Hydration mechanism and sintering characteristics of hydratable alumina with microsilica addition

2019 ◽  
Vol 45 (11) ◽  
pp. 13780-13786 ◽  
Author(s):  
Nana Xu ◽  
Yuanbing Li ◽  
Shujing Li ◽  
Hailu Wang ◽  
Ruofei Xiang ◽  
...  
Keyword(s):  
Hydration Mechanism ◽  
Sintering Characteristics ◽  
Hydratable Alumina

Quantitative Characterization of Hydration of Cement Pastes by Rietveld Phase Analysis and Thermoanalysis

2013 ◽  
Vol 539 ◽  
pp. 19-24 ◽  
Author(s):  
Yong Qi Wei ◽  
Wu Yao
Keyword(s):  
Phase Analysis ◽  
Cement Paste ◽  
Rietveld Method ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Quantitative Characterization ◽  
Cement Pastes ◽  
Hydration Mechanism ◽  
Spot Check

The quantitative characterization of hydration of cement pastes has always been one of focuses of researchers’ attention. Rietveld phase analysis (RPA), a combination of quantitative X-ray diffraction (QXRD) and the Rietveld method, supplies a tool of an enormous potential for that. Although a few of related researches were conducted by RPA, the reported attention was not paid to the neat cement paste with a low w/c ratio. Therefore, this work aimed at the quantitative study on hydration of such a cement paste chiefly by this method, meanwhile, cooperated with the hyphenated technique of thermogravimetry with differential scanning calorimetry (TG-DSC), as a spot check. Results indicated that RPA was a reliable method in quantitatively characterizing hydration of cement pastes, and gave a clear decription of evolution of all main crystal phases in cement pastes; and that the evolution of monosulphate(Afm_12) was also able to be tracked quantitatively. This will help to understand better the hydration mechanism of cement pastes, as well as to investigate quantitatively effects of mineral and chemical admixtures on hydration of composite cementitious systems.

Location of deuterium sites at operating temperature from neutron diffraction of BaIn0.6Ti0.2Yb0.2O2.6−n(OH)2n, an electrolyte for proton-solid oxide fuel cells

2016 ◽  
Vol 18 (23) ◽  
pp. 15751-15759 ◽  
Author(s):  
Angélique Jarry ◽  
Olivier Joubert ◽  
Emmanuelle Suard ◽  
Jean Marc Zanotti ◽  
Eric Quarez
Keyword(s):  
Fuel Cell ◽  
Neutron Diffraction ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide Fuel Cell ◽  
Operating Temperature ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Proton Diffusion ◽  
Hydration Mechanism ◽  
Fundamental Understanding

A fundamental understanding of the doping effect on the hydration mechanism and related proton diffusion pathways are keys to the progress of Proton-Solid Oxide Fuel Cell (H+-SOFC) technologies.

The effect of deactivated phospholipids on joints lubrication: Osteoarthritis and lubricating properties

2021 ◽  
Vol 3 (6) ◽  
pp. 01-03
Author(s):  
Z. Pawlak
Keyword(s):  
Articular Cartilage ◽  
Joint Inflammation ◽  
Phospholipid Content ◽  
Lubrication Mechanism ◽  
Hydration Mechanism ◽  
Synovial Joints ◽  
Lamellar Phases ◽  
Supportive Role ◽  
Synovial Fluids ◽  
Lubricating Properties

PLs bilayers coating the major synovial joints such as knees and hips as the lubricant are responsible for the lubrication of articular cartilage. Lamellar-repulsive effect has been considered as a lubrication mechanism but it is likely that lubricin and hyaluronan with PLs participate in the lubrication process. The molecules of lubricin and hyaluronan adsorbed by PLs have a supportive role and provide the efficient lubrication of synovial joints via the hydration mechanism (~ 80% water content). Lipid profiles of injured and healthy knees’ synovial fluids show significant differences. The phospholipid content in synovial fluid (SF) during joint inflammation, osteoarthritis is significantly higher (2 to 3 times) above the normal concentration of PL, and has a poor boundary-lubricating ability because of deactivated PL molecules. Deactivated PL molecule has no ability to form bilayers, lamellar phases, and liposomes.

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