40 results about "Trioxide" patented technology

The invention provides spherical cobaltosic oxide as well as a preparation method and application thereof, the preparation method comprises the following steps: (1) injecting a cobalt salt-containing solution and a carbonate solution into a base solution in a parallel flow manner for a coprecipitation reaction to obtain a mixed-phase precursor; and (2) calcining the mixed phase precursor to obtain the spherical cobaltosic oxide, wherein the solute of the base solution in the step (1) is alkali metal hydroxide. According to the method disclosed by the invention, the precursor of the hydroxyl cobalt oxide and cobalt carbonate mixed phase can be prepared without separating kettles, the content of foreign ions in the precursor is low, and small-particle and high-purity cobaltosic oxide can be prepared by directly sintering.

The invention discloses a thermite formula for coating a ceramic layer in a steel pipe and a preparation method of the thermite formula, and relates to the technical field of steel pipe lining metal ceramic, the formula comprises aluminum powder, ferric oxide, silicon dioxide and oxygen, and further comprises copper oxide and diboron trioxide, the content of oxygen is smaller than the amount of oxygen consumed when the aluminum powder is completely oxidized, and the content of silicon dioxide is smaller than the amount of copper oxide consumed when the aluminum powder is completely oxidized. When the oxygen participating in the reaction is exhausted, aluminum which does not participate in the oxidation reaction exists. According to the invention, by adding the diboron trioxide and the copper oxide, a traditional metal ceramic lining steel pipe combined in a mechanical mode can be improved into a metal ceramic inner covering steel pipe combined in a brazing mode, so that the binding force of the inner covering layer and the base pipe is improved, and the surface flatness of the inner covering layer is improved so as to reduce the fluid conveying resistance; the metal ceramic internally-coated steel pipe manufactured through the formula and the specific implementation method has the advantages of being high in bonding force between the internally-coated layer and the base pipe, smooth in surface, resistant to high temperature and high pressure and resistant to corrosion.

The invention discloses a series of high-stability negative temperature coefficient heat-sensitive materials based on seven-principal-element high-entropy rare earth stannate and application, and aims to solve the problem that existing stannate heat-sensitive materials with pyrochlore structures cannot meet long-term application in high-temperature environments. The series of heat-sensitive materials are prepared by mixing lanthanum trioxide, neodymium oxide, samarium oxide, europium oxide, gadolinium oxide, dysprosium oxide and tin dioxide with erbium oxide or ytterbium oxide respectively, and the preparation process comprises the steps of wet three-dimensional vibration ball milling, powder calcination, cold isostatic pressing, high-temperature sintering and the like. And finally obtaining the negative temperature coefficient heat-sensitive material with the pyrochlore structure. The electrical property parameters of the series of materials are as follows: B is equal to 13914-14067 + / -1.89% K, and rho 1500 DEG C is equal to 180.26-204.09 + / -1.38% omega.cm. The negative temperature coefficient heat-sensitive material has the negative temperature coefficient characteristic in the wide temperature range of 400-1500 DEG C and shows excellent high-temperature aging stability under the high-temperature condition of 1500 DEG C, and the resistance drift rate of the negative temperature coefficient heat-sensitive material is only 0.7% after an aging test for 500 hours.

The invention discloses a rare earth element modified nickel-based nano-catalyst and a preparation method and application thereof.The rare earth element modified nickel-based nano-catalyst comprises a carrier and an active component loaded on the carrier, and the carrier is cerium dioxide and yttrium oxide co-doped three-dimensional ordered silicon dioxide nanoparticles; the active component is metal nickel. The application refers to the application of the catalyst in preparation of synthesis gas through carbon dioxide methane reforming. According to the invention, rare earth element doped and modified three-dimensional ordered silicon dioxide nanoparticles are used as a carrier, nickel metal is loaded on the nanoparticles, and the problem of carbon deposition can be effectively reduced by adjusting the interaction of alkaline sites and oxygen vacancies on the surface of the catalyst and the metal carrier. The method provided by the invention is helpful for realizing industrialization of a carbon dioxide methane catalytic reforming reaction, realizing a carbon emission reduction target and solving a green electricity energy storage problem.

The invention relates to a method for plasma-assisted sintering of calcium stannate short-wave infrared long afterglow powder, the chemical composition of the long afterglow powder is Ca2SnO4: xEr < 3 + > / Pr < 3 + > / Nd < 3 + >, and x is more than or equal to 0.1 and less than or equal to 1; the long afterglow powder takes calcium stannate as a matrix and is formed by doping and sintering rare earth capable of emitting red light. The sintering adopts a stir-frying plasma assisted low-temperature sintering method, compounds containing an erbium element, a praseodymium element and a neodymium element are doped, namely erbium trioxide, praseodymium trioxide and neodymium oxide, and H3BO3 is added as a fluxing agent to prepare a sample. The method is low in energy consumption, and the yield of the calcium stannate fluorescent powder is effectively improved; according to the invention, short-wave infrared long-afterglow luminescence of doped ions is realized, and the emission wavelength is adjustable from 800nm to 1600nm.

The invention discloses a space anti-radiation glass cover sheet and a preparation method thereof, the glass cover sheet comprises the following raw materials by mass: 50-70 parts of silica, 5-15 parts of sodium oxide, 5-10 parts of lithium oxide, 5-10 parts of diboron trioxide, 3-10 parts of lead oxide, 2-6 parts of cerium oxide, 0.5-6 parts of potassium oxide, and 2-5 parts of alumina. According to the invention, PbO and CeO2 are added into the preparation raw materials, so that the radiation resistance of the glass cover plate is enhanced.

Disclosed in the present invention are a wear-resistant high-strength lightening admixture for a drilling fluid, and a preparation method therefor. The lightening admixture comprises the following components in percentages by mass (on the basis of all the components totaling 100%): 65-75% of silicon dioxide, 5-10% of aluminum oxide, 5-10% of diboron trioxide, 5-10% of an alkaline earth metal oxide, 5-10% of an alkali metal oxide, 0.2-3% of a rare-earth element, 0-2% of ferric oxide, 0-2% of manganese dioxide, 0-2% of zirconium oxide, 0-2% of zinc oxide, and 0.2-5% of other trace element materials. The preparation method comprises: crushing, grinding and granulating all the components to prepare precursor particles; and pre-treating the precursor particles, then subjecting same to high-temperature hollow-sphere formation, and then performing a surface treatment to prepare a wear-resistant high-strength lightening admixture for a drilling fluid. The product has the advantages of being environmentally friendly an obvious density reducing effect, lubricating and resistance-reducing functions, no loss of MWD signals, etc.; moreover, the problems of low compressive strength, proneness to breakage, poor wear resistance, etc., of existing low-density hollow glass bead lightening admixtures are solved.

The application relates to the technical field of welding materials, and discloses a 600MPa-grade high-toughness ultra-low-hydrogen welding rod, which comprises a welding core and a coating arranged on the surface of the welding core, and the coating raw material comprises the following components in parts by weight: 22-32 parts of marble, 16-24 parts of feldspar, 8-12 parts of fluorite, 10-15 parts of titanium white, 4-8 parts of medium-carbon manganese iron, 1.2-3.0 parts of low-carbon silicon iron and 6-12 parts of titanium trioxide. Through the technical scheme, the problems of high weld crack rate and high diffusible hydrogen content in the related art are solved.

The application discloses a network soil thermal desorption catalyst, a preparation method and application thereof, and belongs to the field of environmental protection. The catalyst takes an iron net as a carrier and takes manganese-cobalt composite metal sulfide as an active component. The mass content of the active component is 3-6% based on the mass of the carrier. The scheme is characterized in that the iron net is subjected to oxidation pretreatment, so that an iron trioxide oxidation layer is formed on the surface; then the iron net is immersed in an active component solution to perform electrochemical deposition loading; finally, the finished catalyst is formed through special atmosphere calcination. The catalyst is environment-friendly, can efficiently induce the thermal desorption of organic pollutants in soil, and can realize 100% removal of o-xylene at 120 DEG C. Meanwhile, the catalyst is convenient to recycle, has higher economic benefits and wide market application prospect.

The invention discloses a CaCeNbWO8-based high-entropy negative temperature coefficient thermal sensitive ceramic material and a preparation method thereof, belongs to the field of negative temperature coefficient thermistors, and aims to expand the temperature zone range of a scheelite structure negative temperature coefficient thermal sensitive ceramic material. The material is prepared by mixing and firing raw materials including calcium carbonate, cerium dioxide, tungsten oxide, niobium pentoxide, samarium oxide, europium oxide, lanthanum trioxide, holmium oxide or dysprosium oxide according to a stoichiometric ratio, the chemical formula is (Ca1 / 3Ce1 / 3M1 / 3) (Nb1 / 2W1 / 2) O4, and M is Sm, Eu, La, Ho or Dy; the electrical property parameters of the thermal sensitive ceramic material with the negative temperature coefficient are as follows: B200 DEG C / 1100 DEG C is equal to 6081-7210 + / -1.8% K, rho1100 DEG C is equal to 2.87 * 10 < 3 >-4.09 * 10 < 3 > + / -1.37% omega.cm, and the applicable temperature range is 200-1100 DEG C. The material has a wide temperature range of 200-1100 DEG C, can maintain high sensitivity at a high temperature due to a large material constant B value, and shows excellent aging stability at 1000 DEG C. Through measurement, the resistance drift rate of the thermal sensitive ceramic material with the negative temperature coefficient is less than 3.49 + / -0.03% after the thermal sensitive ceramic material is aged at 1000 DEG C for 500 hours.

The invention belongs to the technical field of functional material preparation, and provides GYbZ powder for PS-PVD spraying and a preparation method of the GYbZ powder. The preparation method comprises the following steps: mixing powder preparation raw materials with water, and carrying out ball milling to obtain slurry; sequentially carrying out spray granulation and drying on the slurry to obtain a granular material; and sintering and spheroidizing the granular material by adopting plasma flame, and crushing the obtained spheroidized powder to obtain the GYbZ powder, raw materials for preparing the powder comprise the following components in percentage by mass: 38-42% of zirconium dioxide, 5-8% of ytterbium trioxide, less than or equal to 1.0% of hafnium oxide and the balance of gadolinium trioxide. According to the method, the granular material is sintered and spheroidized by adopting plasma flame, so that pores in the final GYbZ powder are relatively few. Data of the embodiment shows that the porosity of the obtained GYbZ powder is 15-19%.

The application relates to a wide-temperature-range negative temperature coefficient thermosensitive ceramic material and a preparation method thereof. The thermosensitive ceramic material comprises, in percentage by weight, 58.17-71.47% of lanthanum trioxide, 20.53-23.01% of aluminum trioxide, 3.98-15.36% of cerium dioxide and 1.54-5.94% of niobium pentoxide, and the chemical composition is La 1‑ x Ce x Al 1‑y Nb y O3, wherein x=0.05-0.20 and y=0.025-0.10. The NTC thermistor has the advantages of an ultra-wide temperature range (25 DEG C-1500 DEG C), good consistency of resistance value and B value, a resistance drift rate of less than 0.375% after aging for 500 hours at high temperature, high stability, long service life and the like.

A glass includes a composition characterized by the following constituent phases (in mol-%): 20-80 lanthanum titanate; 10-50 lanthanum niobate; 0-60 lanthanum molybdenum borate; 2-40 lanthanum borate; 2-40 yttrium borate; 0-40 gadolinium borate; 2-40 zirconium silicate; 2-40 diboron trioxide; and 0-20 silicon dioxide. A refractive index is at least 2.00.

The invention belongs to the technical field of resistor electrical elements, and particularly relates to a preparation method of a zinc oxide resistor with high gradient, large through-flow and stable impact. The zinc oxide resistor comprises zinc oxide, bismuth trioxide, antimony trioxide, nickel sesquioxide, manganous-manganic oxide, cobaltosic oxide, tin dioxide, diboron trioxide, nano silver powder, aluminum nitrate nonahydrate, barium acetate, a binder, a dispersing agent and deionized water. The zinc oxide varistor designed by the invention has the advantage of good stability under high gradient and large flux, overcomes the degeneration behavior of the zinc oxide varistor caused by the influence of the existing large-current surge impact on the zinc oxide crystal boundary potential barrier, and is suitable for industrial popularization.

The present invention discloses an Fe3O4-CNT water-based magnetic fluid, a preparation method thereof, and a magnetically controlled medium-temperature heat collection system. The preparation method includes: S1, acidifying carbon nanotubes; S2, modifying the acidified carbon nanotubes with iron tetroxide to obtain magnetic carbon nanotubes; S3, performing micro-aggregation of the magnetic carbon nanotubes based on a porous alumina template to form and collect a magnetic carbon nanotube array; S4, preparing a water-based magnetic fluid based on the magnetic carbon nanotube array. The iron tetroxide composite carbon nanotubes prepared by the present invention based on a porous alumina template are used as nanofluids in a heat collection medium, and an ideal nanodot array with artificially adjustable length is prepared, which can not only achieve a high light absorption rate, but also perform micro-regulated aggregation under the action of a magnetic field, further enhancing the photothermal conversion efficiency.

The invention belongs to the technical field of urea electrode materials produced through coupling of new energy electroreduction CO2 and NO3 <->, and discloses a copper-doped cobaltosic oxide electrode material and a preparation method and application thereof.The method comprises the steps that S1, foamy copper is sequentially soaked in hydrochloric acid, acetone, ethyl alcohol and water to be pretreated, and foamy copper without impurities on the surface is obtained; s2, dispersing a cobalt source and an organic ligand in a solvent, and stirring to obtain a mixed solution; s3, enabling the pretreated foamy copper and the mixed solution to react in a high-pressure reaction kettle, cooling to room temperature, cleaning with deionized water, and performing vacuum drying to obtain a copper-doped cobaltosic oxide electrode material; the application comprises application of the electrode material in preparation of urea through electrochemical co-reduction of CO2 and NO3 <->.

Disclosed is a method for depositing a ruthenium-containing film on a substrate by a cyclic deposition process. The method may include: contacting the substrate with a first gaseous reactant including a metal organic precursor, the metal organic precursor including a metal selected from the group consisting of platinum, aluminum, titanium, bismuth, zinc, and combinations thereof. The method may further include: contacting the substrate with a second gaseous reactant including ruthenium tetroxide, wherein the ruthenium-containing film includes at least one of a ruthenium-platinum alloy or ruthenium trioxide. Also disclosed is a device structure including a ruthenium-containing film deposited by the method of the present invention.

In a modified sulphate process for making titanium dioxide, based on an acid attack of a titanium-containing mineral such as Ilmenite and / or titaniferous slags, a method for treating an acidic liquid waste (6,6a) of a titanium dioxide production process via sulphate includes two concentration stages (S10,S20) comprising respective steps of bubbling (S11,S21) a first and a second gas (11,22) into the acidic liquid waste (6,6a,16,16a), carried out in a first reactor (41,61) at respective first and second process temperatures of at least 90°C and 150°C, respectively, the second gas containing, in particular, carbon dioxide, so as to retain obtain solid metal sulphates (23) in the first reactor (61) and a gaseous stream (24) in which sulphur trioxide SO3 and vapours of H2SO4 are present, together with water and carbon dioxide, a selective adsorption phase (S22) of SO3 / H2SO4 into a water solution (26) progressively concentrating in a second reactor (91) connected to first reactor (61) via a feed duct (92) arranged to convey gas form the first to the second rector (61,91), up to a predetermined concentration, forming a concentrated sulphuric acid (28), in which a residual gaseous stream (27) after absorption can be further fractionated to recycle the carbon dioxide into the carbon dioxide-containing gas stream (22) fed to the effluent mass, while the solid metal sulphates are recovered once the acidic liquid waste mass is exhausted. A filtration step (S12) can further be provided of filtering the partially concentrated liquid acidic waste coming from first concentration stage so as to cause the solid metal sulphates (13) settled during the first bubbling step, mainly including Ferrous sulphate to be separated.

The invention relates to the field of inorganic materials, in particular to a preparation method of antimony trioxide nanoparticles, which specifically comprises the following steps: uniformly mixing antimony sulfide ore with inorganic fused salt, transition metal oxide and a carbon material, grinding into powder, pressing the powder into blocks, smelting to obtain molten liquid, separating crude antimony from the molten liquid, dissolving the crude antimony with hydrochloric acid, and drying to obtain the antimony trioxide nanoparticles. Adding high-purity antimony powder, stirring and reacting to obtain an antimony trichloride crude solution, filtering the antimony trichloride crude solution, adding ammonia water and ionic liquid into the obtained filtrate, stirring and reacting, collecting a product, and drying. The inorganic molten salt contains metal fluoride, and antimony trioxide prepared by the method not only has a cubic crystal form, but also has a nano size, and is higher in economic added value and wider in application prospect.

This invention provides an orthogonal single-crystal manganese trioxide, lithium manganese oxide, and their preparation method, relating to the field of lithium battery technology. The orthogonal single-crystal manganese trioxide comprises mixing single-crystal manganese tetroxide with a dopant to obtain a mixture; the dopant has an ionic radius between 0.5 Å and 0.8 Å and is capable of at least partially replacing Mn. 3+ A metal dopant is introduced into the manganese trioxide lattice; the mixture is calcined at 700℃~900℃ for 3 hours~24 hours to obtain orthorhombic single-crystal manganese trioxide. The method provided by this invention can achieve the structural transformation from manganese tetroxide to manganese trioxide, obtaining orthorhombic single-crystal manganese trioxide with good crystallinity. The introduction of the dopant contributes to lattice stability and reduces oxygen defects. Controlled calcination temperature and time can obtain products with uniform morphology and stable structure, facilitating subsequent material applications.

The application discloses a kind of drilling fluid wear-resistant high-strength lightening agent and preparation method thereof, when the sum of raw material components is calculated as 100%, the mass content of each component is: 65-75% of silicon dioxide, 5-10% of aluminum oxide, 5-10% of boron oxide, 5-10% of alkaline earth metal oxide, 5-10% of alkali metal oxide, 0.2-3% of rare earth elements, 0-2% of iron trioxide, 0-2% of manganese dioxide, 0-2% of zirconium oxide, 0-2% of zinc oxide, 0.2-5% of other trace element materials. All components are crushed, ground, granulated and treated to prepare precursor particles; the precursor particles are pretreated, high-temperature hollow spheroidized, and then surface treated to prepare the drilling fluid wear-resistant high-strength lightening agent. The product has the advantages of environmental friendliness, obvious density reduction effect, lubrication and drag reduction, no loss of MWD signal, etc., and solves the problems of low pressure strength, easy breakage and poor wear resistance of existing low-density hollow glass microsphere lightening agent.

The invention discloses an ester hydrogenation catalyst as well as a preparation method and application thereof. The catalyst comprises zero-valence metal copper, composite metal oxide, auxiliary metal oxide and rare earth element oxide, the composite metal oxide is composed of copper oxide and manganese oxide and / or molybdenum oxide, and the auxiliary metal oxide is selected from at least two of aluminum oxide, silicon dioxide, magnesium oxide and titanium dioxide; the rare earth element is selected from at least one of lanthanum, cerium, praseodymium and rubidium. The prepared catalyst precursor powder is subjected to rare earth modification, extrusion or tabletting forming and reduction water heat treatment to prepare the catalyst suitable for a reaction for preparing dihydric alcohol through ester compound hydrogenation, the catalyst is applied to a reaction for preparing 1, 6-hexanediol through dimethyl adipate hydrogenation, and the performance of the catalyst is superior to that of an existing catalyst under the mild process condition; and the catalyst has long service life.

The application relates to the technical field of nanometer materials, and discloses ferroferric oxide as well as a preparation method and application thereof. The preparation method of the ferroferric oxide provided by the application comprises the following steps: placing a substrate above an iron source, depositing and growing under an oxidizing atmosphere for 8-10 min, and obtaining the ferroferric oxide after cooling; the oxidizing atmosphere comprises oxygen, and the flow rate of the oxygen is 40-60 sccm. The ferroferric oxide prepared by the method has uniform element distribution and high crystal phase purity, the material has a thermodynamically stable polycrystalline structure containing only a single crystal boundary, the single twin boundary can effectively modulate the micro-interface arrangement, and the gate control capability of the transistor of epsilon-Fe2O3 is significantly improved.

The invention provides an orthogonal single-crystal manganese sesquioxide and lithium manganate material and a preparation method thereof, and relates to the technical field of lithium batteries. The preparation method of the orthogonal single-crystal manganese sesquioxide comprises the following steps: mixing single-crystal manganous-manganic oxide with a doping agent to obtain a mixture; the doping agent is a metal doping agent which has an ion radius of 0.5-0.8 and can at least partially replace Mn < 3 + > to enter a manganese sesquioxide lattice; and calcining the mixture at the temperature of 700-900 DEG C for 3-24 hours, so as to obtain the orthogonal single crystal manganese sesquioxide. According to the method provided by the invention, the structure conversion from the manganous-manganic oxide to the manganic oxide can be realized, and the orthorhombic monocrystal manganic oxide with good crystallinity is prepared. The introduction of the dopant is beneficial to lattice stabilization and reduction of oxygen defects. And the product with uniform morphology and stable structure can be obtained by controlling the calcining temperature and time, so that the subsequent material application is facilitated.

This invention belongs to the technical field of resistive electrical components, and specifically relates to a method for preparing a zinc oxide resistor with high gradient and high current flow stability. The zinc oxide resistor comprises: zinc monoxide, bismuth trioxide, antimony trioxide, nickel trioxide, manganese tetroxide, cobalt tetroxide, tin dioxide, boron trioxide, nano-silver powder, aluminum nitrate nonahydrate, barium acetate, binder, dispersant, and deionized water. The zinc oxide resistor designed in this invention has the advantage of good stability under high gradient and high current flow, overcoming the degradation behavior of existing zinc oxide varistors caused by the influence of high current surge impact on the zinc monoxide grain boundary barrier, and is suitable for industrial application.

This invention discloses a perovskite-structured high-entropy negative temperature coefficient thermistor ceramic and its preparation method. The high-entropy negative temperature coefficient thermistor ceramic is prepared by sintering a mixture of oxides of lanthanum trioxide, neodymium trioxide, samarium trioxide, gadolinium trioxide, and RE, along with manganese dioxide. The oxides of RE are yttrium trioxide, cerium dioxide, dysprosium trioxide, holmium trioxide, ytterbium trioxide, or scandium trioxide. The material constant B of the high-entropy negative temperature coefficient thermistor ceramic is... ‑75 / 150℃ =1960K~2654K, resistivity ρ 0℃ =2122Ω·cm~6807Ω·cm, applicable temperature range is -75℃~150℃.

A method for coating a substrate with a Co—Pi modified BiVO4 / WO3 heterostructure film includes direct current reactive sputtering tungsten (W) onto a substrate in a gaseous mixture containing oxygen to form a tungsten trioxide (WO3) film, direct current reactive sputtering bismuth (Bi) onto the tungsten trioxide (WO3) film in a gaseous mixture containing oxygen to form a dibismuth trioxide (Bi2O3) film, drop-casting a vanadyl acetylacetonate solution onto the Bi2O3 film and heating at a temperature of at least 450° C. in ambient air to convert the Bi2O3 film to a BiVO4 film, and photoelectrochemically coating the BiVO4 film with a cobalt-phosphate (Co—Pi) to form a modified film on the surface of the substrate. A photoanode containing the Co—Pi modified BiVO4 / WO3 heterostructure film prepared by the method, and its application in water splitting.

The invention provides a composite deoxidizer as well as a preparation method and application thereof, and belongs to the technical field of smelting. The composite deoxidizer provided by the invention comprises the following components in percentage by mass: 30-45% of Fe, 5-20% of Fe, 10-25% of CaF, 5-8% of CaO and 6-17% of an auxiliary agent, and the auxiliary agent comprises Ce2O3 and Mg. According to the invention, rare earth oxide dicerium trioxide and Mg are added and can play a synergistic role, so that the deoxidization effect is further improved; by adjusting the component proportion of the composite deoxidizer, the deoxidizing effect of the composite deoxidizer can be improved.

The application discloses a preparation method of a high-temperature-resistant anti-degradation spherical additive for oil and gas resource exploitation, and the content of each component in the raw material is calculated according to the total mass of the components as 100%, and the content of each component is as follows: 40-55% of silicon dioxide, 35-50% of di-aluminum trioxide, 1.2-5% of di-boron trioxide, 1.8-5% of alkaline earth metal oxide, 0.8-5% of alkali metal oxide, 0.8-5% of zirconium oxide, 0.4-2% of zinc oxide and 0.4-2% of di-phosphorus pentoxide. The raw material is crushed, ground and grinded, and the high-silicon aluminum precursor particles prepared by the physical method, the chemical method or the method combining the physical method and the chemical method are pretreated, high-temperature spheroidized and surface-coated, so that the high-temperature-resistant anti-degradation spherical additive product is prepared. The product has the excellent performances of high sphericity, good fluidity, small friction resistance, easy mixing and uniformity, simple use and the like; the high-temperature-resistant anti-degradation is obvious under the well condition that the bottom hole static temperature is 150-300 DEG C, and the cement stone strength is obviously improved.

The application discloses a high-entropy rare earth chromate negative temperature coefficient thermosensitive ceramic material, a preparation method and application thereof, and belongs to the field of high-temperature thermosensitive sensors, and aims to solve the stability problem of a chromium-based perovskite in long-term use at high temperature, in particular the problem of electrical property decrease caused by Cr element volatilization. The negative temperature coefficient thermosensitive ceramic material is prepared by mixing raw materials lanthanum trioxide, neodymium trioxide, samarium trioxide, europium trioxide, gadolinium trioxide and chromium trioxide respectively with dysprosium trioxide, holmium trioxide, yttrium trioxide and erbium trioxide according to a stoichiometric ratio, and then performing wet ball milling, drying, powder calcination, cold isostatic pressing and high-temperature sintering, so that a perovskite structure (La 1 / 6 Nd 1 / 6 Sm 1 / 6 Eu 1 / 6 Gd 1 / 6 M 1 / 6 )CrO3 thermosensitive ceramic material is obtained, wherein M is Dy, Ho, Y or Er. The electrical performance parameters of the thermosensitive ceramic material are as follows: B 25℃ / 1500℃ =1927~2011 K, ρ 1500℃ =1.29×10 2 ~1.60×10 2 Ω·cm, and the thermosensitive ceramic material exhibits good high-temperature aging stability at high temperature (after aging for 500 hours at 1500 DEG C, the resistance drift rates are all less than 4.6%).