Results 71 to 80 of about 8,938 (232)

Mullite-2c – a natural polytype of mullite

open access: yes, 2020
A single crystal (∼ 20 µm × 20 µm × 330 µm) of mullite-2c, a natural polytype of mullite, was separated from a radially grown cluster of acicular crystals from Ettringer Bellerberg (Quarternary Eifel volcanic fields, Germany).
Lenz, Stephan   +4 more
openaire   +2 more sources

Effect of particle size on the pore characterization and strength of porous cordierite-mullite ceramics prepared by a pore-forming in-situ technique [PDF]

open access: yesScience of Sintering, 2013
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 ...
Yan W., Li N., Tong J., Liu G., Xu J.
doaj   +1 more source

The Effect of Demineralization on Coal Functional Group Pyrolysis: Rank‐Dependent Dual Mechanisms of Structural Reorganization and Mineral Catalysis

open access: yesAsia-Pacific Journal of Chemical Engineering, Volume 21, Issue 3, May/June 2026.
ABSTRACT Coal pyrolysis, as a key thermochemical conversion process, is significantly influenced by inherent minerals, yet their role across different coal ranks remains inadequately understood. This study investigates the effect of acid‐washing (demineralization) on the thermal decomposition of six functional groups (aliphatic C–H, aromatic C–H/C=C, C=
Zhiyuan Niu   +4 more
wiley   +1 more source

Unburned Carbon in Coal Fly Ash: Exploring Its Potential for Electrochemical Energy Storage in Supercapacitors

open access: yesAdvanced Energy and Sustainability Research, Volume 7, Issue 4, April 2026.
The graphical abstract illustrates a circular waste to value pathway in which coal fly ash is upgraded by isolating unburned carbon and converting it into functional carbon materials. Through carbonization and activation, UC‐derived carbon is transformed into high surface area electrodes for supercapacitors, supporting sustainable energy storage and ...
Thapelo Manyepedza, Moses T. Kabomo
wiley   +1 more source

Product Scope and Reactivity in Hydrothermal Conversion of Polyethylene With Solid Catalysts

open access: yesChemCatChem, Volume 18, Issue 7, 14 April 2026.
The addition of solid catalysts to the hydrothermal conversion of polyethylene increases the conversion and promotes the formation of naphtha‐like compounds when using CeO2, and aromatic compounds when using aluminosilicates. The reusability of these catalyst materials was demonstrated as they retained catalytic activity upon reuse.
Johan H. van de Minkelis   +5 more
wiley   +1 more source

Influence of Ethylene Glycol on the Mullite Crystallization Processes Analyzed by Rietveld Refinement

open access: yesJournal of Aerospace Technology and Management, 2013
http://dx.doi.org/10.5028/jatm.v5i4.273 Mullite is an excellent structural material due to its high temperature stability, high electrical insulation capabilities and creep resistance.
Flaviano Willians Fernandes   +5 more
doaj  

Processing–Property Mapping of Flash‐Sintered Wall Tile Bodies

open access: yesInternational Journal of Applied Ceramic Technology, Volume 23, Issue 2, April 2026.
ABSTRACT This study investigates the effects of furnace temperature (900°C and 945°C), applied electric field (50–200 V.cm−1), and current density (50–150 mA.mm−2) on the physical properties and microstructure of flash‐sintered wall tile bodies. Water absorption, bulk density, and open porosity were measured and compared with an industrially fired ...
Zeynep Çetinkaya   +4 more
wiley   +1 more source

A three-dimensional mullite-whisker network ceramic with ultra-light weight and high-strength prepared by the foam-gelcasting method

open access: yesJournal of Asian Ceramic Societies, 2020
A three-dimensional mullite-whiskers network ceramic with ultra-light weight and high-strength was obtained by the foaming gel-casting method with active mulllite powders and NH4F.
Mengmeng Yang   +5 more
doaj   +1 more source

Influência do Y2O3 na sinterização rápida de mulita comercial Influence of Y2O3 on rapid sintering of commercial mullite

open access: yesCerâmica, 2011
A mulita tem se tornado um material forte candidato para uso como cerâmica avançada e funcional. Nesse sentido, muito interesse tem sido devotado no estudo de aditivos de sinterização.
P. M. Souto   +2 more
doaj   +1 more source

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