Results 31 to 40 of about 32,961 (360)

Sintering and mechanical properties of porcelains prepared from algerian raw materials Sinterização e propriedades mecânicas de porcelanas preparadas com matéria-prima argelina

open access: yesCerâmica, 2011
Porcelain is a type of ceramics highly valued for its beauty and strength. The overall goal of this work is to utilize local raw materials within the following fractions: 37 wt.% kaolin, 35 wt.% feldspar and 28 wt.% quartz.
S. Kitouni, A. Harabi
doaj   +1 more source

The Influence of Magnesia Addition and Sintering Temperature on The Properties of Synthesized Electrical Porcelain [PDF]

open access: yesEngineering and Technology Journal, 2015
The influence ofmagnesia (MgO) content at different sintering temperatures on the physical and dielectric properties of synthesized electrical porcelain was investigatied.Feldspar is one of the major components of porcelain,since feldspar is not ...
Fadhil A. Chyad   +3 more
doaj   +1 more source

K-feldspar sand-grain provenance in the Triassic, west of Shetland : distinguishing first-cycle and recycled sediment sources?

open access: yes, 2009
Sandstone provenance studies can help constrain palaeogeographic reconstructions and ancient drainage system scales and pathways. However, these insights can be obscured by difficulties in geochemically distinguishing or adequately characterising ...
Daly, J. Stephen   +9 more
core   +1 more source

EFFECT OF BIOCHAR ON K AND P RELEASE FROM K-FELDSPAR & ROCK PHOSPHATE AND ITS IMPACT ON SOME GROWTH PARAMETER OF MAIZE PLANT [PDF]

open access: yesArab Universities Journal of Agricultural Sciences, 2019
Pot experiments were carried out using sand (collected from Ismailia ARS), in the greenhouse to study the effect of biochar application, on K and P release from their natural bearing minerals i.e.,K- feldspar and rock phosphate and\or bentonite on some ...
Manal El mahdy   +3 more
doaj   +1 more source

Sedimentology, sandstone provenance and palaeodrainage on the eastern Rockall Basin margin : evidence from the Pb isotopic composition of detrital K-feldspar

open access: yes, 2010
The Rockall Basin, west of Ireland, is a frontier area for hydrocarbon exploration but currently the age and location of sand fairways through the basin are poorly known.
Daly, J. Stephen   +9 more
core   +1 more source

The incrementally zoned Miocene Ayagaures ignimbrite (Gran Canaria, Canary Islands) [PDF]

open access: yes, 2010
The 20–25 m thick trachyphonolitic Ayagaures ignimbrite cooling unit [(AY); 11.8 Ma] exposed over 250 km2 (onshore volume ca. 4.5 km3 DRE) is the uppermost and most voluminous cooling unit of the Middle Fataga Formation (MFF), part of the Fataga Group ...
Hans-Ulrich Schmincke   +5 more
core   +1 more source

Efeito da modificação da composição química na sinterização e microestrutura de porcelanas de ossos bovinos Effect of chemical composition modification on sinterability and microstructure of bone china

open access: yesCerâmica, 2010
Bone china é um tipo especial de porcelana que foi primeiramente desenvolvida no Reino Unido e é caracterizada pela alta resistência mecânica, grande alvura e translucidez.
D. Gouvêa, S. Hirakata, H. Kahn
doaj   +1 more source

Soil formation in high elevation and permafrost areas in the Qinghai Plateau (China) Edafogénesis en zonas elevadas y con permafrost en el Plateau Qunghai (China) Formação do solo em áreas de elevada altitude e em ambientes"permafrost" do planalto de Qinghai Plateau (China) [PDF]

open access: yesSpanish Journal of Soil Science, 2012
<p style="text-align: justify;">Soil systems continuously gain and lose matter and energy even in areas where climate is too harsh to support the higher plants such as in high elevations and in permafrost environments. The purpose of this
Joselito Arocena   +2 more
doaj   +1 more source

Anisotropy of magnetic susceptibility in alkali feldspar and plagioclase [PDF]

open access: yes, 2016
Feldspars are the most abundant rock-forming minerals in the Earth’s crust, but their magnetic properties have not been rigorously studied. This work focuses on the intrinsic magnetic anisotropy of 31 feldspar samples with various chemical compositions ...
Angel, R. J.   +3 more
core   +1 more source

Geochemistry of a spheroidal weathering profile in a tropical mountainous landscape, Rio de Janeiro, Brazil

open access: yesAnais da Academia Brasileira de Ciências, 2022
Boulders are an important material in debris flow and their source is coupled with spheroidal weathering profiles that produce corestones. The goal of this work was to establish the geochemical transformations that produced corestones and distinguished ...
CARLA S. SILVEIRA   +4 more
doaj   +1 more source

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