measurement sensors, and results show that the application is a multicolor light emitting and high sensitivity optical temperature measurement material, and is a multifunctional material that can be applied to anti-counterfeiting and fluorescence thermometers.

This invention provides a method and system for multispectral temperature measurement based on an infrared sensor. The method includes: calculating the optical parameters of a microlens array and a filter array according to optical formulas; then fabricating the microlens array through photolithography, development, pressing, and atomic force scanning; next, constructing an infrared multispectral radiation temperature measurement system; calibrating the system using a blackbody furnace to obtain the correspondence between the camera output signal intensity and the standard temperature; decoupling the multispectral light field image based on the imaging characteristics of the light field camera; and finally, using the decoupled data to sequentially calculate the true temperature of points on the high-temperature component, obtaining the two-dimensional true temperature field of the high-temperature component. This invention overcomes the limitations of visible light multispectral temperature measurement by combining multispectral light field measurement with infrared imaging technology to achieve two-dimensional temperature field measurement, effectively overcoming the shortcomings of existing optical temperature measurement systems, such as complex structure and inability to simultaneously achieve both high measurement accuracy and wide range.

The invention discloses Tb-doped fluorescent powder for optical temperature measurement and a preparation method and application thereof, and belongs to the technical field of luminescent materials, the molecular formula of the fluorescent powder is Na2Ca2Sc2Si3O12: xTb < 3 + >, and x is equal to 0.12-15%. The preparation method comprises the following steps: weighing the raw materials according to the stoichiometric ratio, mixing and grinding, heating and preheating the obtained powder, quickly heating and calcining, and crushing and grinding after calcining to obtain the Tb-doped fluorescent powder for optical temperature measurement. The obtained fluorescent powder is wide in temperature measurement range, light emitting color can be regulated and controlled, and the fluorescent powder has good optical temperature measurement performance within the ultra-wide range of 120K-720K.

A system, apparatus and method directed to determining a temperature within a patient body, including an optical fiber with one or more core fibers. The system can include a console having non-transitory computer-readable medium storing logic that, when executed, causes operations of providing an incident light signal to the optical fiber, receiving a reflected light signal of the incident light, processing the reflected light signal to determine a temperature within the patient body near a measurement region. The method may include determining a location of a distal tip of the optical fiber within the patient body at least based on the temperature.

The invention belongs to the technical field of luminescent materials, and discloses green fluorescent powder as well as a preparation method and application thereof. The chemical formula of the green fluorescent powder is CaY (1-x) GaO4: xCe < 3 + >, and x is more than or equal to 0.02 and less than or equal to 0.2. Due to the specific composition, the green fluorescent powder disclosed by the invention not only can be used in the field of non-contact optical temperature measurement, but also can be used in the field of indoor illumination. When being applied to optical temperature measurement, the optical temperature sensor has the advantages of quick effect, high resolution, high sensitivity, high temperature resistance, no need of direct contact with an object and the like. And after being mixed with a blue light chip and commercial red fluorescent powder, the light-emitting material can be used as a warm white light LED device, and has the advantages of low cost and stable performance, and the obtained warm white light LED device has a good light-emitting effect.

The application provides a chamber temperature measuring device and a chemical vapor deposition equipment, the chamber wall of the chemical vapor deposition equipment can transmit infrared radiation, the chamber temperature measuring device is installed outside the chamber wall, comprising: an optical temperature measuring device, which measures the temperature of an object to be measured in the chemical vapor deposition equipment through the infrared radiation; a connecting piece having opposite first and second ends, the optical temperature measuring device is installed on the first end, the second end is connected to the chamber wall, and a light path channel is arranged inside the connecting piece and penetrates through the first and second ends, and the chamber wall connected to the second end is cooled by passing a purge gas in the light path channel. The application can improve the accuracy of temperature measurement without affecting the mechanical strength of the chamber wall.

The application relates to the technical field of optical temperature measurement, and discloses a fiber temperature measurement method based on fusion of fluorescence intensity ratio and lifetime dual parameters, which comprises the following steps: constructing a fluorescence probe containing co-doped erbium / ytterbium ions, synchronously collecting fluorescence decay signals of 552 nm and 662 nm wave bands, respectively calculating fluorescence intensity ratio and weighted average lifetime, establishing a three-dimensional decoupling model based on a multi-physical field calibration experiment, realizing joint inversion of the dual parameters by using a radial basis neural network, accurately solving a temperature value, and simultaneously outputting pressure and strain estimation. An online self-calibration mechanism is introduced to compensate for material aging drift. According to the application, high-precision temperature measurement of + / -0.5 DEG C can be realized in a strong interference environment without an additional reference sensor, and the robustness and applicability are significantly improved.

The invention belongs to the technical field of fluorescent materials, and discloses fluorescent powder as well as a preparation method and application thereof. The chemical formula of the fluorescent powder is Ba < 2.92 > Mg < 0.08 > BP3O12: 12% Eu < 2 + > / Eu < 3 + >. The fluorescent powder not only can be applied to the field of optical temperature measurement, but also can be applied to the field of white light LED illumination. When being applied to optical temperature measurement, the optical temperature sensor has the advantages of quick effect, high resolution, high sensitivity, high temperature resistance, no need of direct contact with an object and the like, and can still ensure high discrimination degree of signals while performing high-sensitivity test. The fluorescent powder can be used as a white light LED device after being mixed with commercial fluorescent powder, white light emitted by the prepared LED device is high in color rendering index and high in luminous efficiency, and the light color does not change along with the change of current and temperature and is stable.

The utility model relates to the field of special metallurgy, and discloses an optical temperature measuring device for a vacuum induction melting furnace, which comprises a water-cooling connecting assembly, a temperature measuring light ray passes through the center of the water-cooling connecting assembly, the water-cooling connecting assembly is fixed on an observation port on the side wall of a chamber of the vacuum induction melting furnace, and a first end of the water-cooling connecting assembly faces the melting furnace; the second end is hermetically connected with the first end of the vacuum ball valve; temperature measuring light can pass through the vacuum ball valve; the detachable glass window sealing cover is arranged at the second end of the vacuum ball valve; the first bracket is fixed at the second end of the vacuum ball valve; the second bracket is fixedly connected with the first bracket; the holder is fixed on the second bracket; and the optical temperature measuring device is arranged on the holder. According to the optical temperature measuring device, the temperature measuring accuracy can be improved, the service life of the optical temperature measuring device can be prolonged, and the technical problems that a temperature measuring light path is sealed, the service life of a glass window is short, the use safety of the glass window is low, and temperature measuring light is blocked by glass window stickers are fundamentally solved.

The application provides a kind of temperature control method of radiation heating lamp based on voltage control, specifically relates to the field of semiconductor technology.The method first calculates the voltage value and measured temperature of each group of heating lamp by thermal simulation software, and obtains the regression matrix by the above two groups of data;Then lock the emissivity of optical pyrometer, obtain the correction coefficient of each temperature measuring point, and then obtain the corrected temperature value of each temperature measuring point;The thermal effective coefficient of each group of heating lamp is obtained by simulation, and the real voltage of each group of heating lamp is obtained;Finally, according to the input value of the first iteration obtained by the regression matrix, the ideal voltage value of each group of heating lamp is obtained by iterative method.This method does not need manual calculation, only needs to calculate the initial voltage value of each group of heating lamp in the initial first cycle stage by simulation, and can gradually optimize the algorithm by automatic iteration, meet the requirements of wafer heating on time efficiency and temperature uniformity.

The utility model discloses a calibration system of an infrared thermometer, which is applied to an optical temperature measurement technology and comprises an infrared light source, a ray casting converter, an infrared detector and an information processor, the center of the infrared light source, the optical axis of the ray casting converter and the center of the infrared detector are aligned; wherein the infrared light source emits an infrared radiation signal to the light projection conversion device; the light ray projection conversion device is used for focusing and projecting the received infrared radiation signal or converting the received infrared radiation signal into parallel light rays and projecting the parallel light rays to the infrared detector, so that the optical lens is calibrated during clear imaging; and the infrared detector is used for receiving the infrared radiation signal and sending the infrared radiation signal to the information processor. According to the calibration system, the problem of low temperature measurement precision in the prior art can be solved, and the temperature measurement precision of the calibration system of the infrared thermometer can be effectively improved.

The application discloses a kind of dual-phase glass ceramic material and its independent dual-mode near-infrared optical temperature measurement application, the composition formula of the glass matrix of the dual-phase glass ceramic material is 45SiO2-19Al2O3-12LiF-13LaF3-11Ga2O3-xTmF3-yCr2O3, x and y are the molar ratio of TmF3 and Cr2O3 respectively, the value range is 0.1~2.0 and 0.05~0.3 respectively;LaF3 nanocrystals and Ga2O3 nanocrystals are precipitated in the glass matrix and doped with Tm 3+ And Cr 3+ , Tm 3+ Selective into LaF3 nanocrystals, Cr 3+ Selective into Ga2O3 nanocrystals.The glass ceramic material makes two kinds of luminescent ions obtain respective efficient and relatively independent near-infrared luminescence response, and can be used for preparing near-infrared optical temperature measurement device, realizes independent dual-mode near-infrared temperature measurement with high sensitivity and self-calibration capability.

1. The name of the design product: optical temperature measuring device. 2. The use of the design product: used for accurate infrared temperature measurement of isometric crystal vacuum precision casting furnace. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention discloses a Dy method for optical temperature measurement. 3+ Doped Li3Ba2(PO3) 7 Luminescent material, its preparation method and uses, the general chemical formula of which is Li3Ba 2‑x (PO3)7:xDy 3+ The luminescent material has a crystal system of 0.01 ≤ x ≤ 0.33, belonging to the monoclinic crystal system with space group P21 / a. It uses Li3Ba2(PO3)7 as the matrix and rare earth dysprosium ions (Dy... 3+ Dy was prepared by mixing and grinding, pre-calcining, cooling and grinding again, synthesizing at high temperature, cooling and grinding again, with the ions being activated. 3+ Doped Li3Ba2(PO3) 7 Luminescent material. This material can produce cool white light when excited by 350 nm ultraviolet light; within a temperature range of 303–573 K, optical thermometry can be achieved based on the fluorescence intensity ratio of thermally coupled energy levels, with a relative sensitivity S0. R With absolute sensitivity S A All values ​​reached their maximum at 303 K, at 2.66% K. ‑1 and 0.69% K ‑1 Therefore, this material has potential applications in white light illumination and optical temperature measurement.

The invention discloses an optical temperature measurement material with high-sensitivity rare earth doped silicon nitride branched nanowires and a preparation method of the optical temperature measurement material, and belongs to the technical field of preparation and application of luminescent materials. The chemical formula is Si3N4: amol% of Ho < 3 + > and bmol% of Yb < 3 + >, a and b are doping concentrations, a is equal to 0.2-0.6, and b is equal to 0.4-1.2. A plasma direct-current arc discharge method is adopted for preparation, high-purity Si3N4, Yb2O3 powder and Ho2O3 powder (the purity is 99.99% or above) are taken as raw materials and are uniformly mixed after mass conversion according to a molar ratio, ions are uniformly doped in a high-temperature plasma environment, and branch nanowires are formed. The material can calculate two temperature sensing modes of temperature response based on energy level fluorescence intensity ratio (FIR) and decay life, has the advantages of simple preparation process and stable luminescence performance, and is expected to realize high-sensitivity and wide-temperature-range optical temperature measurement application.

The application provides a temperature measurement system and method based on fluorescence imaging and ratio in a microwave field, adopts a combined mode of fluorescence imaging and fluorescence spectrometry, and divides fluorescence emitted by a chemical reaction container into two paths by an integrating sphere module; first path emergent light enters a fluorescence imaging module, and temperature distribution on a surface of the container is directly reflected by fluorescence imaging; second path emergent light enters a fluorescence spectrometry temperature measurement module, and temperature on the surface of the container is measured according to a characteristic peak of a fluorescent body and a Boltzmann-thermal law. Non-contact optical temperature measurement with high performance is realized, and spatial resolution in a temperature measurement process in the microwave field is improved.

The application discloses an up-conversion luminescent material with reverse thermal quenching and thermal quenching, belongs to the field of rare earth luminescent materials, and has a chemical formula of NaEr 0.695 F4:Yb 0.2 / Gd 0.1 / Eu 0.005 The material morphology is a micron-level hexagonal disc, and the NaEr 0.695 F4:Yb 0.2 / Gd 0.1 / Eu 0.005 The up-conversion micro-particle is used as a dual-function up-conversion luminescent temperature sensor, and can be used for a sensitized sensor and a thermal quenching sensor, and can also be used for non-contact optical temperature measurement or high-sensitivity optical temperature measurement under extreme temperature conditions. Temperature detection is realized based on thermal coupling energy levels, the distance between two emission peaks is large, and data processing errors are greatly reduced; the up-conversion luminescent intensity of the energy level is enhanced with the increase of temperature, which is called reverse thermal quenching, and the temperature sensing performance is better. The application further discloses a preparation method of the material, and the method is simple to operate, the material has good crystal phase, uniform phase, high yield and stable performance, and has good dual-function temperature response effect.

The embodiment of the invention provides a one-dimensional lead-based hybrid perovskite luminescent material, a preparation method and application, and relates to the technical field of luminescent materials. The chemical formula of the one-dimensional lead-based hybrid perovskite luminescent material is ABX6, the A site is organic cations C7H18N < + > and C13H26N < + >, and the B site is organic cations C7H18N < + > and C13H26N < + >. The B site is metal ion Pb < 2 + >; x is halogen ion Br <-> or I <->. The one-dimensional lead-based hybrid perovskite luminescent material provided by the embodiment of the invention shows obvious and repeatable fluorescence lifetime temperature dependence in a low-temperature interval of 80-200 K, and the fluorescence lifetime has good response characteristic along with temperature change, so that high-precision optical temperature measurement can be realized based on the fluorescence lifetime.