247 results about "Solid phase reactions" patented technology

The invention belongs to the technical field of batteries, and relates to an organic-inorganic compound halide solid electrolyte material, a preparation method thereof and a battery, the structural general formula of the solid electrolyte is (DaZc) m (at) (BdWe) n, D represents at least one of Sc, In, Y, Hf, Zr, Ta, Nb, Al, Mo, Ti, V, Ga, Sb, Cd, La, Ce, Pr, Sm, Nd, U, Eu, Er, Ho, Dm, Yb, Lu and Gy; z represents at least one of F, Cl, Br, I, O and S; b represents at least one of Li, Na, Ag, Cu, Cs, K, Mg and Ca; w is an organic acid ion. DaZc and BdWe are mixed in a water-free and oxygen-free environment, a solid-phase reaction is carried out, and the halide solid electrolyte is obtained. The halide solid-state electrolyte material provided by the invention can be simultaneously matched with an oxide positive electrode and a lithium metal negative electrode, is beneficial to solving the technical problem of poor matching property of an existing electrolyte material and the lithium metal negative electrode, and improves the energy density and the cycling stability of a solid-state battery.

The invention relates to the technical field of soft magnetic ferrite materials, in particular to a preparation method of a high-permeability soft magnetic ferrite core material, which comprises the following steps: firstly, preparing FeSiCrBCu soft magnetic alloy powder with uniform components and controllable particle size through a single-roller quenching and hydrogen decrepitation process, and laying a structural foundation for excellent magnetic performance; and then a mechanical stirring-ultrasonic synergistic coating technology is utilized, so that the ferrite precursor uniformly coats the alloy powder, an effective core-shell structure is formed, and solid-phase reaction and crystal grain uniform growth during sintering are promoted. Besides, a multi-task deep learning model (MTL-DL) based on transfer learning is adopted to carry out multi-objective collaborative optimization on the sintering process, accurately match and dynamically adjust key parameters, and accurately regulate and control the material densification process, the grain size and the phase distribution on the microcosmic level, so that the problem that the microstructure and component uniformity are difficult to accurately control in the prior art is solved; therefore, the problems of poor material performance and high power loss are solved.

The invention relates to a method for semi-solid-phase synthesis of a polycyclic compound and an intermediate, a long chain is synthesized through solid phase, then two-step ring closing is performed to form a key intermediate, and simple derivation is performed on the basis of the key intermediate to obtain a PCSK9 antagonist compound. According to the invention, starting materials for solid-phase synthesis are selected, steric hindrance is effectively avoided, and solid-phase reaction and subsequent liquid-phase correlation cyclization can be smoothly carried out, so that the yield is improved, and the cost is reduced.

This invention discloses a high-entropy transition metal nitride ceramic material and its preparation method. The preparation method includes the following steps: mixing n kinds of transition metal nitride powders and m kinds of transition metal powders, vacuum drying to obtain a precursor; placing the precursor in a mold and performing pre-pressing treatment to obtain a pre-pressed sample; sintering the pre-pressed sample in a sealed environment at a temperature of 500–3500℃ and a pressure of 2–28 GPa to obtain the high-entropy transition metal nitride ceramic material; wherein n≥1, m≥0, and the total number of transition metal elements in the precursor is four or more. This invention improves the stability of the precursor and reduces the size and distance of particles within the precursor through two pressure treatments, achieving for the first time the synthesis of high-density, high-purity high-entropy transition metal nitride ceramic materials via solid-state reaction.

The invention discloses a SbBr co-doped argyrodite type solid electrolyte and a preparation method thereof.The preparation method comprises the steps that Li2S, LiCl, P2S5 and SbBr3 are weighed according to the stoichiometric ratio and then subjected to ball milling treatment, and mixed powder is obtained; the mixed powder obtained in the step S1 is subjected to compression molding and placed in a muffle furnace to be heated and calcined, and a solid-phase reaction is conducted; and after the reaction is finished, naturally cooling to room temperature, and grinding to obtain the SbBr co-doped argyrodite type solid electrolyte. According to the preparation process of the argyrodite type solid electrolyte, a traditional solid-phase sintering process is adopted, the synthesis process is simple, and the repeatability is high. The ionic conductivity of the argyrodite type solid electrolyte prepared by the process can reach 10.4 mScm <-1 > at room temperature. The argyrodite type solid electrolyte prepared by the invention has high ionic conductivity and excellent air stability, and meets the requirements of industrial large-scale production. When the solid-state electrolyte provided by the invention is assembled into an all-solid-state battery, the cycle life of the all-solid-state battery can be remarkably prolonged due to good compatibility with lithium metal.

The invention discloses a method for preparing YAG transparent ceramic by two-step sintering, which comprises the following steps: 1) weighing yttrium oxide powder and aluminum oxide powder according to a stoichiometric ratio, mixing, and carrying out solid-phase reaction to synthesize YAG powder; 2) performing dry grinding and wet grinding on the obtained YAG powder to obtain mixed slurry; 3) drying the obtained mixed slurry to obtain powder, and performing compression molding and cold isostatic pressing to obtain a ceramic biscuit; and 4) pre-sintering the obtained ceramic biscuit in an oxygen-containing atmosphere, embedding the pre-sintered ceramic with oxide particles, and carrying out hot isostatic pressing sintering to prepare the YAG transparent ceramic. On the basis of obtaining the YAG transparent ceramic with high optical quality, a microstructure with a fine grain size can be obtained, and good mechanical properties are considered; the preparation method is simple, the equipment cost and energy consumption are low, the traditional annealing step can be omitted, and a new thought can be provided for preparation of the high-performance YAG transparent ceramic.

The invention relates to an ultra-pure calcium fluoride crystal raw material and a preparation method thereof. The preparation method of the hyperpure calcium fluoride CaF2 crystal raw material comprises the following steps: (1) respectively weighing a calcium source and a fluorine source according to the stoichiometric ratio of elements in CaF2, and carrying out vacuum drying to remove adsorbed water and bound water so as to obtain a dehydrated calcium source and a dehydrated fluorine source; (2) mixing the dehydrated calcium source, the dehydrated fluorine source and absolute ethyl alcohol, and carrying out ball milling to obtain a white pasty mixed raw material; and (3) carrying out vacuum high-temperature heat treatment on the white pasty mixed raw material, carrying out solid-phase reaction on calcium ions and fluorine ions to generate calcium fluoride, cooling after the reaction is finished to obtain white powder, and grinding and crushing to obtain the ultra-pure calcium fluoride crystal raw material.

The invention relates to the technical field of electrodes for vanadium batteries, in particular to a preparation method of a catalytically active electrode for a vanadium battery, the catalytically active electrode and application of the catalytically active electrode. The preparation method comprises the following steps: loading a bismuth oxide water-phase dispersion liquid as a precursor on the surface of a graphite felt electrode substrate, placing the graphite felt electrode in an inert atmosphere to carry out a carbon thermal reduction reaction, and carrying out a solid-phase reaction on bismuth oxide and the graphite felt carbon substrate in the inert atmosphere to generate a strongly combined catalytic active site in situ. By pertinently controlling the concentration of the bismuth oxide water-phase dispersion liquid and the temperature of the carbon thermal reduction reaction, active components in the prepared catalytic active electrode for the vanadium battery are uniformly and firmly combined on the surface of a matrix, and high uniformity and high stability are shown. And meanwhile, a loading-first and one-step carbon thermal reduction method is adopted, so that large-scale production can be realized, the electrochemical activity of the product is effectively improved, the uniformity and consistency of the performance can be realized, and the multi-dimensional strict requirements of commercial production on the electrode performance and the manufacturing efficiency are effectively met.

Processes for the production of powder materials are provided, and the resulting powder materials and electrodes are also provided.The processes include providing a starting powder with starting particles, each containing an electroactive material; coating the starting particles with a dopant compound containing a dopant material to define coated particles of an intermediate powder; exposing the coated particles to a reducing agent containing fluorine; and performing a heat treatment on the coated particles while exposed to the reducing agent at an elevated temperature and for a period of time sufficient to cause a solid-state reaction and diffusion of the dopant material into the electroactive material to form a doped region within the electroactive material and thereby define doped particles of a final powder material.The doped area extends at least one nanometer into the electroactive material, and the fluorine reacts with oxides that are formed on the surfaces of the coated particles.

The application relates to a preparation method of high-intermediate low-loss garnet ferrite with high bismuth substitution, and belongs to the field of microwave ferrite materials. 3+ The application reduces the volatilization of Bi by adding a small amount of H3BO3 and Bi2O3 as additives in the two-milling process, accelerates the growth of the crystal under the driving of the low-melting-point Bi2O3 additive in the sintering process, and accelerates the growth of the crystal under the driving of the low-melting-point Bi2O3 additive in the sintering process. 3+ The volatilization of Bi in the pre-sintering process is reduced by using a lower pre-sintering temperature, the optimal sintering temperature is wider, and the microstructure of the material is effectively improved. 3+ The volatilization of Bi in the sintering process is compensated by using a three-stage progressive holding sintering method in the high-temperature section of the final sintering, the sintering temperature and the holding time are controlled, the crystal grain growth is reduced after the continuous growth of the crystal grain, and the uniformity of the solid-phase reaction is improved.

The invention discloses a preparation method of FePS3, which comprises the following steps: mechanically mixing pyrite powder, sulfur-containing small molecules and elemental phosphorus, calcining the fully mixed powder in two temperature stages under a protective atmosphere, and cooling to obtain FePS3 nano-powder; wherein in the first temperature stage, the temperature is 200-300 DEG C, and the heat preservation time is 120-240 minutes, and in the second temperature stage, the temperature is 400-600 DEG C, and the heat preservation time is 120-180 minutes; the sulfur-containing small molecules are thiourea, thioacetamide or a mixture of the thiourea and the thioacetamide; the molar ratio of sulfur atoms to phosphorus atoms in FeS2 molecules and sulfur-containing small molecules in the pyrite powder is (1: 3: 5)-(1: 1: 5). According to the method, pyrite is used as an iron source and a sulfur source, sulfur-containing small molecules are used as a second sulfur source, and the FePS3 nano-powder is directly obtained through solid-phase reaction with the simple substance phosphorus without additional purification treatment. The method is low in solid-phase reaction temperature and simple in process, does not need harsh reaction conditions, and is easy for large-scale production.

A method for limiting void formation in a melt-infiltrated ceramic matrix composite (MI-CMC) component includes arranging one or more infiltrant feedstocks in fluid communication with a targeted area of the MI-CMC component. The one or more infiltrant feedstocks have a nominal melting point at or below a nominal melting point of an alloy within the MI-CMC component. The method includes heating the one or more infiltrant feedstocks to a first temperature at or above the nominal melting point of the one or more infiltrant feedstocks to form a molten phase. The method also includes infiltrating the targeted area of the MI-CMC component with the molten phase. As such, the molten phase reacts with a solid phase in the targeted area of the MI-CMC component. Further, the method includes cooling the MI-CMC component to a second temperature that is below the first temperature to solidify the molten phase.

The application relates to a dual-phase high-entropy ceramic material for high-temperature thermal barrier coatings and a preparation method thereof, in particular to a dual-phase high-entropy ceramic (La 0.2 Nd 0.2 Gd 0.2 Y 0.2 Ho 0.2 )2Zr2O7 with low thermal conductivity and high thermal expansion coefficient, which is mainly used for thermal isolation, thermal barrier coatings and other applications in high-temperature environments. The application is prepared by adopting a solid-phase reaction sintering process through accurate design of the combination of rare earth elements, forms a stable dual-phase structure, effectively inhibits grain growth through grain boundary pinning, and thus maintains a nanoscale grain structure. Meanwhile, the material can efficiently block heat transfer at high temperatures through optimization of phase proportion, and the thermal expansion characteristics are matched with a metal base layer, effectively avoiding the falling risk caused by the difference in thermal expansion of the two, and thus greatly improving the service life and reliability of the material in a high-temperature environment. The high-entropy ceramic material of the application can be widely applied to fields with high demand for high-temperature thermal isolation in aerospace, aviation, automobile industry and the like, is especially suitable for thermal barrier coatings, high-temperature thermal insulation materials and other high-temperature thermal insulation applications, and has important engineering application value.

The invention provides a hydrogen interstitial doped strontium titanate material and a preparation method thereof, the hydrogen interstitial doped strontium titanate material is prepared by doping a hydrogen element into a strontium titanate single crystal through a solid-phase reaction, and the hydrogen element is introduced into a strontium titanate lattice interstitial site by using sodium borohydride as a hydrogen source. According to the hydrogen gap doped strontium titanate material disclosed by the invention, the carrier concentration is obviously increased, the absorption of the material in a range from visible light to infrared light is enhanced by doping, and the photon utilization rate is improved. Compared with heavy metal displacement doping and hydrogen ion gap doping, the carrier mobility is not damaged, environmental protection is easy, the cost is low, doping conditions are not harsh, and large-scale industrial production is easy.

The invention relates to the technical field of molecular sieve synthesis and solid waste recycling, and particularly discloses a method for preparing an ITH type molecular sieve from silica gel waste through a ball-milling solid-phase crystallization method. The method comprises the following steps: mixing waste silica gel as a main silicon source with an aluminum source, an alkali source, an organic template agent and deionized water, directly carrying out mechanochemical activation and solid-phase reaction through high-energy ball milling without conventional hydrothermal crystallization, and then carrying out solid-phase crystallization at a relatively low temperature to finally obtain the ITH type molecular sieve with good crystallinity. According to the method, a ball-milling solid-phase crystallization method is applied to synthesis of the ITH type molecular sieve for the first time, and full-amount and high-value utilization of the silica gel waste is successfully realized. The method has the remarkable advantages of short process flow, no need of a large amount of solvent, low energy consumption, low cost and environmental friendliness, and opens up a new path for industrial low-cost preparation of the ITH type molecular sieve and green recovery of silica gel waste.

The application discloses a preparation method and system of sodium difluorophosphate. The preparation method of sodium difluorophosphate comprises the following steps: S100, in a water-free or low-water environment, a solid-phase reaction is generated between diphosphorus pentoxide and ammonium fluoride to obtain an ammonium difluorophosphate intermediate, and volatile substances generated in the reaction process are removed and recovered; S200, in a water-free organic solvent, the ammonium difluorophosphate intermediate obtained in the step S100 is reacted with a sodium salt to obtain sodium difluorophosphate. The preparation method of sodium difluorophosphate provided by the application uses diphosphorus pentoxide and ammonium fluoride as reaction raw materials to obtain an ammonium difluorophosphate intermediate, and then reacts to obtain sodium difluorophosphate. The obtained sodium difluorophosphate has high purity and few impurities. The preparation method of sodium difluorophosphate has the advantages of cheap and easily obtained raw materials, stable chemical properties, few by-products generated in the reaction, and easy recovery, and is a green and safe preparation method of sodium difluorophosphate.

The present invention relates to a low-dielectric and low-loss magnesium silicate system microwave dielectric ceramic and a low-temperature preparation method thereof. The present invention uses Mg2SiO4 ceramic as a matrix and adopts Mg 2+ Mg was synthesized by the conventional solid phase reaction method using non-stoichiometric modification, CaTiO3 to adjust the temperature stability and LiF to reduce the sintering temperature. 2.1 SiO 4.1 ‑xCaTiO3‑yLiF multiphase composite microwave dielectric ceramics, wherein x=0.09~0.13,y=0.05~0.25. The multiphase composite makes the prepared Mg 2.1 SiO 4.1 ‑xCaTiO3‑yLiF has a low dielectric constant, low dielectric loss, and a near-zero resonant frequency temperature coefficient, and reduces the sintering temperature of ceramic samples. This invention could provide an alternative material for the preparation of high-frequency communication components using LTCC technology, and has broad application prospects.

The invention relates to a method in the technical field of inorganic materials, in particular to a method for preparing metal element doped hydroxyapatite through a high-temperature solid-phase method, a product prepared through the method and application of the product. Through two steps of high-temperature solid-phase reaction, metal-doped beta-tricalcium phosphate (beta-TCP) is synthesized in advance to serve as a reaction precursor, the metal-doped beta-tricalcium phosphate and calcium carbonate are subjected to solid-phase reaction at high temperature to generate metal-doped hydroxyapatite, the distribution uniformity of doped elements in a final hydroxyapatite product is guaranteed, and by controlling the temperature and time, the metal-doped hydroxyapatite is prepared. Generation of impure phases can be effectively inhibited, and doped hydroxyapatite with single phase composition is obtained. The method is simple in process, free of solvent and high in yield, metal ions with different functions can be flexibly introduced, directional regulation and control of functionality such as biological activity, mechanical property and antibacterial property of a final hydroxyapatite material are achieved, and a new way with great industrialization prospects is provided for large-scale and low-cost preparation of high-performance doped hydroxyapatite.

The invention discloses a process for dealkalizing and deeply reducing red mud through gradient temperature control treatment, which comprises the following steps: 1) accurately metering raw materials and grinding; 2) feeding the ground raw materials into a red mud stirrer, and stirring at a gradient rotating speed; 3) feeding the stirred and mixed raw materials into a granulator for granulation, and pressing the materials into particle materials with the particle size of 5-15mm; 4) feeding the particle material into a dealkalization solid-phase reaction device, and forming a particle material after a solid-phase reaction in a reducing atmosphere; (5) feeding the particle material after the solid-phase reaction into a cooling machine, and slowly cooling in a furnace by adopting a nitrogen direct circulating cooling method; 6) crushing the cooled material by a crusher until the particle size is less than 5mm; 7) performing magnetic separation on the ground powder by a high-gradient magnetic separator.According to the method, efficient dealkalization and iron element reduction separation are realized through high-temperature dealkalization pre-reduction and high-temperature deep reduction melt separation.

The invention discloses a method and a device for full-automatic rapid granulation and dry pressing forming, and belongs to the technical field of powder pressing forming. Granulating the powder through electromagnetic vibration, and transferring the granulated powder to full-automatic dry-pressing molding equipment by using a mechanical arm for dry-pressing molding to obtain a green body with a designed shape; according to the invention, rapid full-automatic forming of multi-batch powder of small samples can be realized, technical support is provided for high-throughput all-solid-phase reaction experiment preparation, efficient and rapid design development or screening of materials is promoted, and meanwhile, a new way is provided for preparation of high-performance materials.

The application discloses a kind of low-grade lepidolite efficient clean lithium extraction methods, comprising the following steps: S1: lithium mica ore is mixed with sodium potassium sulfate, calcium sulfate, calcium hydroxide, lime, quartz uniformly, then mixed raw material is pressed into brick billet;S2, the brick billet is stacked, preheating drying, high-temperature calcination, cooling, crushing, powder after grinding to obtain fine powder clinker;S3: the fine powder clinker is immersed with water liquid, then through solid-liquid separation to obtain leaching solution;The application can accelerate the solid-phase reconstruction reaction of lepidolite by using sodium sulfate potassium salt, thereby improving the conversion rate of lithium;On the other hand, by adding quartz, the free energy of the solid-phase reaction between lepidolite and sulfate can be effectively reduced, so that low-grade lepidolite can also have a good transformation rate;Adding lime and calcium hydroxide is significantly better than adding calcium carbonate, not only can effectively absorb the HF gas generated in the reaction, but also can avoid the reduction of lithium leaching due to the combination of fluorine and lithium, which is beneficial to improve the leaching rate of lithium.

The invention provides an iron-based polyanion composite material, which comprises a doped iron-based polyanion material and a polyacrylonitrile coating layer coated on the surface of the doped iron-based polyanion material, the chemical general formula of the doped iron-based polyanion material is Na < 2 + 2x + y > Fe < 2-x > (SO4) < 3-y > (PO4) < y >, 0 < = x < = 0.5, 0lt; and y < = 0.5. Through a dual modification strategy of SO4-site PO4 doping and surface polyacrylonitrile coating, the electronic conductivity, sodium ion transmission kinetics and interface stability of the material are remarkably improved. The invention further provides a method for preparing the composite material, a precursor and chain polyacrylonitrile are mixed and then subjected to a solid-phase reaction in an inert atmosphere, and Na < 2 + 2x + y > Fe < 2-x > (SO4) < 3-y > (PO4) < y > crystal generation and polyacrylonitrile cyclization are achieved at the same time through a one-step method. The composite material has high capacity and long cycle life, and is especially suitable for a sodium ion battery of a large-scale energy storage system.

The invention discloses an in-layer ordered nano layered structure ceramic prepared by a leap-type all-solid-phase reaction and a preparation method thereof, and the preparation method comprises the following steps: mixing commercially purchased Ti2AlC powder and MC (M = Ti, Ta, W) powder according to a standard molar ratio of 1: 1, carrying out ball milling after mixing, and then sintering by adopting a spark plasma sintering furnace to obtain the in-layer ordered nano layered structure ceramic. And after the sintering temperature rises to the set temperature of 1100-1600 DEG C, furnace cooling is carried out, a surface carbonization layer is removed, and the sample Ti2MAlC2 (M = Ti, Ta and W) is obtained. The prepared Ti2MAlC2 (M = Ti, Ta, W) is in-layer ordered nanometer layered structure ceramic, and belongs to 312 phases in MAX phase ceramic. According to the method, the difficulty of multi-component synthesis is remarkably reduced, and a new normal form is developed for MAX phase doping research.

The invention discloses a low-loss high-tunability BZT laminated dielectric film and a preparation method thereof, the laminated film comprises a substrate, a BZT film layer and a zinc niobate-based microwave dielectric ceramic film layer, and the chemical general formula of the zinc niobate film layer is Zn [(Ge0. 5Mo0. 5) xNb1-x] 2O6. A ceramic target material is synthesized by adopting a solid-phase reaction method, and thin film layers are sequentially deposited through a magnetron sputtering technology to construct a heterostructure. The high dielectric constant of BZT and the low loss characteristic of zinc niobate are combined, the frequency characteristic is remarkably improved, the dielectric loss is effectively reduced while the high tunability is kept, and the high-quality FOM is obtained and reaches 36.77. The film is excellent in performance and controllable in process, and has important application value in microwave communication devices such as tunable filters and phased array radars.

The invention provides a crack-free lithium niobate film based on a Si substrate and a growth method and application thereof, and belongs to the field of ferroelectric film growth methods. According to the crack-free lithium niobate thin film based on the Si substrate, the substrate is selected from a Si substrate, and a target material is selected from congruent lithium niobate ceramic doped with 2.0 mol%-5.0 mol% of erbium and congruent lithium niobate ceramic doped with 5.0 mol% of iron prepared by a solid-phase reaction method, or is selected from congruent lithium niobate crystal doped with 2.0 mol% of erbium and congruent lithium niobate crystal doped with 5.0 mol% of iron prepared by a Czochralski method, or is selected from congruent lithium niobate crystal doped with 5.0 mol% of erbium and congruent lithium niobate crystal doped with 5.0 mol% of iron prepared by a Czochralski method. The lithium niobate thin film shows a lithium niobate (006) characteristic diffraction peak and a lithium-deficient phase LiNb3O8 (-602) characteristic diffraction peak, the surface of the lithium niobate thin film is flat, smooth and crack-free, the problem of surface cracking of a Si-based lithium niobate thin film for a long time is solved, and the lithium niobate thin film can be used for preparing micro-cavities, electro-optical modulators, photoelectric detectors, super-surface micro-nano devices and the like and has wide application prospects. And a foundation is laid for manufacturing and researching an integrated device on a lithium niobate film sheet.

The invention provides a broadband high-reflection metal ceramic layered composite material and a preparation method and application thereof.A compact ceramic matrix BaLa2Ti3-xHfxO10 is prepared through a solid-phase reaction, x is larger than 0 and smaller than 0.9, Ti < 4 + > is equivalently replaced with Hf < 4 + > to regulate oxygen vacancies and defect energy levels in crystals, intrinsic / impurity absorption is reduced, and the visible near-infrared reflection performance is improved. And then a metal layer is constructed on the ceramic substrate through magnetron sputtering, and the layered composite material is formed. The average reflectivity of the composite material is 77% at the wave band of 0.5-2.5 microns, and the average reflectivity of the composite material is 70% at the wave band of 2.5-20 microns; and the metal layer provides free carrier retroreflection and crack bridging effects, so that the thermal shock resistance and the cracking resistance are remarkably improved, and light-heat-force collaborative optimization is realized. According to the invention, ultra-wideband high reflection and high-temperature mechanical reliability are both considered, and the material is suitable for scenes such as light path reflectors, laser protection, radiation reflection heat insulation protection and infrared stealth.

The invention discloses a perovskite anode catalyst layer material and a preparation method thereof, and belongs to the technical field of ceramic fuel cells. The perovskite anode catalyst layer material is prepared by adopting a plasma-assisted ball milling method, the molecular formula of the perovskite anode catalyst layer material is Sr < 2-x > Fe < 1.5-y > Ru < y > Mo < 0.5 > O < 6-delta >, x is equal to 0.05-0.10, y is equal to 0.05-0.15, and delta is equal to 0.10-0.35. A-site defect and B-site doping are designed on the basis of Sr2Fe1. 5Mo0. 5O6-delta perovskite, and performance breakthrough of the direct ammonia proton ceramic fuel cell at medium and low temperatures is achieved through the synergistic effect. Under the synergistic effect of argon plasma and mechanical force, nano-scale crushing and atomic-scale uniform mixing of raw materials are achieved, a large number of defects and active sites are generated on the surface of powder, subsequent solid-phase reaction activation energy is remarkably reduced, volatilization loss of ruthenium and molybdenum elements at high temperature is inhibited, and stoichiometric accuracy and structural uniformity of a final product are guaranteed.

The application discloses a preparation method for improving stability of a proton conductor electrolyte in carbon dioxide, relates to the technical field of solid oxide batteries and solid oxide electrolysis cells, and is characterized by the following steps: through a nano-additive surface modification method, a nano-structure additive of an alkaline earth metal oxide, or a transition metal oxide, or a VA main group metal oxide is prepared on the surface of a barium cerate and a barium zirconate series electrolyte obtained through a solid phase reaction method by using a vacuum impregnation method, and an alkaline proton conductor electrolyte with a surface modification additive is obtained. The alkaline proton conductor electrolyte with the surface modification nano-structure additive obtained by the application can be applied to a proton type carbon hydrogen ceramic membrane fuel cell or high-temperature electrolysis carbon dioxide, so that the stability of the electrolyte can be effectively enhanced, and ohmic loss can be reduced, thereby greatly improving the performance and stability of the solid oxide fuel cell and the electrolysis cell under a carbon dioxide atmosphere.

The application belongs to the technical field of thermoelectric device preparation and connectors, and aims to solve the problem of Te 0.985 Sb 0.015 During the connection of thermoelectric materials and Ni electrodes, a large number of aggregated pores and segregation of doped elements Sb are generated at the interface, which seriously weakens the electrical transport performance and thermal stability at the interface. A method for improving the performance and thermal stability of Te-based thermoelectric arms by using topological dense packing is provided. A topological dense packing NiTe 2‑x , 0≤ x ≤0.9 is synthesized by a solid phase reaction method, which is introduced into the Ni and Te 0.985 Sb 0.015 between them to form a Ni / NiTe 2‑x / Te 0.985 Sb 0.015 / NiTe 2‑x / Ni gradient connection structure. The problem of a large number of aggregated pores and segregation of doped elements Sb due to the severe diffusion of Ni into Te 0.985 Sb 0.015 and reaction at the interface is successfully eliminated, and the performance and service life of the thermoelectric connector are improved.

The invention provides a method for solid-phase synthesis of a dipeptide side chain of semeglutide. Specifically, the method comprises the following steps: 1) in an alkaline environment, grafting Fmoc-Aib-OH to 2-CTC resin through a solid-phase reaction to obtain Fmoc-Aib-resin; (2) removing an Fmoc protecting group of the Fmoc-Aib-resin, so as to obtain Aib-resin; 3) in the presence of a condensation reagent, carrying out a coupling reaction on the Aib-resin and R-His (R ')-OH to obtain R-His (R')-Aib-resin; 4) in the presence of a cracking reagent, removing the resin from the R-His (R ')-Aib-resin to obtain R-His (R')-Aib-OH; 5) reacting the R-His (R ')-Aib-OH with the HR ''to obtain the semeglutide dipeptide side chain R-His (R')-Aib-R. The preparation method is simple to operate and easy to amplify production, and the semeglutide dipeptide side chain prepared according to the preparation method can meet the requirements of different semeglutide synthesis processes and is wide in market application.