100 results about "Beryllium oxide" patented technology

The present invention relates to the technical field of inorganic materials, and particularly to a method for clean smelting of beryllium oxide and beryllium oxide. The smelting method includes using iron powder to remove trivalent iron in the acid leaching solution of beryllium ore; using a non-saponified extraction system without sodium ions and ammonium cations, and the non-saponified extraction system exchanges hydrogen ions with itself when extracting beryllium ions. The present invention solves the problems existing in beryllium smelting preparation in the prior art, such as low beryllium recovery rate, easy interference by associated elements, large pollution, and difficult waste liquid treatment. An alkaline earth metal compound is used as a raffinate impurity removal reagent and a non-saponified extraction system, and the raffinate after impurity removal is recycled for beryllium ore leaching, improving the beryllium recovery rate and reducing the environmental pollution caused by waste liquid discharge.

The invention discloses a high-thermal-conductivity aluminum oxide ceramic material and a new energy battery cover plate. The material comprises the following raw materials in parts by weight: 80-85 parts of aluminum oxide; 10 to 15 parts of zirconium oxide; 2-5 parts of a heat-conducting toughening agent; 5-10 parts of a beryllium oxide coated one-dimensional carbon material; wherein the heat conduction toughening agent comprises silica gel particles and graphitized carbon. According to the high-thermal-conductivity aluminum oxide ceramic material, on one hand, a one-dimensional carbon material is coated with beryllium oxide to form a network structure, and super-strong mechanical properties are provided for the material; and on the other hand, the heat conduction toughening agent is added, and the heat conduction toughening agent comprises graphitized carbon, silica gel particles and high polymers, so that the toughness, the strength and the heat conduction performance of the material are remarkably improved, and the requirements of the new energy battery cover plate can be met.

The invention relates to a porous beryllium oxide ceramic and a preparation method thereof, belongs to the technical field of porous ceramics, and aims to solve at least one of the problems that the porous beryllium oxide ceramic prepared by the existing method is low in porosity, low in strength, high in sintering process difficulty, easy to cause powder aggregation, poor in forming and the like. According to the invention, the nano beryllium oxide, the nano magnesium oxide, the nano aluminum silicate, the polyvinyl butyral, the sesbania powder and the absolute ethyl alcohol are combined according to a specific proportion, and the substances have a synergistic effect, so that the porosity, the strength and other properties of the porous beryllium oxide ceramic are improved. According to the invention, through elaborately designed component combination and a synergistic effect mechanism, comprehensive improvement of the performance of the porous beryllium oxide ceramic is realized, and a wider prospect is opened up for research, development and application of a ceramic material.

The invention relates to ceramic slurry, a ceramic substrate and a preparation method thereof, and belongs to the technical field of ceramic materials. The ceramic slurry provided by the invention comprises the following components in parts by weight: 85-90 parts of aluminum oxide powder, 6-15 parts of heat-conducting powder, 1-7 parts of a plasticizer, 3-9 parts of a sintering aid, 2-6 parts of a dispersing agent, 2-5 parts of a viscosity modifier and 10-15 parts of a solvent, the heat-conducting powder comprises aluminum nitride, zirconium oxide and beryllium oxide; the sintering aid is prepared from TiN, ZrO2 and CaC2. According to the invention, the heat-conducting powder and the sintering aid are added into the ceramic slurry, and are reasonably proportioned with other components, so that the high-heat-conductivity and high-strength ceramic substrate is obtained.

The invention provides a method for preparing a high-performance beryllium-aluminum alloy through an in-situ growth method, and relates to the technical field of beryllium-aluminum alloys. The method comprises the following steps: vacuumizing to a target vacuum degree; heating the crucible at a first heating rate until the beryllium raw material begins to melt, then stopping vacuumizing, continuously heating to a first target temperature, stirring and melting down for a preset time after all the raw materials are completely melted, then introducing air until the pressure in the furnace is increased by 10Pa, then stopping stirring and reacting for 15-20 minutes, so as to obtain a melt; a casting mold is arranged to be heated to a second target temperature at a second heating rate, then the melt is poured into the casting mold, and a cast ingot is obtained through air cooling; and turning the cast ingot to remove an oxide layer on the surface of the cast ingot to obtain the target beryllium-aluminum alloy. According to the method, a certain amount of air is introduced in the vacuum melting process to increase the oxygen content in a furnace, so that beryllium in molten liquid generates a certain amount of beryllium oxide, and the beryllium oxide serves as a strengthening phase of beryllium to enhance the strength and elastic modulus of the beryllium aluminum alloy.

The invention discloses a small liquid-solid dual-fuel molten salt reactor core loaded with a cross spiral fuel, and relates to the technical field of nuclear reactor engineering. The reactor core of the small liquid-solid dual-fuel fused salt reactor loaded with the cross spiral fuel comprises two parts, namely an active area and a control drum, the control drum comprises a reflecting layer and a control drum absorbing material, the reflecting layer is made of beryllium oxide, and the control drum absorbing material is boron carbide with the boron 10 enrichment degree of 100%; the active area is composed of a fuel element and a fluoride salt coolant, and the whole active area is packaged in a shell made of Zr-4; the fuel element is in a cross spiral shape and is arranged in a regular hexagon shape, the fuel element is composed of an axial reflecting layer, fuel, a He cavity and an Re absorber, and the fuel is UC solid fuel with the U-235 enrichment degree being 45.684 wt.%; the material of the fluoride salt coolant is 7LiF-KF-UF4 (49.55 to 49.55 to 0.9 mol%), wherein the enrichment degree of U-235 in the UF4 is 30 percent by weight. According to the invention, the reactor core power density is further improved and the fuel peak temperature is effectively reduced while the reactor core heat is ensured to be discharged in time.

The invention provides a preparation method of monodisperse nano beryllium oxide, which comprises the following steps: (S1) uniformly mixing urea and a formaldehyde aqueous solution, adjusting the pH value to alkalescence by using organic amine, and adding (methyl) acrylic acid hydroxyl alkyl ester, (methyl) acrylic acid C12-16 alkyl ester and polyethylene glycol diacrylate to obtain a premixed solution; (S2) adding water-soluble beryllium salt into the premixed solution, adding a water-soluble initiator in an inert atmosphere, and slowly heating to 60-80 DEG C for reaction to obtain a gel precursor; and (S3) drying the gel precursor, calcining, washing and filtering to obtain the monodisperse nano beryllium oxide. The method is simple in process and low in cost, and the obtained beryllium oxide is nanoscale and monodisperse in particle size.

The invention belongs to the technical field of slurry, and relates to application of beryllium oxide in slurry development. The invention provides application of beryllium oxide in slurry development, the slurry comprises glass powder and a carrier, and a preparation method of the carrier comprises the following steps: mixing beryllium oxide and an additive according to a mass ratio of 1: (1.5-2), and blending in a mixer for 2-6 hours to obtain the carrier; the additive is prepared from polyamide, isooctyl alcohol, polydimethylsiloxane and terpilenol. Due to the interaction and synergistic effect of the components, the slurry can still keep stable performance under extreme conditions, and can resist corrosion of corrosive substances, so that the stability and reliability of electronic devices are improved.

The invention belongs to the technical field of electrode paste, and relates to stainless steel silver platinum electrode paste and a preparation method and application thereof. The stainless steel silver platinum electrode slurry provided by the invention comprises composite conductive powder, modified composite conductive powder, glass powder, an inorganic carrier and a solvent, wherein the composite conductive powder is composed of stainless steel powder, silver powder and platinum powder; the preparation method of the modified composite conductive powder comprises the following steps: adding a mixture of stainless steel powder, silver powder and platinum powder into a mixture of carboxymethyl cellulose, N-(beta-aminoethyl)-gamma-aminopropyltrimethoxysilane and polyvinyl alcohol, ultrasonically dispersing uniformly, reacting for 4-6 hours at the temperature of 100-110 DEG C, cleaning and drying, thereby obtaining the modified composite conductive powder. The glass powder is prepared from SiO2, H3BO3, Al2O3, CuO and IrO2; the inorganic carrier is zirconium oxide or beryllium oxide; the solvent is absolute ethyl alcohol or diisooctyl ether. The conductivity and the stability of the electrode paste are remarkably improved.

A composition of the supplementary cementitious material (SCM) is, on a dry basis, iron silicate having the chemical formula 2FeO·x SiO2, where x is 1.05-2.1, the iron silicate being the balance of the SCM; 0-4% by weight of aluminum comprised in aluminum-containing compounds, preferably 2-4% by weight, and 0-7% by weight of chain breaking elements, wherein the chain breaking elements are selected from the group consisting of calcium oxide (CaO), magnesium oxide, (MgO), sodium oxide (Na2O), barium oxide (BaO), strontium oxide (SrO), manganese (II) oxide (MnO), zinc oxide (ZnO), beryllium oxide (BeO), or any combination thereof; 0-4% by weight of trace elements and / or naturally occurring impurities. The SCM has an amorphous content of at least 95% by weight.

The invention discloses a preparation method for a large beryllium oxide structural member, and belongs to the technical field of production processes of electronic functional ceramic materials. According to the preparation method for the large beryllium oxide structural part, the large beryllium oxide structural part can be produced, the internal stress of a green body can be effectively reduced in the production process, and then the ceramic sintering cracking risk is reduced. The preparation method comprises the following steps: dispersing and slurrying beryllium oxide powder, granulating and screening beryllium oxide slurry, and preparing a large-scale beryllium oxide structural part blank from qualified beryllium oxide granules in a cold isostatic pressing manner; and the large beryllium oxide structural part blank is subjected to segmented sintering forming in a kiln at least in three heating temperature sections with the heating rates gradually reduced. Wherein the beryllium oxide powder is dispersed by adopting a UP circulating stirring mill, and 0.3% of a magnesium and silicon eutectic mixture is added before stirring. In the forming process, only particles screened by 60-40 meshes and 40-20 meshes are selected to be mixed with slurry according to the proportion of 1: (3-5) to serve as a forming raw material.

The utility model discloses a film-coated cover plate capable of adjusting optical performance and a smart phone display screen, the film-coated cover plate capable of adjusting optical performance comprises a glass cover plate, and an aluminum oxynitride layer, a beryllium oxide layer and a bismuth trioxide layer which are arranged on the upper surface of the glass cover plate in sequence from bottom to top, the thickness of the aluminum oxynitride layer is 20nm-30nm, and the thickness of the beryllium oxide layer is 20nm-30nm. The thickness of the beryllium oxide layer ranges from 30 nm to 40 nm, and the thickness of the bismuth trioxide layer ranges from 10 nm to 20 nm. And the aluminum oxynitride layer is used as an adhesion layer, so that the adhesion between the subsequent plating layer and the glass cover plate can be enhanced. The bismuth trioxide layer serves as the outermost layer, possibly has specific optical and electrical properties and can be used for adjusting the optical performance of the coating layer, such as increasing the light transmittance and the refractive index, so that the optical performance of the coating layer is adjustable, and the competitiveness of the product is improved.

The invention belongs to the technical field of nuclear reactor cores, and particularly relates to a fast thermal coupling metal hydride reactor core controlled by a rotating drum and a rotating drum control method, and the reactor core comprises the rotating drum, a reactor core active area, a coolant flow channel, a beryllium oxide reflecting layer and a thermal insulation shielding layer; the coolant flow channel is composed of a coolant flow channel inner barrel and a coolant flow channel outer barrel; the reactor core active area is wrapped by the coolant flow channel inner barrel, and oxide fuel rods and metal hydride fuel rods are arranged in the reactor core active area; the beryllium oxide reflecting layer is arranged on the coolant flow channel outer barrel in a sleeving manner, and the heat preservation shielding layer is arranged on the beryllium oxide reflecting layer in a sleeving manner; a plurality of rotating drums are arranged between the beryllium oxide reflecting layer and the heat preservation shielding layer in the circumferential direction. The oxide fuel rods and the metal hydride fuel rods are arranged in the reactor core active area at the same time, so that the fast thermal coupling design of a reactor core neutron energy spectrum is realized, and the reactivity control value of the rotating drum is improved.

An electrically drivable motor for use in an aircraft, the motor comprises a motor coil 110 with coil windings; elongate thermally conductive members 120 arranged to thermally communicate with the coil windings; and a thermally conductive portion arranged to thermally communicate with the elongate thermally conductive members. A portion of the elongate thermally conductive members abuts a portion of the coil windings. Each of the elongate thermally conductive members has an in use thermal conductivity of at least 100 Wm-1K-1 and an electrical conductivity of less than 10-14 Sm-l. This could be for example a sapphire, diamond, aluminum nitride, alumina or beryllium oxide. The elongate thermally conductive members may be connected to the coil windings via laser ablation or a sol-gel process. The thermally conductive members may be in the form of plates or cables. The elongate thermally conductive members may be interleaved with the coil windings. The motor may be used in an aircraft propulsion system which uses cryogen for energy generation as well as for providing heat exchange to the thermally conductive portion or elongate thermally conductive members, aiding cooling of the windings.

The application relates to the field of ceramic materials, and particularly discloses high-thermal-conductivity alumina ceramics and a preparation process thereof. The high-thermal-conductivity alumina ceramics are prepared from 50-70 parts of alumina powder, 40-50 parts of alumina fiber, 8-15 parts of a sintering aid, 0.7-1.5 parts of a dispersant and 0.2-0.3 parts of a binder, wherein the sintering aid is beryllium-zirconium composite fiber. The high-thermal-conductivity alumina ceramics have excellent thermal conductivity and mechanical properties, and have important application prospects in the field of heat dissipation of high-performance electronic devices. In addition, the preparation process can reduce the sintering temperature of the alumina ceramics, form a more uniform and refined grain system in the alumina ceramics, and significantly improve the thermal conductivity of the alumina ceramics.

The invention belongs to the technical field of porous ceramic manufacturing, and particularly relates to a preparation method of a porous beryllium oxide ceramic chip. Granular polymer modified polyvinyl acetal with a specific particle size of 5-8 [mu] m is prepared through specific monomers and a monomer ratio, then beryllium oxide powder, a sintering aid and the polymer modified polyvinyl acetal are subjected to ball milling, then cold isostatic pressing molding is performed, the polymer modified polyvinyl acetal is subjected to ball milling and serves as an adhesive and a pore-forming agent at the same time, and the porous beryllium oxide is obtained. Sintering is carried out after molding, a large number of uniform pore structures are formed in the sintering process, excellent electrical properties are provided, and good mechanical properties are kept.

The invention belongs to the technical field of beryllium oxide processing, and particularly relates to an energy-saving beryllium oxide processing device which comprises a supporting frame, a discharging hopper is installed in the middle of the supporting frame, a drying cylinder is installed at the top of the discharging hopper, and a sealing head is installed at the top of the drying cylinder. And an injection mechanism is rotationally mounted at the top of the sealing head, a driving motor for driving the injection mechanism to be rotationally connected is mounted at the top of the supporting frame, and a feeding mechanism is mounted at the top of the supporting frame. The cleaning mechanism moves on the surface of the inner wall of the drying cylinder, materials which are not dried completely can be prevented from adhering to the inner wall of the drying cylinder to cause the wall hanging phenomenon, after the water content of slurry is stable, the cleaning mechanism moves downwards to reset, scraping cleaning action is formed on the inner wall of the drying cylinder, and stripped wet materials make contact with hot air to be dried again. The device not only avoids the unstable drying phenomenon caused by the change of the water content of the slurry, but also can reduce the heat loss and lower the equipment operation cost.

The invention provides a paint, a coating and a preparation method thereof. The coating comprises a non-metal filler, a metal filler, glaze and a dispersing agent, wherein the metal filler comprises at least one of nickel, chromium, manganese and titanium; the glaze comprises at least one of silicon oxide and aluminum oxide, at least one of boron oxide, sodium oxide and zirconium oxide, and beryllium oxide. The metal filler comprises at least one of nickel, chromium, manganese and titanium, the bonding performance between the metal filler and the metal matrix is high, and a coating prepared from the coating can be firmly bonded with the metal matrix (such as stainless steel). And due to the composition of the glaze, the coating has excellent moisture resistance and corrosion resistance, so that the coating can keep excellent performance in a severe environment, and the thermal shock resistance of the coating is enhanced.

The invention provides a lithium-cobalt co-doped nickel oxide-based ceramic material and a preparation method thereof. The lithium-cobalt co-doped nickel oxide-based ceramic material comprises the following components: 40-60 parts of nickel oxide, 8-15 parts of lithium chloride, 5-10 parts of cobalt oxide, 1-5 parts of neodymium oxide, 3-8 parts of silicon dioxide, 3-8 parts of aluminum oxide, 0.5-3 parts of beryllium oxide, 1-5 parts of nano ceramic powder, 0.5-3 parts of manganese dioxide, 0.5-3 parts of vanadium oxide, 0.5-3 parts of lanthanum oxide and 0.5-3 parts of cerium oxide. By optimizing the proportion of all the components, the problems of uneven sintering, product performance fluctuation and the like possibly occurring in a traditional process are solved, and the production efficiency and the product consistency, dielectric constant, thermal stability, mechanical strength and other performance are improved.

Provided in the present invention is a preparation method for monodisperse nanometer beryllium oxide, comprising the following steps: (S1) uniformly mixing urea and an aqueous formaldehyde solution, adjusting the pH with an organic amine to be weakly alkaline, and adding hydroxyalkyl (meth)acrylate, C12-16 alkyl (meth)acrylate and polyethylene glycol diacrylate to obtain a premix; (S2) adding a water-soluble beryllium salt to the premix, and under an inert atmosphere, adding a water-soluble initiator and slowly raising the temperature to 60-80°C for reaction to obtain a gel precursor; and (S3) after the gel precursor is dried, calcining same, washing same, and filtering same to obtain monodisperse nanometer beryllium oxide. The present invention involves a simple process and low costs, and the obtained beryllium oxide is nanoscale and has a monodisperse particle size.

The invention relates to the technical field of nuclear fuel, in particular to beryllium oxide-based nuclear fuel dressing particles and a preparation method thereof. The nuclear fuel dressing particle comprises a nuclear fuel particle and a beryllium oxide layer located on the periphery of the nuclear fuel particle. The nuclear fuel particle comprises a fuel core, a loose pyrolytic carbon layer, an inner compact pyrolytic carbon layer and a carbide layer which are sequentially arranged from inside to outside. According to the nuclear fuel dressing particle, beryllium oxide is coated on the surface of the nuclear fuel particle, so that the problem that the nuclear fuel particle and a beryllium oxide powder material cannot be uniformly mixed due to large density difference is solved, and the distribution uniformity of the nuclear fuel particle in a beryllium oxide matrix material is remarkably improved; and the serious problems of particle breakage, even failure and the like caused by direct contact of the nuclear fuel particles under high pressure in the compression molding process can be effectively avoided, and the safety of the nuclear fuel particles is greatly improved.

A method for forming an integrated resistance heater. The method includes the steps of: applying a metal layer in a pattern onto a beryllium oxide ceramic body, wherein the pattern of the metal layer is connected to a conductor; forming a pre-assembly by bringing a first surface of a substrate into contact with the metal layer so that the substrate is aligned with the ceramic body, wherein the substrate includes ceramic; and forming a heating element by heating the pre-assembly to a bonding temperature of 800°C to 1900°C to bond the substrate to the ceramic body, wherein the pattern maintains integrity when forming the heating element. The metal layer contains 10% to 100% by weight of niobium.

The present invention relates to the field of inorganic materials technology, and in particular to a method for separating metallic beryllium from the cathode product of a fluoride molten salt electrolysis reaction. The method comprises: adding a refluxing agent to the cathode electrolysis product of the fluoride molten salt electrolysis reaction and remelting the product to obtain agglomerated metallic beryllium; the melting density of the refluxing agent is greater than the density of the metallic beryllium, and the melting point of the refluxing agent is less than the melting point of the metallic beryllium. The addition of the refluxing agent during remelting improves the separation of elemental beryllium and entrained molten salt in the cathode electrolysis product during remelting, thereby resolving the problems of the prior art of preparing metallic beryllium by electrolyzing beryllium oxide in fluoride molten salts, such as the difficulty in separating beryllium and molten salt, and the low purity of the finished beryllium product.

The present invention belongs to the technical field of metallurgical separation and purification, and relates to a beryllium ore smelting process based on a medium and high frequency induction furnace, which comprises the following steps: A. Crushing: Mixing beryllium ore and a flux and then performing crushing, and controlling the particle size of the crushed mixed material to be between 1 mm and 250 mm; B. Batching: Adding a conductive agent to the mixed material, mixing evenly, adding it to the medium and high frequency induction furnace, and introducing nitrogen for smelting, and controlling the frequency of the medium and high frequency induction furnace to be between 4500 Hz and 20000 Hz. The method for smelting beryllium ore by using a medium and high frequency induction furnace proposed by the present invention reduces power consumption and water consumption, and the number of furnace treatments of the crucible is increased by more than 30%; the conversion rate of beryllium in the furnace charge is increased, the conversion rate of beryllium exceeds 99%, and the comprehensive recovery rate of beryllium is increased by more than 12% compared with the conventional sulfuric acid method for beryllium smelting, and the quality requirement of preparing a high-purity beryllium oxide product without adding a purification step for beryllium oxide is successfully achieved.

The invention relates to the technical field of thermal interface materials, in particular to heat-conducting gel based on Cu-based core-shell structure heat-conducting filler and a preparation method of the heat-conducting gel. The component of the heat-conducting gel comprises a heat-conducting filler with a Cu-based core-shell structure, and the core-shell structure of particles in the heat-conducting filler is as follows: copper particles are used as cores, and a high-heat-conductivity compound is used as a shell; the high-thermal-conductivity compound is aluminum nitride, beryllium oxide, aluminum oxide, boron nitride, silicon carbide, zinc oxide, silicon nitride or magnesium oxide. The preparation method of the heat-conducting gel based on the Cu-based core-shell structure heat-conducting filler comprises the following steps: mixing the polymer matrix, the heat-conducting filler and the cross-linking agent in a heating state according to the formula ratio; after cooling, adding a catalyst and mixing; and carrying out vacuum defoaming to obtain the heat-conducting gel. The nano-copper particles with shells with high heat-conducting property are used as the heat-conducting filler, so that the high heat-conducting property of copper can be exerted, the insulativity and oxidation resistance of the heat-conducting filler can be ensured, and the heat-conducting gel has excellent electric conductivity.

The utility model provides a transmission window and a reflection type X-ray tube, the transmission window comprises a beryllium window sheet and a graphene film layer, the beryllium window sheet is a sheet comprising an upper surface and a lower surface which are opposite to each other, and the graphene film layer covers the upper surface and the lower surface of the beryllium window sheet. According to the utility model, the graphene film layer covers the surface of the beryllium window sheet, the air leakage probability of the transmission window when the beryllium window sheet is thin is reduced by using the characteristics of high heat conductivity, high strength, high air tightness, good ray permeability and low manufacturing cost of the beryllium window sheet, the product yield of sealing of the transmission window is improved, the manufacturing cost of the transmission window is reduced, and the production cost of the transmission window is reduced. The mechanical strength, the heat dissipation characteristic and the working reliability of the transmission window are also improved; in addition, through covering of the graphene film layer on the surface of the beryllium window sheet, harmless treatment of the beryllium window sheet is realized, the potential personnel poisoning risk caused by leakage of highly toxic beryllium oxide on the surface of the beryllium window sheet is eliminated, and the production safety is improved.

The invention belongs to the technical field of semiconductor devices, and particularly relates to a transistor with an improved self-heating effect and a preparation method thereof, and the method specifically comprises the steps: selecting a silicon substrate, and preparing a beryllium oxide heat dissipation layer on the silicon substrate through atomic layer deposition; performing atomic layer deposition on the beryllium oxide heat dissipation layer to prepare an indium oxide channel layer; etching two ends of the indium oxide channel layer to obtain a channel region, wherein a middle non-etched region is a non-channel region; preparing a source electrode and a drain electrode on the channel region; preparing a hafnium oxide gate dielectric layer on the source and drain electrodes and the non-channel region through atomic layer deposition; preparing a top gate electrode on the hafnium oxide gate dielectric layer; and annealing in an oxygen atmosphere. And the beryllium oxide material with high thermal conductivity is introduced as the heat dissipation substrate, so that the stability of the device is improved, the device can normally work under higher working voltage or working current, and the reliability of the transistor is improved.

The invention provides a preparation method of an infrared wavelength selective emitter and the infrared wavelength selective emitter, and the method can comprise the steps: a beryllium oxide layer preparation step: preparing a beryllium oxide layer with a first specified thickness on a substrate, and obtaining a current multi-layer thin film; a first all-dielectric layer preparation step: preparing a first all-dielectric layer on the current multi-layer thin film to obtain an updated current multi-layer thin film; a second all-dielectric layer preparation step: preparing a second all-dielectric layer on the current multi-layer thin film to obtain an updated current multi-layer thin film; and repeating the first all-dielectric layer preparation step and the second all-dielectric layer preparation step to form the first all-dielectric layer and the second all-dielectric layer which are alternately stacked until the thickness of the current multi-layer thin film reaches the set thickness, and obtaining the target infrared wavelength selective emitter. By means of the method, infrared selection can be achieved under the condition that the high-temperature-resistant and oxidation-resistant capacity is high.

The invention belongs to the field of heating paste, and particularly relates to heating paste adaptive to a glass substrate atomizing core, which comprises the following components in parts by weight: 5-35 parts of dispersion, 50-105 parts of metal powder, 0.5-10 parts of glass powder and 0.1-15 parts of auxiliaries, wherein the dispersion comprises an organic solvent and resin; the metal powder comprises silver powder and palladium powder; the glass powder is borosilicate glass powder with the softening point of 600-700 DEG C; the auxiliary agent comprises at least one of mullite, zirconium dioxide or beryllium oxide. The invention further comprises preparation of the heating slurry and application of the heating slurry in an electronic cigarette and an atomizing core of the electronic cigarette. According to the invention, through combined control of components and proportions in the slurry, synergism can be realized, so that the heating slurry has high thermal stability, stable physical and chemical properties at high temperature and no release of harmful substances, and can perfectly cover a glass substrate and accord with the thermal expansion coefficient of the glass substrate; and the heating efficiency is high under the condition of low power.