Glazes for high-quartz electro technical porcelain

1976 ◽  
Vol 33 (8) ◽  
pp. 510-513
Author(s):  
B. I. Gaidash ◽  
G. F. Derevyagin ◽  
A. A. Derevyagina
Keyword(s):  
High Quartz ◽  
Technical Porcelain

The Processing of High Quartz Bauxite

2016 ◽  
pp. 217-221
Author(s):  
Edgar Gasafi ◽  
Alessio Scarsella ◽  
Vladimir Hartman ◽  
Hans. W. Schmidt
Keyword(s):  
High Quartz

The Processing of High Quartz Bauxite

2013 ◽  
pp. 217-221
Author(s):  
Edgar Gasafi ◽  
Alessio Scarsella ◽  
Vladimir Hartman ◽  
Hans. W. Schmidt
Keyword(s):  
High Quartz

Effect of nano-TiO2 content on the mechano-physical properties of electro-technical porcelain

2020 ◽  
Vol 254 ◽  
pp. 123469 ◽  
Author(s):  
D.A. Alonso-De la Garza ◽  
Edén A. Rodríguez ◽  
José E. Contreras ◽  
J.F. López-Perales ◽  
Leonel Díaz-Tato ◽  
...  
Keyword(s):  
Physical Properties ◽  
Tio2 Content ◽  
Nano Tio2 ◽  
Technical Porcelain

scholarly journals Mg‐bearing quartz solid solutions as structural intermediates between low and high quartz

2020 ◽  
Vol 104 (2) ◽  
pp. 1146-1155
Author(s):  
Alessio Zandona ◽  
Bernd Rüdinger ◽  
Joachim Deubener
Keyword(s):  
Solid Solutions ◽  
High Quartz

Some Effects of Artificial Heating on Fluorite-Bearing Albite-Granite from St. Austell, Cornwall

1957 ◽  
Vol 94 (1) ◽  
pp. 69-80 ◽  
Author(s):  
J. H. Weymouth ◽  
W. O. Williamson
Keyword(s):  
Thermal Expansion ◽  
Alkali Feldspar ◽  
Artificial Heating ◽  
Albite Granite ◽  
High Quartz

AbstractThe granite consisted chiefly of albite, quartz, muscovite, microperthite, fluorite, and topaz; zircon was very rare. The low to high quartz transition enhanced thermal expansion and porosity. Heating was continued step-wise to 1,300°C. and caused an irreversible increase in porosity at all temperatures investigated. The changes undergone by the various minerals, separately or through interaction, were noted. Fluorite began to melt against muscovite or alkali-feldspar between 800° and 900°C. Muscovite developed brownish pleochroism at the lower, and was replaced by mullite at the higher, temperatures. The gradual melting of feldspar, the development of cleavages and cracks in quartz, and the invasion of these cracks by feldspathic glass resembled phenomena in certain xenoliths.The conditions that produced glass when powdered granite was heated unconfined or in a bomb are described.

scholarly journals Provenance and diagenesis from two stratigraphic sections of the lower cretaceous Caballos formation in the upper Magdalena valley: Geological and reservoir quality implications

2018 ◽  
Vol 8 (1) ◽  
pp. 5-29 ◽  
Author(s):  
Edison Duarte
Keyword(s):  
Detrital Zircons ◽  
Source Areas ◽  
Rock Fragments ◽  
Lower Member ◽  
Eastern Segment ◽  
Porosity And Permeability ◽  
Jurassic Rocks ◽  
Late Diagenesis ◽  
Central Cordillera ◽  
High Quartz

The Aptian-Albian Caballos Formation is a proven reservoir in the oil producing basins of the Upper Magdalena Valley and Putumayo (Colombia), characterized by wide variation in its petrophysical properties. Integrated provenance, diagenetic and basic petrophysical analyses are presented from two stratigraphic sections of the Caballos Formation in the Upper Magdalena Valley (Ocal and Cobre creeks) in order to test regional geological models, and to relate compositional and diagenetic factors with the reservoir quality.Sandstones from the Caballos Formation document a change from texturally immature- subarkoses, litharenites to quartz arenites. High quartz contents, the presence of feldspar, sedimentary, metamorphic and volcanic lithic suggest mixed provenance, with a major contribution from sedimentary sources. U-Pb dating of detrital zircons reveals age populations that include contributions from Precambrian, Permian, Triassic and Jurassic rocks. These data, together with the compositional trends, suggest that source areas likely include adjacent  massifs from the eastern segment of the Upper Magdalena Valley with similar compositional andtemporal characteristics (Garzón and Macarena Massifs for the southeastern Ocal Section, and the Upper Magdalena Valley massifs and the eastern flank of the Central Cordillera; Ocal Section). The changes in compositional features and detrital geochronology between the upper and lower members of both sections suggest a change in source areas, associated with the erosion and depletion of adjacent uplifts, and the increasing dominance of more distal eastern and western sources, which reflect the end of tectonic instability and the deepening of the basin.The presence of quartz, feldspar, and lithic rock fragments have a major impact on the porosity and permeability of Caballos Formation sandstones. Porosity values are lower in the lower member of the Caballos Formation where diagenesis has altered abundant feldspar and lithic rock fragments to authigenic porefilling clays. Higher porosity and permeability values found in the upper member of the Caballos correspond to a combination of higher quartz contents and the dissolution of meta-stable components during late diagenesis.

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