31 results about "Cordierite" patented technology

This invention discloses a high-strength ceramic valley-peak structured corrugated filler, the raw materials of which include clay, kaolin, potassium feldspar powder, cordierite powder, zirconium dioxide powder, reinforcing granular powder, bauxite, and a binder. The corrugated filler material prepared by the method described in this invention has good strength, making it less prone to breakage during stacking or use, thus improving the usability and durability of the corrugated filler.

The application discloses a low-temperature toughened honeycomb adiabatic catalytic component and a preparation method and application thereof, and belongs to the technical field of new energy catalytic materials. The component is based on cordierite, is compounded with 3Y stable zirconium oxide, nano-aluminum oxide and a low-temperature borosilicate glass composite system, is formed by low-temperature segmented sintering at 1280 DEG C, and stainless steel fiber doping is abandoned, so that the toughness of the matrix is significantly improved. A gamma-Al2O3 composite transition layer and a Cu-Mn-Ce-Zr-La non-noble metal catalytic active double-layer coating are arranged on the inner wall of the pore, the coating has strong bonding force and high specific surface area. The application solves the problems of traditional honeycomb ceramic high-temperature sintering, high-temperature failure of metal reinforcing phase, weak low-temperature catalytic activity, easy peeling of the coating and the like, and the preparation process is simple and easy to mass produce. The product is suitable for coal underground in-situ gasification 180-280 DEG C low-temperature halogen adiabatic catalytic working conditions, is used for flue gas reforming, hydrogenation cracking and oil component regulation, has the advantages of low cost, thermal shock resistance, long-term stability and the like, and has strong industrial practicability.

The application discloses a kind of fused cast beta-corundum brick and preparation method thereof, belong to refractory material technical field.The fused cast beta-corundum brick is prepared by Ni (NO3) 26H2O, Co (NO3) 26H2O, alpha-Al2O3, Na2CO3 as raw material, by fusion casting method;Preparation steps include: preparation Ni (NO3) 26H2O and Co (NO3) 26H2O composite salt solution and infiltrate alpha-Al2O3 with Na2CO3 powder, by spray drying, ball milling, screening and obtain mixed powder;Preheat high-purity graphite crucible after charging, high-purity argon is imported, stage heating is kept to 1950-2050 DEG C, pouring is kept to preheating mould, finally cooling annealing and with furnace cooling to room temperature and obtain fused cast beta-corundum brick.The fused cast beta-corundum brick prepared by optimizing raw material ratio, fusion casting and annealing process parameters is stable in performance, preparation method process controllable, good repeatability, with good application prospect.

This invention relates to the field of glaze technology and discloses a high-strength antibacterial ceramic glaze and its preparation method. The high-strength antibacterial ceramic glaze is composed of the following raw materials in parts by weight: 30-40 parts by weight of kaolin, 5-15 parts by weight of potassium feldspar, 5-15 parts by weight of sodium feldspar, 6-10 parts by weight of talc, 3-8 parts by weight of corundum, 5-10 parts by weight of cordierite, 5-10 parts by weight of dolomite, 2-5 parts by weight of modified cerium-based MOF, and 2-5 parts by weight of modified organopolysilazane. This application achieves the purpose of dispersing the glaze by using modified organopolysilazane, and at the same time utilizes the Si-O-N ceramic formed during sintering to improve the strength of the glaze. By preparing a modified cerium-based MOF, the long-term antibacterial performance of the glaze is improved. The glaze prepared by this application has excellent strength and long-term antibacterial performance.

This invention relates to the field of honeycomb ceramic technology, specifically to a thin-walled cordierite honeycomb ceramic material with high porosity and narrow pore size distribution, and its preparation method. The inorganic solid component exhibits a lamellar, narrow-particle-size distribution with high iron content and a talc aspect ratio greater than or equal to 20; the sphericity of both spherical alumina and spherical silica is greater than or equal to 98%, and the mass percentage of the amorphous phase in the spherical silica is greater than or equal to 99.0%; the morphology of the shaped coarse silicon carbide particles is ellipsoidal, with a particle size D... 50 The particle size is 25-35 μm, D. 90 With particle size D 10 The ratio is less than or equal to 3.0 μm. By using shaped coarse silicon carbide instead of expensive organic pore-forming agents, high porosity can be achieved with only a small amount, significantly reducing raw material costs. By controlling the particle size distribution of the raw materials, the micropore distribution is significantly narrowed, meeting the stringent requirements for high PN capture efficiency and low back pressure.

A cementitious composition, including for the molding of relatively light-weight, heat-insulative, nailable, structural units such as bricks, blocks, roof decking, etc. The composition may include an inorganic cementitious settable admixture within which is incorporated a significant proportion of waste industrial products, such as concrete, blacktop, windmill blades, brick chips, plastics, cordierite, tires, stack dust and / or fly ash, ceramics, clays, metals and plastics. The waste industrial products may be incorporated into the composition in various proportions.

This invention discloses a low-temperature fired, zirconium-free, low-expansion opacifying glaze, which is formed by adhering the glaze to a sanitary ceramic body and then firing it. The glaze does not contain zirconium silicate opacifier and belongs to a zirconium-free glaze system. The glaze comprises dry materials and additives. The dry materials include the following components: 20-40 parts potassium feldspar, 5-20 parts calcined talc, 20-50 parts cordierite, 10-30 parts calcined alumina, 3-15 parts washed kaolin, 5-20 parts calcite, 4-15 parts zinc oxide, and 2-10 parts tricalcium phosphate. This invention also discloses a method for preparing the above-mentioned low-temperature fired, zirconium-free, low-expansion opacifying glaze. The present invention discloses a low-temperature fired zirconium-free, low-expansion opaque glaze and its preparation method. Tricalcium phosphate is used as a phase separation inducer and zinc oxide is used as a zinc source. During the firing process, the glaze undergoes submicron-level phase separation and in-situ zinc spinel formation reaction, which, together with the cordierite crystal phase, achieves dual regulation of opacity whiteness and low thermal expansion performance, thus constructing a zirconium-free glaze system.

Porous ceramic structure (1), comprising: a porous structural body consisting primarily of cordierite; and Manganese and tungsten, which are firmly bonded to the structural body, whereby the manganese and the tungsten are components of a metal oxide particle (2) that is firmly connected to the interior of a pore (121) of the structural body, and the metal oxide particle (2) has: a firmly connected section (21) located within the structural body; and a protrusion (22) adjacent to the firmly connected section (21) and extending into the pore.

This invention discloses a diesel engine catalyst based on high-entropy oxides and modified adsorbents, and its preparation method. The catalyst uses PtCeFeMnCoO5 high-entropy oxide nanoparticles as the main catalytic active component, supplemented by Cu-Fe modified hydrotalcite-derived composite oxides, CeO2, ZrO2, γ-Al2O3, and cordierite honeycomb ceramic support. The PtCeFeMnCoO5 high-entropy oxide nanoparticles, as the main catalytic active component, possess advantages such as sulfur resistance, heat resistance, and low cost. The internal five-membered metal oxides synergistically enhance the catalyst's catalytic activity and extend the high-activity temperature window. The pre-adsorption and subsequent gelation preparation method based on a carbon black adsorption matrix significantly improves the dispersion effect of the five-membered high-entropy oxide precursor, increases the number of adsorption / catalytic active sites of the five-membered high-entropy oxide, enhances the overall NOx purification performance of the LNT catalyst, and achieves precious metal reduction. The modified hydrotalcite-derived composite oxides replace the Al2O3 coating additive, significantly improving the NOx adsorption capacity of the LNT catalyst.

The invention relates to an environmentally friendly heating system that increases energy efficiency by using carbon heat paint, nanofluid technology, and cordierite plates. Carbon heat paint optimises energy consumption by heating both the air and objects in both directions, while the nanofluid increases heat transfer performance. Cordierite plates minimise energy losses by retaining heat for extended periods owing to their high thermal resistance and low expansion properties. This sustainable heating system can be customised to user requirements, offering a more environmentally friendly solution than traditional methods by providing high efficiency at low cost.

This invention discloses an insulating ceramic material for an electric heating film substrate and its preparation method. Using corundum sand, talc, magnesium carbonate, clay, barium carbonate, etc., as raw materials, the process involves batching, ball milling, re-batching, ball milling and uniform mixing, adjusting the slurry, plaster mold casting, drying, and firing to obtain a high-temperature insulating composite ceramic material product with a resistivity negative temperature coefficient far less than cordierite. The material obtained by this invention achieves a room temperature resistivity of 10. 14 Order of magnitude, ≥1×10 at 1000℃ 5 Ωm, flexural strength ≥100MPa. Coefficient of thermal expansion approximately 2×10⁻⁶. ‑4 / ℃ (25℃~1000℃), the product can be used to prepare substrates for electric heating films and other products, with a maximum heating temperature of 1000℃.

The application discloses an erosion-resistant ceramic crucible containing magnesium oxide for smelting of aluminum-lithium alloy and a preparation method thereof, and belongs to the technical field of refractory materials. White corundum, cordierite, Cr2O3, BaF2, CaF2, ZrO2 and TiO2 are mixed to form premix; after the premix, mixed additives, water and grinding balls are mixed and ground, the mixed slurry is obtained through aging; the mixed slurry is poured into a gypsum mold to be dehydrated to obtain a green body, the green body is sequentially subjected to drying treatment and isostatic pressing treatment to obtain a pretreated green body; and the pretreated green body is sequentially subjected to vacuum sintering and plasma spraying to obtain the erosion-resistant ceramic crucible. The erosion-resistant ceramic crucible prepared by the application has good resistance to aluminum-lithium alloy erosion when smelting the aluminum-lithium alloy.

A setter for firing according to the present invention is formed by providing a mullite-containing layer that includes mullite on an SiC substrate. The cordierite content of the mullite-containing layer is 3–50 mass% and / or the potassium content of the mullite-containing layer is 1–5 mass%.

The present invention provides a cordierite sintered body, a method for producing the same, a composite substrate, and an electronic device, the cordierite sintered body having a ratio of a sum of intensities of the largest peaks of each component other than the cordierite component to the peak top intensity of the (110) plane of the cordierite in an X-ray diffraction pattern in a range of 0.0009 to 0.0020, and a bulk density in a range of 2.497 to 2.507 g / cm 3 In the cordierite sintered body, heterophases other than the cordierite component are extremely small, and thus the surface flatness when the surface is polished to a mirror surface is high.

The application provides a high-strength and high-toughness heat-conducting cordierite ceramic and a preparation method thereof, and belongs to the technical field of ceramics. The preparation method comprises the following steps: preparing silicon carbide nanofibers, preparing boron nitride nanofibers, preparing mixed powders, forming and post-treating. In the step of preparing the mixed powders, magnesium oxide, aluminum oxide and silicon oxide powder are uniformly mixed, mixed fibers are added, and after uniform stirring, ball milling treatment is performed, the ball milling time is 6-8h, the ball-to-material ratio is 5-10:1, the ball milling rotating speed is 200-300rpm, and after the ball milling is completed, drying is performed to obtain the mixed powders. The cordierite ceramic prepared by the application has high strength and toughness, good heat-conducting performance, excellent chemical resistance and stability.

This invention relates to the field of honeycomb ceramic technology, specifically to a high-porosity, high-strength, ultrathin-walled cordierite honeycomb ceramic and its preparation method. In its main component, the talc with a narrow, lamellar particle size distribution has an Fe2O3 mass percentage ≥1.5%, an aspect ratio ≥10, and a particle size D... 97 The particle size is ≤30μm; the sphericity of both spherical alumina and molten spherical silica is ≥98%, and the mass percentage of the amorphous phase in molten spherical silica is ≥99.5%; the pore-forming agent is ultrafine silicon carbide powder. By limiting the morphology and particle size, the raw materials have excellent flowability and packing characteristics, effectively solving the technical problems of difficult molding and low green strength of high-pore-density ultrathin-walled honeycomb ceramic carriers; ultrafine silicon carbide powder replaces traditional organic pore-forming agents, and can decompose and volatilize during the low-temperature firing stage, significantly reducing the risk of firing cracking, improving the product qualification rate, and avoiding the problem of large-diameter defects caused by organic pore-forming agents.

This invention belongs to the field of cordierite powder technology, specifically relating to a low-expansion-coefficient cordierite powder and its preparation method. The low-expansion-coefficient cordierite powder is prepared from raw materials comprising the following mass fractions: MgO 13.7–16.0 wt%, Al₂O₃ 31.5–33.4 wt%, SiO₂ 50.0–50.9 wt%, colorant 0.5–2 wt%, and thermal expansion regulator 0.5–2 wt%. The low-expansion-coefficient cordierite powder of this invention has a thermal expansion coefficient approaching zero at room temperature; the sintering range is increased, which is beneficial for sintering densification, with a maximum density of 99.9%; the brightness coefficient is between 50 and 70, providing balanced light reflection and absorption, which is beneficial for the precision of semiconductor equipment manufacturing. The preparation method of this invention has a novel and reasonable process route, is easy to control, and optimizes the preparation parameters, resulting in high sintering activity and densification; the process route of this invention is reasonable, the equipment is mature and stable, the preparation efficiency is high, it is suitable for the stable batch preparation of cordierite powder, and the cost is low.

This invention relates to a porous ceramic body and its preparation method, a heating element, an atomizer, and an electronic atomization device. The porous ceramic body is made of one or more of quartz ceramic, cordierite ceramic, and diatomaceous earth ceramic, and the pore size of the porous ceramic body satisfies: d 50 The value ranges from 5 μm to 50 μm, and β ranges from 0.17 to 0.55, where β = (d 50 -d 10 ) / d 50 The aforementioned porous ceramic body makes the electronic atomizing device less prone to splattering and dry burning, thus improving the user experience.

This invention belongs to the technical field of functional coating materials, and relates to a transparent high infrared emissivity composite coating material and its preparation method. The preparation steps of the composite coating material are as follows: cordierite powder and a transparent polymer are uniformly mixed in a solvent to form a composite slurry; the composite slurry is coated onto the surface of a substrate, and after drying and curing, a transparent high emissivity composite coating is obtained; the content of cordierite powder in the composite coating is 20w%-40 wt%. This invention achieves synergistic optimization of infrared emissivity and visible light transmittance by optimizing the content of cordierite filler in the transparent polymer matrix. The composite coating exhibits an infrared emissivity >0.9 in the 8-14 μm band and >0.95 in a local band, while the average transmittance in the 380-780 nm visible light range is 55%-75%. This material possesses excellent thermal stability, chemical stability, and mechanical properties, and the preparation process is simple and low-cost.

A reticle stage short stroke device can be made from a cordierite body. The cordierite body is polished and then a layer of silica coating or ultra-low expansion (ULE) glass is deposited. After thinning and polishing the deposited layer, an optical device is positioned on the layer. The optical device can be made from Zerodur® and forms an optical contact with the silica or ULE glass layer. The optical device then holds a reticle clamp and an encoder scale and reference.

This invention provides a cordierite ceramic with a gradient pore structure and its preparation method, relating to the field of porous cordierite ceramics. The preparation method of the cordierite ceramic with a gradient pore structure includes the following steps: adding alumina, magnesium oxide, and silica to a polymer dispersion containing polyvinyl alcohol microspheres, ball milling until uniform, then adding functional additives and ball milling until uniform to obtain a phase inversion slurry; the polymer dispersion containing polyvinyl alcohol microspheres is prepared by uniformly dispersing polyvinyl alcohol in a mixture of polyphenylene ether sulfone, N-methylpyrrolidone, and polyvinylpyrrolidone. This invention effectively avoids uneven pores or closed pores during sintering, achieving a uniform and controllable pore size distribution, low closed-pore rate, and enabling gradient changes in porosity, simultaneously improving porosity and flexural strength. It also avoids cracking or deformation of the green body after phase inversion, improving process stability.

This invention relates to the technical field of ceramic materials, specifically to a high-strength, high-thermal-shock-resistant ceramic material, its preparation method, and its applications. This application discloses a high-strength, high-thermal-shock-resistant ceramic material comprising the following components by weight percentage: Al2O3: 92-96%, SiO2: 1-5%, CaO: 0.5-1.5%, MgO: 0.05-0.5%; the high-strength, high-thermal-shock-resistant ceramic material has a cross-section with micropores of 5-30 μm and a porosity of 1%-3%. The high-strength, high-thermal-shock-resistant ceramic material of this application improves the thermal shock resistance of alumina ceramics by adding appropriate amounts of sintering aids, pore-forming agents, and dopant phases; simultaneously, through a specific glass-alumina reaction, the sintering temperature is lowered to promote sintering, and the alumina particles are wetted, enhancing the grain boundary bonding strength; furthermore, the addition of cordierite, with its low coefficient of thermal expansion, adjusts the coefficient of thermal expansion of the material, further improving its thermal shock resistance.

The application belongs to the technical field of plastic preparation, and particularly relates to a polypropylene composite material and a preparation method thereof. The polypropylene composite material provided by the application comprises the following raw materials in mass fractions: 65-75 parts of polypropylene, 18-22 parts of filler master batch, 2-4 parts of compatilizer and 0.2-0.3 parts of antioxidant; the filler master batch comprises functional additives and acrylate elastomers wrapping the functional additives; the functional additives comprise modified silicon micro powder, modified kaolinite, talcum powder and cordierite; the modified silicon micro powder comprises silicon micro powder coated with a silane coupling agent; and the modified kaolinite comprises kaolinite coated with a silane coupling agent. The polypropylene composite material provided by the application simultaneously has the advantages of high flexural modulus, high impact strength and high heat distortion temperature.

This invention belongs to the field of infrared radiation materials technology, specifically relating to a modified titanium dioxide-cordierite infrared emitting composite material, its preparation method, and its application. Rutile titanium dioxide powder is selected as the raw material and subjected to high-temperature calcination at 900-1100°C for 2-4 hours, with furnace cooling to allow the material to complete crystal structure rearrangement under thermodynamically stable conditions. This process effectively eliminates lattice defects, improves crystal integrity, and promotes the complete transformation of the residual anatase phase to the rutile phase, thereby obtaining a structurally stable and uniformly composed modified titanium dioxide powder. Based on this, the modified titanium dioxide and cordierite raw material are mixed in a predetermined ratio and uniformly dispersed by ball milling or mechanical stirring. After molding, the mixture is sintered at 1200-1400°C to finally prepare a dense composite ceramic material with good interfacial bonding.

This invention discloses an ultra-low dielectric constant (LTCC) material and its preparation method, which is composed of a glass phase and a ceramic filler phase. The glass phase consists of Li2O, La2O3, SiO2, ZrO2, P2O5, MgF2, and Al2O3. The ceramic filler phase includes BaB2O4 and a modifier, wherein the modifier is at least one of Al2O3, SiO2, or cordierite. This invention achieves co-firing with silver / copper electrodes at low temperatures by combining Li-La-Si glass with BaB2O4 filler in a specific ratio, and exhibits excellent thermal stability and environmental friendliness, meeting the requirements of high-frequency communication applications such as 5G millimeter wave for high-performance substrate materials.

The application discloses a kind of lithium battery positive electrode material sintering with double-layer composite reactor and preparation method thereof, belong to the technical field of reactor kiln furniture preparation, reactor includes matrix layer and facing layer, the mass percentage of each raw material of matrix layer includes: cordierite 20~30%, talcum powder 0~10%, mullite 20~22%, tabular corundum 18~20%, active alumina 12~18%, lithium feldspar 6~8%, guangxi white mud 4~8%;Add binder to the total mass percentage of the matrix layer 4~8%;The mass percentage of each raw material of facing layer includes: high-purity SiC-Si3N4 35~45%, zirconium mullite 15~20%, lithium feldspar 15~20%, active alumina 12~18%, guangxi white mud 4~8%;Add binder to the total mass percentage of the facing layer 4~8%.The above-mentioned double-layer composite reactor provided in the application can maintain stable structure and performance under high temperature environment, effectively resist the corrosive substances released in high-temperature sintering process, avoid the reactor surface skin, drop slag, ensure the purity and performance of positive electrode material.