Single-burn clinkering of endodontic calcium silicate-based cements: Effects of ZnO in the C3S phase formation and hydration rate

Calcium silicate slag (CSS) is waste slag and it contains a large amount of beta-dicalcium silicate. This study is mainly focused on the effect of CSS on the hydration of cementitious pastes. CSS was used to partly replace cement, and composite pastes containing CSS and cement were prepared. The mineral composition and particle size distribution of CSS were characterized. The chemically combined water of the paste sample was measured at a given test age. Based on the value of chemically combined water, the hydration degree and the hydration rate of composite pastes were analyzed. The flexural strength of the samples was established. The pore structure and micromorphology of the sample were also observed. The results indicate the chemically combined water decreased, the hydration degree decreased, the hydration rate declined, and the spherical micromorphology of the calcium silicate hydrate gel was reduced after more cement was replaced by CSS in the composite pastes. Besides, the amount of pores increased, its size was bigger, and air content in the pore was higher. However, flexural strength was lower. CSS has a significant impact on the hydration of cementitious pastes, and it is thus suitable to regulate hydration.

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Thermodynamic Analysis of V-concentrating Phase Formation in V-bearing Steelmaking Slag Modified by MgO

High Temperature Materials and Processes ◽

10.1515/htmp-2014-0071 ◽

2015 ◽

Vol 34 (6) ◽

Cited By ~ 3

Author(s):

Liushun Wu ◽

Wei Gao ◽

Dawei Xie ◽

Liaosha Li ◽

Yuanchi Dong

Keyword(s):

Solid Solution ◽

Magnesium Oxide ◽

Thermodynamic Analysis ◽

Phase Formation ◽

Calcium Silicate ◽

Experimental Results ◽

Calcium Ferrite ◽

Steelmaking Slag

AbstractIn the study, magnesium oxide acting as modifier was added to V-bearing steelmaking slag to concentrate vanadium, and then the effect of magnesium oxide on the formation of V-concentrating phase during cooling was investigated. Experimental results show that, in the case of the original slag, di-calcium silicate along with most of vanadate and phosphate in the slag forms solid solution, calcium ferrite which contains small part of vanadium in the slag and matrix without vanadium in turn precipitate during slowly cooling; For the sample with 8% MgO addition, two new phases (merwinite and V-concentrating phase) generate during slowly cooling, and the amount of di-calcium silicate decreases. Merwinite phase doesn’t contain vanadium, and V-concentrating phase (Ca

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Characterization of reactive phase formation in sputter-deposited Ni/Al multilayer thin films using TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100167469 ◽

1996 ◽

Vol 54 ◽

pp. 1000-1001

Author(s):

G. Lucadamo ◽

K. Barmak ◽

C. Michaelsen

Keyword(s):

Thin Films ◽

Phase Formation ◽

Dark Field ◽

Nickel Layer ◽

Multilayer Thin Films ◽

Cross Sectional ◽

Dark Field Imaging ◽

Transmission Electron ◽

Sputter Deposited ◽

Constant Heating

The subject of reactive phase formation in multilayer thin films of varying periodicity has stimulated much research over the past few years. Recent studies have sought to understand the reactions that occur during the annealing of Ni/Al multilayers. Dark field imaging from transmission electron microscopy (TEM) studies in conjunction with in situ x-ray diffraction measurements, and calorimetry experiments (isothermal and constant heating rate), have yielded new insights into the sequence of phases that occur during annealing and the evolution of their microstructure.In this paper we report on reactive phase formation in sputter-deposited lNi:3Al multilayer thin films with a periodicity A (the combined thickness of an aluminum and nickel layer) from 2.5 to 320 nm. A cross-sectional TEM micrograph of an as-deposited film with a periodicity of 10 nm is shown in figure 1. This image shows diffraction contrast from the Ni grains and occasionally from the Al grains in their respective layers.

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Analysis of some adsorption isotherms on calcium silicate hydrates

Journal of Biochemical Toxicology ◽

10.1002/jbt.2570270109 ◽

1977 ◽

Vol 27 (1) ◽

pp. 48-54

Author(s):

Gerald C. Bye ◽

Gilbert O. Chigbo

Keyword(s):

Adsorption Isotherms ◽

Calcium Silicate ◽

Calcium Silicate Hydrates

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In-situ investigation by X-ray diffraction and wafer curvature of phase formation and stress evolution during metal thin film – silicon reactions

Zeitschrift für Kristallographie Supplements ◽

10.1524/zksu.2007.2007.suppl_26.81 ◽

2007 ◽

Vol 2007 (suppl_26) ◽

pp. 81-89

Author(s):

O. Thomas

Keyword(s):

Thin Film ◽

Phase Formation ◽

Stress Evolution ◽

X Ray Diffraction ◽

X Ray ◽

Wafer Curvature ◽

Thin Film Silicon ◽

Metal Thin Film ◽

In Situ Investigation

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Features of phase formation at the interfaces of structural elements in multi-component ceramics based on Ti-Al-C

Functional materials ◽

10.15407/fm26.04.748 ◽

2019 ◽

Vol 26 (3) ◽

Keyword(s):

Phase Formation ◽

Structural Elements

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On the trustability of semi-empirical methods to the calculation of gas phase formation enthalpies of inorganic compounds containing heavy metals: tin borates

10.26434/chemrxiv.5393953.v1 ◽

2017 ◽

Author(s):

Robson de Farias

Keyword(s):

Heavy Metals ◽

Gas Phase ◽

Phase Formation ◽

Inorganic Compounds ◽

Formation Enthalpy ◽

Computational Time ◽

Gas Formation ◽

Formation Enthalpies ◽

Knudsen Effusion Mass Spectrometry ◽

Semi Empirical

In the present work, are calculated the gas formation enthalpies (SE; PM3 and PM6) for tin borates: SnB2O4 and Sn2B2O5. The calculated values are compared with experimental ones, obtained by Knudsen effusion mass spectrometry [3]. It is shown that SE methods, besides their lower computational time consuming can, indeed, provide reliable gas phase formation enthalpy values for inorganic compounds containing heavy metals.

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