949 results about "Aluminium oxide" patented technology

The invention discloses a method of preparing aluminum oxide-silicon carbide compound porous ceramic by aluminum-silicon industrial waste residues. The primary raw materials comprise industrial waste residues, carbon powder, a pore forming substance and an adhesive. The aluminum oxide-silicon carbide compound porous ceramic is prepared by the following steps of mixing, drying, forming and sintering to obtain a final product. Treatment and high additional value utilization of the industrial waste residues are achieved. The prepared porous ceramic is remarkable in performance, and can be applied to the fields of filtration, sound isolation, heat isolation, fire fighting and the like. The method is simple in process flow and convenient for industrialized promotion; and the cost is good to control and the method has extreme economical value.

The invention discloses a low-carbon magnesia-carbon refractory material for clean steel smelting and a preparation method thereof, and relates to the technical field of magnesia-carbon refractory materials. The low-carbon magnesia-carbon refractory material comprises the following components: 40-50 wt% of fused magnesite with the particle size of 3-5 mm, 20-30 wt% of fused magnesite with the particle size of 1-3 mm, 10-20 wt% of fused magnesite with the particle size of less than or equal to 74 [mu] m, 8-12 wt% of silicon powder, 1-3 wt% of alumina powder and 3-5 wt% of crystalline flake graphite. 2-4 wt% of a composite additive and 4-6 wt% of phenolic resin are added; the composite additive comprises andalusite and mullite. The material has excellent mechanical properties, thermal shock resistance, oxidation resistance and erosion resistance; the preparation method has the characteristics of low cost and simple process, and the prepared low-carbon magnesia carbon refractory material has excellent oxidation resistance, thermal shock resistance and slag resistance by exerting the phase volume expansion effect and intergranular phase enhancement effect of the multiphase ceramic; the used graphite is low in content, graphite consumption and molten steel recarburization risk can be reduced, and the method is suitable for smelting clean steel.

The invention discloses a long-life alumina crucible as well as a preparation method and application thereof. The raw material composition of the alumina crucible comprises pretreated quartz particles; the pretreated quartz particles are obtained through a pretreatment process; according to the pretreatment process, the surfaces of fused quartz particles are coated with a modifier through a granulation process, and the pretreatment process specifically comprises the steps that the fused quartz particles, the modifier and a binding agent are mixed, granulated and dried, and pretreated quartz particles are obtained. The fused quartz particle raw material is subjected to modification pretreatment, so that the crystallization behavior of fused quartz is reduced or inhibited, the stability of the fused quartz particles in the crucible firing and high-temperature service process is improved, and the binding property of the fused quartz particles and the fine powder component is enhanced, so that the mechanical properties such as breaking strength and fracture toughness of the alumina crucible are improved; therefore, the service life and the stability of the crucible are improved, and the performance of the alumina crucible can completely meet the requirement of the service life under extreme conditions in the fields of rare noble metal smelting and the like.

The invention relates to a preparation method of monodisperse spherical alumina powder with uniform granularity. The preparation method comprises the following steps: dissolving and stirring an aluminum source, a precipitator and a dispersing agent in ultrapure water to prepare an aluminum oxide precursor solution; transferring the prepared aluminum oxide precursor solution into a hydrothermal reaction kettle, carrying out heating reaction, after the hydrothermal reaction is finished, naturally cooling to room temperature, alternately and respectively washing with ultrapure water and ethanol, and drying to obtain aluminum oxide precursor powder; and sintering the prepared aluminum oxide precursor powder in a muffle furnace in an air atmosphere to obtain the spherical aluminum oxide powder. The hydrothermal method is adopted to react in a high-temperature and high-pressure environment, so that the reaction uniformity is improved, and the spherical aluminum oxide precursor with uniform granularity and consistent morphology is obtained. The bending strength of the obtained ceramic material is remarkably improved, and the highest bending strength reaches 245MPa. The method has wide application prospects in the fields of heat-conducting composite materials, integrated circuit films, substrate materials, 3D printing materials, precision polishing materials and the like.

The invention discloses a high heat storage density stable thermochemical adsorption composite heat storage material and a preparation method thereof, the high heat storage density stable thermochemical adsorption composite heat storage material comprises 54%-57% by mass of mixed salt and 43%-46% by mass of a porous material, the mixed salt comprises MgSO4 and MgCl2, the mass ratio of MgSO4 to MgCl2 is 9: 1-6: 4, and the porous material is expanded perlite modified by nano alumina or a silane coupling agent. The high-heat-storage-density stable thermochemical-adsorption composite heat storage material provided by the invention is simple in preparation method, and the modified expanded perlite is used as a carrier of the mixed hydrated salt; the obtained composite heat storage material has excellent performance: the salt-containing load rate is 114-121%, the water absorption rate is 1.2-1.28 g / g, the heat storage density is 1123.5-1208.6 kJ / kg, the heat storage temperature is 133.4-141.3 DEG C, the structural strength is 10.346-12.631 kPa, the structural stability is 99.27-99.53%, and the stability is 79.7-83.3% after circulation for 30 times, that is, the composite heat storage material is high in heat storage density, high in water absorption rate, low in heat storage temperature, high in strength and not easy to scatter and fall off, and the composite heat storage material is suitable for large-scale production. And the material also has relatively good cycling stability.

The invention discloses a blue-and-white glaze and a preparation method and application thereof, and belongs to the technical field of inorganic non-metallic materials (ceramics), the blue-and-white glaze comprises quartz, feldspar, limestone, plant ash and other basic raw materials, zinc oxide, aluminum oxide, lanthanum oxide, cerium oxide and other rare earth elements, and a modified organic additive is introduced. Compared with the prior art, the blue-and-white glaze shows excellent stability in the drying and firing process, the phenomena of cracking and glaze stripping are effectively reduced, the friction coefficient after firing is low, the breaking strength and the breaking modulus are high, the glossiness and transparency of a glaze surface are remarkably improved, and the blue-and-white glaze has important application value.

The invention belongs to the technical field of glass materials, and discloses thermal shock resistant transparent high borosilicate glass which comprises the following components in percentage by weight: 60-70% of silicon dioxide, 18-22% of diboron trioxide, 4-7% of aluminum oxide, 3-5% of magnesium oxide, 2-4% of alkali metal oxide, 0.5-1.5% of nano silicon nitride and 0.5-1% of nano aluminum titanate. The thermal shock temperature difference of the glass within the temperature change range of 20-200 DEG C is larger than or equal to 180 DEG C, the light transmittance within the visible light range of 400-760 nm is larger than or equal to 85%, the alkali metal oxide is composed of sodium oxide and potassium oxide, the weight ratio of the sodium oxide to the potassium oxide is 1: 1-3: 1, the average particle size of the nanometer silicon nitride is smaller than or equal to 100 nm, and the nanometer silicon nitride is evenly dispersed in the glass matrix; according to the thermal-shock-resistant transparent high borosilicate glass and the preparation method thereof, the thermal shock resistance and light transmittance of the glass are improved by optimizing the chemical components of the glass and adding the special nanoparticles in cooperation with a specific preparation process, and the thermal shock resistance of the glass is improved. The problems that existing high borosilicate glass is insufficient in thermal shock resistance and low in light transmittance in a high-temperature environment are solved.

The invention relates to the technical field of surface engineering, discloses a method and a system for preparing a yttrium fluoride composite ceramic coating through atmospheric plasma spraying, and aims to solve the problems that the yttrium fluoride coating generates a brittle aluminum fluoride layer on the surface of an aluminum substrate due to fluorine ion diffusion, so that the bonding strength is low, and the yttrium fluoride coating is easy to peel off and lose efficacy. The method comprises the following steps: sequentially carrying out mechanical polishing, ultrasonic cleaning and sand blasting roughening on an aluminum base material; preparing composite powder formed by mixing yttrium fluoride, yttrium oxide and nanometer aluminum oxide according to the mass ratio of 75: 20: 5; sequentially depositing a yttrium oxide transition layer, a composite barrier layer and a yttrium fluoride functional layer by adopting atmospheric plasma spraying; and finally carrying out vacuum post-heat treatment. According to the system, through the synergistic effect of the three layers of gradient structures, the transition layer forms an yttrium aluminate metallurgical bonding interface, the barrier layer inhibits fluorine ion diffusion through the dual mechanisms of nanometer aluminum oxide physical barrier and yttrium oxide chemical adsorption, and the functional layer guarantees the plasma erosion resistance. According to the method, the bonding strength of the coating is remarkably improved to 50 MPa or above, the porosity is lower than 3%, stripping is avoided under 500-hour high-energy plasma bombardment, the process cost is reduced by 40%, and the method is suitable for cavity protection of semiconductor etching equipment.

The invention relates to the technical field of ceramic substrates, and provides a high-toughness aluminum oxide ceramic substrate and a preparation method thereof, the high-toughness aluminum oxide ceramic substrate comprises the following raw materials by weight: 100 parts of aluminum oxide, 1-3 parts of a plasticizer, 4-6 parts of an auxiliary agent, 4-6 parts of a binder, 1-3 parts of a dispersant, and 55-65 parts of water; the auxiliary agent is composed of an auxiliary agent A and an auxiliary agent B, the auxiliary agent A comprises rare earth oxide, and the auxiliary agent B is composed of molybdenum boride, scandium oxide and zirconium oxide. According to the technical scheme, the problem of low toughness of the aluminum oxide ceramic substrate in the prior art is solved.

The invention relates to the field of architectural ceramics, and discloses a sapphire effect dry particle, a ceramic tile with a sapphire imitation effect and a preparation method of the ceramic tile. The sapphire effect dry granules comprise blue dry granules and transparent dry granules, wherein the blue dry granules are prepared from the following raw materials: 1.5 to 3.5 parts of superfine tin dioxide, 15 to 19.5 parts of cobalt oxide, 4.5 to 7.5 parts of titanium oxide, 8 to 14 parts of zinc oxide, 32 to 43 parts of calcined aluminum oxide, 8 to 13 parts of quartz, 10 to 16 parts of potassium feldspar and 2.5 to 4.5 parts of boric acid; the transparent dry particles comprise the following raw materials in parts by weight: 8-15 parts of zinc oxide, 5-10 parts of aluminum oxide, 24-28 parts of quartz, 1-2.5 parts of nano silicon nitride and 7-11 parts of cryolite. By mixing the two dry granules, the frit dry granules which have a three-dimensional effect and an ice crack texture and imitate the texture of sapphire crystals can be prepared. The ceramic tile with the sapphire-like effect can be prepared by adopting the dry particles with the sapphire effect.

The invention discloses a light spray coating and a construction process thereof. The light spray coating comprises 15-20% of cement, 15-20% of plant particles, 35-40% of building material particles, 15-18% of clay, 5-8% of siliceous superfine powder, 3-5% of cellulose, 3-5% of alumina micropowder and 0.02-0.05% of aluminum powder. The construction process comprises the following steps: S1, mixing and stirring the light spraying material, adding water accounting for about 3% of the total weight of the light spraying material for wetting, forming a semi-dry material, and filling the semi-dry material into a powder tank of a powder spraying machine; s2, a semi-dry method is adopted for spraying, the semi-dry material in the step S1 is fed into a muzzle of a powder spraying gun, atomized water is added into the muzzle, and the semi-dry material is sprayed to a construction part in the sequence of water first and material second; and rubber powder is added into the atomized water. The materials in the spray coating are simple and easy to obtain, the cost is low, the effects of comprehensive reinforcement and no influence on the internal ecology of the soil can be achieved, the construction is simple and rapid, and a construction foundation does not need to be built; the setting time is extremely short, and the construction period is not delayed; the terrain does not need to be considered, the construction surface is smooth, and the original construction part is not changed too much.

The invention belongs to the technical field of metamaterial sensors, and particularly relates to a metamaterial multi-parameter sensor for a complex environment, which comprises a dielectric substrate, a temperature sensor, a pressure sensor and a strain sensor, and is characterized in that the dielectric substrate is made of high-temperature co-fired alumina ceramic; the temperature sensor is arranged at the left end of the dielectric substrate; the pressure sensor is arranged in the middle of the medium substrate; and the strain sensor is arranged at the right end of the dielectric substrate and comprises a metal sheet structure capable of generating relative displacement. According to the invention, long-distance signal monitoring is realized by adopting a microwave scattering technology, and the problem that a traditional wired sensing transmission line is damaged at a high temperature is solved; the high-temperature-resistant aluminum oxide HTCC ceramic is used as the dielectric substrate, temperature measurement within the range of 25 DEG C to 1200 DEG C, pressure within the range of 0 kPa to 700 kPa and strain measurement within the range of-400 mu epsilon to + 400 mu epsilon are achieved, the sensor is smaller in size and higher in sensitivity, and application of a traditional sensor in the multi-metal environment is expanded.

The present invention discloses a preparation method and use of an Al2O3-Al composite packaging material, and the preparation method comprises the following steps: step A: uniformly mixing aluminum powder, aluminum oxide powder, CuO-TiO2 powder and ceramic particle additive powder to obtain a mixed raw material A; step B: adding a polyvinyl alcohol aqueous solution to the mixed raw material A and grinding it fully to obtain a mixed raw material B; step C: placing the mixed raw material B in a ball mill for ball milling, and obtaining a mixed raw material C after the ball milling is completed; step D: cold-pressing the mixed raw material C to obtain a prefabricated block; step E: placing the prefabricated block in a resistance furnace for sintering, and cooling it to room temperature with the furnace after the sintering is completed, to obtain an Al2O3-Al composite packaging material. The composite packaging material is used to encapsulate an aluminum-silicon alloy phase change heat storage material. The composite packaging material prepared by the present invention can be used to encapsulate an aluminum-silicon alloy phase change heat storage material, and has the advantages of good corrosion resistance and not easy to leak.

The invention discloses a high-thermal-conductivity insulating electric power engineering material and a preparation method thereof, and relates to the technical field of insulating material preparation. The composite material is prepared from 40-60 parts of polyimide resin, 20-30 parts of boron nitride nanosheets, 10-15 parts of alumina micro powder, 5-10 parts of a silane coupling agent, 3-8 parts of a plasticizer, 2-5 parts of an antioxidant, 1-3 parts of carbon nanotube whiskers, 1-2 parts of graphene quantum dots and 0.5-1 part of rare earth yttrium oxide. The diameter-thickness ratio of the boron nitride nanosheet is 100-200, the particle size of the alumina micro powder is 1-5 [mu] m, the diameter of the carbon nanotube whisker is 5-20 nm, the length is 1-5 [mu] m, and the particle size of the graphene quantum dot is 2-10 nm; all the raw materials are synergistically matched, so that the material is expected to have high thermal conductivity and excellent insulating property and is suitable for the field of electric power engineering. The material has high thermal conductivity and excellent insulativity, the thermal conductivity coefficient is not lower than 5 W / (m.K), the volume resistivity is not lower than 1015 omega.cm, and the breakdown field strength is not lower than 30 kV / mm.

The invention belongs to the technical field of magnetism isolating plates, and particularly relates to a novel magnetism isolating plate which comprises a composite plate, the composite plate is composed of an outermost wear-resistant and corrosion-resistant protective layer, a middle high-permeability magnetism isolating material layer and an inner buffer layer in good contact with protected equipment, and the outermost wear-resistant and corrosion-resistant protective layer can be made of PTFE (polytetrafluoroethylene). The surface of the magnet vane is covered with the coating in a spraying or dipping mode, a uniform protective layer is formed, and the thickness of the uniform protective layer is usually 20 microns 300; and the middle layer of high-permeability magnetic isolation material layer is permalloy composed of 45 N i-Fe alloy containing 45% of nickel and 80 N i-Fe alloy containing 80% of nickel. According to the invention, the outermost layer is wear-resistant and corrosion-resistant, such as a PTFE or aluminum oxide ceramic layer, so that the interior is protected; the middle high-permeability magnetic isolation material layer effectively isolates a magnetic field; the inner buffer layer provides buffer, the buffer holes disperse stress and absorb energy and buffer, and the interval grooves enhance the fitting degree, so that stable operation of equipment in various complex environments is ensured jointly, and the service life of the magnet vane and the service life of the equipment are prolonged.

The invention provides a hierarchical porous silicon material and a preparation method thereof, and belongs to the technical field of comprehensive utilization of fly ash. The preparation method of the hierarchical porous silicon material provided by the invention comprises the following steps: mixing fly ash and an activating agent, and calcining to obtain activated fly ash; the activating agent comprises at least one of sodium salt and potassium salt; and mixing the activated fly ash with hydrochloric acid, and carrying out acid etching to obtain the hierarchical porous silicon material. According to the invention, at least one of sodium salt and potassium salt is adopted to activate the fly ash, and at least one of Na < + > and K < + > in the activation process can promote the conversion of mullite in the fly ash to different mineral phase aluminosilicate, so that a nepheline structure of Na and / or K is formed; and then hydrochloric acid is adopted for acid etching, and the alumina component can be selectively etched, so that the hierarchical pore channel is constructed, the process is simplified, and template-free preparation of the hierarchical pore silicon material is realized.

The invention discloses a tundish cover castable, and relates to the technical field of tundish refractory materials. The tundish cover castable is prepared from the following raw material components in percentage by mass: 7.8 to 9.6 percent of alumina of 8 to 5mm, 2.6 to 4.3 percent of alumina of 5 to 3mm, 2.6 to 4.3 percent of alumina of 1 to 0mm, 17.4 to 20.8 percent of alumina of 200 meshes, 9.6 to 13 percent of mullite of 5 to 3mm, 22.6 to 26 percent of mullite of 3 to 1mm, 9.6 to 13 percent of mullite of 1 to 0mm, 7 to 8.7 percent of mullite of 200 meshes, 2.6 to 3.5 percent of composite binding agent, 0.8 to 1.7 percent of aluminum silicate, 0.05 to 0.07 percent of SiC nanowire, 0.2 to 0.3 percent of aluminum titanate and the balance of water. The invention discloses a tundish cover castable which comprises the following components in percentage by weight: 0.4-0.7% of alumina micro powder, 0.08-0.11% of sodium tripolyphosphate, 2.6-3.5% of silica fume, 0.87% of steel fiber and 1.3-1.7% of high-alumina cement. Compared with a traditional process, the tundish cover castable has the advantages that the overall performance of the tundish cover castable is remarkably improved, the breaking strength and compression strength of the castable are effectively enhanced, the service life is remarkably prolonged, and the production cost is reduced. And the production cost is greatly saved, and the economical efficiency and the operation rate of continuous casting operation are improved.

The invention belongs to the technical field of refractory materials, and discloses a high-temperature high-strength ceramic wear-resistant castable as well as a preparation method and a construction method thereof. The high-temperature high-strength ceramic wear-resistant castable is prepared from the following raw materials in percentage by mass: 14 to 22 percent of mullite with the particle size of 8 to 5mm, 16 to 24 percent of mullite with the particle size of 5 to 3mm, 13 to 18 percent of brown aluminum oxide with the particle size of 3 to 1mm, 12 to 19 percent of brown aluminum oxide with the particle size of 1 to 0.074 mm, 16 to 25 percent of brown aluminum oxide with the particle size of less than or equal to 0.074 mm, 3 to 7 percent of activated aluminum oxide powder, 4 to 7 percent of submicron SiO2 powder and 0.3 to 0.6 percent of pure calcium aluminate cement, and rare earth modified titanium-aluminum alloy fibers accounting for 1-1.5% of the total mass of the raw materials, a water reducing agent accounting for 0.05-0.15% of the total mass of the raw materials, explosion-proof fibers accounting for 0.03-0.1% of the total mass of the raw materials and water accounting for 3.5-4.5% of the The submicron SiO2 powder is used as a binding agent to endow the castable with certain normal-temperature strength, the activated alumina powder is combined to provide high-temperature strength, the brown fused alumina and the sintered mullite are used as aggregates, and the rare earth modified titanium aluminum steel fibers are combined to endow the castable with high-temperature, high-strength and wear-resistant properties.

The invention belongs to the technical field of metal surface treatment, and discloses a high-uniformity metal surface silver plating process and a corrosion-resistant treatment method thereof.The high-uniformity metal surface silver plating process comprises the following steps that firstly, pretreatment is conducted; step 2, activating treatment; step 3, pre-plating a bottom layer; step 4, electrosilvering; step 5, post-processing; according to the method, pre-plating of the bottom layer and electroplating of silver are combined, a layer of thin nickel or copper is pre-plated firstly, and then electroplating of silver is performed, so that the binding force and uniformity of the silver plating layer are effectively improved, and in the electroplating process, the mode of stirring and circulating the electroplating liquid is adopted, so that silver ions in the electroplating liquid are uniformly distributed, and the uniformity of the plating layer is improved; and a thin aluminum oxide protective film is deposited on the surface of the silver plating layer by adopting a chemical vapor deposition technology, so that the corrosion resistance of the silver plating layer is further improved.

The invention discloses stable zirconia high-toughness ceramic and a preparation method thereof.The stable zirconia high-toughness ceramic comprises a base material, a reinforcing phase and an interface transition zone, the base material is Y2O3-ZrO2 nano powder, the reinforcing phase comprises compact layers and porous layers which are alternately distributed, the compact layers enable alumina whiskers to be radially distributed in the radial direction, and the porous layers enable the alumina whiskers to be evenly distributed in the radial direction; a crystal whisker-nano particle-matrix three-stage toughening network is formed, a porous layer contains beta-Si3N4 crystal whiskers generated in situ, and an interface transition region is a ZrO2-beta-Si3N4 eutectic layer. According to the invention, the whisker is added, the fracture energy is consumed through the pull-out effect, the nano-particles inhibit crack propagation through the pinning effect, the matrix phase change is toughened, the fracture toughness of the ceramic is improved, and the crack propagation path is prolonged by 3-5 times. On the other hand, the sintering temperature is reduced, so that energy consumption is reduced.

The invention provides a coating material suitable for a quartz product and a preparation method of the coating material. The water-based coating material comprises a normal-temperature film-forming medium, a high-temperature film-forming medium, a ceramic functional additive and deionized water, the normal-temperature film-forming medium comprises a thickening binder, a dispersing agent, a defoaming agent and a flatting agent; the high-temperature film forming medium comprises low-melting-point glass powder and a high-temperature binder; the ceramic functional additive comprises silicon nitride, silicon carbide, aluminum oxide and zirconium oxide powder. The low-melting-point glass powder and the ceramic functional additive can improve the adhesive force, compactness and mechanical performance of the coating and adjust the expansion coefficient of the coating, and the room-temperature film forming medium can adjust the viscosity, fineness and the like of the coating material. And the binding force and compactness between the coating material and the quartz product can be ensured. The coating can effectively protect the quartz product, prevent erosion and stress damage of other physical or chemical processes to quartz, and prolong the service life of the quartz product.

The invention belongs to the technical field of conductive ceramics, and discloses a silicon nitride conductive ceramic material and a preparation method thereof.The method comprises the steps that a yttrium oxide, aluminum oxide and magnesium oxide ternary composite system is arranged, rare earth elements are doped, and a sintering aid is formed; a resistance adjusting agent is composed of a titanium nitride-titanium dioxide core-shell structure and silicon carbide fibers, and the silicon carbide fibers are directionally distributed and arranged in a magnetic field, so that efficient composition of the silicon nitride conductive ceramic material is achieved, and the effects of high bending resistance, high conductivity and low sintering temperature are achieved; forming the slurry; performing spark plasma sintering; conducting network directional regulation and control; the preparation method comprises the steps of raw material mixing and ball milling, post-treatment and performance optimization, a convenient preparation process can be formed, too many tedious steps are not needed, a ball mill used in raw material mixing and ball milling is further provided with a pre-grinding device for pre-grinding the materials, the subsequent ball milling quality is enhanced, and the situation that the materials are not completely ground is avoided.

The invention provides a black aluminum oxide ceramic material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing aluminum oxide, magnesium oxide, silicon dioxide, iron oxide, manganese oxide, chromium oxide and a solvent to obtain an aluminum oxide ceramic mixed solution; (2) mixing the alumina ceramic mixed solution with a binder, and grinding to obtain alumina ceramic powder; and (3) carrying out cold pressing treatment on the aluminum oxide ceramic powder, and carrying out vacuum pressureless sintering treatment to obtain the black aluminum oxide ceramic material. The black aluminum oxide ceramic material prepared by the method disclosed by the invention is relatively small in crystal grain, relatively small in pore and relatively high in density, and has relatively high compactness and thermal conductivity.

The invention provides a design method and a preparation method of a 1.8-4 [mu] m silicon-based lens anti-reflection film. The design method of the 1.8-4 [mu] m silicon-based lens anti-reflection film comprises the steps that Sa, a film system is designed with 550 nm as the reference wavelength of optical film design, a film stack formula Sub / 0.3 M 0.8 N (HL) 3K / AIR is used, the two faces of Sub are plated with the same film system, Sub is a silicon substrate, AIR represents air, in the film stack formula, H represents a high-refractive-index material ZnS with the 1 / 4 wavelength thickness, L represents a low-refractive-index material YbF3 with the 1 / 4 wavelength thickness, and in the film stack formula, Z represents a high-refractive-index material ZnS with the 1 / 4 wavelength thickness; m represents a base layer material SiO with the thickness of 1 / 4 wavelength, N represents a connecting layer material Ge with the thickness of 1 / 4 wavelength, K represents protective layer materials Al2O3 (aluminum oxide) and Sb with the thickness of 1 / 4 wavelength, and a film layer structure of Sub / SiO / Ge / ZnS / YbF3 / Al2O3 / Air is generated through an input film stack formula; sc, the thickness of the film layer is optimized through thin film design software, the optimal thickness of the film layer is obtained, and the transmittance of the 1.8-4-micron wave band of the optimized film layer structure meets the requirement; and Sd, the optimized film layer thickness is input into a control computer of the coating machine.

The invention relates to the technical field of round bin building construction, in particular to an aluminum oxide bin upside-down construction method. S1, measuring and positioning the top surface of the completed foundation; and S2, the annular bottom plate is installed and fixed to the top face of the foundation. And S3, a center cylinder temporary fixing support is arranged on the top face of the foundation. And S4, the first circle of wall plates are assembled and fixed. And S5, assembling of the silo top structure is completed. And S6, a plurality of hydraulic jacking devices are evenly distributed around the inner circumference of the foundation. And S7, the hydraulic jacking device is operated to synchronously jack the first circle of wall plate. And S8, the next circle of wall plates are assembled and welded in the new assembling space. And S9, the hydraulic jacking device is operated to enable the supporting block to descend to the bottom, and a bracket is welded to the lower portion of the next circle of wall plate. And S10, the steps of jacking, assembly welding, supporting block descending and bracket welding are repeated. According to the construction method, the construction sequence of firstly assembling the warehouse top, then jacking the warehouse top circle by circle and inversely installing the wall plates is adopted, so that the safety risk caused by erecting a high-altitude scaffold in a traditional forward installation method is effectively avoided.

The invention relates to chemical-corrosion-resistant full-polished glaze as well as a preparation method and application thereof, and belongs to the technical field of ceramic production and manufacturing. The chemical-corrosion-resistant fully-polished glaze comprises the following mineral components in percentage by mass: 5%-10% of quartz, 5%-10% of kaolin, 1%-10% of calcined talc, 20%-25% of wollastonite, 10%-20% of calcined kaolin, 1%-5% of calcined alumina, 1%-5% of calcined zinc oxide, 1%-5% of barium carbonate, 1%-3% of titanium oxide, 1%-5% of zirconium silicate and 10%-20% of boron frit. By specially designing a full-polishing glaze formula of the ceramic tile, adjusting the firing temperature and discharging or reducing defects such as air holes in a glaze layer as much as possible, the glaze layer forms a stable inert surface, and chemical substances cannot react with the glaze layer or only slightly react with the glaze layer, so that the transparency, integrity and glossiness of the surface are kept.

The invention belongs to the technical field of coatings, and discloses a preparation method and application of a low-temperature fast-curing coiled material powder coating, and the preparation method comprises the following steps: S1, adding raw materials of the low-temperature fast-curing coiled material powder coating into a high-speed mixer, and mixing for 5-8 minutes at the rotating speed of 1200-1600r / min to ensure that the components are uniformly dispersed; s2, adding the mixture into a double-screw extruder for melt extrusion, wherein the temperature of the double-screw extruder is 80-90 DEG C in a first area, 100-110 DEG C in a second area, 120-130 DEG C in a third area and 110-120 DEG C in a fourth area, and the rotating speed is 200-250 r / min; s3, tabletting and cooling to 40 DEG C or below, after coarse crushing, adopting an ACM pulverizer and a grading screen of 80-120 meshes to obtain the low-temperature fast-curing coiled material powder coating, low-temperature curing and fast film forming are achieved through component cooperation, the process adaptability is high, meanwhile, functional filler modified sericite and modified nanometer aluminum oxide are added, and the low-temperature fast-curing coiled material powder coating is prepared. The two synergistically enhance the corrosion resistance, mechanical strength and environmental adaptability of the powder coating paint film.

The invention relates to an alkali-activated solid waste cementing repair material and a preparation method thereof, and belongs to the technical field of solid waste resource utilization and building materials. The repairing material is prepared from the following raw materials in parts by weight: 30 parts of fly ash, 70 parts of blast furnace slag, 40 parts of machine-made sand, 45-50 parts of water, 7-13 parts of an exciting agent, 1-2 parts of sodium tetraborate, 1-2 parts of calcium oxide, 1-2 parts of magnesium oxide, 1-2 parts of calcium sulphoaluminate, 0.5 part of aluminum oxide, 0.2 part of aluminum potassium sulfate, 0.2 part of aluminum powder, 0.2 part of alunite and 1 part of polyethylene glycol. By optimizing the modulus of the exciting agent, the alkali content, the water-binder ratio and the admixture ratio, the material has the shrinkage-compensating and micro-expansion characteristics, the compressive strength of the material in one day reaches 25-30 MPa, the compressive strength in three days reaches 30-35 MPa, the compressive strength in seven days reaches 35-40 MPa, the compressive strength in 28 days reaches 45-50 MPa, the initial fluidity and the 30min fluidity meet the standard requirements, and the expansion rate is 0.1%. The concrete is completely prepared from industrial solid wastes, does not contain cement clinker, has excellent volume stability and durability, is suitable for repairing roads, bridges and building structures, and is particularly suitable for severe environments such as high humidity, salt mist, freeze thawing and the like.

The invention relates to the technical field of soft light bricks, in particular to an environment-friendly wear-resistant soft light brick and a preparation method thereof, and the environment-friendly wear-resistant soft light brick comprises the following components in parts by mass: 20-40 parts of quartz, 30-60 parts of waste slag micro powder, 10-25 parts of feldspar, 10-20 parts of kaolin, 5-15 parts of clay, 5-15 parts of talc, 5-15 parts of lamellar alumina, 1-5 parts of a sintering aid and 0.5-3 parts of a binder. According to the environment-friendly and wear-resistant soft light brick and the preparation method thereof, the waste slag micro powder and the lamellar alumina are combined with other components, a traditional single aggregate reinforcing mechanism is broken through, a two-time sintering process is used during preparation, a glaze surface and a green body are combined more firmly, the surface texture is more uniform, and the soft light effect controllability is high.

The present invention discloses a formula for high-temperature lightweight mullite bricks and a firing process thereof, relating to the technical field of refractory materials. According to the invention, by weight, the following components are included: 40-44 parts of alumina, 18-24 parts of cyanite, 10-15 parts of soft clay, 18-23 parts of high-temperature mullite, 25-35 parts of sawdust, 15-23 parts of burn-out polyethylene balls and a reinforcing agent; the sawdust is used to form microscopic air channels and reinforce the pores; the sintering temperature of the mixture is 1200°C-1800°C; the reinforcing agent is quartz powder; to solve the problem of the low strength of the lightweight heat-insulating refractory materials prepared by the burn-out method.