43 results about "Ceramic thin films" patented technology

The invention discloses a high-wear-resistance additive forming titanium-based composite material and a preparation method thereof. The high-abrasion-resistance additive forming titanium-based composite material is mainly composed of a base body and an amorphous ceramic film, and the high-abrasion-resistance additive forming titanium-based composite material is prepared from, by mass, 97.0%-99.8% of the base body and 0.2%-3% of the amorphous ceramic film. By accurately controlling the thickness and the quality of the amorphous ceramic film, the number and the size of the reinforced phases can be regulated and controlled, and the fluidity and the oxidation resistance of the additive manufacturing titanium alloy powder can be remarkably improved through introduction of the amorphous ceramic film; the in-situ synthesis ceramic reinforced titanium-based composite material prepared through additive manufacturing is free of cracks, high in hardness, good in wear resistance and suitable for being used under harsh working conditions.

In a general aspect, a ceramic thin film with nanotwinned regions at a tunable volume fraction is manufactured. In some aspects, a method for manufacturing a ceramic thin film on a surface of a substrate in an evacuated chamber is disclosed. The ceramic thin film includes crystalline grains; and each of the crystalline grains includes one or more nanotwinned regions. The one or more nanotwinned regions have a volume fraction in a range of 30-80% of the ceramic thin film. The ceramic thin film comprises titanium, nitrogen, and boron. A plurality of targets including a plurality of sputtering materials is prepared. A gas atmosphere in the evacuated chamber is formed. Electric power is supplied to the plurality of targets to cause co-sputtering of the plurality of sputtering materials to form the ceramic thin film with the one or more nanotwinned regions.

To provide a film deposition apparatus capable of enhancing an adhesion efficiency of ceramic raw material powder.SOLUTION: A film deposition apparatus includes an aerosol generator 6, a nozzle 10, transfer gas supply means 15 having a transfer gas supply tube S2, accelerated gas supply means 20 having an accelerated gas supply tube S3, and heating means 23. The transfer gas supply tube S2 is connected to the nozzle 10 such that an ejection edge thereof is located in the nozzle 10 and a flow line of transfer gas ejected from the ejection edge has a linear shape up to the ejection edge of the nozzle 10. The accelerated gas supply tube S3 is connected to the nozzle 10 such that an ejection edge thereof is located in the vicinity of the ejection edge of the transfer gas supply tube S2 in the nozzle 10 and a flow line of accelerated gas ejected from the ejection edge collides the flow line of transfer gas.SELECTED DRAWING: Figure 1

The application discloses a high-temperature-resistant film temperature sensor preparation method based on laser manufacturing. First, a precursor film of a polymer precursor ceramic is coated on a substrate. After being heated to 180 DEG C or being naturally placed to solidify, the precursor film is scanned by a fiber laser in a certain mode, and the unnecessary part is removed, and the pattern part is left, so that the polymer precursor ceramic sensing film is simultaneously completed by patterning and pyrolysis. By using the technical scheme, the problems of a wide pattern, low preparation efficiency and high cost of the polymer precursor ceramic film are solved.

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 application belongs to the field of material chemistry, and particularly relates to a kind of one-side densification large-size biomimetic ceramic Janus film and a preparation method thereof.The Janus film is a two-layer structure composed of a dense layer and a loose layer, the dense layer is aragonite crystal, and the loose layer contains aragonite and calcite crystals.The application induces crystal densification growth by limited effect, does not need the extreme environment of high temperature and high pressure in traditional densification ceramic firing, successfully prepares one-side densification mineral film under mild experimental conditions, saves energy, and provides favorable conditions for subsequent mechanism research and expansion of synthesis method.

The application discloses a high-wear-resistance additive forming titanium-based composite material and a preparation method thereof. The high-wear-resistance additive forming titanium-based composite material is mainly composed of a matrix and an amorphous ceramic film, and the mass fraction of each component of the high-wear-resistance additive forming titanium-based composite material is as follows: the matrix is 97.0-99.8%, and the amorphous ceramic film is 0.2-3%. The application can realize the quantity and size regulation of the reinforcing phase by precisely controlling the thickness and mass of the amorphous ceramic film. The introduction of the amorphous ceramic film can significantly improve the flowability and oxidation resistance of the additive manufacturing titanium alloy powder. The in-situ self-grown ceramic reinforced titanium-based composite material prepared by additive manufacturing is crack-free, has high hardness and good wear resistance, and is suitable for use under harsh working conditions.

The invention discloses a method for improving the energy storage performance of a flexible ceramic film based on a strain effect, and relates to the technical field of energy storage dielectric capacitors, and the method comprises the following steps: S1, preparing a precursor solution; s2, preparing a thin film; and S3, depositing a gold electrode. According to the method for improving the energy storage performance of the flexible ceramic thin film based on the strain effect, the effect of improving the energy storage density and efficiency is obvious, and the value of strain mismatch of the substrate and the ceramic thin film can be continuously adjusted.

The invention discloses a method for improving the energy storage performance of a self-supporting ceramic film based on a strain effect, and relates to the technical field of energy storage dielectric capacitors, and the method comprises the following steps: S1, preparing a Sr3Al2O6 sacrificial layer; step S2, depositing SrRuO3 (SrRuO3); s3, sputtering a bottom electrode and a ferroelectric body; s4, dissolving the sacrificial layer and the acrylic resin adhesive; and S5, replacing the flexible substrate. According to the method for improving the energy storage performance of the self-supporting ceramic thin film based on the strain effect, the effect of improving the energy storage density and efficiency is obvious, and a replaceable substrate with a wider strain adjusting range can be configured for the ceramic thin film.

To provide a ceramic film for a TPV power generation device that has sufficient strength and can acquire a desirable radiation spectrum.SOLUTION: A ceramic film 20 including a pore formed on a substrate includes: a plurality of high-density regions 1 having a density that is larger than an average density of the whole ceramic film; and a plurality of low-density regions 2 having a density that is smaller than the average density of the whole ceramic film. The high-density regions 1 and the low-density regions 2 are stacked in layers. The ceramic film comprises a rare-earth element-containing oxide ceramic.SELECTED DRAWING: Figure 1

The application discloses a cylindrical front body ceramic thin film temperature sensor and a preparation device and a preparation method thereof, and the temperature sensor comprises a cylindrical substrate, a ceramic thin film sensitive grid, a welding spot, a lead wire and a fixing part, the ceramic thin film sensitive grid and the welding spot are conformally laid on the cylindrical substrate through a curved surface weissenberg direct writing forming technology and are prepared through pyrolysis and ceramicization, the welding spot is arranged on the ceramic thin film sensitive grid, the lead wire is connected with the welding spot, and the fixing part is covered on the welding spot. The application can realize in-situ preparation of the ceramic thin film temperature sensor on a cylindrical substrate such as a bearing and a bolt, the sensor has the advantages of in-situ nondestructive detection, strong resistance to extreme environment and less influence on surface characteristics of a structure to be measured, and the preparation device and the method have the advantages of high cylindrical patterning efficiency and simple process, thereby providing a new idea for popularization of high-temperature thin film sensors to practical application.

Provided herein are processing apparatuses for producing high-quality films of sintered ceramics. The instant disclosure sets forth equipment and processes for making high quality, rapidly processed ceramic electrolyte films. These processes include high-throughput continuous sintering of oxides for use as electrolyte films. In certain processes, the film is not in contact with any surface as it sinters (i.e., during the sintering phase).Set forth herein are processes for making and using bilayers comprising a green body layer on a metal layer and bilayers comprising a sintered oxide layer on a metal layer. Set forth herein are processes for rapidly sintering thin bilayers comprising a green body layer on a metal layer in order to produce bilayers comprising a sintered oxide layer on a metal layer.

The invention relates to the technical field of ceramic thin film preparation, and discloses a method for directly printing an aluminum oxide ceramic thin film based on room-temperature liquid metal, which comprises the following steps: introducing an aluminum metal simple substance into gallium-based liquid metal, then putting the mixed room-temperature soft metal into deionized water for activation, and putting the activated room-temperature soft metal into a room-temperature atmospheric environment to form an aluminum oxide thin film. The preparation process is simple, the reaction conditions are mild, the film forming rate is high and easy to control, and the method is environmentally friendly, the hardness of the prepared film is 7.93 HV, the bending strength is about 3.6 MPa, the machinability is high, and the method is suitable for application and popularization.

The present application relates to a kind of polymer precursor ceramic film thermocouple and its manufacturing method, thermocouple includes A electrode and B electrode, it is made on electric insulating coating, then lead is connected with welding spot, to output electric signal, manufacturing method is as follows: polysilazane solution and indium tin oxide (tin content 10% mass fraction) nano powder are mixed according to certain proportion to prepare A electrode, polysilazane solution and indium tin oxide (tin content 5% mass fraction) nano powder are mixed according to certain proportion to prepare B electrode, after screen printing, thin film A electrode line, B electrode line is obtained in electric insulating coating, and after solidification, it is placed in tube furnace, with 1 ℃ / min heating rate to 450 ℃, keep warm 1 hour;Again with 2.5 ℃ / min heating rate to 1000 ℃, keep warm 1 hour;Finally with 2.5 ℃ / min cooling rate to room temperature, finally, platinum wire is connected to two electrodes with welding spot, to output electric signal.

A rare earth-based electrolytic coloring method, electrolyte, and alloy product are provided, where the method includes: after an oxide film is formed on a workpiece subjected to anodic oxidation in the electrolyte, rapidly increasing a voltage, and by using a constant-voltage mode, breaking down, melting, sintering, and reforming the oxide film cyclically multiple times under conditions of high frequency, a high voltage, and instantaneous high temperature, to generate a ceramic film layer metallurgically bonded to a substrate. The oxide film has a greater thickness and lower reflectance, and an appearance as a matte black anode, and has good color consistency and no chromatic aberration. Components of the electrolyte include sodium silicate at a concentration of 5-70 g / L, sodium tungstate at a concentration of 1-18 g / L, disodium ethylenediamine tetraacetic acid at a concentration of 2-10 g / L, and rare earth salts at concentrations of 1-2 g / L.

The application relates to the technical field of sound wave detection, in particular to a sound vibration cavity sensing structure based on a porous array type PZT, which comprises a cavity, a piezoelectric ceramic film, a positive electrode and a negative electrode. The piezoelectric ceramic film is arranged on the opening of the cavity and is fixedly connected with the opening end of the cavity. A plurality of half-through holes are arranged on the piezoelectric ceramic film. The positive electrode is arranged on the outer surface of the piezoelectric ceramic film, and the negative electrode is arranged on the inner surface of the piezoelectric ceramic film. The material of the piezoelectric ceramic film is lead zirconate titanate. The application has higher sensitivity and better low-frequency response performance, and has a good application prospect in the technical field of sound wave detection.

The embodiment of the invention discloses a double-layer piezoelectric film ultrasonic transducer and a preparation method thereof. The ultrasonic transducer comprises a bottom silicon layer, wherein the bottom silicon layer comprises a vibrating diaphragm area and an electrode leading-out area; the vibrating diaphragm area comprises a first piezoelectric ceramic unit and a second piezoelectric ceramic unit which are stacked in the thickness direction; each of the first piezoelectric ceramic unit and the second piezoelectric ceramic unit comprises a bottom electrode, a piezoelectric ceramic film and a top electrode; the top electrode of the first piezoelectric ceramic unit and the bottom electrode of the second piezoelectric ceramic unit are reused. According to the double-layer piezoelectric film ultrasonic transducer and the preparation method thereof provided by the embodiment of the invention, the transmitting and receiving sensitivity of the transducer is improved on the premise that the overall rigidity and the resonant frequency of the vibrating diaphragm are kept basically unchanged by adopting the structure of the double-layer piezoelectric film and the electrodes; the problem that the electromechanical conversion efficiency is not high due to the fact that a driving electric field of a traditional single-layer structure is limited is solved.

This application proposes a strong ferromagnetic ceramic thin film based on iron-tin co-doped amorphous gallium oxide, belonging to the technical field of magnetic semiconductor ceramic materials. The invention involves thoroughly mixing Ga, Fe, and Sn organic precursor solutions in a specific ratio to form a GaFeSn organic precursor solution; spin-coating the GaFeSn organic precursor solution onto a cleaned single-crystal alumina substrate; then placing the resulting GaFeSn organic precursor film into a single-temperature tube furnace; under an air atmosphere, slowly raising the furnace temperature to 550°C at a rate of 5°C / min, and annealing at 550°C for 1 hour to prepare a uniformly thick amorphous GaFeSnO magnetic ceramic thin film with strong ferromagnetism. This invention excites strong ferromagnetism in the film with a relatively low iron doping concentration (10%), solving the problem of low conductivity caused by transition metal doping in magnetic ceramic thin films. The amorphous GaFeSnO magnetic ceramic thin film prepared by this invention exhibits a conductivity of 170 emu / cm² at 2K. 3 90 emu / cm at 300K 3 It has strong ferromagnetism and a Curie temperature as high as 335K.

The invention discloses a self-supporting peelable multilayer ceramic thin film capacitor, and relates to the technical field of ceramic thin film capacitors, and the self-supporting peelable multilayer ceramic thin film capacitor is prepared by a preparation method comprising the following steps: S1, selecting a substrate; step S2, preparing a Sr3Al2O6 sacrificial layer; step S3, preparation of an MLFC precursor solution; step S4, preparing an MLFC (mixed liquid fuel cell); step S5, preparing the multi-layer MLFC; and step S6, stripping the multi-layer MLFC. The self-supporting peelable multilayer ceramic film capacitor disclosed by the invention is low in dielectric loss and large in capacitance, and can realize peeling of an MLFC (Multilayer Ceramic Film Capacitor) to form an independent discrete device.

The utility model relates to an anti-interference noise detection device, which comprises an outer shell, an inner shell and a sound transmission unit, the inner shell is arranged inside the outer shell, the sound transmission unit comprises a dust cover, a vibrating diaphragm, a preamplifier, a filter and a digital signal processing and controlling device, the surface of the outer shell is provided with a plurality of sound transmission holes in an annular array, and the sound transmission holes are communicated with the inner shell. The sound transmission hole is formed in the outer shell, the dust cover is arranged on the outer shell, the vibrating diaphragm and the pre-amplifier are arranged in the sound transmission hole, a self-cleaning assembly is arranged between the vibrating diaphragm and the dust cover, and the self-cleaning assembly comprises a PZT piezoelectric ceramic film, a high-frequency driving circuit and flexible conductive silver adhesive. The PZT piezoelectric ceramic film converts electric energy into mechanical vibration energy through the inverse piezoelectric effect, periodic deformation is generated in the PZT material, high-frequency standing wave vibration perpendicular to the surface of the film is formed, and therefore dust particles attached to the surface of the dust cover are thrown away from the surface.

The invention relates to the technical field of laser welding, in particular to an aluminum-titanium dissimilar metal composite laser welding method and an aluminum-titanium welding head. S1, depositing a ceramic film on the surface of the titanium metal part or the aluminum metal part; s2, the aluminum metal part and the titanium metal part are stacked and relatively fixed, and a to-be-welded part is obtained; s3, the blue laser, the point infrared laser and the ring infrared laser are combined and focused to a welding site on the surface of the to-be-welded part, and a composite laser beam is formed; s4, welding the to-be-welded part by keeping the composite laser beam in an oscillating and swinging manner; according to the aluminum-titanium dissimilar metal composite laser welding method and the aluminum-titanium welding head, the porosity and the crack rate in a welding seam can be reduced, and the comprehensive mechanical property of the welding seam is improved.

This invention belongs to the field of cutting force sensors, and relates to a polymer precursor ceramic thin film and a cutting force sensor. The preparation method of the polymer precursor ceramic thin film includes: 1) weighing PSN solution, SiCN powder, and TiSi2 powder in a mass ratio of 1:1:0.9-1.1, and mixing them to obtain a slurry; 2) stirring the slurry obtained in step 1) in a nitrogen atmosphere until uniformly mixed; 3) pouring the uniformly mixed slurry into a mold and leveling the slurry in the mold; 4) placing the mold containing the slurry in an oven to promote complete curing of the slurry; 5) placing the cured whole in a high-temperature furnace and pyrolyzing it under a nitrogen atmosphere to obtain the polymer precursor ceramic thin film. This invention provides a miniaturized polymer precursor ceramic thin film and a cutting force sensor with good sensing performance.

The application provides a kind of iron-doped gallium oxide-based strong ferromagnetic ceramic film material and a preparation method thereof, and relates to the technical field of magnetic semiconductor ceramic materials.The Ga organic precursor solution and the Fe organic precursor solution are prepared first;Then the Ga and Fe organic precursor solutions are mixed in a certain proportion to form a GaFe organic precursor solution;The GaFe organic precursor solution is spin-coated on a cleaned single-crystal alumina substrate;The obtained GaFe film is placed in a single-temperature zone tube furnace;In an air atmosphere, the temperature of the tube furnace is first increased to 550 DEG C at a slow rate of 2 DEG C / min, and then annealed for 1 h, and then increased to greater than or equal to 750 DEG C at the same heating rate for annealing treatment, and then annealed for 1 h, thereby preparing a GaFeO magnetic ceramic film with a very uniform surface and strong ferromagnetism.The preparation method of the application has low environmental requirements, and the GaFeO magnetic ceramic film prepared by the application has good crystallinity and crystalline orientation, excellent strong ferromagnetism, and a Curie temperature higher than 352 K.

The present disclosure provides a polymer-derived ceramic thin film thermocouple and a preparation method thereof. The polymer-derived ceramic thin film thermocouple comprises an A electrode and a B electrode, wherein one end of the A electrode and one end of the B electrode intersect and overlap to form hot junctions, an end of the A electrode away from the hot junction and the end of the B electrode away from the hot junction are provided with solder joints. Each solder joint may be connected to a lead wire, the lead wire is configured for output a signal; the A electrode is prepared by mixing a polysilazane solution, nanocomposite powder and a xylene solution, and the nanocomposite is prepared by mixing indium oxide nanopowder, zinc oxide powder and anhydrous ethanol; the B electrode is prepared by mixing a polysilazane solution, indium oxide nanopowder, and a xylene solution.

The invention discloses a method for improving the energy storage performance of a ceramic film based on a strain effect, and relates to the technical field of energy storage dielectric capacitors, and the method comprises the following steps: S1, depositing a ferroelectric on a substrate in a coherent manner, and preparing a ferroelectric single crystal film with biaxial tensile strain on the surface of the substrate; and S2, plating an Au electrode on the surface of the ferroelectric single crystal film prepared in the step S1 to form a capacitor, and then testing a ferroelectric hysteresis loop to calculate the energy storage performance. According to the method for improving the energy storage performance of the ceramic thin film based on the strain effect, the effect of improving the energy storage density and efficiency is obvious.

The application provides a low-temperature melt reaction method for preparing a dense ceramic film. The application introduces a low-temperature melt, makes high-melting-point reactants dissolve in the melt and react, and after reaching supersaturation, the target product crystals are precipitated and gradually grow and connect, and finally a dense ceramic film with a thickness of 1-10 microns is obtained. The application changes the solid-solid system in the traditional sintering method into a solid-liquid system, and the mass transfer and reaction rate are faster; meanwhile, the problems such as deformation and element segregation caused by the traditional high-temperature sintering (>1200 DEG C) can be avoided; energy is saved, the method is simple, the cost is low, special instruments and equipment are not needed, and large-scale preparation is easy to realize.

To manufacture a ceramic thin film metalization substrate improved in cost performance.SOLUTION: A method for manufacturing a substrate in which a thin film metalization 4 consists of an adhesive layer, a barrier layer and a surface layer and a ceramic substrate 5 is an aluminum nitride substrate includes the steps of: coating the ceramic substrate with an ultraviolet curable resist 7; performing prebake at a temperature of 60°C or higher to 90°C or lower and for a time of 70 sec or longer to 120 sec or shorter; performing primary exposure with an integrated irradiation amount of 10 mJ / cm2 or more to 50 mJ / cm2 or less; performing inversion bake at a temperature of 110°C or higher to 140°C or lower and for a time of 40 sec or longer to 90 sec or shorter; performing secondary exposure with an integrated irradiation amount of 260 mJ / cm2 or more to 350 mJ / cm2 or less; performing development with a developer; forming the thin film metalization; and peeling the resist with a peeling solution and forming a pattern circuit.SELECTED DRAWING: Figure 5

The invention discloses a self-supporting stackable multilayer ceramic thin film capacitor, which relates to the technical field of ceramic thin film capacitors, and is prepared by a preparation method comprising the following steps: S1, selecting a substrate; step S2, preparing a Sr3Al2O6 sacrificial layer; step S3, preparation of an MLFC precursor solution; step S4, preparing an MLFC (mixed liquid fuel cell); s5, carrying out electrode sputtering; s6, dissolving the sacrificial layer and the acrylic resin adhesive; and step S7, preparing the multi-layer MLFC. The self-supporting stackable multilayer ceramic film capacitor disclosed by the invention is low in dielectric loss and large in capacitance.

The invention relates to a piezoelectric sensing composite material, and discloses a flexible piezoelectric ceramic film material and a preparation method thereof. The flexible piezoelectric ceramic film material is prepared from the following raw materials in parts by weight through blending and hot pressing: 100 parts of lead-free piezoelectric ceramic powder, 120-200 parts of flexible high-molecular polymer and 5-20 parts of conductive nano powder. The flexible high-molecular polymer and the conductive nano powder are added into the lead-free piezoelectric ceramic material to serve as main raw materials, and the flexible piezoelectric ceramic thin film material with high flexibility and high piezoelectric characteristics can be obtained by regulating and controlling the component proportion and hot pressing process parameters; and meanwhile, the flexible piezoelectric ceramic film material has the characteristics of lightness, thinness and large bending strain, and is very suitable for being adhered and compounded with various materials to capture and convert piezoelectric signals.

The application provides a flexible capacitive sensor based on air gap electric field modulation, and belongs to the field of capacitive sensor design. The flexible capacitive sensor is formed by bonding a flexible interdigital electrode film and a high dielectric constant fragile film encapsulated in an elastomer. The interdigital electrode film is an interdigital conductive electrode on a flexible substrate, and the high dielectric constant fragile film is a high dielectric constant inorganic ceramic film with random cracks after pretreatment. When the sensor is bent forward or reversely, the air gap between the crack high dielectric constant fragments reversibly expands or closes, causing the change of the internal electric field distribution and the equivalent dielectric constant of the dielectric layer, and further causing the change of the capacitance value. The measurement of the capacitance change can accurately characterize the bending curvature and direction of the measured object. The application has simple structure, high sensitivity, robustness and stability, can be directly attached to soft robots, wearable devices and curved structure surfaces, and is used for curvature monitoring, posture sensing and human-computer interaction scenes, and has wide application prospect.