Results 31 to 40 of about 4,688 (226)

Development of Cordierite Honeycomb Ceramics Using Cordierite Waste

IOP Conference Series: Materials Science and Engineering, 2011
Cordierite ceramics (2MgO2Al2O35SiO2) were prepared from cordierite waste from refractory industry. The composition of the mixture composed of 70 wt% cordierite waste powder, 23 wt% talc and 7 wt% alumina mixing with binders, plasticizer, lubricant and water to form ceramic dough. The cordierite samples were sintered at 1250-1350 °C for 2 h.
C Mongkolkachit, P Aungkavattana, W Gosuphan, T Wasanapiarnpong   +3 more
openaire   +1 more source

Effect of glutinous rice flour and dried egg white in fabrication of porous cordierite by gel casting method

Cerâmica
In this study, cordierite was produced using MgO, SiO2 and Al2O3 as raw materials through glass route method. The raw materials were mixed for 6 h and the mixture was melted at 1550 °C and then water quenched.
A. Kamil Fakhruddin, Hasmaliza Mohamad
doaj   +1 more source

Adjustment errors of sunstones in the first step of sky-polarimetric Viking navigation: studies with dichroic cordierite/ tourmaline and birefringent calcite crystals [PDF]

Royal Society Open Science, 2016
According to an old but still unproven theory, Viking navigators analysed the skylight polarization with dichroic cordierite or tourmaline, or birefringent calcite sunstones in cloudy/foggy weather.
Dénes Száz, Alexandra Farkas, Miklós Blahó, András Barta, Ádám Egri, Balázs Kretzer, Tibor Hegedüs, Zoltán Jäger, Gábor Horváth   +8 more
doaj   +1 more source

Geochemistry and mineral chemistry of pelitic gneiss of Ikare area, southwestern Nigeria

Heliyon, 2021
This study conducts Electron Probe Microanalysis (EPMA), X-ray Fluorescence (XRF) and Laser Ablation Inductively Coupled Plasma Spectrometry (LA-ICP-MS) analysis on the pelitic gneiss of the Basement complex of Nigeria.
Ehitua Julius Oziegbe, Onesmus Ojok Ocan, Gelu Costin, Péter Horváth   +3 more
doaj   +1 more source

Kinetics of specific surface area change using the Boltzmann model [PDF]

Science of Sintering, 2009
During sintering of the 2MgO-2Al2O3-5SiO2 system, cordierite, an attractive ceramic material because of its properties, is obtained. Effects of mechanochemical activation of stoichiometric mixtures, performed to investigate possibilities of lowering ...
Đorđević N., Martinović S., Vlahović M., Jovanić P., Vidojković V., Boljanac T.   +5 more
doaj   +1 more source

Variable Sr Diffusion and Implications for Rb–Sr Biotite Geochronology

Journal of Metamorphic Geology, EarlyView.
ABSTRACT The rubidium–strontium (Rb–Sr) system has a long pedigree as a geochronological tool that relies on the application of an isochron approach. In particular, biotite contains strongly radiogenic Rb–Sr isotopes, and thus can yield meaningful crystallisation or cooling ages via this approach. However, the response of the Rb–Sr system in biotite to
Riley Rohrer, Christopher L. Kirkland, Hugo Olierook, Tim Johnson, Katy Evans   +4 more
wiley   +1 more source

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source

Role of acid-base interactions in synthesis of cordierite from talc and sillimanite group minerals [PDF]

Science of Sintering, 2013
It has been found that the mechanical activation of mixtures of sillimanite group minerals with talc and silica additives in grinding-activating devices with periodic and flow action provides significant acceleration of their interaction with ...
Avvakumov E.G., Lepezin G.G., Gusev A.A., Vinokourova O.B.   +3 more
doaj   +1 more source

Emergence of Continents Stabilized the Bioavailability of Boron

Terra Nova, EarlyView.
ABSTRACT Boron is an essential element for the development of life on Earth; borates stabilize ribose in prebiotic reactions and facilitate metabolism in higher plants. There is, however, a relatively narrow surface boron concentration range over which borates stabilize and serve as a micronutrient rather than a toxin.
Brendan V. Dyck, Jon Wade
wiley   +1 more source

Fluid evolution from quartz veins in micaschists from the thermal aureole around the Acari batholith, Northeast Brazil

Geologia USP. Série Científica, 2021
Micaschists that host the Acari batholith (Ediacaran age, 572 to 577 My) are characterized by a large number of quartz veins. The veins are more abundant in higher-temperature metamorphic zones and, together with lower metamorphic zones, form an aureole ...
Laécio Cunha de Souza, Regina Celia de Oliveira Brasil Delgado, Heitor Neves Maia   +2 more
doaj