120 results about "Strontium titanate" patented technology

A toner including: a toner particle; and an inorganic fine particle, wherein the inorganic fine particle contains a strontium titanate fine particle, a Si-containing protrusion portion is present at a surface of the strontium titanate fine particle, and the toner contains an amorphous polyester resin and an aluminum element at a surface of the toner particle.

The invention discloses a multi-morphology strontium titanate photocatalyst with near-infrared light response as well as a preparation method and hydrogen production application thereof, strontium titanate precursors with different morphologies are synthesized through a hydrothermal method, the strontium titanate precursors are subjected to heat treatment under a protective atmosphere, surface carbonization is realized, and the strontium titanate photocatalyst with near-infrared light response is obtained. The multi-morphology strontium titanate photocatalyst with near-infrared light response is obtained. By selecting different titanium sources and reaction conditions, strontium titanate with various morphologies such as mesoporous microspheres, cubic phases and dendrites can be directionally synthesized, and the requirements of different application scenes on catalyst structures are met. Defects and new energy levels are introduced on the surface of SrTiO3 through surface carbonization treatment, so that the light response range of the SrTiO3 is successfully expanded to a near-infrared region, near-infrared light can be efficiently utilized for water photolysis hydrogen production, and wide application prospects are achieved.

A toner including: a toner particle containing a binder resin; and an inorganic fine particle, wherein the inorganic fine particle contains a strontium titanate fine particle A, a silica fine particle B, and a hydrotalcite particle C, Si is present at a surface of the strontium titanate fine particle A, and a value Si / Sr of a mass ratio of Si to Sr, which is detected in a fluorescent X-ray analysis of the strontium titanate fine particle A, satisfies the following formula (1); 0.20≤Si / Sr≤0.60 . . . (1).

The present application relates to the technical field of water treatment and environmental governance, and particularly relates to a nickel-strontium titanate electrode for removing uranium, a preparation method and application thereof, and the preparation method comprises the following steps: mixing a titanium source, an alcohol amine carrier and an alkaline solution to obtain a precursor solution; adding a nickel source and a strontium source into the precursor solution, performing ultrasonic treatment and hydrothermal reaction to obtain a nickel-strontium titanate material; and coating the nickel-strontium titanate material on the surface of a carbon fiber base material to obtain the nickel-strontium titanate electrode for removing uranium. Through the combination process of nickel doping, hydrothermal reaction and carbon cloth base coating, the prepared electrode forms a porous and uniformly dispersed composite structure, and meanwhile, the electrode can have optimal selectivity and removal efficiency for uranium in the range of pH 3-9. The nickel-strontium titanate electrode for removing uranium prepared by the present application is suitable for large-scale water treatment applications, and has a good application prospect in the fields of nuclear waste water and drinking water purification.

The invention belongs to the technical field of nanoimprint, and particularly discloses a metallic glass atomic-scale step preparation method based on a strontium titanate mold, which comprises the following steps: sequentially performing accurate grinding, annealing, etching, end sealing and the like on an imprint surface of single crystal strontium titanate to prepare a step mold; then preparing a Pt-based bulk metallic glass sample, carrying out thermodynamic characterization on the sample, and determining a'temperature-time 'window of thermoplastic forming; and finally, regulating and controlling nano-imprinting working condition parameters, and preparing atomic-scale steps of the metallic glass based on the strontium titanate mold so as to realize the patterning of an angstrom-scale fine structure on the surface of the metallic glass. The preparation method disclosed by the invention can be used for high-precision forming and long-service-life service of the metallic glass atomic step, and has the characteristics of simple process steps, high finished product precision, large scale and the like.

The application discloses a magnetoelectric heterojunction film and a preparation method thereof. The magnetoelectric heterojunction film comprises a strontium titanate base layer, a strontium ruthenate electrode layer, a bismuth ferrite ferroelectric material layer and a SmCo-based ferromagnetic material layer which are stacked in sequence. The magnetoelectric heterojunction film has the multi-ferroelectric layer room-temperature magnetoelectric coupling effect and the excellent magnetic performance of the ferromagnetic layer, and the magnetoelectric coupling effect of the heterojunction film can be enhanced through the strong exchange bias effect at the interface.

The invention discloses pure-phase bismuth ferrite-strontium titanate ceramic as well as a preparation method and application thereof, and belongs to the field of lead-free ferroelectric ceramic. Comprising the following steps: filling pure-phase BFO-STO precursor powder prepared by a hydrothermal method into a graphite mold, controlling the heating rate to a sintering temperature, and sintering under the conditions of external pressure and heat preservation, so as to finally prepare the BFO-STO ceramic. The BFO-STO ceramic is prepared through SPS sintering, volatilization of Bi < 3 + > and generation of impure phases are effectively inhibited, ferroelectric, dielectric and magnetic properties of the BFO ceramic are effectively improved, and possibility is provided for practical application of the BFO-STO ceramic in the fields of functional sensors, magnetic memories, piezoelectric generators, high-temperature inductors and the like.

The invention relates to the field of dielectric energy storage materials, and discloses a polyimide-based composite dielectric film material and a preparation method thereof.The dielectric film is prepared from, by mass, 4-20 parts of modified barium strontium titanate and 100 parts of fluorinated polyamide acid solution, the modified barium strontium titanate is prepared from the following raw materials: hydroxylated barium strontium titanate, 3-glycidyl ether oxypropyl trimethoxy silane, perfluoropolyether alcohol and a catalyst, and the fluorinated polyamide acid solution is prepared from the following raw materials: a fluorine-containing diamine monomer and a fluorine-containing dianhydride monomer; according to the technical scheme, the polyimide film dielectric film is prepared from fluorinated polyamide and modified silane barium strontium titanate, the dispersity of barium strontium titanate in a polyimide matrix is remarkably improved, the compatibility of barium strontium titanate and fluorinated polyimide is remarkably improved, and the dielectric energy storage performance of the dielectric film is remarkably improved; the hydroxylated barium strontium titanate is modified through the 3-glycidyl ether oxypropyl trimethoxy silane and the perfluoropolyether alcohol, so that the dielectric loss of the dielectric film is remarkably reduced.

The invention belongs to the field of film sensors, and discloses a preparation method of a lanthanum aluminate / strontium titanate nanostructure for hydrogen detection, which comprises the following steps: preparing a strontium titanate single crystal substrate, depositing a single crystal epitaxial lanthanum aluminate film on the strontium titanate single crystal substrate by pulse laser to obtain a single crystal epitaxial lanthanum aluminate / strontium titanate material; then, a stripe-shaped periodic surface nanostructure is formed on the surface of the single crystal epitaxial lanthanum aluminate thin film through femtosecond laser induction, a lanthanum aluminate / strontium titanate nanostructure is obtained, and then precious metal nanoparticles are deposited on the surface of the lanthanum aluminate / strontium titanate nanostructure. According to the preparation method, the highly-ordered single-crystal lanthanum aluminate / strontium titanate heterogeneous film is obtained by accurately controlling pulse laser deposition process parameters, and a nano stripe periodic structure is prepared on the surface of lanthanum aluminate by accurately controlling pulse femtosecond laser processing parameters, so that the specific surface area is effectively increased, gas adsorption sites are increased, and the specific surface area of the lanthanum aluminate / strontium titanate heterogeneous film is increased. And the gas charge transmission capability of the lanthanum aluminate / strontium titanate interface two-dimensional electron gas is improved.

The present application relates to a kind of preparation of complete mosaic-like barium strontium titanate solid solution ceramic sheet, which comprises the following steps: (1) two initial powders are mixed uniformly. After the stoichiometric ratio of nano barium titanate powder and nano strontium titanate powder is mechanically mixed by planetary ball mill for 24h, it is dried and ground to obtain the powder to be sintered;(2) the powder to be sintered is placed in graphite mold twice, the two powders are separated by two carbon paper, and pre-pressed in hand rotating tablet press and discharge plasma sintering furnace;(3) discharge plasma sintering is carried out, and appropriate sintering parameters are set, and sintering program is started, and after sintering, it is first rapidly cooled to a safe temperature 900 DEG C where grain growth is not easy, and then slowly cooled to 600 DEG C at 5 DEG C / min;(4) the sintered sample is placed in muffle furnace, and annealed at 800 DEG C for 10h, to obtain two relatively complete mosaic-like barium strontium titanate solid solution sheets.

A method for processing a substrate includes positioning a silicon substrate in a deposition chamber. One or more intermediate layers are deposited on a surface of the silicon. The one or more intermediate layers can include strontium, which combines with the silicon to form strontium silicide. Alternatively, the one or more intermediate layers comprise germanium. A layer of amorphous strontium titanate is deposited on the one or more intermediate layers in a transient environment in which oxygen pressure is reduced while temperature is increased. The substrate is then exposed to an oxidizing and annealing atmosphere that oxidizes the one or more intermediate layers and converts the layer of amorphous strontium titanate to crystalline strontium titanate.

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 thin-film capacitors, solves the problem that the film-forming property of a polyvinylidene fluoride thin film for improving the energy storage density of the thin film by adding an inorganic filler into a PVDF (Polyvinylidene Fluoride) base material is reduced, and particularly discloses a biaxially oriented polyvinylidene fluoride composite film for a capacitor and a preparation method of the biaxially oriented polyvinylidene fluoride composite film. The raw materials comprise 70-90 parts of polyvinylidene fluoride and 10-30 parts of a modified dielectric enhanced nanofiller; the modified dielectric enhanced nano filler is a modified filler obtained by using a dielectric enhanced filler as a raw material and performing surface grafting fluorosilane modification treatment, and the dielectric enhanced filler comprises one or more of nano barium titanate, nano strontium titanate and nano barium strontium titanate. Polyvinylidene fluoride is used as a membrane material matrix, and chemical modification and graft modification of fluorosilane are performed on the surface of a filler, so that the compatibility of the filler with polyvinylidene fluoride containing a large number of fluorine groups is increased, particle agglomeration is reduced, and meanwhile, the energy storage density, the membrane forming property and the like of the polyvinylidene fluoride composite membrane are improved.

The invention discloses a high-voltage strontium titanate ceramic material and application thereof, and belongs to the technical field of lead-free dielectric ceramic materials. The chemical general formula of the high-voltage strontium titanate ceramic material is (SrmAnBnCqDs) (TixEyFy) O3, wherein m + 2n + q + s = 1, m, n, q, sgt; 0, x + 2y = 1, xgt; 0, 0 < y < = 0.2; the element A and the element B form an A-B heterovalent element pair, the sum of element valence states of the A-B heterovalent element pair is 4, and at least one A-B heterovalent element pair is arranged; the element C and the element D are not element pairs, the valence states of the elements are positive bivalent, and the element A, the element B, the element C and the element D are different in composition elements; the element E and the element F form an EF hetero-valent element pair, the sum of element valence states of the EF hetero-valent element pair is 8, and at least one EF hetero-valent element pair is arranged. The breakdown voltage and capacitance of the high-voltage ceramic capacitor can be improved while the miniaturization of the high-voltage ceramic capacitor is maintained.

The invention provides a spherical polyhedral strontium titanate single crystal particle as well as a preparation method and application thereof. The preparation method of the spherical polyhedral strontium titanate single crystal particles comprises the following steps: mixing a titanium source, a strontium source, a morphology regulating agent, an aluminum source and alkali liquor, and carrying out ultrasonic dispersion to obtain a mixed solution; carrying out hydrothermal reaction on the mixed solution, and then washing and drying to obtain the spherical polyhedral strontium titanate single crystal particles. The regular spherical polyhedral strontium titanate single-crystal particles are prepared by adopting a hydrothermal method and utilizing a titanium source, a strontium source and an aluminum source, effective exposure of a plurality of micro crystal faces with different orientations such as (100), (110) and (111) is realized, and the regular spherical polyhedral strontium titanate single-crystal particles are applied to the field of photocatalysis and can show an efficient water photolysis hydrogen production rate under a sun illumination condition.

The application belongs to the field of electronic components, and particularly relates to a MCM-1A type high-frequency metal packaging mica capacitor. The capacitor is composed of a metal packaging shell, a core group in the shell is fixed by a silver-plated metal gasket, and the core group is composed of multiple pieces of white mica sheets printed with electrodes and silver-plated metal lead-out sheets alternately stacked. A dielectric topological insulator heterojunction composite nanomaterial is introduced into the silver-plated metal gasket. The material takes a bismuth diselenide nanosheet as a core, coats a barium strontium titanate shell through an atomic layer deposition process, and is modified through surface polymer coating. The composite nanomaterial effectively optimizes the interface characteristics and high-frequency conductivity of the electrode. The capacitor has a simple preparation process, is compatible with the existing production line, has lower loss and higher temperature stability at high frequency, and is suitable for high-frequency circuits.

The invention discloses a high-temperature energy storage dielectric nano composite film and a preparation method thereof, and belongs to the technical field of polymer-based energy storage dielectric materials. The method comprises the following steps: synthesizing sub-10-nanometer barium strontium titanate relaxor ferroelectric particles coated with PVP (Polyvinyl Pyrrolidone) on the surfaces by adopting a one-step gel method by regulating and controlling the proportion of barium to strontium, uniformly mixing the sub-10-nanometer barium strontium titanate relaxor ferroelectric particles with a polyimide precursor through a wet-process compounding process, and then carrying out casting film scraping and step-by-step thermal imidization treatment to obtain the high-temperature-resistant energy storage composite material with uniformly dispersed nanoparticles. The ultra-small-size barium strontium titanate relaxation ferroelectric particles are introduced, so that the dielectric constant of the composite material can be improved, and meanwhile, the high energy efficiency can be maintained; based on a wet composite process, PVP coated on the surfaces of particles can effectively prevent agglomeration and promote uniform dispersion of the particles in a polyimide matrix, so that the organic-inorganic interface action is enhanced, local electric field distortion is inhibited, a deep energy level trap is introduced, and the dielectric constant and breakdown field strength of the material at high temperature are remarkably improved; and finally, the high-temperature energy storage performance is remarkably improved. By combining relaxation ferroelectric characteristics of ultra-small-size barium strontium titanate with an optimized wet-process composite process, the preparation method has the advantages of low addition amount of inorganic filler, simple and convenient preparation process, remarkable improvement of high-temperature energy storage performance and the like, and can meet application requirements of current and future high-performance high-temperature energy storage dielectrics.

This invention discloses a method for preparing a strontium titanate modified layer on the surface of zirconia based on an impregnation-heat treatment method, comprising: (1) mixing titanium sulfate, urea and water to obtain a precursor liquid A, placing zirconia ceramic in the precursor liquid A, heating to boiling and maintaining for a period of time, then removing the zirconia ceramic, and after heat treatment A, preparing a titanium dioxide film on the surface of zirconia; (2) mixing H2O2 aqueous solution, ammonia and deionized water, adding metatitanic acid and stirring to dissolve, obtaining a precursor liquid B, placing the zirconia with the titanium dioxide film in the precursor liquid B, and allowing it to stand and react for a period of time at room temperature, depositing zirconia modified with a titanium dioxide precursor layer; (3) dissolving strontium acetate, or a mixed salt composed of calcium acetate and / or magnesium acetate and strontium acetate in deionized water to obtain an impregnation treatment solution, placing the zirconia modified with the titanium dioxide precursor layer in the impregnation treatment solution, allowing it to stand and react for a period of time, and then removing it, and after heat treatment B, preparing a strontium titanate modified layer on the surface of zirconia. The strontium titanate layer prepared on the surface of zirconia ceramic in this invention is tightly attached to the zirconia substrate and has high hydrophilicity, which is conducive to the adhesion of proteins and cells in the human body. At the same time, it can release active factors such as strontium ions for a long time to promote bone formation and bone regeneration at the implantation site, ultimately enhancing the osseointegration capacity of the zirconia implant.

The invention belongs to the technical field of crystal growth, and particularly relates to a strontium titanate single crystal growth device which comprises a shell, a controller is fixedly connected to the side wall of the shell, a star-shaped unloader is fixedly connected to the upper side wall of the shell, and a storage box is communicated with a feeding port of the star-shaped unloader; the discharging end of the star-shaped discharger is located in the shell. Before the strontium titanate single crystal is prepared, the strontium titanate sol type liquid is sprayed on the surface of the seed crystal, then the strontium titanate sol type liquid is dried at low temperature and heated at high temperature, and a layer of nanoscale strontium titanate film completely matched with a substrate lattice is formed on the surface of the seed crystal. The thin film not only can eliminate micro concave-convex and oxidation impurities on the surface of the seed crystal, greatly improve the wetting effect of the melt and the seed crystal and avoid crystal orientation deviation caused by heterogeneous nucleation, but also can be used as a directional template in the initial growth stage to ensure that the melt stably grows along the target crystal orientation.

This invention provides an electrophotographic apparatus that features a toner containing strontium titanate as an external additive and a highly durable electrophotographic photoreceptor, resulting in excellent transfer performance even in low-temperature, low-humidity environments. [Solution] An electrophotographic apparatus is provided, comprising: an electrophotographic photoreceptor having a surface layer containing resin X as a binder resin; charging means for charging the surface of the electrophotographic photoreceptor; exposure means for irradiating the charged surface of the electrophotographic photoreceptor with light to form an electrostatic latent image; developing means for supplying toner to the electrostatic latent image to form a toner image; and transfer means for transferring the toner image to a transfer medium, wherein the toner contains strontium titanate as an external additive, and the resin X contains a specific structural unit.

The embodiment of the present disclosure discloses a kind of aluminum-doped strontium titanate loaded sulfur zinc cadmium photocatalytic composite materials and preparation method thereof, the preparation method includes: step S1, aluminum ion is incorporated into strontium titanate using salt melting method, and aluminum-doped strontium titanate is obtained;Step S2, aluminum-doped strontium titanate, cadmium source, zinc source and sulfur source are added to pure water, and precursor solution is obtained after mixing treatment;Step S3, precursor solution is transferred to reaction kettle, and after sealing reaction kettle, it is placed in air drying oven to carry out hydrothermal reaction;Step S4, the precipitate after hydrothermal reaction is treated, and the aluminum-doped strontium titanate loaded sulfur zinc cadmium photocatalytic composite material is obtained.The method can improve the visible light absorption range of strontium titanate and photoelectric conversion efficiency, and improve the photocatalyst photocatalytic water decomposition hydrogen production performance.

The invention relates to a toner. A toner includes toner particles each containing a binder resin and a colorant and strontium titanate fine particles. The strontium titanate fine particles have a work function of 5.65 eV to 7.00 eV.

Various embodiments provide for systems and techniques for the successful fabrication of metal oxide (TMO)-on-glass layer stacks via direct deposition. The resulting samples feature epitaxial, strontium titanate (STO) or barium titanate (BTO) films on silicon dioxide (SiO2) layers, forming STO- or BTO-buffered SiO2 pseudo-substrates. As the integration of TMO films on silicon rely on an STO or BTO buffer layer, a wide variety of TMO-based integrated devices (e.g., circuits, waveguides, etc.) can be fabricated from the TMO-on-glass platform of the present technology. Moreover, the STO, or the BTO, survives the fabrication process without a corresponding degradation of crystalline quality, as evidenced by various objective measures.

The invention discloses a wide-temperature-range stable energy storage ceramic capacitor dielectric material and a preparation method thereof. The material comprises a tetragonal sodium bismuth titanate-strontium titanate matrix phase and an orthorhombic calcium iron tantalate solid solution phase, the molar ratio of the matrix phase to the solid solution phase is 1: a, and a is greater than 0 and less than or equal to 0.33. The preparation method of the material comprises the following steps: weighing the raw materials according to the stoichiometric ratio, and carrying out primary ball milling, pre-sintering, secondary ball milling, granulation, blank making and sintering to obtain the material. According to the dielectric material, A-site and B-site multi-element co-doping is carried out in a perovskite structure, so that long-range ferroelectric order is destroyed into a polar nanometer micro-region; and Ca < 2 + > with small ion radius induces the oxygen octahedron to incline orderly to form a ferroelastic micro-domain structure. The ferroelastic-ferroelectric hybrid structure plays an important role in reducing hysteresis loss, improving a breakdown electric field and ensuring structural stability. The dielectric ceramic solves the technical problems that sodium bismuth titanate-based energy storage ceramic is low in energy storage density and difficult to stably work in a wide temperature range.

A resin composition for molding, which contains a curable resin and an inorganic filler that contains alumina particles and calcium titanate particles and / or strontium titanate particles, the total content of the calcium titanate particles and the strontium titanate particles being 5.0-15.0 vol% with respect to the entire inorganic filler, and the content of the calcium titanate particles and the strontium titanate particles being 5.0-15.0 vol% with respect to the entire inorganic filler. The content of the entire inorganic filler is more than 60 vol% with respect to the entire molding resin composition.

The invention relates to the technical field of photocatalytic materials, and discloses a scandium-doped strontium titanate crystal as well as a preparation method and application thereof. In the scandium-doped strontium titanate crystal, the molar ratio of scandium to titanium is (0.01-0.1): 1. Through doping of Sc < 3 + >, formation of Ti < 3 + > defects is effectively inhibited, relatively small lattice distortion is realized, high crystallinity of the crystal is maintained, and recombination of photo-induced electron holes is effectively inhibited; the scandium-doped strontium titanate crystal has specific exposed {100} and {110} crystal faces, an inter-face built-in electric field can be generated between the crystal faces, and the built-in electric field effectively promotes separation and transfer of photo-induced electrons and photo-induced holes; the scandium-doped strontium titanate catalyst formed by respectively depositing Rh / Cr2O3 and CoOOH cocatalysts on {100} and {110} crystal faces of scandium-doped strontium titanate crystals can be applied to photocatalytic complete water splitting, the apparent quantum efficiency under 365 nm monochromatic light is close to 100%, the energy conversion efficiency from solar energy to hydrogen energy reaches 34.5%, and the scandium-doped strontium titanate catalyst shows excellent cycle stability and application potential under outdoor actual sunlight.

A toner comprising a toner particle comprising a binder resin, and a strontium titanate particle and a hydrotalcite particle on a surface of the toner particle, wherein the hydrotalcite particle comprises fluorine, the fluorine is present inside the hydrotalcite particle in line analysis of STEM-EDS mapping analysis of the toner, and when an area ratio of the strontium titanate particle to the toner particle in an EDS measurement field, which is measured through the STEM-EDS mapping analysis of the toner, is defined as T1 (%) and an area ratio of the hydrotalcite particle to the toner particle in the EDS measurement field, which is measured through the STEM-EDS mapping analysis of the toner, is defined as H1 (%),T1 / H1 is 0.15 to 9.00.

This invention discloses a method for preparing flexible self-supporting silver niobate thin films. The method involves first pretreating a strontium titanate substrate; then, using pulsed laser deposition, a strontium aluminate sacrificial layer and a silver niobate functional layer are sequentially sputtered onto the strontium titanate substrate to form an STO / SAO / ANO heterostructure; finally, polydimethylsiloxane is attached to the surface of the silver niobate functional layer, and the strontium aluminate sacrificial layer is dissolved in deionized water to obtain a self-supporting silver niobate thin film. This invention achieves damage-free exfoliation of the silver niobate thin film by introducing a water-soluble strontium aluminate sacrificial layer. The prepared flexible self-supporting thin film exhibits good polarization characteristics, double hysteresis loop features, and excellent electrical stability, making it suitable for the development of perovskite-based oxide flexible functional devices. This method is controllable and reproducible, providing high-quality self-supporting functional thin film materials for flexible electronic devices.

A tantalum and nitrogen co-doped strontium titanate with perovskite structure, is a photocatalytic material. Titanium isopropoxide and tantalum pentachloride are dissolved in methanol, then ethylene glycol, citric acid and strontium carbonate are added, a polymerization reaction product is calcined with air to remove organic carbon, and tantalum doped strontium titanate is obtained. The tantalum doped strontium titanate is mixed with magnesium powder and nitrided in an atmosphere of an ammonia gas flow. A nitrided product is acid-pickled, water-washed and dried, and the tantalum and nitrogen co-doped strontium titanate with perovskite structure is obtained. A titanium-oxygen bond is weakened by pre-doping tantalum, and a magnesium powder-assisted nitridation method is used, such that spatial distribution of a high-content nitrogen dopant in strontium titanate is realized.

The invention relates to a high-temperature self-stabilization ferroelectric domain wall memory based on bismuth oxide (BFO) and a preparation method thereof, a memory function layer is formed by sequentially depositing an STO buffer layer with the thickness of 5 nm, a BFO film with the thickness of 100 nm and a planar Pt electrode pair on a strontium titanate (STO) substrate in the [001] direction, the STO substrate is obliquely cut by 0.2 degree in the [100] direction, the BFO film is of a stripe domain structure, and the electrode gap is not smaller than 500 nm. Through the limiting effect of a beveled substrate step, the BFO ferroelectric film only forms two polarization orientations, a periodic stripe domain structure is obtained, the polarization overturning controllability is improved, the electrode is prepared by adopting an electron beam photoetching and ion etching combined process, the electric domain overturning is ensured to penetrate through the film thickness, and the performance of the BFO ferroelectric film is improved. After 105 times of voltage pulse cycles at a high temperature of 135 DEG C, the device still keeps a rectification ratio greater than or equal to 25: 1, the turnover polarization retentivity is high, and the domain wall current attenuation rate is small. The bottleneck that a traditional FeRAM fails in a high-temperature environment is broken through, the storage density potential is larger than 1 Gb, and the FeRAM has the effect of being suitable for high-temperature application scenes such as aerospace, vehicle-mounted electronics and geothermal exploration.