192 results about "Barium oxide" patented technology

The invention relates to the technical field of thermal insulation materials, and discloses a hollow glass bead as well as a preparation method and application thereof. The hollow glass beads are prepared from the following components in percentage by weight: 40 to 65 percent of silicon dioxide, 5 to 15 percent of boron oxide, 5 to 15 percent of sodium oxide, 2 to 8 percent of cuprous oxide, 1 to 5 percent of barium oxide, 2 to 10 percent of chromic oxide, 3.5 to 7.5 percent of nickel oxide, 1.5 to 3 percent of tin oxide and 1 to 5.5 percent of silicon carbide. Cuprous oxide, barium oxide and chromic oxide have high reflection coefficients, and heat absorption of buildings can be reduced; nickel oxide, tin oxide and silicon carbide have high radiation coefficients, heat can be dissipated into outdoor air in an infrared radiation mode, and therefore the temperature of the outer surface of a building is reduced. Cuprous oxide can significantly improve the surface cleanliness of the coating and enhance the thermal insulation performance of the coating.

The invention discloses a radiation refrigeration coating and a preparation method thereof. The radiation refrigeration coating comprises a first filler and a second filler, the mass ratio of the first filler to the second filler is (1-3): (1-5), and the first filler comprises the following components in percentage by weight: 50-70% of a polyurethane emulsion, 10-15% of a silane coupling agent, 8-10% of multi-mesoporous nano-silica and 5-8% of talcum powder; the second filler comprises the following components in percentage by weight: 60%-70% of polyethylene glycol, 10%-15% of a dispersing agent and 5%-8% of nano barium oxide; 5%-8% of tannic acid; 3%-5% of nano silver; the viscosity of the polyurethane emulsion ranges from 300 cps to 800 cps. The radiation refrigeration coating disclosed by the invention has the advantages that a refrigeration film has larger infrared radiation refrigeration capacity in an atmospheric window, better ultraviolet light absorption capacity and long service life.

The embodiment of the invention discloses a preparation method of a europium-barium-copper oxide superconducting sputtering target material, which comprises the following steps: mixing europium oxide powder, barium carbonate powder and barium oxide powder according to a set proportion, and then mixing with a dispersing agent and water to obtain first europium-barium-copper oxide slurry; carrying out spray granulation on the first europium-barium-copper oxide slurry to obtain first mixed powder; calcining the first mixed powder, and mixing the calcined first mixed powder with a dispersant, a binder and water to obtain second europium barium copper oxide slurry; performing spray granulation on the second europium-barium-copper oxide slurry to obtain second mixed powder; carrying out compression molding-cold isostatic pressing on the second mixed powder to obtain a europium-barium-copper oxide target material biscuit; wherein the mold pressing pressure ranges from 3 MPa to 6 MPa, and the cold isostatic pressing pressure ranges from 100 MPa to 250 MPa; the europium-barium-copper oxide target material biscuit is subjected to degreasing and sintering integrated treatment, and the europium-barium-copper oxide superconducting sputtering target material is obtained; the relative density of the europium barium copper oxide superconducting sputtering target material is as high as 97.98%, and the bulk resistivity is as low as 1.98 m omega.cm.

The invention relates to high-strength microcrystalline glass and a preparation method thereof, and belongs to the technical field of composite materials. The high-strength glass ceramic is prepared from cullet, titanium dioxide, spodumene, potassium carbonate, lanthanum oxide, boron nitride, barium oxide, zirconium oxide and modified carbon fibers as raw materials, and the invention further discloses a formula of the raw materials. According to the high-strength glass ceramic, the modified carbon fibers serve as a reinforcing phase, the problem that the glass ceramic has brittleness and is prone to breakage is solved, the modified carbon fibers and a glass ceramic base material are good in phase property, and therefore the prepared glass ceramic is excellent in mechanical performance, the highest impact toughness can reach 3.91 KJ / cm < 3 >, the highest compressive strength can reach 371.28 MPa, and the glass ceramic can be used as a high-strength glass ceramic. The breaking strength can reach 46.93 MPa to the maximum, and in addition, the modified carbon fiber can also improve the thermal stability of the microcrystalline glass and solve the yield influence caused by thermal stress.

Technologies for a field effect transistor (FET) with a ferroelectric gate dielectric are disclosed. In an illustrative embodiment, a transistor includes a gate of strontium ruthenate and a ferroelectric gate dielectric layer of barium titanate. In order to prevent migration of ruthenium from the strontium ruthenate to the barium titanate, a barrier layer is placed between the gate and the ferroelectric gate dielectric layer. The barrier layer may be a metal oxide, such as strontium oxide, barium oxide, zirconium oxide, etc.

The present invention relates to the technical field of preparation of barium hydroxide, and specifically to a process for preparing barium hydroxide octahydrate, comprising the following steps: (1) crushing a raw material of witherite, uniformly mixing the crushed witherite with coal powder, charcoal and silicon dioxide, calcining and keeping warm to obtain crude barium oxide; (2) dispersing the crude barium oxide in water, filtering and washing the residue with deionized water, desulfurizing the obtained filtrate with a desulfurizer, filtering and washing to obtain a barium hydroxide solution, and concentrating, cooling, crystallizing, centrifuging and drying to obtain the barium hydroxide solution. The purpose of the present invention is to provide a process for preparing barium hydroxide octahydrate, aiming to improve the total leaching rate of barium and the purity of the product.

The invention discloses a cooling anti-radiation coating and a preparation method thereof. The cooling anti-radiation coating comprises a surface coating, a middle coating and a bottom coating, the surface coating comprises the following components in percentage by weight: 40-60% of polyethylene, 1-5% of carbon nanotubes, 1-5% of graphene oxide, 10-15% of a dispersant, 5-8% of polyethylene glycol, 3-8% of nano barium oxide and 3-10% of nano boron nitride. The intermediate coating comprises the following components in percentage by weight: 50%-70% of polyurethane, 20%-30% of a silane coupling agent and 5%-10% of aluminum oxide; the bottom coating comprises the following components in percentage by weight: 70%-80% of resin, 7%-9% of talcum powder, 2%-4% of aluminum oxide and 3%-10% of hydroxyethyl cellulose. The cooling anti-radiation coating formed by the synergistic cooperation of the components has high electromagnetic shielding performance and long service life.

The present invention generally relates to a process of fabricating an asymmetric supercapacitors device comprising synthesizing a BaO and CeO2 thin film as a first electrode using a one-step successive ionic layer adsorption and reaction (SILAR) method for uniform deposition and adhesion on a conductive substrate; synthesizing an activated carbon (AC) electrode as a second electrode; formulating a solid-state electrolyte layer comprising polyvinyl alcohol (PVA) and potassium hydroxide (KOH), wherein the solid-state electrolyte layer is formed as a gel; assembling the device by layering the first electrode, the solid-state electrolyte layer, and the second electrode in a stacked configuration, wherein the assembled device is allowed to stabilize for a period of 12-24 hours at room temperature to ensure uniform distribution of the electrolyte and structural integrity; and pressing the assembled layers together to enhance contact between electrodes and the electrolyte.

The present disclosure herein discloses a skeleton supported catalyst and a method for preparing allyl alcohol polyoxyethylene ether by using the same. The skeleton supported catalyst is a catalyst loaded with barium oxide, potassium oxide, yttrium oxide within a copper skeleton. A method comprising: putting the skeleton supported catalyst into a reaction vessel, and after adding nitrogen to the reaction vessel, adding dried and dehydrated allyl alcohol or the allyl alcohol polyoxyethylene ether with low molecular weight to the reaction vessel, raising the temperature, and continuously introducing dried and dehydrated ethylene oxide for reaction; after the reaction being completed, cooling down, and filtering and discharging to obtain after the reaction being completed, cooling down, and filtering and discharging to obtain a finished product of the allyl alcohol polyoxyethylene ether. The allyl alcohol polyoxyethylene ether product prepared by the skeleton supported catalyst of the present disclosure has excellent product performance.

The invention discloses a deeply-curable zirconia-containing dental repair resin and a preparation method thereof.The preparation method comprises the steps that a double-bond-containing silane coupling agent is added into a zirconia dispersion liquid and a silicon dioxide dispersion liquid respectively, modification reaction is conducted in the stirring state, and a modified solution # imgabs0 # and a modified solution II are obtained; carrying out spray drying on the modified solution I and the modified solution II through a three-fluid spray head to obtain a zirconium oxide and silicon oxide nanocluster body; uniformly mixing and stirring the zirconium oxide and silicon oxide nanocluster with a methacrylate organic matrix and a photoinitiator; and carrying out light curing treatment on the mixture to obtain the zirconium oxide dental repair resin. The zirconium oxide dispersion liquid, the silicon dioxide dispersion liquid and the three-fluid spray head are matched, the mechanical performance is improved on the premise that the X-ray radiation resistance and the effective curing depth are guaranteed, the dependence of the industry on zinc oxide, barium oxide and strontium oxide is broken through, the problem that a zirconium oxide material cannot be deeply cured due to the high refractive index is solved, and the application prospect is good.

The invention provides a composite hydrogen transfer catalyst based on an MOFs material as well as a preparation method and application of the composite hydrogen transfer catalyst. The composite hydrogen transfer catalyst comprises the MOFs material loaded with an active metal component and solid alkali, the active metal component is selected from at least one of palladium, platinum, ruthenium, rhodium and nickel; the active metal component accounts for 0.5-5% of the mass of the catalyst; the MOFs material is selected from at least one of ZIF-8, MIL-101, UiO-66, HKUST-1 and MOF-5 (Metal Organic Frameworks); the solid alkali is selected from at least one of magnesium oxide, calcium oxide, hydroxyapatite and barium oxide. The catalyst provided by the invention has the advantages of high catalytic activity, good selectivity, strong stability, reusability and the like, can efficiently catalyze fatty alcohol to perform hydrogen transfer reaction under a lower-temperature reaction condition to prepare Guerbet alcohol, remarkably improves the yield and purity of a product, and reduces the reaction energy consumption and cost.

The invention belongs to the technical field of metallurgy, and particularly relates to a slag charge for electroslag remelting in a high-altitude and high-humidity environment and a preparation method thereof.The slag charge is prepared from 20-22% of calcium fluoride, 25-28% of aluminum oxide, 20-25% of calcium oxide, 8-10% of magnesium oxide, 8-10% of silicon dioxide, 3-8% of rare earth oxide and 1-5% of barium oxide; for high altitudes (barometric lt; 90 kPa) and high humidity (relative humidity gt; the invention provides the low-hygroscopicity, low-fluorine and environment-friendly slag charge, so that the stability of the slag pool is improved, the oxyhydrogen control is realized, and the energy consumption is reduced.

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.

Glass compositions include one or more of phosphorus oxide (P2O5), niobia (Nb2O5), titania (TiO2), potassium oxide (K2O) and lithium oxide (Li2O) as essential components and may optionally include barium oxide (BaO), zinc oxide (ZnO), V2O5 (vanadia), FeO (iron oxide) and other components.

The method comprises the following steps: (1) preparing high-temperature inorganic binding phase glass powder: heating silicon dioxide, aluminum oxide, calcium oxide, titanium oxide and barium oxide to a melting temperature, quenching, completely cooling, and crushing to obtain high-temperature inorganic binding phase glass powder; the inorganic binding phase glass powder is obtained; (2) weighing a conductive phase, a sintering framework, a catalyst and inorganic binding phase glass powder, and mechanically mixing to obtain composite powder; (3) preparing an organic carrier: uniformly mixing the additive solution with a solvent to obtain the organic carrier; and (4) preparing the copper oxide-tungsten conductive paste: mixing the composite powder with an organic carrier, grinding, and defoaming to obtain the copper oxide-tungsten conductive paste adaptive to the medium-temperature co-fired ceramic. The blank in the field of medium-temperature co-fired ceramic conductive paste is filled, and the medium-temperature co-fired ceramic conductive paste has an obvious price advantage.

The invention relates to silver-covering glass powder prepared by reductive ball milling, glass ink and a preparation method of the silver-covering glass powder and the glass ink. The silver-covering glass powder is prepared by ball-milling glass frits, a reducing medium and a reducing auxiliary agent through a reducing ball-milling process; the glass frit is prepared from the following substances in percentage by mass: 35-40% of silicon dioxide, 10-20% of boric acid, 10-20% of zinc oxide, 3-10% of calcium sulfate, 3-6% of titanium dioxide, 16-20% of carbonate, 1-3% of magnesium oxide, 1-3% of aluminum oxide and 1-3% of barium oxide. And the particle size of the silver-covering glass powder after ball milling is 5-15 [mu] m. Compared with the prior art, the reducing ball milling medium is introduced in the refining process of the glass powder and is matched with the reducing auxiliary agent to realize reduction treatment of the glass powder, the silver covering and acid resisting effects of the glass printing ink are considered, and the glass printing ink has the characteristics of low carbon, environment friendliness and simple process.

This invention relates to the field of glass-ceramic technology, specifically providing a low-temperature co-fired ceramic, its preparation method, and its application. The raw materials for the low-temperature co-fired ceramic include VSBBS glass frit and ceramic frit, with the total weight of the VSBBS glass frit and ceramic frit being 100%. The mass percentages of the VSBBS glass frit and ceramic frit are 20-40% and 60-80%, respectively. The raw materials for the VSBBS glass frit, by mass percentage, include 10-30 wt% vanadium oxide, 10-30 wt% antimony oxide, 10-30 wt% barium oxide, 10-20 wt% boron oxide, and 30-50 wt% silicon oxide, with the sum of all oxides being 100%. The LTCC material obtained by this invention achieves excellent millimeter-wave dielectric properties, with a relative permittivity between 4.8 and 6.8, a dielectric loss less than or equal to 0.001, and a flexural strength of 180-230 MPa.

Provided is an anti-counterfeiting composition for anti-counterfeiting fibers, including a carrier, an anti-counterfeiting tracer and a dispersant, wherein the anti-counterfeiting tracer is composed of barium oxide, strontium oxide, aluminum oxide and zinc oxide, and a barium element content, a strontium element content, an aluminum element content, and a zinc element content in the anti-counterfeiting composition is controlled to a fixed feeding mass ratio; in percent by mass, the sum of the barium element content, strontium element content, aluminum element content, and zinc content accounts for 5-50% of the anti-counterfeiting composition; the carrier is a matrix polymer or a bio-derived oil. The anti-counterfeiting composition of the present disclosure can give the anti-counterfeiting fiber advantages of memory tracking properties and identification functions, high anti-counterfeiting capability, and good anti-counterfeiting concealment.

The invention belongs to the technical field of radioactive waste treatment, and discloses a ceramic solidified body for synergistically solidifying radioactive iodine and cesium as well as a preparation method and application of the ceramic solidified body. The chemical formula of the ceramic solidified body is (Cs2xBa2-2x) (AgyNa1-y) IO6, x is equal to 0.1-0.9, y is equal to 0.1-0.9, and the ceramic solidified body is prepared by mixing silver iodide, barium hydroxide, sodium periodate and cesium carbonate, carrying out dry pressing molding under 20-60 MPa to obtain a rough blank, sintering at 500-700 DEG C, carrying out cold sintering at 200-300 DEG C, and finally annealing at 500-600 DEG C. The curing amount of iodine in the ceramic cured body is 2.4-20 wt%, the curing amount of cesium is 4-46 wt%, and the ceramic cured body has excellent chemical stability and is suitable for curing radioactive iodine and cesium and long-term geological treatment.

The invention relates to the technical field of OLED packaging, in particular to a method for improving the OLED packaging effect. The invention provides a method for improving the packaging effect of an OLED (Organic Light Emitting Diode), which comprises the following steps: preparing a composite film of calcium oxide and barium oxide on the surface of an OLED device, and sequentially carrying out glass laminating and packaging treatment to obtain a packaged OLED. According to the invention, the composite film of calcium oxide and barium oxide is introduced between the OLED device and the packaging structure to absorb water vapor, so that the compactness and barrier property of the packaging layer are improved, the erosion of water vapor to the OLED is effectively blocked, and the purpose of remarkably improving the packaging property and stability of the OLED is achieved. Therefore, the service life of the OLED is obviously prolonged; and the method is simple and feasible, and is suitable for large-scale production.

This application discloses a method for producing acetonitrile by amination of acetate, comprising the following steps: in a reactor, acetate, ammonia, and a catalyst are contacted and reacted to obtain acetonitrile; wherein the acetate is selected from at least one of methyl acetate, ethyl acetate, propyl acetate, butyl acetate, and cyclohexyl acetate; the catalyst is composed of a support and alkaline earth metal oxides and alkali metal oxides supported on the surface of the support; wherein the support is selected from at least one of silicon oxide, aluminum oxide, titanium oxide, and zirconium oxide; wherein the alkaline earth metal oxide is selected from at least one of magnesium oxide, calcium oxide, strontium oxide, and barium oxide; wherein the alkali metal oxide is selected from at least one of lithium oxide, sodium oxide, and potassium oxide; wherein the loading of alkaline earth metal oxide in the catalyst is 0.01–10 wt%, the loading of alkali metal oxide is 0.05–5 wt%, and the remainder is the support.

The invention discloses a cooling anti-radiation coating. The cooling anti-radiation coating comprises a surface coating, a middle coating and a bottom coating, the surface coating comprises the following components in percentage by weight: 40-60% of polyethylene, 1-5% of carbon nanotubes, 1-5% of graphene oxide, 10-15% of a dispersant, 5-8% of polyethylene glycol, 3-8% of nano barium oxide and 3-10% of nano boron nitride. The intermediate coating comprises the following components in percentage by weight: 50%-70% of polyurethane, 20%-30% of a silane coupling agent and 5%-10% of aluminum oxide; the bottom coating comprises the following components in percentage by weight: 70%-80% of resin, 7%-9% of talcum powder, 2%-4% of aluminum oxide and 3%-10% of hydroxyethyl cellulose. The cooling anti-radiation coating formed by the synergistic cooperation of the components has high electromagnetic shielding performance and long service life.

A method (100) for producing a bridge tape element (50) for a superconducting joint of rare earth barium copper oxide (REBCO) tapes, characterized in that a REBCO layer (45) is deposited by a chemical solution deposition (CSD) process on a silver substrate (10), which is made of silver or a silver alloy containing at least 75 weight% of silver, and that the CSD process includes - at least one deposition step (110), wherein a REBCO precursor solution is deposited on the silver substrate, resulting in a gel-like REBCO precursor layer (20), with the REBCO precursor solution comprising a solvent and dissolved REBCO precursor salts including organic content, and with the gel-like REBCO precursor layer containing an amorphous mixture of REBCO components including organic content, - at least one pyrolysis step (120), wherein a gel-like REBCO precursor layer is pyrolysed in a first stage heat treatment, resulting in an amorphous REBCO component layer (30) containing an amorphous mixture of REBCO components and being devoid of organic content; - at least one transformation step (130), wherein at least one amorphous REBCO component layer is transformed in a second stage heat treatment, resulting in a REBCO material layer (40) containing polycrystalline or textured REBCO.

The invention discloses a high-speed rail sound screen wall self-repairing nano coating and a preparation method thereof, and belongs to the technical field of coatings, sodium alginate is crosslinked with calcium ions in calcium chloride, gel microspheres are formed on the surface of porous shell powder, a self-repairing agent is wrapped in the gel microspheres, barium nitride is hydrated to form barium hydroxide under the excitation action of water, and the self-repairing nano coating is formed. Barium hydroxide belongs to an alkaline compound, and through the wrapping effect of the microcapsule, the corrosion effect on a modified binder in a system can be reduced, so that the material has the advantages of light weight, sound insulation, good acid and alkali resistance, washing resistance and compressive strength; polyvinyl alcohol is used as a bridge, hydroxyl of polyvinyl alcohol is combined with carboxyl of carboxymethyl chitosan and then copolymerized with vinyl acetate to form a three-dimensional network structure, cohesive force of the adhesive and adhesive force to a base material are greatly improved, calcium ions are separated out due to the alkaline effect of barium hydroxide, and meanwhile the crosslinking strength of the adhesive can be improved; the bonding strength is further improved.

This invention discloses a slab with a crystalline effect. The slab includes a blank layer, on the surface of which a glaze modifier is applied to form a glaze modifier layer. The glaze modifier comprises the following raw materials in parts by weight: 5-8 parts potassium feldspar, 4-7 parts calcined talc, 3-5 parts modified translucent stone agent, 3-5 parts calcium oxide, 2-4 parts barium oxide, 1-3 parts cobalt oxide, and 2-4 parts strontium carbonate modifier. The slab with a crystalline effect of this invention is formed by applying the glaze modifier. The glaze modifier uses potassium feldspar, calcined talc, calcium oxide, barium oxide, and cobalt oxide as a matrix. By adding strontium carbonate modifier and modified translucent stone agent, the two are synergistically enhanced, improving the crystalline effect of the product and increasing its stain resistance and easy-to-clean properties. Simultaneously, the product exhibits significant improvements in scrub resistance and alkali corrosion resistance.

This disclosure relates to systems and methods for gas mitigation. In one aspect of the disclosure, a battery is presented. The battery has a de-gassed lithium-manganese rich battery cell and a lithium-based anode packaged with a lithium-manganese-rich cathode, saturated in an electrolyte. A barium oxide-based coating is in the de-gassed lithium-manganese rich battery cell, and configured to convert oxygen and carbon dioxide into barium peroxide and carbonate and retain the barium peroxide and carbonate.

The invention discloses a high-strength low-adsorption high-silicon ceramic tea ware. A green body of the ceramic tea ware is prepared from the following raw materials in parts by weight: 70 to 72 parts of silicon dioxide, 20 to 25 parts of aluminum oxide, 1.3 to 1.8 parts of potassium oxide, 0.8 to 1.0 part of sodium oxide, 0.2 to 0.4 part of calcium oxide, 0.1 to 0.2 part of magnesium oxide, 0.5 to 1.0 part of barium oxide, 0.5 to 2.0 parts of zinc oxide and 1.0 to 3.0 parts of zirconium oxide. According to the invention, aluminum oxide can react with silicon dioxide in the sintering process to form mullite Al2O3.2SiO2 and form a K2O-Al2O3-SiO2 ternary phase diagram system, and aluminum oxide, barium oxide, zinc oxide and zirconium oxide are adopted, so that the lowest eutectic point is reduced, the toughness of a green body is enhanced, the stability and impact strength of the green body are improved, and the heat stability of the green body is high; the ceramic body can adapt to water heat exchange at 180-20 DEG C, and high strength and low adsorption performance of the ceramic body are achieved.

The invention discloses a carbon nanotube master batch, a polyethylene composite material and a preparation method and application thereof, and belongs to the technical field of high polymer materials, the carbon nanotube master batch has a core-shell structure, the core comprises a carbon nanotube and iron barium oxide, and the shell is polyethylene grafted maleic anhydride; the mass ratio of the core to the shell is 1: (0.25-5); the mass ratio of the carbon nanotubes to the iron barium oxide is (1-9): 1. According to the invention, by coating the carbon nanotubes and the iron-barium-oxygen bodies, the dispersibility of the carbon nanotubes and the iron-barium-oxygen bodies in polyethylene is effectively improved, the agglomeration phenomenon is avoided, the interface bonding force with polyethylene is improved, the carbon nanotubes and the iron-barium-oxygen bodies are taken as cores, a tough composite reinforced core is formed, external loads can be effectively absorbed and dispersed, and the tensile strength of polyethylene is improved. The strength, the self-repairing property and the scratch resistance of the composite material are improved, and the carbon nanotube master batch is suitable for the fields of aerospace, electronics and electrics, medical equipment and 5G communication.

The invention provides a lithium ion battery gas getter. The present disclosure relates to systems and methods for gas mitigation. In one aspect of the present disclosure, a battery is presented. The battery has a degassed lithium-rich manganese battery cell and a lithium-based anode encapsulated with a lithium-rich manganese cathode saturated in an electrolyte. A barium oxide-based coating is in the degassed lithium-rich manganese battery cell and is configured to convert oxygen and carbon dioxide to barium peroxide and carbonate and retain the barium peroxide and the carbonate.