140 results about "Zinc titanate" patented technology

A coating and method for overcoating a TBC on a component used in a high-temperature environment, such as the combustor section of an industrial gas turbine. The coating defines the outermost surface of the component and is formed of at least two layers having different compositions. An inner layer of the coating contains alumina in a first silica-containing matrix material that is free of zinc titanate. An outer layer of the coating contains alumina, a glass material, and zinc titanate in a second silica-containing matrix material. The outer layer of the coating has a surface roughness of not greater than three micrometers Ra and forms the outermost surface of the component. The coating reduces the component temperature by reducing the convective and radiant heat transfer thereto.

Provided is a particulate sorbent composition comprising a zinc titanate support loaded with a promoter metal in a substantially reduced valence state selected from the group consisting of cobalt, nickel, iron, manganese, copper, molybdenum, tungsten, silver, tin and vanadium, or mixtures thereof , for desulfurizing a cracked gasoline or diesel fuel feed stream in a desulfurization zone by contacting said feed stream in a desulfurization zone with a particulate adsorbent composition and then subjecting the resulting low sulfur content The stream is separated from the sulfided sorbent, which is then regenerated and activated before being recycled back to the desulfurization zone.

The invention provides compositions and methods to reduce NOx emissions from the flue gas of a fluid catalytic cracking (FCC) unit (10). The invention also provides methods for reducing CO emissions from the regenerator (2) and/or the flue of an FCC unit. The compositions (4) of the invention comprise copper and/or cobalt and a carrier. The carrier can be, for example, hydrotalcite like compounds, spinels, alumina, zinc titanate, zinc aluminate, zinc titanate/zinc aluminate, and the like.

The invention relates to a preparation method of semiconductor composite antibacterial photocatalyst containing nitrogen-doped titanium dioxide and zinc titanate, and belongs to the technical field of the treatment of environmental pollution. The semiconductor composite antibacterial photocatalyst is prepared a uniform coprecipitation method which comprises the following steps of: preparing a mixed solution in the amount-of-substance ratio of titanium sulfate to urea to zinc ions of 1:10:0; continuously mixing the mixed solution; raising the temperature of a water bath to 60 DEG C; adding a surfactant (sodium dodecyl benzene sulfonate) into the mixed solution based on the concentration of 20mg/150ml; keeping a constant temperature for 0.5h; raising the temperature to 90-100 DEG C again; keeping the temperature for 3-6h; adding ammonia water into the solution to regulate to pH (potential of hydrogen) to be 6-8; washing and drying the obtained product; and forging the product at the temperature of 400-800 DEG C. The preparation method has the advantages of short process flow, simple equipment, simple and convenient operation, and low price of raw materials. The prepared semiconductor composite has the advantages of having good dispersibility, visible spectral response and low energy consumption, and is an environment-friendly antibacterial purification material.

The invention discloses a preparation method for a high-temperature-resistance zinc titanate/silicon dioxide protection material and the protection material obtained through the method. The preparation method is characterized in that: the specific steps includes adding template polymers into solvent to obtain template polymer solution, mixing organic silicon or nanometer silicon dioxide, water and inorganic acid to obtain silicon source solution, uniformly mixing the template polymer solution and the silicon source solution to obtain spinning solution A, mixing titanium isopropoxy, zinc acetate and ethanol and adding template polymers to the mixture to obtain spinning solution B, performing electrostatic spinning for the spinning solution A and the spinning solution B to obtain a composite fiber membrane, and burning the composite fiber membrane to obtain the high-flexibility and high-temperature-resistance zinc titanate/silicon dioxide protection material. The protection material can serve as a protection material efficient-decomposition biochemical reagent under the high-temperature condition, and the decomposition ratio of paraoxon in simulation agent of the biochemical reagent is 80-95% in 10 minutes.

The present invention provides partially crystallizing lead-free and cadmium-free glass enamel composition that fuse at low temperatures. Glass enamel compositions according to the present invention form predominantly bismuth titanate and optionally zinc titanate crystals upon firing. Preferably, glass enamel compositions according to the invention include a glass component that includes by weight from about 11% to about 52% SiO2, from 10.2% to about 40% TiO2, from about 5% to about 75% Bi2O3, up to about 8% B2O3, up to about 14% BaO+SrO, and up to about 45% by weight ZnO, where the sum of Bi2O3 and ZnO comprises from about 30% to about 85% of the glass component by weight.

The invention provides a self-cleaning water-resistant paint which is composed of a modified acrylate emulsion, water, a mineral filler, a nano photocatalyst and a chemical additive, wherein the mineral filler comprises cellular quartz powder, calcined kaolin and pyrauxite; the photocatalyst comprises doped nano titanium oxide powder, doped nano zinc oxide powder, nano zinc titanate powder, nano bismuth titanate powder and graphene; and the chemical additive comprises a thickener, a waterproofing agent, a dispersing agent, a plasticizer, a defoaming agent, a preservative and a film formation assistant. Thus, the paint has the advantages of high binding force, favorable water resistance and favorable self-cleaning capacity.

The invention discloses cobalt doped niobium zinc titanate microwave dielectric ceramics and a preparation method thereof. The dielectric ceramics comprise the following component by mole percentage: (Zn1-xCox)TiNb2O8, wherein x is greater than 0 and smaller than or equal to 0.40. In the invention, ZnTiNb2O8 system microwave dielectric ceramics are adopted as the basis. A traditional oxide mixing method is employed, and Co2O3 is added for doping modification, thus obtaining the (Zn0.7Co0.3)TiNb2O8 microwave dielectric ceramic material with good comprehensive performance. The provided microwave ceramics have a relatively low sintering temperature and good comprehensive performance. When the sintering temperature is 1075DEG C, epsilon r=35.93, Q*f=35125GHz, and tau f=0ppm/DEG C. The microwave dielectric ceramics provided in the invention are mainly used in MLCC ceramic devices co-fired with base metal inner electrodes at a low temperature.

The invention discloses a production method of carbon nanofiber/zinc titanate composite for personal protection, and the composite obtained by the production method. The production method is characterized by including the steps of: adding titanium isopropoxide and zinc acetate into ethanol solvent, and adding polyvinylpyrrolidone to obtain spinning dope A; adding polyacrylonitrile into N, N-dimethyl formamide solvent to obtain spinning dope B; subjecting the spinning dope A and the spinning dope B to electrostatic spinning to obtain composite fibrous membranes; and allowing the drawn composite fibrous membranes to stand in air to be pre-oxidized, and carbonizing the membranes under nitrogen protection. The carbon nanofiber/zinc titanate composite has the advantages of light weight, high rate of biochemical disintegration, and fine mechanical properties.

A piezoelectric element comprises a piezoelectric layer and an electrode provided with the piezoelectric layer. The piezoelectric layer is made of a composite oxide containing bismuth ferrite, barium titanate, and bismuth zinc titanate.

The invention relates to a microwave dielectric ceramic material and its preparation method, particularly relates to a zinc oxide-titanium dioxide system low temperature cofired ceramic material and its preparation method. The ceramic material uses zinc titanate and titanium dioxide as main crystal phase and zinc borosilicate glass as a flux. The product can be fired with silver electrode at 900DEG C, and has frequency temperature coefficient tf of 0+-10ppm/DEG C, dielectric constant of 24~35.3, and Q*f of 13000 GHz. The material solves the process problem of casting process and material problem of production of small size multilayer ceramic dielectric microwave Filter. The LTCC technology is used to manufacture multilayer ceramic dielectric microwave Filter with high performance, small size and good consistency and multilayer products like Balun, Antenna and Coupling. The invention also discloses a preparation method for zinc oxide-titanium dioxide system low temperature cofired ceramic material.

The invention discloses a microwave dielectric ceramics doped with Co2O3 (cobalt oxide) and niobium zinc titanate and a preparation method of the microwave dielectric ceramics. The chemometry formula is (Zn1-xCox) TiNb2O8-1 wt. % BaCu (B2O5); BaCu (B2O5) is BCB for short; in the formula, x is equal to 0.32-0.38. The (Zn1-xCox) TiNb2O8-1wt. % BCB microwave dielectric ceramics with a good comprehensive performance is prepared by the step of adding Co2O3 to a ZnTiNb2O8-1wt. %BCB system microwave dielectric ceramics serving as a base by by a traditional oxide mixing method to reduce a sintering temperature. The microwave ceramics is low in sintering temperature and good in comprehensive performance; the best sintering temperature is 975 DEG C, wherein epsilon r is equal to 33.04, Q*f is equal to 22000GHz, and Tauf is equal to -2.7 ppm/DEG C. The microwave dielectric ceramics is mainly applied to MLCC (Multiplayer Ceramic Chip Capacitors) ceramics device co-fired with a base metal electrode at a low temperature, and has wide application in industries such as information, war industry, mobile communication, electronic and electrical appliances, aviation, oil exploration and the like.

The invention relates to a low-temperature sintered zinc titanate high-frequency dielectric ceramic and preparation method, wherein the ceramic comprises zinc oxide produced by decomposing one portion of basic zinc carbonate, one portion of anatase nano-TiO2 and 0.75-1.00 wt% of vanadium pentoxide and diboron trioxide additive, wherein the basic zinc carbonate is used for producing zinc oxide, the preparation comprises ball grinding, drying, grinding, forming, pre-calcination, sintering and silvering.

The invention relates to a catalyst which is relevant to zinc and titanium and a chemical method for preparing the catalyst. The zinc titanate micro-nano photocatalysis material has a spheroid structure with a plurality of protrusions. The preparation method of the zinc titanate micro-nano photocatalysis material comprises the following steps of: mixing uniform concentrated ammonia water suspension A of TiO2; slowly adding a zinc salt solution or ZnO powder into the suspension A in the titanium/zinc molar ratio of 1:1 to obtain uniform suspension B; processing the suspension B at high temperature and high pressure and then centrifugally washing the suspension B with deionized water many times to obtain a precursor C; drying the precursor C, burning at high temperature, and finally ball-milling. The prepared material has high specific surface area which reaches 160.6m2/g and has stronger visible light photocatalysis performance. The preparation method has low production cost and is suitable for scale industrial production.

The invention discloses a zinc titanate-titanium oxide composite antibacterial coating on the surface of titanium and a preparation method of the zinc titanate-titanium oxide composite antibacterial coating and belongs to the technical field of titanium-based surface treatment. The preparation method comprises the steps that a combination solution of a (CH3COO)2Zn solution and a beta-C3H7Na2O6P solution serves as an electrolyte; and a metallic titanium sheet serves as the anode, stainless steel serves as the cathode, the metallic titanium sheet and the stainless steel are placed into the electrolyte, the metallic titanium sheet is treated through a micro-arc oxidation process, and the zinc titanate-titanium oxide composite antibacterial coating is prepared on the surface of the titanium sheet. According to the preparation method, raw materials are easy to obtained, operation is easy, control is easy, and the stability is good; and the antibacterial coating prepared through the preparation method has high biological activity as well as antibacterial property, no discontinuous interface exists between the antibacterial coating and a basal body, and high combination strength is achieved.

The invention discloses a ceramic material and a ceramic material and ferrite material low-temperature lamination cofiring method. The ceramic material consists of 85 to 95 parts by weight of main component zinc titanate barium and 5 to 15 parts by weight of fluxing agent a, and the ferrite material is formed by placing 0.5 to 5 parts by weight of fluxing agent a into nickel zinc copper ferrite with mol ratio of copper oxide (CuO) of 3 to 10 percent. The ceramic material and the method have following effects that (1) the fluxing agent a plays a role in riveting, when the ceramic and the ferrite are sintered, the ceramic and the ferrite can be mutually bonded; (2) the zinc oxide plays a role of a bridge in cofiring, so that the cohesion between the ceramic material and the ferrite material is increased, and the layering or fracturing of the sintering process can be prevented; and (3) the low-temperature co-firing ceramic (LTCC) process is adopted, so that the production stability is high, the efficiency is high, the cost is low, and mass production can be realized.

The invention belongs to the technical field of functional material preparation, and relates to a preparation method of zinc titanate and titanium dioxide composite nano material. The method comprises the steps that zinc acetylacetonate and titanium acetylacetonate are dissolved and mixed to be uniform in an alcoholic solution, a cross-linking reaction is conducted at certain temperature, the materials are subjected to heat treatment in a muffle furnace, and the zinc titanate and titanium dioxide composite nano material is obtained. According to the preparation method of the zinc titanate and titanium dioxide composite nano material, the technology is simple and convenient and easy to carry out, the purity is high, the impurity content is low, the product is low in preparation cost and excellent in property, and industrial batched production can be achieved. The prepared zinc titanate and titanium dioxide composite nano material is used as a photocatalytic material, has higher catalytic activity and has wide application prospects in the fields of dyestuff wastewater and indoor harmful gas degradation, photocatalytic disinfection and the like.

The invention relates to a foamed nickel-loaded zinc titanate photocatalytic material and a preparation method thereof. The preparation method comprises the following steps: taking foamed nickel as amatrix, uniformly coating zinc titanate template agent mixed suspension on a thin layer to form a zinc titanate/template agent composite carrier; soaking and dissolving out by the template agent, anddrying to form the foamed nickel-loaded zinc titanate (ZnTiO3) photocatalytic material. The preparation method specifically comprises the following steps: forming turbid liquid A from polytetrafluoroethylene (PTFE) and ethanol, and adding ZnTiO3 and the template agent into the turbid liquid A according to a certain ratio so as to form turbid liquid B; uniformly coating the turbid liquid B onto thefoamed nickel, drying and soaking into the template dissolved-out solution for dissolving out the template agent, and flushing with deionized water and drying; and finally obtaining the foamed nickel-loaded ZnTiO3 photocatalytic material. According to the method disclosed by the invention, preparation of the foamed nickel-loaded ZnTiO3 photocatalytic material is realized, the binding force between materials is firm, and the prepared product has high catalytic activity on organic matter degradation in an ultraviolet light range, and has obvious advantages of being long in service life, easy torecover, free in secondary pollution and the like; and the whole process is simple in operation, short in cycle, energy-saving and low in manufacturing cost. The invention relates to a photocatalyticmaterial for water treatment.

The invention discloses a sol-gel preparation method of lithium zinc titanate as a lithium ion battery cathode material. The sol-gel preparation method comprises the following steps of step1, dissolving citric acid and ethylene glycol in deionized water; step 2, weighing a titanium source, a lithium source and a zinc source according to the mole ratio of 3:1:1 into the obtained solution in the step1; step 3, stirring the system in the step 2 for two hours at 60 DEG C to obtain transparent sol; step 4, sequentially stirring the obtained sol in the step 3 for four hours at 80 DEG C; and step 5, transferring the obtained sol in the step 4 into a muffle furnace, and raising the temperature to700-800 DEG C and calcining for 3-5 hours to obtain the final product. The sol-gel preparation method disclosed by the invention solves the problem that a reactant is not uniform to mix caused by material mixing by ball milling or direct roasting in a process of preparing lithium zinc titanate by adopting a solid-phase reaction method.

The invention provides a preparation method of n-zinc titanate powder and application and belongs to the technical field of thermal control coatings of spacecrafts. The preparation method comprises the following steps: performing a co-precipitation reaction on zinc chloride and butyl titanate with a weak acid; after the co-precipitation reaction is completed, putting ammonium hydroxide into the reaction system provided by the step 1, implementing neutralization, filtring, and drying so as to obtain a precursor; performing high-temperature sintering on the precursor, thereby obtaining the n-zinc titanate powder. By adopting the preparation method of the n-zinc titanate powder provided by the embodiment of the invention, butyl titanate is adopted as a titanium source, n-zinc titanate powderwhich is relatively high in purity and small in particle size is prepared, and the powder is relatively low in sunshine absorption rate and good in space environment stability when being used as thermal control packing, and a thermal control coating prepared from the powder is relatively high in hardness and relatively good in stain resistance.

The invention relates to a lithium ion battery electrode material Li2ZnTi3O8 preparation method, and aims at the defects of high temperature, longer reaction time, high organic material cost, toxicity and the like of lithium zinc titanate material preparation method in the prior art. The technical scheme is as follows: titanium dioxide (TiO2), lithium carbonate (Li2CO3) and zinc acetate (Zn (CH3COO) 2.2H2O) and mixed molten salt sodium chloride (NaCl) and potassium chloride (KCl) are mixed and stirred, in the high temperature sintering process, reactant precursors can be sufficiently contacted and reacted in liquid environment facilitating molten salts, prepared nanoscale particular material is uniform in size and free of obvious agglomeration, accumulation holes are among particles, and the structural features is conducive to play the electrochemical properties of the material.

The invention discloses nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and a preparation method thereof. The stoichiometric equation is (Zn1-xNix)TiNb2O8, wherein x is equal to 0.1 to 0.4. According to the invention, ZnTiNb2O8 system microwave dielectric ceramic serves as basis, the traditional oxide mixing method is adopted and Ni2O3 is added to increase the dielectric constant, so that the (Zn1-xNix)TiNb2O8 microwave dielectric ceramic material with excellent comprehensive performance is prepared, wherein the optimal sintering temperature is 1,125 DEG C; and epsilon r=41.36, Q*f=31760.2 GHz, and tau f=-9.2 ppm/DEG C. The nickel oxide-doped niobium zinc titanate microwave dielectric ceramic and the preparation method thereof are mainly used for realizing miniaturization of a resonant loop and are widely applied to industries of information, military industry, mobile communication, electrical and electronic appliances, aviation, petroleum exploration and the like.

The invention relates to an electrode material and a preparation method thereof, and in particular relates to a Cu-doped lithium zinc titanate negative electrode material and a preparation method thereof. The Cu-doped lithium zinc titanate negative material is characterized by having a molecular formula of Li2Zn1-xCuxTi3O8, wherein x is more than 0 and less than or equal to 0.15. The preparation method comprises the following steps of: weighing a titanium source, a lithium source, a zinc source and a copper source, uniformly mixing and then drying; and sintering at 750 DEG C for 5 hours, then naturally cooling to the room temperature, and grinding. After Cu is doped, Cu<2+> can be distributed at a tetrahedron position and an octahedron position in a ratio of 3:2, so that the arrangement of ions in the material generates changes slightly, and the stability of a crystal structure of the material during charging and discharging is improved.