38 results about "Zirconium hydroxide" patented technology

The invention discloses a light-emitting diode packaging material and a preparation method thereof, and relates to the technical field of light-emitting diodes. The method comprises the following steps: adding 4, 4 '-diaminodiphenyl ether into pyromellitic dianhydride for condensation polymerization to obtain a polyamic acid solution, and adding zinc borate nanowires and aluminum nitride powder to prepare an inorganic skeleton enhanced polyamic acid suspension; the preparation method comprises the following steps: reacting zirconium hydroxide sol with an aluminum sec-butoxide solution, and carrying out hydrothermal reaction and high-temperature calcination to obtain ZrO2at-alpha-Al2O3 core-shell particles; the preparation method comprises the following steps: pre-polymerizing 4, 4 '-diphenylmethane bismaleimide and bisphenol A cyanate ester to obtain a prepolymer; the preparation method comprises the following steps: mixing bisphenol A type epoxy resin, inorganic skeleton reinforced polyamide acid suspension, ZrO2at-alpha-Al2O3 core-shell particles and a prepolymer under vacuum, defoaming, injecting into a mold, heating, curing, cooling and demolding to obtain the product. Through the synergistic effect of triple modification, the high temperature resistance and lasting thermal stability of the packaging material are improved, and the packaging material is suitable for the field of light emitting diode packaging with high temperature resistance requirements.

The invention relates to a preparation method of a double-layer high-temperature adhesive for connecting brass and aluminum oxide, which comprises the following steps: reacting aluminum hydroxide, zirconium hydroxide and dilute phosphoric acid to prepare an aluminum zirconium phosphate adhesive base solution, and compounding silicon powder, boron carbide, titanium powder, nickel powder and the adhesive base solution to prepare a special adhesive for coating a brass surface. And compounding silicon powder, boron carbide, titanium powder, nickel powder, aluminum oxide and the gum base solution to prepare the special adhesive for aluminum oxide surface coating. The brass surface coating special glue is brushed on the brass surface and cured, then the aluminum oxide surface coating special glue is brushed on the aluminum oxide surface, the brass coated with the adhesive and the aluminum oxide coated with the adhesive are attached together in the mode that the bonding surfaces are opposite, and the brass / aluminum oxide double-layer bonding piece is obtained after pressing and curing and can serve in the high-temperature environment. The method has the advantages that the special glue for brass surface coating and the special glue for aluminum oxide surface coating have high thermal expansion coefficient matching with brass and aluminum oxide, and thermal stress can be relieved; the double-layer adhesive can provide the bonding strength which can reach 1.3 MPa at the temperature of 500 DEG C.

The invention relates to the technical field of metal composite materials, and discloses a modified graphene reinforced aluminum alloy composite material and a preparation method thereof.The preparation method comprises the steps that zirconium hydroxide is loaded on graphene oxide through a hydrothermal reaction, then zirconium oxide modified graphene oxide is obtained through high-temperature sintering treatment, then reduction treatment is conducted in the hydrogen atmosphere, and the modified graphene reinforced aluminum alloy composite material is obtained. The preparation method comprises the following steps: preparing zirconium-modified graphene, then doping a boron element by adopting an ion implantation process to obtain composite modified graphene, doping zirconium, zirconium (Zr) and aluminum to form an Al3Zr compound, so that the recrystallization process can be hindered, recrystallized grains can be refined, and the generation of an aluminum carbide phase can be inhibited; by doping the boron element, the wettability between graphene and an aluminum alloy melt is improved, the uniform dispersity of graphene in an aluminum alloy matrix can be effectively improved, meanwhile, boron serves as a grain refiner and acts together with zirconium, the grain refinement effect can be further enhanced, and therefore the strength and plasticity of the aluminum alloy are improved.

The application relates to the technical field of textiles, and particularly discloses a plastic fiber deodorizing master batch and a preparation method thereof.A plastic fiber deodorizing master batch, according to mass percentage, raw materials include 50-87% plastic chips, 5-20% zinc oxide, 5-20% zirconium compound composite powder and 3-10% composite dispersant, the zirconium compound composite powder includes zirconium hydroxide and layered zirconium phosphate.The plastic fiber deodorizing master batch can efficiently adsorb and decompose various odors such as ammonia, acetic acid, isoamyl acid and nonenal, has a wider deodorization spectrum, a higher elimination rate and stronger deodorization durability.

A method for forming a dehydration catalyst may comprise peptizing a catalyst precursor with an acid, a cellulose ether, or both, thereby forming a catalyst precursor sol, wherein the catalyst precursor comprising a tungstated support of tungsten and at least one of zirconium oxides, zirconium hydroxides, or titanium oxides; subjecting the catalyst precursor sol to kneading and extrusion to form one or more catalyst precursor extrudates; calcining the one or more catalyst precursor extrudates to form a calcined catalyst precursor; and cooling the calcined catalyst precursor to form the dehydration catalyst.

The invention belongs to the technical field of zirconium hydroxide production, and particularly discloses a continuous production process of nano zirconium hydroxide. According to the continuous production process, the zirconium-containing aqueous solution obtained after zirconium and hafnium separation is used as a raw material, and the chlorine salt aqueous solution which is simple in component and low in price is used as an auxiliary material. By limiting the current density and the electrolysis temperature, production is stable and easy to control; the ion diffusion speed of the whole electrolysis system is stable, the electrolysis efficiency is high, and it is guaranteed that the obtained zirconium hydroxide is nano-particles with the narrow particle size range, and the quality is stable; the obtained cathode reaction slurry is high-purity zirconium hydroxide slurry, a corresponding product can be obtained only through solid-liquid separation without drying treatment, and a complex impurity removal post-treatment process is not needed; by controlling electrolysis ending conditions, the product yield is up to 99.5% or above, the content of anion impurities in the product is smaller than 1000 ppm, and particles are fine and uniform and high in quality. The method is simple in process, low in raw material cost, easy in product post-treatment and small in environmental pollution, and is a green synthesis method for synthesizing nano zirconium hydroxide.

A method for forming a dehydration catalyst may comprise peptizing a catalyst precursor with an acid, a cellulose ether, or both, thereby forming a catalyst precursor sol, wherein the catalyst precursor comprising a tungstated support of tungsten and at least one of zirconium oxides, zirconium hydroxides, or titanium oxides; subjecting the catalyst precursor sol to kneading and extrusion to form one or more catalyst precursor extrudates; calcining the one or more catalyst precursor extrudates to form a calcined catalyst precursor; and cooling the calcined catalyst precursor to form the dehydration catalyst. The catalysts of the examples have platinum or palladium impregnated on a tungstated zirconia support.

The utility model relates to a rotary kiln for preparing zirconium oxide, and relates to the technical field of zirconium oxide preparation equipment, the rotary kiln is sequentially and rotatably provided with a metal kiln cylinder, a ceramic kiln cylinder and a cooling kiln cylinder, zirconium hydroxide and zirconium oxide materials are firstly heated in the metal kiln cylinder so as to dehumidify and remove impurities; then, sintering is carried out in a ceramic kiln cylinder, and zirconium hydroxide is converted into zirconium oxide; and finally, cooling in the cooling kiln cylinder. The process can realize automatic, continuous and uninterrupted production, so that the stability and continuity of zirconium oxide are ensured, and the industrial production requirements are met. Meanwhile, the metal kiln barrel is made of 310S stainless steel materials, the ceramic kiln barrel inner container is made of high-purity zirconia ceramic, the purity of products is guaranteed, and therefore high-purity zirconia powder can be prepared. In addition, the cooling kiln barrel is made of metal materials, the cooling speed is effectively increased, the production cycle is greatly shortened, and the production efficiency is improved.

The present invention provides a polymer gel channeling sealant for heavy oil steam stimulation. The polymer gel channeling sealant system employs nano-zirconium hydroxide particles as a strengthening agent, a phenolic crosslinker or a urotropine / hydroquinone mixed crosslinker as a crosslinker, and a nonionic polyacrylamide as a gelling agent. The polymer gel channeling sealant is stable for over 180 days at a high temperature of 170°C, achieving high sealing strength and a sealing rate exceeding 85%.

The present invention discloses a method for preparing and using a heavily coated cobalt oxide. First, spherical cobalt hydroxide particles are synthesized by a co-precipitation method. Then, the spherical cobalt hydroxide particles are dried, dehydrated, and uniformly mixed with zirconium alkyl carboxylate / aluminum alkyl carboxylate and zirconium hydroxide / aluminum hydroxide. The mixture is then heated to react with the cobalt hydroxide on the particle surface, causing it to adhere closely to the surface of the spherical cobalt hydroxide particles. Finally, the particles are calcined to remove organic matter, resulting in spherical cobalt oxide particles with a strong coating on their surface.In the present invention, the coating layer and the base material are connected through chemical bonds, which makes the two adhere to each other more closely, so that the coating layer is not easy to spray off and peel off, greatly extending the service life of the coating layer, and improving the cycle performance of the material.

The utility model discloses a treatment system for nano-zirconia toughened ceramic powder production sewage. The treatment system comprises a first mixing tank for collecting low-alcohol-content wastewater and a second mixing tank for collecting high-alcohol-content wastewater, a vibrating membrane, a vibrating membrane water production tank and a diluted alcohol tower are sequentially arranged in the water outlet direction of the first mixing tank; a concentrated alcohol tower is arranged in the water outlet direction of the second mixing tank; gas phases of the diluted alcohol tower and the concentrated alcohol tower sequentially enter a deamination tower and an ammonia absorption tower, and a liquid phase of the deamination tower sequentially enters a flash tank and a vaporization film; liquid phases of the diluted alcohol tower and the concentrated alcohol tower enter a sewage adjusting tank, a filtering system and a high-pressure reverse osmosis membrane concentration system are sequentially arranged in the water outlet direction of the sewage adjusting tank, high-pressure reverse osmosis membrane produced water enters a low-pressure reverse osmosis membrane concentration system, and low-pressure reverse osmosis produced water is discharged. According to the device disclosed by the utility model, alcohol extraction and deamination, membrane concentration and evaporative crystallization are adopted, and the recovered zirconium hydroxide, ethanol and ammonia water can be directly reused for production, so that the problem of high salinity in sewage is solved, and the water production guarantee rate is improved.

The adhesive film for circuit connection contains conductive particles and includes a region A containing a cationic polymerizable compound, a thermal cationic polymerization initiator, and an ion scavenger in the thickness direction of the film. The cationic polymerizable compound contains an epoxy compound, the thermal cationic polymerization initiator contains an anilinium salt, and the ion scavenger contains at least one metal compound selected from the group consisting of aluminum hydroxide, aluminum oxide, magnesium hydroxide, magnesium oxide, zirconium hydroxide, zirconium oxide, bismuth hydroxide, bismuth oxide, calcium hydroxide, calcium oxide, tin hydroxide, tin oxide, manganese hydroxide, manganese oxide, antimony hydroxide, antimony oxide, silicon hydroxide, silicon oxide, titanium hydroxide, and titanium oxide.

The invention discloses a heat-resistant light wallboard and a preparation method thereof, and relates to the technical field of building wallboards. The hollow microspheres with uniform and stable wall thickness are prepared by copolymerizing supporting macromolecules of polystyrene and zirconium hydroxide, so that the mechanical property and high temperature resistance of the light wallboard are improved, and then the hollow microspheres are blended with nano boron carbide, calcium magnesium aluminate cement and phosphate cement to form a system with a complete structure, so that the mechanical property of the wallboard is further improved, and the light wallboard has a good application prospect. Then, low-porosity foam is prepared by adopting a carbon dioxide foaming process, calcium ions and magnesium ions in the cement are subjected to mineralization reaction with carbon dioxide to form calcite, so that the curing effect is achieved, the strength and the high-temperature-resistant effect of the wallboard are improved, then, hollow microspheres are calcined and hardened, phosphate can be used as a high-temperature adhesive, and the wallboard can be well cured. Pores in a matrix are filled with the boron carbide, so that the mechanical property and the high-temperature-resistant effect of the wallboard are improved.

A preparation method of a ceramic material for a lithium battery diaphragm sequentially comprises the following steps: (1) preparing a zirconium oxychloride solution, carrying out a neutralization precipitation reaction with ammonia water, and controlling the pH value of a reaction system to be 8.6-9.0 to generate a zirconium hydroxide precursor; (2) carrying out filter pressing and washing on the zirconium hydroxide precursor to prepare a zirconium hydroxide filter cake; (3) calcining the zirconium hydroxide filter cake at the temperature of 740-750 DEG C to generate zirconium dioxide granules; (4) adding water into the zirconium dioxide granules to prepare slurry, adding a water-soluble anionic polymer, grinding and removing magnetic inclusions until the particle size reaches 0.4-0.6 mu m; (5) spray granulation; (6) secondary removal of magnetic impurities; and (7) jet milling. According to the method, the ceramic powder with excellent dispersity, uniform granularity and low magnetic inclusion can be prepared, so that when the ceramic powder is used as a lithium battery diaphragm coating material, the thermal stability of a battery can be remarkably improved, and the wettability and the electrolyte retention capability of an electrolyte can be improved.

The application belongs to the technical field of gas adsorbents, and particularly relates to a sulfur dioxide low-temperature adsorbent, a preparation method and application thereof. The sulfur dioxide low-temperature adsorbent comprises a carrier and an active component loaded on the carrier; the carrier is a mixture of aluminum hydroxide and zirconium hydroxide, the mass ratio of the aluminum hydroxide to the zirconium hydroxide is 4:1-4; the active component is metal copper and / or metal potassium; and the mass ratio of the carrier to the active component is 100:4-15. The sulfur dioxide low-temperature adsorbent provided by the application can effectively adsorb sulfur dioxide in flue gas at a working temperature of 280 DEG C, and the sulfur capacity is more than 95 mg / g, so that the advantages of low working temperature, low energy consumption and high sulfur dioxide adsorption efficiency are combined. Moreover, the preparation process is simple and easy to operate, the production process is short, and the production cost is low.

The invention relates to the technical field of cement, and particularly discloses high-performance cement with cooperation of a vertical mill and ball milling and a preparation method of the high-performance cement. The high-performance cement comprises the following raw materials: Portland cement clinker, dihydrate gypsum, a polycarboxylate superplasticizer, fly ash, granulated blast furnace slag, silica fume and modified graphene oxide, the modified graphene oxide is prepared by the following operation steps: preparing a graphene oxide aqueous solution, adding ascorbic acid, adding indium hydroxide and zirconium hydroxide, adjusting pH for reaction, filtering and drying to obtain the modified graphene oxide. When the cement is prepared, the vertical mill is in butt joint with the ball mill, mixed cement raw materials are added into the vertical mill, and then ball milling is carried out. The 3d / 28d compressive strength and the 3d / 28d breaking strength of the cement obtained in the invention are respectively 29.3 MPa, 52.0 MPa, 6.5 MPa and 9.7 MPa at most, are qualified through stability detection, are high in crack resistance and have relatively high comprehensive performance.

This invention discloses a method for crystallizing sodium nitrate in the field of inorganic salt crystallization technology. The method involves dissolving sodium nitrate raw material in deionized water and filtering. Magnesium-aluminum-silicon-boron composite layered oxygen hydroxyl compound nanosheets anchored with fluorine-containing cerium-zirconium hydroxide-hydrated oxides are added to the filtrate. The mixture is then dispersed under heat, cooled in stages, seeded with sodium nitrate under reduced pressure, evaporated under reduced pressure, crystallized under heat, centrifuged, washed with a saturated sodium nitrate solution, and dried to obtain sodium nitrate crystals. The fluorine-containing cerium-zirconium hydroxide-hydrated oxide-anchored magnesium-aluminum-silicon-boron composite layered oxygen hydroxyl compound nanosheets are obtained through co-precipitation of magnesium, aluminum, cerium, and zirconium nitrates, heat treatment with fluorine-containing water, silicon-boron composite modification, and heat-treated grinding and spray drying. This invention can regulate the nucleation and growth of sodium nitrate crystals, improve crystal particle size uniformity, reduce mother liquor entrainment, and improve crystal separation and drying effects.

A method for washing chloride ions from a zirconium hydroxide filter cake comprises the following steps: (1) adding the zirconium hydroxide slurry after neutralization and precipitation reaction to a vacuum filter, starting suction filtration, and removing mother liquor until the height difference between the mother liquor level and the filter cake surface is 10-20% of the filter cake thickness; (2) adding a washing liquid to the filter cake in the vacuum filter, wherein the washing liquid is ammonia water with a pH value of 9.5-10.5; removing the filtrate that has been exchanged with the filter cake by suction filtration until the height difference between the washing liquid level and the filter cake surface is 10-20% of the filter cake thickness; (3) sampling and detecting the chloride ion concentration of the filter cake after treatment in step (2); if the chloride ion concentration is equal to or lower than the control requirement value, proceeding to step (4); if the chloride ion concentration is higher than the control requirement value, returning to step (2); (4) continuing suction filtration to remove excess water in the filter cake until the filter cake meets the solid content control requirement. The present invention can quickly and effectively remove chloride ions from the zirconium hydroxide filter cake, is simple to operate, and helps reduce production costs.

The application discloses a polyamide composition and a preparation method and application thereof, and belongs to the field of high polymer materials. The polyamide composition utilizes an organic phosphine flame retardant and a flame retardant synergist to form a flame retardant system, and introduces aromatic polyamide and zirconium hydroxide to improve electrochemical corrosion resistance. Under the synergistic effect of the components, the composition has excellent mechanical properties, flame retardant properties and electrochemical corrosion resistance, especially high-temperature and high-humidity (such as 85 DEG C in temperature and 85% RH in humidity) electrochemical corrosion resistance, and has a very good application prospect in the fields of new energy high-voltage connectors, energy storage connectors and the like.

Method for manufacturing elements for electrical working machines, which are formed with superimposed layers (1) of iron or an iron alloy with soft magnetic properties and in which an electrically insulating layer (2) is arranged between each of the layers (2) formed with iron or with the iron alloy, wherein the layers (1) of iron or the iron alloy each with a suspension formed with iron or with a powder of the iron alloy and an organic binder are formed by screen printing in a predetermined geometry with a predetermined first layer thickness and the electrically insulating layers (2) formed between the layers (1) of iron or the iron alloy formed by screen printing, which are formed with a powder and an organic binder, are formed by screen printing in the specified geometry with a specified second layer thickness, wherein the powder is a hydroxide or acetate selected from magnesium hydroxide, aluminum hydroxide, zirconium hydroxide, magnesium acetate, aluminum acetate and zirconium acetate or a carbonate selected from magnesium carbonate and zirconium carbonate and Following screen printing, the resulting layer stack undergoes a thermal treatment, during which In a first stage, debinding takes place in the temperature range between 100 °C and 800 °C, whereby the respective hydroxide, acetate and / or carbonate is decomposed in the temperature range between 100 °C and 300 °C, and a chemical reaction is carried out in which the respective hydroxide, acetate and / or carbonate is formed into the respective metal oxide with a fine particle size distribution of < 1 µm, and following the first stage, a second stage of thermal treatment is carried out, in which in a reducing atmosphere at a temperature in the range of 1200°C to 1350°C, sintering of the iron or the respective iron alloy is carried out to form layers (1) with corresponding soft magnetic properties and porous electrically insulating layers (2) are obtained.

The present invention belongs to the technical field of hydrometallurgy, and in particular relates to a refining method for high-impurity nickel sulfate, comprising the following steps: (1) dissolving: adding water to the high-impurity nickel sulfate to dissolve it, thereby obtaining a high-impurity nickel liquid; (2) removing arsenic and iron: heating the high-impurity nickel liquid to 60-95° C., adding a neutralizing agent, adjusting the pH value of the system to 3.0-3.5, and performing solid-liquid separation to obtain arsenic slag and arsenic-removed iron liquid; (3) deep impurity removal: adding zirconium hydroxide to the arsenic-removed iron liquid, adjusting the pH value of the system to 4.5-6.0, and performing solid-liquid separation to obtain impurity-removed slag and impurity-removed liquid; (4) extracting and purifying: accurately filtering the impurity-removed liquid, adding P204, extracting and removing manganese, calcium and zinc, and performing phase separation to obtain a P204 raffinate and a loaded organic phase I; and adding P507 or C272 to the P204 raffinate, extracting and removing cobalt and magnesium, and performing phase separation to obtain a refined nickel sulfate solution and a loaded organic phase IV. The present invention can deeply remove impurities such as arsenic, iron, aluminum, silicon, fluorine, chromium, copper, calcium, manganese, zinc, cobalt and magnesium in crude nickel sulfate without introducing impurities, and the removed slag can be recycled and reused.

The invention discloses a zirconium oxide powder production system, which realizes automatic production of generating zirconium oxide powder from wet material zirconium hydroxide, and adopts the technical scheme that the zirconium oxide powder production system comprises a dryer, a crusher, a calcining furnace, a cooling unit, a crusher and a packaging unit which are sequentially butted; the dryer is used for drying wet material zirconium hydroxide; the crusher is used for crushing and drying zirconium hydroxide; the calcining furnace is used for calcining zirconium hydroxide to generate zirconium oxide; the cooling unit is used for cooling zirconium oxide to a preset temperature; the crusher is used for crushing zirconium oxide to form zirconium oxide powder; and the packaging unit is used for quantitatively packaging zirconium oxide powder, and belongs to the technical field of inorganic compound production.

The invention discloses a method for preparing tobacco flavor by catalyzing tobacco leaf residue aqueous extract and application of the tobacco flavor in cigarettes. The method comprises the following steps: (1) preparing a solid acid catalyst: dipping zirconium hydroxide in 0.8-1.2 mol / L sulfuric acid solution, stirring, filtering, drying solid, grinding, transferring into a muffle furnace, calcining, cooling, cleaning with water and ethanol, and drying in vacuum to obtain the catalyst; (2) pretreatment of tobacco leaf waste: adding water and citric acid into the tobacco leaves subjected to supercritical extraction, uniformly mixing, stirring and heating after oscillation ultrasonic treatment, cooling and centrifuging, and taking supernatant liquid to obtain a water extract; and (3) preparing the tobacco flavor: adding the water extract into a reaction kettle, adding a catalyst, introducing N2 to remove air, carrying out an oil bath stirring reaction, stopping stirring, reducing the temperature of the reaction kettle to room temperature, opening the reaction kettle, centrifuging, and taking supernatant liquid, namely the tobacco flavor. The preparation method has the characteristics that equipment is simple, the preparation method is green and efficient, the catalyst can be repeatedly used, the sensory quality of the obtained perfume is outstanding, and the smoke state is obviously improved.

The invention discloses a composite nano caustic soda liquid, a preparation method and sewage treatment thereof.The formula of the composite nano caustic soda liquid comprises deionized water, nano sodium hydroxide, nano calcium hydroxide, nano zirconium hydroxide, polyacrylamide, polyaluminum chloride, sodium dodecyl benzene sulfonate, sodium polyacrylate, nano iron oxide and sodium carboxymethyl cellulose.The preparation method comprises the steps that firstly, the nano sodium hydroxide, the nano calcium hydroxide, the nano zirconium hydroxide, the polyacrylamide, the polyaluminum chloride, the sodium dodecyl benzene sulfonate, the sodium polyacrylate, the nano iron oxide and the sodium carboxymethyl cellulose are added; preparing raw materials; step 2, pre-dispersing the nano material; step 3, adding an auxiliary agent; and step 4, packaging and storing. According to the invention, the nanoscale alkaline raw material is adopted, so that the reaction speed with acidic substances in sewage can be increased, and the sewage treatment efficiency is improved; by adding the flocculant component and the adsorbent component, suspended solids and heavy metal pollutants in sewage can be purified, so that the sewage treatment effect is improved; according to the invention, the carrier is adopted to load the composite nano caustic soda liquid so as to treat sewage, so that not only can the dosage be accurately controlled, but also the use convenience and safety of the composite nano caustic soda liquid are improved.

The application discloses a kind of magnesium oxide partial stable zirconium oxide slurry and its preparation method and application, take zirconium oxychloride crystal and dissolve in deionized water, add magnesium chloride hexahydrate to form chloride mixed solution;Excess ammonia is added dropwise to the mixed solution, and after zirconium hydroxide, magnesium hydroxide is precipitated, centrifugal and repeatedly hot water washing;Drying and high-temperature calcination, then add dispersing agent and wet grinding solvent ball milling;After drying, the qualified powder is prepared into aqueous solution, and a dispersing agent is ultrasonically vibrated;pH is adjusted with ammonia water, and the slurry is obtained by continuous stirring.The application process is simple, and operability is relatively strong, sample fluidity and dispersibility are better, can effectively inhibit the stress concentration caused by abrasive particle accumulation during grinding of GaSb substrate, and the surface quality of GaSb substrate after grinding is greatly improved, and the damage rate of T2SL infrared detector chip GaSb substrate after grinding is low.

The present specification describes a zirconia support comprising > = 95 wt% ZrO2 wherein: the support has a crushing strength of 20 N to 140 N; the support has a total pore volume of from 0.10 mL / g to 0.40 mL / g when measured by N2 physical adsorption; the carrier has an acidic site density of 15 LNH3 / m < 2 > to 30 LNH3 / m < 2 >; and the carrier has an alkaline site density of from 0.006 wt% / m2 to 0.015 wt% / m2 as measured by the MBOH test. Also described is a method for producing a zirconia support starting from zirconia or zirconia hydroxide as a starting material.

The present invention belongs to the technical field of wastewater chemical treatment, and specifically relates to water pollution detection and treatment equipment and methods. The present invention removes ionized and free ammonia nitrogen pollutants contained in wastewater in a sedimentation zone and a crystallization zone, respectively, and reduces the content of solid particle impurities in the wastewater, thereby fully removing the ammonia nitrogen pollutants in the wastewater. In addition, the main components of ultrafine nanometer-scale particles remaining in the wastewater after zirconium oxide production filtration are zirconium hydroxide particles, which can serve as crystallization nuclei for the crystallization reaction of ammonium bicarbonate substances, accelerating the crystallization reaction while reducing the scaling of reaction equipment caused by adhesion to the inner wall of the crystallization zone. At the same time, the ultrafine nanometer-scale zirconium hydroxide particles are crystallized to combine with the ammonium bicarbonate substance, agglomerating and agglomerating to increase the particle size, facilitating subsequent filtration and separation, thereby reducing the content of solid particle impurities in the wastewater and more fully recovering the zirconium hydroxide particles in the wastewater.

This invention discloses a light-emitting diode (LED) packaging material and its preparation method, relating to the field of LED technology. The method includes the following steps: 4,4'-diaminodiphenyl ether is added to pyromellitic dianhydride for a condensation reaction to obtain a polyamic acid solution; zinc borate nanowires and aluminum nitride powder are added to obtain an inorganic framework-reinforced polyamic acid suspension; zirconium hydroxide sol is reacted with aluminum sec-butoxide solution, followed by hydrothermal reaction and high-temperature calcination to obtain ZrO2@α-Al2O3 core-shell particles; 4,4'-diphenylmethane bismaleimide and bisphenol A cyanate are prepolymerized to obtain a prepolymer; bisphenol A epoxy resin, the inorganic framework-reinforced polyamic acid suspension, ZrO2@α-Al2O3 core-shell particles, and the prepolymer are mixed and degassed under vacuum, injected into a mold, cured by heating, and then demolded to obtain the product. This invention, through a triple modification synergistic effect, improves the high-temperature resistance and long-term thermal stability of the packaging material, making it suitable for LED packaging applications with high temperature resistance requirements.

The application discloses a high-humidity environment performance maintaining method for hafnium-zirconium oxide thin film ferroelectric capacitor, which comprises annealing treatment after a wet process and a moisture-resistant structure of the device. In the wet process, the hafnium-zirconium oxide thin film is easy to react with water vapor to generate zirconium hydroxide. The reaction can be reversed by selecting a proper annealing temperature, so that the stability of the thin film composition is ensured. Meanwhile, the hafnium-zirconium oxide thin film device is easy to absorb moisture in the environment, thereby affecting the performance. Therefore, an oxide thin film with positive Gibbs free energy in the reaction with water vapor is selected as a protective layer to inhibit the reaction of the thin film with water vapor. The application can effectively maintain the performance of the hafnium-zirconium oxide thin film ferroelectric device, and is relatively simple in process implementation.

The present invention discloses a high-strength and temperature-resistant polymer gel plugging agent, a preparation method, and applications. The plugging agent is prepared by cross-linking a nano zirconium hydroxide sol with a low-molecular-weight, high-concentration acrylamide / 2-acrylamide-2-methylpropanesulfonic acid (AM / AMPS) polymer and adding a gel strength enhancer for strengthening. The plugging agent has low viscosity before gelling and has extremely high plugging strength after gelling, and can meet the requirements for blocking channeling in fire-driven heavy oil reservoirs at 110-150°C. The plugging agent has simple components and is easy to prepare. The three components only need to be slowly dissolved in water and stirred evenly before use. Moreover, all the components are environmentally friendly. The present invention saves time and economic costs, is environmentally friendly, and has strong use value.