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Journal articles on the topic 'Porous mullite ceramics'

Author: Grafiati
Published: 3 June 2025
Last updated: 31 July 2025

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1

Wu, Rina, Chaochao Wang, Guodong Xu, et al. "Preparation and Characteristics of Porous Mullite Ceramics by 3D Printing and In-Situ Synthesis." Materials 18, no. 5 (2025): 956. https://doi.org/10.3390/ma18050956.

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In-situ porous mullite ceramics with varying pore size and porosity were fabricated using 3D printing. The pore size was controlled by adjusting the size of polymethyl methacrylate (PMMA) microspheres. The effect of sintering temperature on phase evolution was also examined. Additionally, the impact of PMMA microsphere size and content on the rheological properties of the printing inks was investigated. The results indicated that alumina and microsilica fully transformed into mullite at 1550 °C. The influence of PMMA microsphere content and size on the porosity, mechanical properties, and ther
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2

Lin, Ya Mei, Cui Wei Li, Feng Kun Yang, and Chang An Wang. "Fabrication and Properties of Porous Anorthite⁄Mullite Ceramics." Key Engineering Materials 512-515 (June 2012): 590–95. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.590.

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Porous anorthite/mullite composite ceramics with different mullite content were fabricated by foam-gelcasting, using CaCO3, SiO2, α-Al2O3as raw material for anorthite phase and mullite powder for mullite phase. Effects of mullite powder content on bulk density, porosity, compressive strength and thermal conductivity of the porous composite ceramics were researched. It has been shown that mullite powder content has great effect on microstructure and properties of the porous anorthite⁄mullite composite ceramics. The open porosity of the prepared porous anorthite⁄mullite composite ceramics is in
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3

Mahnicka-Goremikina, Ludmila, Ruta Svinka, Visvaldis Svinka, et al. "Porous Mullite Ceramic Modification with Nano-WO3." Materials 16, no. 13 (2023): 4631. http://dx.doi.org/10.3390/ma16134631.

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Mullite and mullite–alumina ceramics materials with dominance of the mullite phase are used in different areas of technology and materials science. Porous mullite ceramics materials can be used simultaneously as refractory heat insulators and also as materials for constructional elements. The purpose of this work was to investigate the WO3 nanoparticle influence on the evolution of the aluminum tungstate and zircon crystalline phases in mullite ceramics due to stabilization effects caused by different microsize ZrO2 and WO3. The use of nano-WO3 prevented the dissociation of zircon in the ceram
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4

Lang, Ying, Chang An Wang, and Jun Zhou. "Fabrication and Properties of Mullite Fiber-Reinforced Porous Mullite Ceramics." Key Engineering Materials 512-515 (June 2012): 586–89. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.586.

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Porous mullite ceramics reinforced by mullite fiber have been prepared by vacuum filtering with MgO as sintering aid and starch as pore-forming agent. The influence of different sintering temperature and mullite fiber content on porosity and strength of porous mullite ceramics was investigated. The results showed that the compressive strength of the mullite ceramics increased with increasing sintering temperature. With the increase of mullite fiber content, the compressive strength of porous mullite ceramics appeared to increase at first and then decrease. And the peaking strength could reach
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5

Chao, Yang. "Study on the Properties of SiC/Mullite Porous Ceramics Based on ANSYS Numerical Simulation." Applied Mechanics and Materials 608-609 (October 2014): 976–80. http://dx.doi.org/10.4028/www.scientific.net/amm.608-609.976.

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In this paper, we use foam injection coagulation method to fabricate SiC/mullite porous ceramic with porosity 38-80%. In order to study the performance of the ceramic, we use the principle of cavity to establish the fourteen surfaces model of the SiC/ mullite porous ceramics, and use the ANSYS finite element simulation software to simulate the performance of ceramic, and do simulation on the mechanical properties of the ceramics. In order to study the influence of different wall thickness and curvature on the properties of ceramics, we calculate the structure stress distribution of fourteen su
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6

Liao, Rong, Chong Hai Wang, Jian Liu, Hong Sheng Wang, and Qi Hong Wei. "Porous Nitride Ceramic Composites with Low-Dielectric Properties." Key Engineering Materials 512-515 (June 2012): 849–53. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.849.

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The influences of the mullite hollow balls content on selected properties of Si3N4-BN matrix ceramics were investigated.The experiment showed that the apparent densities and the porosity of the nitride ceramic composites decreased as the mullite hollow balls contents increased.The strength of the porous nitride ceramic composite was greatly improved, and the dielectric constant decreased with a small addition of the mullite hollow balls. SEM micrographs showed that the mullite hollow balls became one flesh with the nitride ceramic composites.Many large pores appeared in the whole materials. Th
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7

Xu, Na Na, Shu Jing Li, Yuan Bing Li, Lin Yuan, Jin Long Zhang, and Lei Wang. "Effects of Sintering Temperature and Porogen Addition on Properties of Low Cost Porous Mullite Ceramics." Key Engineering Materials 655 (July 2015): 114–17. http://dx.doi.org/10.4028/www.scientific.net/kem.655.114.

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In the present paper, low cost porous mullite ceramics with high porosity, high strength and low thermal conductivity were fabricated using ceramic waste powder and clay as raw materials, and sawdust as porogen. The correlation of phase composition and physicochemical properties of such porous mullite ceramics were researched by varying sintering temperature and the extra addition of sawdust. The results show that: The ceramics show the best comprehensive properties when the sintering temperature is 1400 oC and the addition of sawdust is 30wt%. The results of SEM and EDS analysis confirm that
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8

Yang, Hong-Liang, Zi-Shen Li, You-Dong Ding, Qi-Qi Ge, Yu-Juan Shi, and Lan Jiang. "Effect of Silicon Source (Fly Ash, Silica Dust, Gangue) on the Preparation of Porous Mullite Ceramics from Aluminum Dross." Materials 15, no. 20 (2022): 7212. http://dx.doi.org/10.3390/ma15207212.

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Aluminum dross (AD) is a waste product produced during aluminum processing and can be used to prepare mullite ceramic materials. However, the research on the preparation of mullite porous ceramics entirely from solid waste is still in the development stage. In this paper, porous mullite ceramics were successfully fabricated using a solid-phase sintering process with AD and different silicon sources (fly ash, silica dust, and gangue) as raw materials. The bulk density, apparent porosity, and compressive strength of the specimens were obtained, and the phase compositions and microstructures of t
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9

Zhang, Hongyao. "Preparation of Porous Ceramic Building Decoration Materials by Foaming Method and Research on Nanomechanical Properties." International Journal of Analytical Chemistry 2022 (May 14, 2022): 1–7. http://dx.doi.org/10.1155/2022/8339503.

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Because of its excellent properties, mullite porous ceramics are widely used in thermal insulation materials, catalyst carriers, gas-liquid filtration, separation materials, etc. At the same time, zirconia not only has the advantages of high melting point, good chemical stability, and high strength but also can significantly improve the strength of ceramics through phase transformation and particle dispersion in the matrix and is widely used in the reinforcement of ceramics. In this paper, using mullite powder as the raw material, Al2O3 and SiO2/ZrSiO4 as the starting material for the mullite
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10

Sedmale, Gaida M., I. Sperberga, A. Hmelov, U. Sedmalis, and A. Actins. "Phase Formation and Structure of Mullite-Alumina-Zirconia and Spinel-Enstatite Ceramics Developed from Synthetic and Mineral Raw Materials." Materials Science Forum 575-578 (April 2008): 953–58. http://dx.doi.org/10.4028/www.scientific.net/msf.575-578.953.

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New dense and porous ceramics are developed using two formulation approaches. These are ceramics with remarkable content of mullite, corundum and ZrO2 - tetragonal and monoclinic in crystalline phase and porous (average size of pores up to 150-350μm) spinel-enstatite/forsterite ceramics. To promote the phase development by high-temperature synthesis of these ceramics the mineral raw materials – illite clay and illite clay together with dolomite are used. Bulk density for mullite (corundum) – zirconia ceramics is increased by equal addition of illite clay (8.2 wt.%) as well as ZrO2 and especial
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11

Zhou, Jian Er, Xiao Zhen Zhang, Jing Zhang, Yong Qing Wang, Shi Kai Zhao, and Xi E. Cai. "Influence of Clay Materials on Acicular Mullite Porous Ceramic." Advanced Materials Research 412 (November 2011): 344–47. http://dx.doi.org/10.4028/www.scientific.net/amr.412.344.

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Porous acicular mullite ceramic was prepared by in-situ reaction sintering, using clay materials and Al (OH)3) as the raw materials. The influences of different clay materials on the phase composition, formation of acicular grains and microstructure of prepared porous ceramics were investigated. Results show that the metal oxide impurities were beneficial for the synthesis of acicular mullite. The prepared porous ceramic from Longyan kaolin with high impurity content has the highest mullite content of 93.5%, and composed of interlaced acicular grains with high slenderness ratio of 26.4 and lar
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12

Mahnicka-Goremikina, Ludmila, Ruta Svinka, Visvaldis Svinka, et al. "Thermal Properties of Porous Mullite Ceramics Modified with Microsized ZrO2 and WO3." Materials 15, no. 22 (2022): 7935. http://dx.doi.org/10.3390/ma15227935.

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Mullite ceramics are well known as materials with a high temperature stability, strength and creep resistance. In this research, the effect of a modification with magnesia-stabilized zirconia and yttria-stabilized zirconia, separately, as well as in a mixture with WO3, in 1:1 and 1:2 ratios on the thermal properties of porous mullite ceramics was investigated. The porous mullite-containing ceramics were prepared by a slip casting of the concentrated slurry of raw materials with the addition of a suspension of Al paste for the pore formation due to the H2 evolution as a result of the reaction o
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13

Gong, Lun Lun, Yong Hong Wang, Xu Dong Cheng, Rui Fang Zhang, and He Ping Zhang. "Preparation of Porous Mullite Ceramics with Low Thermal Conductivity." Advanced Materials Research 813 (September 2013): 502–5. http://dx.doi.org/10.4028/www.scientific.net/amr.813.502.

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Porous mullite ceramics were prepared using an industrial grade mullite powder by foaming and starch consolidation method. The influence of solid loading of suspension and sintering temperature on the porosity of samples was evaluated. The sintered mullite ceramic with porosity from 73 to 86 vol% contained the microstructure with spherical pores and a larger mean pore size. Thermal conductivity measurements were carried out by the hot-disk technique at room temperature resulted in values as low as 0.09 W/(m·K).
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14

Hua, Kaihui, Xiaobing Chen, Anze Shui, et al. "Preparation and Properties of High Sound-Absorbing Porous Ceramics Reinforced by In Situ Mullite Whisker from Construction Waste." Molecules 29, no. 14 (2024): 3419. http://dx.doi.org/10.3390/molecules29143419.

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Porous sound absorption ceramic is one of the most promising materials for effectively eliminating noise pollution. However, its high production cost and low mechanical strength limit its practical applications. In this work, low-cost and in situ mullite whisker-reinforced porous sound-absorbing ceramics were prepared using recyclable construction waste and Al2O3 powder as the main raw materials, and AlF3 and CeO2 as the additives, respectively. The effects of CeO2 content, AlF3 content, and sintering temperature on the microstructure and properties of the porous ceramics were systematically i
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15

Wang, Yuxi, Shaofeng Zhu, Xianzhi Zhou, and Tong Zhang. "Effect Of Sintering Process On Micro-structure And Properties Of Mullite Porous Ceramics Containing magnesium oxide." Journal of Physics: Conference Series 2206, no. 1 (2022): 012037. http://dx.doi.org/10.1088/1742-6596/2206/1/012037.

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Abstract Mullite porous ceramics with high porosity and good mechanical properties were prepared by foaming method combined with gel casting process using kaolin and alumina as main raw materials and sodium polyoxyethylene ether sulfate as foaming agent. The effects of sintering process and magnesium oxide content on the microstructure and properties of mullite porous ceramics were investigated. The studies show that: With the addition of magnesium oxide, the amount of mullite produced and the compactness of the sample will increase. At this time, the microscopic morphology of mullite is needl
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16

Luo, Ming Hua, Jian Er Zhou, Yong Qing Wang, De Lin Wang, and Sheng Long Wang. "Preparation and Characterization of Porous Acicular Mullite Ceramics." Advanced Materials Research 412 (November 2011): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.412.65.

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Acicular mullite porous ceramics were synthesis by high-temperature sintering technique. In the present work, Kaolin and industrial aluminum hydroxide were selected as raw materials, AlF3 used as catalyst. XRD and SEM were used to detect the crystal type and microstructure of prepared mullite ceramics, respectively. The influences of sintering temperature on the growth of crystal, the apparent porosity and compressive strength of the resulting porous ceramics were investigated. The results indicate when sintering temperature ranges from 1250 ~ 1400°C, much acicular mullite crystal appeared in
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17

Liu, Zhenli, Xinhua Yan, Lei Yuan, and Jingkun Yu. "Study on the Effect of Binders on the Properties of Mullite Porous Ceramics for Flue Gas Filtration." E3S Web of Conferences 406 (2023): 01029. http://dx.doi.org/10.1051/e3sconf/202340601029.

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Fused mullite particles are used to prepare mullite porous ceramics by gel-casting method, using polysilicon waste and ρ-Al2O3 powder as the binder, and starch as the pore forming agent. The content of the pore forming agent was 20%, and the ratio of the mass of fused mullite particles to the mass of the binder was 9:1, 8:2, 7:3, and 6:4, respectively. The effects of binder content on the properties of mullite ceramics in terms of phase composition, microstructure, apparent porosity, compressive strength, bulk density, pore size distribution, and filtration pressure drop were investigated. It
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18

Ryschenko, M. I., O. Yu Fedorenko, M. Yu Lisytkina, O. V. Shevtsov, K. V. Bіlohubkina, and N. M. Reheda. "Regularities of phase formation, structure and properties of chemically and thermally resistant ceramic materials." Scientific research on refractories and technical ceramics 118 (July 11, 2018): 119–31. http://dx.doi.org/10.35857/2663-3566.118.11.

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Based on the compositions of MgO—Al2O3—TiO2—SiO2 system, the chemically and thermally resistant ceramic was obtained at a firing temperature of 1250 °C by the directed synthesis of tialite and mullite phases. The influence of alternative raw materials of natural and technogenic origin on the operational properties and phase composition of porous and densely-sintered ceramic materials was studied. The using expediency of pyrophyllite containing waste of quartzite mining and ferrotitanium production wastes as the phase forming components of ceramic masses is established. The mechanism of structu
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19

Park, Seong Hwan, Jae Won Kim, Yeon Gil Jung, Je Hyun Lee, Ung Yu Paik, and Hee Soo Lee. "Fabrication and Structure of TiO2 Coated Open-Cell Mullite Ceramics." Key Engineering Materials 317-318 (August 2006): 139–42. http://dx.doi.org/10.4028/www.scientific.net/kem.317-318.139.

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TiO2 coated open-cell mullite ceramics were fabricated with coating TiO2 sol on pores of mullite, and its processing parameters were investigated. Open-cell mullite ceramics were fabricated through a gel-casting process. Two kinds of mullite precursor powders were prepared by dissolution of two kinds of aluminum salts (Al(NO3)3·9H2O; type I and Al2(SO4)3·16H2O; type II) into colloidal silica sols. To produce porous mullite ceramics, both mullite precursor powders and PMMA beads (≈ 5μm) were co-dispersed by electrosteric stabilized mechanism in an aqueous system and then gel-casted. The green b
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20

Chen, Qingjie, Wen Yan, Nan Li, et al. "Effect of Al(OH)3 content on the microstructure and strength of porous cordierite-mullite ceramics prepared by an in-situ pore forming technique." Science of Sintering 50, no. 2 (2018): 205–15. http://dx.doi.org/10.2298/sos1802205c.

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Five porous cordierite-mullite ceramics with similar porosity and different neck characteristics were prepared from Al(OH)3, magnesite, silica and clay using an in-situ pore-forming technique. The phase composition, pore and neck characteristics and strength of the porous ceramics were investigated by an X-ray diffractometer (XRD), a scanning electron microscopy (SEM) and a microscopy measured method, etc. The experimental results showed that Al(OH)3 content had a significant effect on the pore size distribution and neck characteristics (neck size distribution, total value of neck size and pha
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21

Zhao, Ying Na, Cai Fen Wang, Jia Chen Liu, and Hai Xu. "Preparation of Porous Lightweight Ceramics and Fibre Joining Materials." Advanced Materials Research 415-417 (December 2011): 1038–41. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.1038.

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The high-temperature resistance compression material of lightweight porous ceramics and fiber joining is becoming a kind of promising seal parts in high-temperature industries and aerospace field. A combination of the lightweight mullite matrix porous ceramics and the elastic 3-D silica woven fibre, a novel joining material was studied. The low cost fly ash cenosphere as raw materials, mullite porous ceramics with density 0.92 g/cm3, and the thermal conductivity 0.13 w/m.K, were prepared. Using microwave selective heating properties, designing the interlayer composition, the bonding materials
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22

Yang, Feng Kun, Cui Wei Li, Ya Mei Lin, and Chan Gan Wang. "Fabrication of Porous Mullite Ceramics with High Porosity Using Foam-Gelcasting." Key Engineering Materials 512-515 (June 2012): 580–85. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.580.

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In this paper, porous mullite ceramics with an apparent porosity up to 81 % were fabricated by foam-gelcasting using mullite powder as raw material with solid loading of 40 vol.%. The monomers content and sitering temperature have obvious effect on the properties of porous mullite ceramics. The apparent porosity of the prepared samples was in the range of 75~82%, compressive strength, was in the range of 3.0~16.02 MPa, and thermal conductivity was between 0.14 and 0.47 W/(m•K). A complex porous microstructure was formed, where large spherical pores contained small cellular pores on their inter
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23

Mahnicka-Goremikina, Ludmila, Ruta Svinka, and Visvaldis Svinka. "Influence of Metal Oxides Additives on the Porous Mullite Ceramics." Key Engineering Materials 604 (March 2014): 293–96. http://dx.doi.org/10.4028/www.scientific.net/kem.604.293.

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The porous mullite ceramics doped with such metal oxides as ZrO2, WO3 and MgO in quantity of 5 wt% were prepared by slip casting method. The mullite phase was the main and dominant phase of ZrO2-, WO3- and MgO-doped samples, which were sintered at the temperatures of 1650°C, 1500°C, respectively. The ZrO2, WO3 and MgO had the positive effect on the increase of porosity and decrease of thermal conductivity of porous mullite ceramics and the degree of this effect was in the order of ZrO2<MgO<WO3.
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24

Ma, Qing Song, Hai Jun Peng, Li Qun Duan, and Zhao Hui Chen. "Effect of Pore-Forming Agent on Porous Mullite Ceramics from Pyrolysis of Alumina Powders Filled Silicone Resin." Key Engineering Materials 602-603 (March 2014): 208–11. http://dx.doi.org/10.4028/www.scientific.net/kem.602-603.208.

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Mesoporous and macroporous mullite ceramics were fabricated from pyrolysis of alumina nanopowders filled silicone resin. The effect of pore-forming agent (carbon nanopowders) on the pore structure and mechanical property of the porous mullite ceramics were investigated. By varying the carbon content, the porosity and flexural strength of the obtained ceramics could be easily tuned. Both of the open porosity and average pore size of the obtained samples increased at elevated carbon content, and reached the maximum value of 61.0%, 225.5 nm respectively when the carbon content got the highest poi
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25

Barry, Kassoum, Gisèle Laure Lecomte-Nana, Mohamed Seynou, Michael Faucher, Philippe Blanchart, and Claire Peyratout. "Comparative Properties of Porous Phyllosilicate-Based Ceramics Shaped by Freeze-Tape Casting." Ceramics 5, no. 1 (2022): 75–96. http://dx.doi.org/10.3390/ceramics5010007.

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Porous phyllosilicate-based ceramics were manufactured by freeze-tape casting from clays of different particle size and morphology in order to characterize their microstructure and stress to rupture changes before and after firing. Three raw clays were selected: HCR (77% Halloysite–10Å), KORS (29% kaolinite), and KCR kaolin (98% kaolinite). These clays exhibited a monomodal distribution and were used to prepare four slurries, three with each clay material and one consisting of a mixture of KCR and HCR labeled KHCR. After shaping by freeze-tape casting, the porosity and stress to rupture obtain
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Kim, Geun Hee, Jae Hwan Pee, Jin Ho Kim, Woo Seok Cho, Hyung Tae Kim, and Kyung Ja Kim. "Strength Improvement of Porous Ceramics by the Surface Infiltration of Strengthening Materials." Key Engineering Materials 608 (April 2014): 26–30. http://dx.doi.org/10.4028/www.scientific.net/kem.608.26.

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One method of improving the strength of porous ceramics is to add Al2O3 in ceramic raw materials and then they must be sintered at high temperature for densification. However, the non-plastic property of Al2O3 leads to a decline in plasticity of clay body, thus severely interfering with forming process. Besides porous ceramics have fine cracks and pores distributed within porous ceramics, these fine cracks on the surface also result in weakening of the sintered body. In this study, we attempted to improve the strength while compensating for the weakness of porous ceramics by the surface infilt
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27

Das, Dulal, and Nijhuma Kayal. "The Effect of Bond Phase Additive and Sintering Temperature on the Properties of Mullite Bonded Porous SiC Ceramics." Materials Science Forum 978 (February 2020): 454–62. http://dx.doi.org/10.4028/www.scientific.net/msf.978.454.

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Currently, porous SiC ceramics have been a focus of interesting research in the field of porous materials due to their excellent structural properties, high strength, high hardness, and superb mechanical and chemical stabilities even at high temperatures and hostile atmospheres. Porous SiC ceramics have been considered as suitable candidate materials for catalyst supports [1-2], hot gas or molten metal filters [3], high temperature membrane reactors [4], thermal insulating materials [5], gas sensors [6] etc. Porous SiC ceramics are fabricated by various methods including partial sintering [7],
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28

Švinka, Visvaldis, and Ruta Švinka. "Augsti poraina oksīdu keramika." Materials Science and Applied Chemistry 35 (November 1, 2018): 86–111. http://dx.doi.org/10.7250/msac-2018-0004.

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Silikātu materiālu institūtā kopš 2004. g. tiek veikti pētījumi par augsttemperatūras augsti porainu oksīdu keramiku, kas iegūta ar koncentrētas oksīdu pulveru suspensijas liešanas paņēmienu. Poru veidošanās notiek ķīmiskas reakcijas ceļā starp metāliska alumīnija pulveri un ūdeni bāziskā vidē, kur suspensijas pH ir 9,5–10,8. Tādā veidā netiek emitēts CO2, kas parasti notiek, iegūstot keramikas materiālus ar paaugstinātu porainību.Laikā kopš 2007. g. sintezēti materiāli un veikti pētījumi vairākās augsttemperatūras oksīdu sistēmās: cirkonija oksīdu saturošā (promocijas darbs, G. Buļa, Cirkonij
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29

She, Ji Hong, Jian Feng Yang, and Tatsuki Ohji. "Reaction Bonding of Porous Mullite Ceramics." Key Engineering Materials 247 (August 2003): 223–26. http://dx.doi.org/10.4028/www.scientific.net/kem.247.223.

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30

Abe, H., H. Seki, A. Fukunaga, and M. Egashira. "Preparation of bimodal porous mullite ceramics." Journal of Materials Science 29, no. 5 (1994): 1222–26. http://dx.doi.org/10.1007/bf00975068.

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31

Miao, X. "Porous mullite ceramics from natural topaz." Materials Letters 38, no. 3 (1999): 167–72. http://dx.doi.org/10.1016/s0167-577x(98)00153-0.

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32

Kalemtaş, Ayşe, Nigar Özey, and Meryem Türkay Aytekin Aydin. "Processing of layered porous mullite ceramics." Journal of the Australian Ceramic Society 54, no. 3 (2018): 545–55. http://dx.doi.org/10.1007/s41779-018-0183-6.

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33

Guo, Wei, Hong Bin Lu, Chun Xia Feng, et al. "Low-Temperature Preparation of Porous Cordierite-Mullite Ceramics Using Rice Husk as Silica Source and Pore-Forming Agent." Applied Mechanics and Materials 217-219 (November 2012): 86–90. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.86.

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Si and C of rice rusk were used as silica source and pore-forming agent to prepare cordierite-mullite ceramics at 1380°C for 5 h soaking. The Nd2O3 additive was added to improve the sintering properties. The bending strength, porosity, and thermal expansion coefficient were measured. The composition was characterized by X-ray diffraction (XRD). The microstructures of the sintered samples were observed by scanning electron microscopy (SEM). The cordierite-mullite ceramic doped with 2% Nd2O3 have high prorosity and low thermal expansion coefficient, its bending strength reaches 20.55 MPa. The ad
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34

Pottmaier, Daphiny, Jefferson J. Rosario, Marcio C. Fredel, Amir A. M. Oliveira, and Orestes E. Alarcon. "Mullite Formation in Al2O3/SiO2/SiC Composites for Processing Porous Radiant Burners." MRS Proceedings 1492 (2013): 169–75. http://dx.doi.org/10.1557/opl.2013.320.

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ABSTRACTUse of porous ceramic burners for natural gas combustion is an optimum alternative to enhance energy efficiency and decrease emission of pollutant gases per generated power. Materials requirements for the operation of such porous burners are mainly thermal shock and chemical resistance and those can be reached with cellular ceramics. Mullite was theoretically identified among the best materials for this application; however, its potential was not properly explored yet. Even though mullite can be synthesized from different compounds and processing routes, control of final material chara
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Yan, W., N. Li, J. Tong, G. Liu, and J. Xu. "Effect of particle size on the pore characterization and strength of porous cordierite-mullite ceramics prepared by a pore-forming in-situ technique." Science of Sintering 45, no. 2 (2013): 165–72. http://dx.doi.org/10.2298/sos1302165y.

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The porous cordierite-mullite ceramics were prepared by the pore-forming in-situ technique. The characterizations of porous cordierite-mullite ceramics were determined by an X-ray diffractometer (XRD), a scanning electron microscopy (SEM), and a microscopy measured method, etc., and the effect of particle size on phase composition, pore characterization and strength were investigated. It?s found that particle size affects strongly the formations of cordierite and mullite, and then changes the pore characterization and strength. With the decrease of the particle size, the sintering temperature
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36

Jia, Qi Hui, Jia Chen Liu, Ji Ping Guo, Xiong Wei Du, Zhong Jie Wang, and Wen Jun Wang. "Preparation of Porous Mullite Ceramics by Fly Ash/Al Compositions." Key Engineering Materials 434-435 (March 2010): 81–84. http://dx.doi.org/10.4028/www.scientific.net/kem.434-435.81.

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Porous mullite was prepared from a reactive mixture of Al metal powder and the fly ash produced by power plant. The sintering ceramics was characterized for the pore structure and phase identification studies. It was found that the sintered specimen expands at first (1300-1400°C) and then shrinks which was correspondence to the changing of open porosity. The expansion was attributed to the fact that the alumina produced from the oxidation reaction of Al powder made the volume larger than the starting mixtures. At 1550°C, it was inferred that the alkaline element in the fly ash made the mullite
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37

Yin, Jia Zhi, Jia Chen Liu, An Ran Guo, Di Song, and Wen Jun Wang. "Preparation of Porous Mullite Ceramics Using Al as Foaming Agent." Key Engineering Materials 434-435 (March 2010): 682–83. http://dx.doi.org/10.4028/www.scientific.net/kem.434-435.682.

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Effects of Al in different added condition on pores shape and mullite configuration were investigated. Three sorts of hole were got by using Al as foaming agent in mullite composites. It was concluded that isolated holes could be formed by Al changing to Al2Ol3 with acidity condition in green state, open holes could be formed by Al changing to Al2O3 directly in sintering process, and mixed hole of isolated and open ones could be formed by Al changing to Al(OH)3 with alkalescence condition in green state followed changing to Al2O3 in sintering process. These holes could supply a position for gr
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38

Garcia, E., M. I. Osendi, and P. Miranzo. "Porous mullite templated from hard mullite beads." Journal of the European Ceramic Society 31, no. 8 (2011): 1397–403. http://dx.doi.org/10.1016/j.jeurceramsoc.2011.02.004.

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39

Hua, Yao Ai, Ke Yang, and Ruo Ding Wang. "Fabrication of Tubular Mullite-Alumina Porous Ceramics by Polymer-Aided Extrusion." Materials Science Forum 486-487 (June 2005): 333–37. http://dx.doi.org/10.4028/www.scientific.net/msf.486-487.333.

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Mullite-alumina porous ceramics were fabricated by polymer-aided extrusion through using natural kaolin and alumina as starting materials. The physical and chemical properties of porous ceramics were investigated. The results showed that the approach of using kaolin as starting material offers many benefits such as low cost, big processing capacities, low mullitization temperature and unique microstructure. The porous ceramics with high strength, high porosity, narrow pore size distribution, high permeability and good thermal-shock behavior was obtained by modifying preparation conditions.
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40

Dai, Xinchao, RiDong Xue, Shuang Qiu, and Xiangyun Deng. "Effect of Binder Content on Properties of Cordierite-Mullite Porous Ceramics." Journal of Physics: Conference Series 2706, no. 1 (2024): 012005. http://dx.doi.org/10.1088/1742-6596/2706/1/012005.

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Abstract In this paper, 70-80 mesh SiC particles were used as the base, and 2.5%MgO was added on the basis of quartz, kaolin and potassium feldspar as the binder. Meanwhile, graphite and activated carbon were added as pore-making agents for SiC porous ceramic supports. At the same time, the amount of binder added was changed under the condition of keeping SiC: pore-making agent 8:1 unchanged. The effects of binder content on flexural strength, filtration pressure drop and porosity of porous SiC ceramics were investigated. The results indicated that the comprehensive properties of SiC porous ce
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41

Shushkov, D. A., I. N. Burtsev, and Yu S. Simakova. "DENSE AND POROUS CERAMIC MATERIALS FROM COAL SLUDGE OF THE INTA DEPOSIT." Steklo i Keramika, no. 4 (April 2022): 29–38. http://dx.doi.org/10.14489/glc.2022.04.pp.029-038.

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Dense and porous thermal-insulating ceramic materials were obtained from the flotation tailings of coal sludge of the processing plant of Inta town. The thermal behavior, changes in the phase and chemical composition during firing in the temperature range from 800 to 1280 °C were studied. During firing, carbonates dissociated, magnetite oxidized, kaolinite amorphized, layers in layered silicates compressed, at 1100 °C cristobalite and spinel were formed, at 1150 °C – mullite, the content of the amorphous phase increased. Dense ceramic materials were obtained at firing temperatures of 800 – 115
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42

Qiu, Shuang, RiDong Xue, Xinchao Dai, Chengjun Wu, and Xiangyun Deng. "Effect of La2O3 adding on Properties of SiC Porous Ceramic Support." Journal of Physics: Conference Series 2706, no. 1 (2024): 012034. http://dx.doi.org/10.1088/1742-6596/2706/1/012034.

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Abstract In this paper, 80-90 grains of SiC as the main raw material, doped La2O3 into the binder composed of potassium feldspar, kaolinite and quartz, and then graphite and activated carbon as pore-making agents to prepare silicon carbide porous ceramic carrier. The effects of doped La2O3 content on the bending strength, porosity and filtration pressure drop of porous SiC ceramics were studied. The results show that the formation of mullite phase and the bending strength of SiC porous ceramics can be improved by adding proper amount of La2O3. Under the sintering temperature of 1300°C for 90 m
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43

Valášková, Marta, Veronika Blahůšková, and Jozef Vlček. "Effects of Kaolin Additives in Fly Ash on Sintering and Properties of Mullite Ceramics." Minerals 11, no. 8 (2021): 887. http://dx.doi.org/10.3390/min11080887.

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The effective utilization of fly ash (FA) as a raw material for ceramics production is performed on the FA-kaolin mixtures containing kaolins 10% by mass. The mixtures in comparison with FA and three raw kaolins were annealed to mullite ceramics at temperatures of 1000, 1100, 1200 and 1300 °C. The main aims were to contribute to the discussion on the effect of impurity of Na,K-feldspars in kaolins and Fe2O3 in FA on sintering procedure, porous ceramics properties and mullite structural properties. The phases were characterized using X-ray diffraction and thermogravimetry DTA/TGA methods. Mercu
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44

Goodridge, Ruth D., Chikara Ohtsuki, Masanobu Kamitakahara, David J. Wood, and Kenny W. Dalgarno. "Fabrication of Bioactive Glass-Ceramics by Selective Laser Sintering." Key Engineering Materials 309-311 (May 2006): 289–92. http://dx.doi.org/10.4028/www.scientific.net/kem.309-311.289.

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The feasibility of processing glass-ceramics using the layer manufacturing technique, selective laser sintering (SLS), to produce parts with suitable biological and mechanical properties for use in bone replacement applications, has been investigated. Glass-ceramics derived from glasses based on several different systems have been considered. Initial experiments using an apatite-mullite glass-ceramic (4.5SiO2⋅3Al203⋅1.6P2O5⋅3CaO⋅2CaF2) demonstrated the ability to process glass-ceramic materials using this technique, creating parts with a strength similar to that of cancellous bone, and a porou
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45

Bai, Cheng Ying, Zhang Min Liu, Ya Ni Jing, et al. "Effect of Al(OH)3 Addition on the Properties of SiC/Al2O3 Composite Porous Ceramics." Advanced Materials Research 821-822 (September 2013): 1208–12. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.1208.

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SiC/Al2O3composite porous ceramics were prepared by an in situ reaction bonding technique and sintering in air with SiC and A1(OH)3as starting materials. The pores in the ceramics were formed by stacking particles of SiC and A12O3. The surface of SiC was oxidized to SiO2at high temperature. With further increasing the temperature, SiO2reacted with A12O3to form mullite. The reaction bonding characteristics, phase composition, and mechanical strength as well as microstructure of porous SiC ceramics were investigated.
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46

Rouabhia, F., A. Nemamcha, and H. Moumeni. "Elaboration and characterization of mullite-anorthite-albite porous ceramics prepared from Algerian kaolin." Cerâmica 64, no. 369 (2018): 126–32. http://dx.doi.org/10.1590/0366-69132018643692297.

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Abstract Mullite-anorthite-albite porous ceramic materials were successfully prepared by a solid-state reaction between kaolin clay and two different additives (CaCO3 and Na2CO3). The starting raw material was characterized by X-ray fluorescence, X-ray diffraction (XRD) and dynamic light scattering techniques. The effect of CaCO3 and Na2CO3 concentration (10 to 70 wt%) on structure, morphology and thermal properties of the obtained ceramics was investigated by XRD, scanning electron microscopy and differential scanning calorimetry (DSC) techniques. The XRD patterns showed that mullite (3Al2O3.
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47

Mahnicka-Goremikina, Ludmila, Maris Rundans, Vadims Goremikins, et al. "Effect of Microsize and Nanosize TiO2 on Porous Mullite-Alumina Ceramic Prepared by Slip Casting." Materials 17, no. 24 (2024): 6171. https://doi.org/10.3390/ma17246171.

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Sintered porous mullite-alumina ceramics are obtained from the concentrated suspension of powdered raw materials such as kaolin, gamma and alpha Al2O3, and amorphous SiO2, mainly by a solid-state reaction with the presence of a liquid phase. The modification of mullite ceramic is achieved by the use of micro- and nanosize TiO2 powders. The phase compositions were measured using an X-ray powder diffraction (XRD) Rigaku Ultima+ (Tokyo, Japan) and microstructures of the sintered specimens were analysed using scanning electron microscopy (SEM) Hitachi TM3000-TableTop (Tokyo, Japan). The shrinkage,
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48

Latella, Bruno A., and Edward G. Mehrtens. "High temperature biaxial strength of porous mullite-alumina and mullite-zirconia ceramics." Journal of Materials Science 42, no. 14 (2007): 5880–82. http://dx.doi.org/10.1007/s10853-007-1844-y.

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49

ABE, Hisao, Hideya SEKI, Akio FUKUNAGA, and Makoto EGASHIRA. "Preparation of Porous Mullite Ceramics by Leaching Method." Journal of the Ceramic Society of Japan 97, no. 1126 (1989): 604–11. http://dx.doi.org/10.2109/jcersj.97.604.

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50

Zhang, Ying, Yongjun Wu, Xukun Yang, et al. "High-strength thermal insulating mullite nanofibrous porous ceramics." Journal of the European Ceramic Society 40, no. 5 (2020): 2090–96. http://dx.doi.org/10.1016/j.jeurceramsoc.2020.01.011.

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