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2010-4-23 · The mechanical behavior of cordierite-based porous bodies prepared by thermogelling of aqueous suspensions of a cordierite precursor mixture with potato or cassava starches was studied within a range of temperatures from RT to 1100 °C by using the diametral compression test. For both types of specimens, the response was rather different, with the disks prepared with potato starch exhibiting the …
Get Price2019-6-28 · The cordierite ceramic was fabricated using kaolin, silicon dioxide and magnesium oxide as the raw materials. It is found that after 1300 oC, cordierite phase becomes the main crystallization phase for all the samples. By reducing Al2O3 mole ratio, the mullite phase is consumed to produce cordierite phase, and the quartz phase still exists until 1400 oC. Besides, the shrinkage percent and bulk density decrease with Al2O3 mole ratio reducing from 2.0 to 1.4 while the open porosity increases. It is considered that the sintering activity of the raw materials at low temperature decreases due to the increase of chemically pure magnesium oxide and silica with the decrease of Al2O3 mole ratio, while the crystallization process and the cordierite …
Get Price2017-6-1 · Synthesis of cordierite refractory using the solid-state reaction method was performed in two steps, (i) preparation of silica from rice husk, (ii) preparation of alumina-cordierite with various ratios of cordierite to alumina.
Get Price2017-12-1 · The quantitative analysis of crystalline phases from XRD results using Rietveld method are presented in Table 2. The analysis showed that ceramics sintered at 1300 and 1400 °C have ~ 3.8–6.3 wt% and 12.6–13.2 wt% cordierite phases respectively.
Get Price2007-11-1 · The use of cordierite as porous support materials offers some possible advantages: (1) low fabrication cost including not only inexpensive raw materials which could be obtained from sintered natural clays, but relatively low heat treatment temperature because of its low melting point (1465 °C); (2) excellent resistance to thermal shock due to its low LTEC (theoretical value: (1.0–2.0) × 10 −6 °C −1 …
Get Price2018-11-30 · In this paper, the effects of mechanical activation along with TeO 2 addition on the formation of porous ceramics, densification, and reduction of the sintering temperature of cordierite ceramics were analyzed using a combination of dilatometric and DTA measurements. Isoconversional Ortega method was used to determine the relevant kinetic and thermodynamic parameters, allowing …
Get Price2008-5-7 · parameters and functional properties of cordierite based ceramic materials. A three-component oxide mixture was prepared containing MgO+Al2O3+SiO2 in the 2:2:5 ratio with the addition of 10% Bi2O3. Mixtures were mechanochemically activated 5 and 240 minutes in a mill with ceramic balls, and sintered at temperatures from 1173-1573K. Structural
Get Price2015-9-25 · Monolithic cordierite-based Fe/Al 2 O 3 catalysts were prepared using a sol-gel and impregnation method and characterized by N 2 adsorption, XRD, SEM, XPS, H 2-TPR, and an activity test for the reduction of NO with C 2 H 6. The results indicated that the textural properties, surface morphology, nanorod size, crystallinity, reducibility, and NO reduction activity of the catalysts were …
Get Price2020-8-18 · A brief description of the replica method is as follows. First, coating is done with ceramic slurry on the surfaces of the polyurethane foam templates, as shown in Fig. 3a. After squeezing to remove extra slurry, the polyurethane foam template is removed through a heat treatment and the ceramic slurry coated onto the template is sintered to form a three-dimensional structure similar to the …
Get Price2020-8-1 · Gel-casting is an innovative method to fabricate porous ceramics. Based on free radical polymerization of organic monomers and crosslinking agents under the action of initiator and catalyst, polymer with three-dimensional network will be formed and fixes ceramic powder into a certain shape.
Get Price2020-1-4 · The binder-free powders were compacted using the uniaxial double action pressing process in an 8 mm diameter tool (Hydraulic press Ring, P-14, Veb Thuringer). The applied pressure was 392 MPa and an amount of 0.3 g of powders was used for each pressed sample. The compacts were placed in an alumina boat and heated in a tube furnace (Lenton Thermal
Get Price2018-11-30 · Cordierite, with 2MgO + 2Al 2 O 3 + 5SiO 2 composition, is a ceramic material that possesses a low dielectric constant (~ 5) and low thermal expansion coefficient (20 × 10 −7 °C −1), making it useful in thermal shock applications, and as a carrier of electronic components as a dense ceramic material [1,2,3,4,5,6,7,8,9,10,11].Owing to its lower processing cost and better electrical ...
Get Price2007-11-1 · Cross-sectional micro-structures of the prepared porous cordierite were observed by using SEM (Scanning Electron Microscope; KYKY1010B, China). Porosity and bulk density were determined using the standard Archimedes method with distilled water as an immersion medium. All the measurements were conducted four times to get average values.
Get Price2015-11-27 · Since cordierite, 2MgO·2Al2O3·5SiO2 (MAS), is a very useful high-temperature ceramic material, it is important to decrease its sintering temperature. In order to accelerate the process of sintering, 5.00 mass% MoO3 was added to the starting mixtures. The mechanical activation of the starting mixtures was performed in a high-energy ball mill in time intervals from 0 to 160 min.
Get PriceIn this study, a series of cordierite monolith reactors coated with Ba 1-x Sr x CoO 3-δ /CeO 2 were prepared for CL-SMR. The CL-SMR reaction performance of the monolith oxygen carriers was tested in a fixed bed, and the temperature and the flow field of the reaction process were simulated using the computational fluid dynamics model.
Get Price2020-8-18 · Therefore, many researchers have studied reticulated porous ceramics using various raw materials, such as alumina, mullite, silicon carbide, cordierite and partially stabilized zirconia. However, there are few reports about reticulated porous ceramic based on kaolin, which is a low-cost raw material that can be sintered at low temperature.
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Get Price2017-6-1 · The XRD patterns of the samples with different alumina contents after sintered at temperature of 1230 °C are presented in Fig. 1a–g. The phases identified with the PDF diffraction lines using search-match method , clearly show the presence of α-cordierite/Mg 2 Al 4 Si 5 O 18 (PDF-13-0294) with the most intense peak at 2θ = 10.50°, spinel/MgAl 2 O 4 (PDF-21-11520), at 2θ = 36.91 ...
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Get Price2021-6-4 · After drying, the ceramic green bodies were fired with different temperatures ranging from 1100 to 1175oC for 3 h with a heating rate of 5oC/min. The pore formation and microstructure in the samples were characterized using FE-SEM, while bulk densities, porosities and water absorption were determined using the Archimedes method.
Get PriceToughened tetragonal polycrystalline zirconia ceramic. When an appropriate amount of stabilizer is added to zirconia, t-ZrO2 can be stored in a meta-stable state to room temperature. Its microstructure is characterized by tetragonal zirconia fine crystals accounting for the majority of the composition. This ceramic material is called tetragonal ...
Get Price2021-3-12 · However, blue-emitting Mg 2 Al 4 Si 5 O 18:Eu 2+ bulk composite can be also prepared by using the same method, while with the different PG composition, 2MgO–Al …
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Get Price2021-6-14 · CeaGoo is one of the most professional cordierite ceramics manufacturers and suppliers in China, specialized in providing high purity products. Please feel free to buy high performance cordierite ceramics made in China here and get free sample from our factory. Contact us for customized service.
Get PriceHoneycomb Cordierite Ceramic Parts. Cordierite ceramic is type of Alumina magnesia Silicate (Al4Mg2Si5O18). It offers excellent thermal shock resistance and high temperature resistance up to 1200°C. It also has extremely low thermal expansion coefficient and good mechanical strength.
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Get Price2010-4-23 · In this study, the high temperature mechanical behavior of cordierite porous disks prepared by the starch consolidation forming method was evaluated. In this method, due to the swelling and gelatinization properties of starch in aqueous suspension at a temperature between 55 and 85 °C, the starch granules perform as both consolidator/binder of the green body and pore former at high …
Get Price2018-11-30 · Cordierite, with 2MgO + 2Al 2 O 3 + 5SiO 2 composition, is a ceramic material that possesses a low dielectric constant (~ 5) and low thermal expansion coefficient (20 × 10 −7 °C −1), making it useful in thermal shock applications, and as a carrier of electronic components as a dense ceramic material [1,2,3,4,5,6,7,8,9,10,11].Owing to its lower processing cost and better electrical ...
Get Price2020-7-9 · Cordierite is a magnesium iron aluminum cyclosilicate with a nominal molecular formula of (Mg,Fe) 2 Al 3 (Si 5 AlO 18). Cordierite typically occurs in contact or regional metamor-phism of pelitic rocks. Natural cordierite is non-porous and is not useful for environmental technologies. Porous cordierite-based ceramics have been widely used as ...
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Get Pricesilicon carbide ceramic loop purpose manufacturing . Manufacturing of nano mullite-silicon carbide filters . 2020-7-1 · For this purpose, the effect of changes in the amount of silica nanoparticles on the viscosity and fluidity of ceramic slurry containing silicon carbide particles was investigated, and the effects of these particles on the density, porosity and compressive strength of ...
Get Price2007-10-17 · A method for laminating glass, glass-ceramic, or ceramic layers. The method comprises providing a first layer of glass, glass-ceramic, or ceramic, wherein the glass, glass-ceramic, or ceramic of the first layer is electromagnetic radiation-sensitive or has an electromagnetic radiation susceptor disposed on it; stacking a second layer of glass, glass-ceramic, or ceramic on the first layer; and ...
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Get Price2015-1-3 · Keywords: Cordierite, Sintering, MoO3, XRD, SEM. 1. Introduction Cordierite (2MgO-2Al2O3-5SiO2) is a technically important ceramic which is applied in a great variety of areas. Cordierite and cordierite based glass ceramics, well known because of their low dielectric constant, high resistivity, elevated thermal and chemical stability and
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Get Price2018-11-20 · The present invention provides a method for producing Cu67 radioisotope suitable for use in medical applications. The method comprises irradiating a metallic zinc-68 (Zn68) target within a sealed ceramic capsule with a high energy gamma ray beam. After irradiation, the Cu67 is …
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Get PriceCordierite occurs under fluid-absent conditions only at 5 kbar, 700°C and 10 kbar, ≤800°C, and under H 2 O-present conditions at 5 kbar, 900°C and 10 kbar, 800°C. The abundance of cordierite decreases with rising temperature and pressure. It forms large (10 μm) generally anhedral, relict grains.
Get Priceceramic composites in high-technology industries are reviewed. Current problems ... 2MgO * 2SiO2 5A1203(cordierite), AIN, TiN, ZrB2, BN, low-temperature and low-pressure ... method produced NS NS NS RS NS (PSZ) (713c) bending strength/MPa 440 1020 880 296 500 850
Get Price2016-7-13 · The problem of multi-scale modelling of damage development in a SiC ceramic fibre-reinforced SiC matrix ceramic composite tube is addressed, with the objective of demonstrating the ability of the finite-element microstructure meshfree (FEMME) model to introduce important aspects of the microstructure into a larger scale model of the component.
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Get PriceAn engine exhaust system disclosed which is designed to reduce hydrocarbon emissions caused by the evaporation of fuel from the fuel tank and by the inefficiency of combustion and catalytic conversion during cold engine start-up. This system utilizes molecular sieves, such as high-silica zeolites, which adsorb hydrocarbons evaporating from the fuel tank or emitted during engine start-up ...
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Get PriceCeramic clays are defined as medium to high plastic with different ranges of sintering temperatures, which makes them suitable for the production of various kinds of materials in the ceramic industry. [Projekat Ministarstva nauke Republike Srbije, br. OI-176016]
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Get PriceIn the ceramic honeycomb structure, a catalyst material used for burning carbon and containing silver dispersed into layered alumina is supported on an inner surface of the plurality of cells. Thus, the ceramic honeycomb structure can burn soot at low temperature using the supported catalyst material without corroding the honeycomb structure
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