21 results about "Radiation stability" patented technology

The invention relates to the technical field of microwave antennas, and discloses a broadband liquid crystal phased antenna array integrated by heterogeneous substrates. The heterogeneous substrate integrated broadband liquid crystal phased antenna array comprises a radiation structure, a liquid crystal phase shifter structure and a feed network structure. The radiation structure and the feed network are arranged on two sides of the metal floor in a layered manner, so that the problem that the radiation performance of the antenna is influenced by the radiation of the microstrip feed network is solved; the radiation structure adopts a double-layer structure to realize broadband radiation, energy transmission adopts a copper column direct connection mode, a metal floor wide gap etching process is omitted, and the radiation stability and reliability are improved; non-direct-connection energy transmission between the feed network and the phase shift line is realized by adopting small-sized flat plate coupling, waveguide feed is avoided, and the overall thickness of the antenna is reduced.

This invention discloses a method, product, and application for the separation of astatine-211 in an aqueous phase based on valence state regulation. The method includes: passing a solution of astatine-211 containing a strong oxidizing acid through a sulfur-containing solid support, causing specific adsorption of positively valence astatine-211; eluting with a water-soluble reducing agent to reduce astatine-211 to astatine anions, obtaining an aqueous astatine-211 eluent. The entire process is carried out in the aqueous phase, requiring no organic solvents and avoiding radionuclide volatilization loss due to heating and evaporation. This invention also provides an eluent composition obtained by this method, sodium astatide injection, astatine-211-labeled radiotargeting drugs and their preparation methods, as well as the application of this eluent composition in the preparation of drugs for treating NIS-positive diseases. This invention achieves highly selective separation and mild, rapid elution of astatine-211, and the product exhibits excellent biocompatibility and radiation stability, and can be used directly or after simple activation to prepare targeted α-therapy drugs.

The invention provides a protective glass and a reinforced protective glass with excellent irradiation stability. The protective glass comprises the following components in percentage by weight: 50.0 to 70.0 percent of SiO2; 3.0% to 30.0% of B2O3; 3.0 to 20.0 percent of Al2O3 (aluminum oxide); na2O: 3.0 to 20.0% of Na2O: 3.0 to 20.0%; 1.0 to 15.0 percent of K2O; 1.0 to 7.0 percent of CeO2; 0.1 to 5.0 percent of TeO2 (TeO2); and 0.5 to 10.0 percent of P2O5. Through reasonable component design, the obtained protective glass has excellent irradiation stability and is suitable for chemical strengthening, the strengthened protective glass prepared through chemical strengthening has excellent irradiation stability and high bending strength, space rays can be effectively protected, the thickness of the protective glass for space equipment can be reduced, and the service life of the protective glass is prolonged. And miniaturization and light weight of space equipment are realized.

The invention relates to a multi-target molecular ligand as well as a preparation method and application thereof. The multi-targeting molecular ligand disclosed by the invention aims at prostate cancer and bone metastasis thereof, and the ligand simultaneously contains a polypeptide chain Glu-urea-Lys (ACUPA) capable of being recognized by a prostate specific membrane antigen (PSMA), is used for targeting diphosphoric acid of hydroxyapatite nanocrystals in bones, and is also combined with an anisidine fragment which is specifically combined with a Sigma-1 receptor. The multi-target molecular ligand can efficiently mark radionuclide and has excellent radiation stability, cell and animal experiments prove that the multi-target molecular ligand can be efficiently taken by PSMA positive prostate cancer RM-1 cells, RM-1 subcutaneous tumor models and RM-1 tibial metastatic tumor models, and can be used for developing diagnosis and treatment of PSMA positive prostate cancer and bone metastasis thereof, and diagnosis and treatment integration is achieved.

The invention discloses a high-entropy rare earth cerate ceramic coating for shielding neutrons and X-rays and a preparation method of the high-entropy rare earth cerate ceramic coating, and belongs to the technical field of radiation protection materials. The general formula of the chemical composition of the coating is (Sm < 0.2 > Gd < 0.2 > Er < 0.2 > Tm < 0.2 > Yb < 0.2 >) 2Ce2O7, and the coating has an A2B2O7 type pyrochlore or defective fluorite structure. A site is formed by atomic-scale mixing of five rare earth elements including Sm, Gd, Er, Tm and Yb, the molar content of each element is 5%-35%, and neutron and X-ray shielding functions are synergistically exerted through high-entropy design; and B site is Ce element. The preparation method comprises the following steps: proportioning corresponding oxides in proportion, performing ball milling, performing high-temperature sintering to synthesize high-entropy ceramic powder, performing spray drying granulation, and performing deposition on the surface of a matrix treated by the NiCoCrAlY bonding layer by adopting an atmospheric plasma spraying technology to form the coating. Atomic-scale uniform distribution of multiple functional elements is achieved through high entropy, a shielding blind area of a traditional composite material is eliminated, and the coating has the advantages of efficient cooperative shielding, excellent anti-radiation stability and environment friendliness and is suitable for radiation protection in the fields of aerospace, nuclear energy, medical treatment and the like.

Disclosed herein are biodegradable polymer compositions including, based on the total weight of the polymer composition, between 0.1 wt.% and 40 wt.% aPHA and between 60 wt.% and 99.9 wt.% PLA. The composition may optionally include PHA in a weight, based on the total weight of the polymer composition, between 0.1 wt.% and 35 wt.% PHA. However, when both PHA and aPHA are in the composition, the total combined weight of the PHA and aPHA based on the total weight in the polymer composition is 40 wt.% or less. The compositions may have additives included in them, such as colorants, optical brighteners, or radiation stability agents, or combinations thereof. Articles formed from the polymer compositions disclosed herein have improved mechanical properties compared to an article formed from PLA alone.

The utility model belongs to the technical field of insulator core rod defect detection, and discloses an inner slotted ring patch antenna for insulator core rod defect detection, which comprises a dielectric substrate, a coplanar waveguide feed ground conductor is etched on the upper surface of the dielectric substrate, the coplanar waveguide feed ground conductor comprises an inner slotted ring patch arranged on the upper surface of the dielectric substrate, and the inner slotted ring patch is arranged on the lower surface of the dielectric substrate. The inner side edge of each inner slotted annular patch is provided with a slot, the coplanar waveguide feed ground conductor comprises a central conductor arranged on the upper surface of the dielectric substrate and rectangular ground conductors symmetrically distributed on the two sides of the central conductor, and the two rectangular ground conductors are connected with the outer edges of the two inner slotted annular patches respectively. According to the utility model, the arc-shaped coupling section extends into the inner side of the slotted ring, so that high-efficiency electromagnetic coupling is realized, and the working frequency band is widened; the rectangular ground conductor is connected with the outer edge of the inner slotted annular patch, the symmetry is improved, the radiation loss is reduced, the arrangement of the slots concentrates the surface current distribution, and the radiation stability is enhanced.

The invention provides a remote sensing giant satellite group absolute radiation reference unification method, equipment and a storage medium, which are used for establishing a ground absolute radiation reference and comprises the following steps: acquiring the surface reflectance and atmospheric parameters of a ground radiation calibration field through automatic observation equipment; constructing an on-satellite absolute radiation reference, namely selecting a plurality of satellites from a satellite group as calibration satellites based on satellite radiation stability, orbit distribution and redundant backup requirements, and carrying on-satellite calibration devices by the calibration satellites to obtain a traceable on-satellite reference; satellite-ground reference unification: respectively carrying out site calibration and on-satellite calibration on a calibration satellite, and carrying out weighted fusion on two calibration results based on calibration uncertainty to obtain an optimal absolute radiation coefficient; and inter-satellite reference transmission: transmitting the optimal absolute radiation coefficient to other satellites of the satellite group through one-to-many mode cross calibration, thereby realizing radiation reference unification of the whole satellite group. According to the invention, high-precision, high-stability and automatic absolute radiometric calibration of the remote sensing giant satellite group is realized.

The application discloses a millimeter-level thorium cluster compound single crystal, a synthesis method thereof and application of the millimeter-level thorium cluster compound single crystal in radiation detection and protection, and relates to the technical field of radiation detection and protection. The synthesis method comprises the following process: a hydrophilic thorium salt and 3-pyridine-4-yl-benzoic acid are subjected to a solvothermal reaction in a mixed solvent, and after the reaction is completed, a transparent block crystal is obtained; the transparent block crystal is washed and dried to obtain the millimeter-level thorium cluster compound single crystal; the mixed solvent comprises water, an inorganic acid and an organic solvent. The millimeter-level thorium cluster compound single crystal has the effects of radiation color change, good ray response selectivity, strong radiation stability, strong ray retardation capacity and high reusability. The thorium metal cluster compound single crystal material can be used for detecting X-ray cumulative radiation dose by using the above-mentioned properties, and simultaneously acts as a radiation shielding material to efficiently block ionizing radiation, thereby playing a role in radiation protection.

The application discloses a preparation method of high-thermal-conductivity tungsten-nickel-chromium sputtering target material for semiconductor equipment, and comprises the following steps of substrate selection: uniformly blending tungsten, nickel and chromium according to a weight ratio of 65:28:7 to prepare a substrate; adding 10-15% of the total amount of the substrate of nano additives and 2-5% of the total amount of the substrate of rare earth agents into the substrate, then uniformly mixing and sufficiently ball milling to obtain a ball milling body. The tungsten-nickel-chromium sputtering target material is prepared by using tungsten, nickel and chromium to form a substrate, and the nano additives and the rare earth agents are added at the same time, and the target material is prepared by sintering improvement, and the balance and coordination of dielectric property and thermal conductivity of the target material are modified, and the anti-radiation stability effect is remarkable.

The invention discloses an inorganic zinc-rich primer coating composition, a coating as well as a preparation method and application of the inorganic zinc-rich primer coating composition. The inorganic zinc-rich primer coating composition comprises a first component and a second component, the first component comprises zinc powder and basalt fibers, and the second component comprises ethyl polysilicate, polyvinyl butyral, ethanol, water, hydrochloric acid, a specified solvent and trimethyl borate. According to the inorganic zinc-rich primer coating composition provided by the invention, the basalt fiber and the polyvinyl butyral are introduced to modify a traditional inorganic zinc-rich coating, so that the compactness, the corrosion resistance, the thermal conductivity and the irradiation resistance of a coating are remarkably improved, the coating is free of cracking under the dry film thickness of 150 microns, the salt spray resistance exceeds 3500 hours, and the coating has a good application prospect. And the protective paint can effectively pass LOCA (loss of coolant accident) superposition test, shows excellent decontamination performance and radiation stability, and completely meets the technical requirements of national and No.1 nuclear power plants on the protective paint.

The application discloses a kind of dendritic organic scintillator materials based on thermal activation delayed fluorescence and preparation method and application thereof, the organic scintillator material has the ternary structure of " acceptor core-donor skeleton-peripheral heavy atom capture antenna ": with thermal activation delayed fluorescence (TADF) molecule as core light unit, peripheral connection multiple branched chain containing heavy halogen atom aromatic functional group as X-ray absorption enhancement layer, isolated between by saturated flexible chain, the dendritic structure not only significantly improves the X-ray absorption coefficient of material using heavy atom effect, also effectively inhibits fluorescence quenching caused by heavy atom and the exciton quenching caused by intermolecular accumulation by space steric effect, so that the organic scintillator material of the application has high X-ray sensitivity, excellent radiation stability and high luminous efficiency, is suitable for high-performance X-ray imaging and radiation detection field.

This application discloses a doped zinc germanate crystal, its preparation method, and its application. The molecular formula of the doped zinc germanate crystal is Zn. 2‑x GeO4:xMn, where Mn is divalent manganese with a valence of 0 ≤ x ≤ 0.5, is a series of crystals prepared as polycrystalline powders using a high-temperature solid-state method. Large crystals are grown using methods such as the Bridgman process, molten salt method, and Czochralski method, but not limited to these methods. This series of crystals exhibits steady-state luminescence characteristics, high light output, excellent radiation stability, and a low detection limit. Furthermore, due to the stable structure of the crystals, they can achieve long-term stable operation under X-ray irradiation. They can be used in many fields such as flawless inspection of electronic components, radiation imaging, and security inspection.

The application discloses a kind of based on artificial intelligence's remote sensing instrument radiation key component identification method and device.The method includes: obtaining the radiation calibration coefficient of each fitting order of the infrared remote sensing instrument to be identified, and obtaining the temperature of each optical path component in the infrared remote sensing instrument at the time when the radiation calibration coefficient is obtained;Respectively based on the radiation calibration coefficient of each fitting order and the temperature of each optical path component, training is carried out, and the artificial intelligence network corresponding to each fitting order is obtained;Respectively based on the artificial intelligence network corresponding to each fitting order, the rate of change of radiation calibration coefficient with the temperature of optical path component is obtained;Based on the rate of change of radiation calibration coefficient with the temperature of optical path component, key components in each optical path component are identified.The remote sensing instrument radiation key component identification method and device based on artificial intelligence disclosed in the application can accurately identify the radiation key point in the infrared remote sensing instrument by quantitatively analyzing the influence of different components on the radiation stability of the infrared remote sensing instrument.

The application relates to the technical field of high polymer materials, and discloses a flexible anti-radiation material, a preparation method and application thereof, the flexible anti-radiation material comprising an anti-radiation polymer layer and an anti-radiation particle layer arranged on the anti-radiation polymer layer; components of the anti-radiation particle layer include anti-radiation glass particles and a binder; components of the anti-radiation polymer layer include silicone rubber and nano AZO powder; the anti-radiation glass particles are composed of the following components in mass percentage: SiO 2 70%~83%、B2O3 3%~8%、Li2O 2.5%~7%、CeO2 2%~7%、WO3 1%~3%、MoO3 1%~2%、Bi2O3 1.6%~3.3%。Through the technical scheme, the problem that the anti-radiation property and the anti-radiation stability of the anti-radiation material in the prior art are poor is solved.

The application provides a nuclear detection device and an imaging device which can output light signals and have built-in gain, and mainly solves the technical problem that the existing imaging devices mostly use scintillator materials to convert radiation into light through the characteristics of the scintillator materials; however, the scintillator materials have the defects of low energy resolution, narrow linear range, and poor radiation resistance stability, thereby leading to poor imaging effect of the imaging device. The application comprises a bipolar transistor nuclear detector for converting radiation energy into electric energy and generating electric gain, and an LED light emitter for converting electric energy into light signals; the bipolar transistor nuclear detector comprises a collector, a base, an emitter, and a bottom electrode; the LED light emitter comprises an electron transport layer, an active light-emitting layer, a hole transport layer, a hole injection layer, and a top electrode which are connected in sequence; and the side of the electron transport layer, which is far away from the active light-emitting layer, is connected with the collector.

This invention discloses the preparation of a MOFs-based multifunctional three-dimensional network nanocomposite fiber membrane material and its application in the removal of radioactive iodine aerosols. The method includes: dissolving at least two polymers in an organic solvent, then adding MOFs powder and stirring to form a precursor solution; electrospinning the precursor solution to obtain the MOFs-based multifunctional three-dimensional network nanocomposite fiber membrane material. This invention provides new ideas for the design and synthesis of electrospun fiber membranes and for the deep purification of iodine aerosols. Furthermore, compared with other fiber membrane materials, this fiber membrane material exhibits good radiation stability, high adsorption capacity, and excellent filtration efficiency. It has potential applications in the field of nuclear fuel reprocessing technology, including the adsorption of radioactive iodine gas and methyl iodine, as well as the filtration of radioactive aerosols.

The invention belongs to the technical field of functional material and radioactive waste treatment, and relates to an anti-radiation gas phase iodine adsorption aerogel and a preparation method thereof. The method is based on a freezing gel technology and comprises the following steps: firstly, inducing a prepolymerization solution to generate ice crystals at low temperature, then adding a redox initiator, forming a macromolecular chain through free radical polymerization reaction, and constructing a high-density chemically-crosslinked three-dimensional network gel skeleton under the action of a crosslinking agent. And melting ice crystals at normal temperature to obtain the porous gel matrix with a through ultra-large pore channel structure. Further grafting an amino-rich active molecular chain to the gel skeleton through surface modification, and drying at room temperature to obtain the radioactive iodine adsorption aerogel. The material can realize high-speed and high-capacity adsorption of gaseous iodine by virtue of through macroporous channels and high-density amino active sites; meanwhile, the material is endowed with excellent radiation stability due to the high cross-linking structure of the gel matrix. The method is simple and convenient in process, low in cost and good in expandability.

The invention provides a preparation method of a deuterium-doped and carrier gas synergistic anti-radiation optical fiber, the optical fiber and application, and belongs to the technical field of anti-radiation optical fibers, the preparation method comprises the following steps: firstly, preparing an optical fiber preform with a fiber core doped with rare earth ions and OD groups by adopting an improved chemical vapor deposition and solution doping combined technology; drawing the optical fiber preform to prepare a double-cladding rare earth ion doped optical fiber; and finally carrying out carrier gas treatment on the double-clad rare earth ion doped optical fiber, the carrier gas being at least one of deuterium gas, hydrogen gas or oxygen gas, and obtaining the anti-radiation optical fiber. Through the synergistic effect of introduced OD groups and loaded gas molecules, the anti-radiation stability of the prepared anti-radiation optical fiber is jointly enhanced, after the finally prepared anti-radiation optical fiber is irradiated by gamma rays with the total dose of 200Gy (Si), the laser slope efficiency change at the 1080nm wave band is less than 5%, the radiation darkening effect is thoroughly inhibited, and the anti-radiation stability of the prepared anti-radiation optical fiber is improved. The problem that in the prior art, the anti-radiation performance is insufficient or cannot be maintained for a long time is solved.

This invention provides a method, device, and storage medium for unifying the absolute radiometric reference of a remote sensing mega-satellite cluster. The method includes establishing a ground-based absolute radiometric reference, which involves acquiring the surface reflectance and atmospheric parameters of the ground radiometric calibration field using automated observation equipment; constructing an on-board absolute radiometric reference, which involves selecting several satellites in the cluster as calibration satellites based on satellite radiometric stability, orbital distribution, and redundancy requirements. These calibration satellites carry on-board calibration devices to obtain a traceable on-board reference; unifying the satellite-ground reference, which involves performing both site calibration and on-board calibration on the calibration satellites, and weighted fusion of the two calibration results based on calibration uncertainty to obtain the optimal absolute radiometric coefficient; and transferring the reference between satellites, which involves transferring the optimal absolute radiometric coefficient to other satellites in the cluster through a one-to-many cross-calibration process, achieving unification of the radiometric reference across the entire cluster. This invention achieves high-precision, high-stability, and automated absolute radiometric calibration for remote sensing mega-satellite clusters.

The invention relates to a C-MET targeting peptide, a polypeptide containing the C-MET targeting peptide, a molecular probe, a conjugate and application of the C-MET targeting peptide. The C-MET targeting peptide provided by the invention has an amino acid sequence as shown in SEQ ID No.: 1. The invention further provides a molecular probe formed by connecting the C-MET targeting peptide and a nuclide chelating group through a linker. The polypeptide molecule provided by the invention can realize targeted specific binding with C-MET receptor protein, is easy to synthesize, convenient to prepare and simple to mark, and is beneficial to clinical application. In-vitro experiments prove that the polypeptide molecule has the advantages of high affinity, good radiation stability and good water solubility. Moreover, the radionuclide-labeled molecular probe constructed by the invention is mainly subjected to kidney metabolism, the diagnosis result shows excellent tumor background signal-to-noise ratio, tumor / liver uptake ratio and high tumor uptake value, and the radionuclide-labeled molecular probe is expected to be widely applied to C-MET imaging diagnosis and related nuclide therapy.