Results 61 to 70 of about 19,814 (230)

Ceramic Production and Geodiversity in Iron Age Iberia: An Archaeometric Study of Pottery from Castrejón de Capote (SW Spain)

open access: yesArchaeometry, EarlyView.
ABSTRACT The hillfort of Castrejón de Capote is one of the best investigated settlements of Late Iron Age southwest Iberia. Located in the territory that the classical sources attributed to the Celtici, it was occupied between the early 4th and the 1st centuries bce.
Beatrijs de Groot   +2 more
wiley   +1 more source

Solid-state NMR characterisation of the thermal transformation of a Hungarian white illite [PDF]

open access: yes, 2005
1H, 27Al, 29Si and 39K solid-state NMR are reported from a Hungarian illite 2:1 clay for samples heated up 1600 °C. This single-phase sample has a small amount of aluminium substitution in the silica layer and very low iron-content (0.4 wt%).
Ban   +56 more
core   +1 more source

The Material Basis of 18th‐Century Meissen Porcelain

open access: yesArchaeometry, EarlyView.
ABSTRACT In the summer of 1708, the quest for making hard‐paste porcelain from Saxonian clay and other mineral resources succeeded. This was achieved by applying as its essential ingredient newly discovered pure kaolin from Heidelsberg near Aue, western Saxon Ore Mountains.
Robert B. Heimann
wiley   +1 more source

Toughening effect of mullite whisker within low-density ceramic proppants

open access: yesAdvanced Composites Letters, 2019
Main crystal phases of low-density ceramic proppants prepared by bauxite and feldspar are granular corundum and whisker-shaped mullite. Mullite whiskers are interlocked with one another and piled up inside the pores. High aspect ratio of mullite whiskers
Jianying Hao   +5 more
doaj   +1 more source

Synthesis of Mullite Powder from Aluminum Nitrate and Precipitated Silica using Sol-Gel Process [PDF]

open access: yesEngineering and Technology Journal, 2016
In this work, a new route for possibility synthesizing high purity submicron size mullite (3A12O3.2SiO2) powder at relatively low temperature. Mullite precursor has been prepared from mixing precipitated silica powder with solution of aluminum nitrate ...
Hussein Alaa Jaber
doaj   +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

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

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

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