Results 171 to 180 of about 9,594 (227)
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Mullite and mullite-type crystal structures
International Journal of Materials Research, 2012Abstract Synthetic mullites (Al4+2 x Si2 –2 x O10 – x ) belong to one of the most important groups of ceramic materials.
Reinhard X. Fischer +3 more
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Coprecipitation-derived mullite and mullite-zirconia composites
Journal of Materials Science, 1991Precursor powders of mullite-zirconia (0–40 wt% ZrO2) were prepared by a hydroxide coprecipitation method and their behaviour during calcination between room temperature and 1500 °C was studied using thermal analysis, X-ray diffraction and electron microscopy.
S. Rajendran, H. J. Rossell
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Interfacial Chemistry of Mullite-Mullite Composites
2008Interfacial chemistry of mullite fiber reinforced-mullite matrix composites was examined using SEM/EDX and scanning AES. All the fibers bond strongly to the matrix and exhibit no sliding during afiber push-in test. Excess Si over AI is found at the fiber-matrix interfaces. AES results show the carbon -layer is nonuniform and in some cases less than 30
Ori Yeheskel +2 more
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Journal of the European Ceramic Society, 1993
Abstract Admixtures of tetraethoxysilane (TEOS) and aluminium sec.-butylate (AlOBu) with stoichiometric 3Al2O3.2SiO2 mullite composition were used for the syntheses. Depending on the amount of H2O, the velocity of the hydrolysis process and the pH of the solvent, three different types of temperature-induced mullite formation processes are observed ...
Schneider, H. +4 more
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Abstract Admixtures of tetraethoxysilane (TEOS) and aluminium sec.-butylate (AlOBu) with stoichiometric 3Al2O3.2SiO2 mullite composition were used for the syntheses. Depending on the amount of H2O, the velocity of the hydrolysis process and the pH of the solvent, three different types of temperature-induced mullite formation processes are observed ...
Schneider, H. +4 more
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Crystallization studies in mullite and mullite–YSZ beads
Journal of the European Ceramic Society, 2010Abstract Mullite and mullite/Y-ZrO2 (25 and 50 vol.%) beads were produced by thermal spraying in water the corresponding atomised compositions. The amount of amorphous phases in the as-sprayed beads was comparatively determined by X-ray diffraction (XRD) and differential thermal analysis (DTA) methods.
E. Garcia +3 more
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Composite Interfaces, 1998
The possibility of fabricating continuous mullite/Mo FGMs with density closed to theoretical, by pressure slip casting of proof ethyl alcohol based slurries has been shown. Dense (> 98 th%) homogeneous mullite/Mo (32 vol%) composites with two Mo average grain sizes (1.5 and 3 μm) have been obtained at 1650°C in vacuum and under reducing conditions ...
J.S. Moya +3 more
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The possibility of fabricating continuous mullite/Mo FGMs with density closed to theoretical, by pressure slip casting of proof ethyl alcohol based slurries has been shown. Dense (> 98 th%) homogeneous mullite/Mo (32 vol%) composites with two Mo average grain sizes (1.5 and 3 μm) have been obtained at 1650°C in vacuum and under reducing conditions ...
J.S. Moya +3 more
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Nanocomposite Mullite/Mullite Powders by Spray Pyrolysis
Journal of Nanoparticle Research, 1999A mullite/mullite nanocomposite powder has been synthesized, composed of nanometer-size 3Al2O3 2SiO2 (‘3 : 2’) mullite precipitates within a matrix of the high alumina 2Al 2O3 SiO2 (‘2 : 1’) mullite. Historically, the transition from the metastable high-alumina phase to the thermodynamically stable ‘3 : 2’ phase of mullite has been thought to be a ...
Daniel M. Dabbs, Nan Yao, Ilhan A. Aksay
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Fine milling of fused mullite and mullite-corundum
Refractories, 1981Milling time during the fine grinding of fused mullite and mullite-corundum powders in a vibromill instead of a ballmill can be reduced by a factor of five. The addition of sulfite lye or ethyl silicate in amounts of 0.1% reduces by a factor of 12–18 the vibromilling time, but iron pickup is increased. Grinding in a jet mill causes the specific surface
V. A. Ustichenko, V. S. Shapovalov
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Porous mullite templated from hard mullite beads
Journal of the European Ceramic Society, 2011Abstract Porous mullite bodies were developed by spark plasma sintering (SPS) amorphous mullite beads of about ∼30 μm in diameter at two temperatures, 950 and 1300 °C. Materials showed a close random stacking of solid spheres that retained their original packing but slightly flattened at the contacts in some cases.
E. Garcia, M.I. Osendi, P. Miranzo
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Journal of the American Ceramic Society, 1948
A bstract The thermal behavior of kaolinite was studied by electron microscopy and X‐ray diffraction. This study has shown that hexagonal‐shaped particles persist far above the dehydration temperature of kaolinite.
J. E. Comeforo +2 more
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A bstract The thermal behavior of kaolinite was studied by electron microscopy and X‐ray diffraction. This study has shown that hexagonal‐shaped particles persist far above the dehydration temperature of kaolinite.
J. E. Comeforo +2 more
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