Kinetics of dissolution of a biocide soda-lime glass powder containing silver nanoparticles

This study aims to provide a thermophysical characterization of a new economical and green mortar. This material is characterized by partially replacing the cement with recycled soda lime glass. The cement was partially substituted (10, 20, 30, 40, 50 and 60% in weight) by glass powder with a water/cement ratio of 0.4. The glass powder and four of the seven samples were analyzed using a scanning electron microscope (SEM). The thermophysical properties, such as thermal conductivity and volumetric specific heat, were experimentally measured in both dry and wet (water saturated) states. These properties were determined as a function of the glass powder percentage by using a CT-Meter at different temperatures (20 °C, 30 °C, 40 °C and 50 °C) in a temperature-controlled box. The results show that the thermophysical parameters decreased linearly when 60% glass powder was added to cement mortar: 37% for thermal conductivity, 18% for volumetric specific heat and 22% for thermal diffusivity. The density of the mortar also decreased by about 11% in dry state and 5% in wet state. The use of waste glass powder as a cement replacement affects the thermophysical properties of cement mortar due to its porosity as compared with the control mortar. The results indicate that thermal conductivity and volumetric specific heat increases with temperature increase and/or the substitution rate decrease. Therefore, the addition of waste glass powder can significantly affect the thermophysical properties of ordinary cement mortar.

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Revealing the nanoparticles aspect ratio in the glass-metal nanocomposites irradiated with femtosecond laser

Scientific Reports ◽

10.1038/srep13746 ◽

2015 ◽

Vol 5 (1) ◽

Cited By ~ 3

Author(s):

S. Chervinskii ◽

R. Drevinskas ◽

D. V. Karpov ◽

M. Beresna ◽

A. A. Lipovskii ◽

...

Keyword(s):

Silver Nanoparticles ◽

Aspect Ratio ◽

Femtosecond Laser ◽

Laser Fluence ◽

Spherical Shape ◽

Soda Lime ◽

Prolate Spheroid ◽

Soda Lime Glass ◽

Experimental Conditions ◽

Glass Metal

Abstract We studied a femtosecond laser shaping of silver nanoparticles embedded in soda-lime glass. Comparing experimental absorption spectra with the modeling based on Maxwell Garnett approximation modified for spheroidal inclusions, we obtained the mean aspect ratio of the re-shaped silver nanoparticles as a function of the laser fluence. We demonstrated that under our experimental conditions the spherical shape of silver nanoparticles changed to a prolate spheroid with the aspect ratio as high as 3.5 at the laser fluence of 0.6 J/cm2. The developed approach can be employed to control the anisotropy of the glass-metal composites.

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Effect of embedded silver nanoparticles on refractive index of soda lime glass

10.1063/1.5032449 ◽

2018 ◽

Cited By ~ 1

Author(s):

Sonal ◽

Annu Sharma ◽

Sanjeev Aggarwal

Keyword(s):

Silver Nanoparticles ◽

Refractive Index ◽

Soda Lime ◽

Soda Lime Glass

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Kinetics Study on Controlled Crystallization of a Ca2ZnSi2O7 Phase in Materials Obtained from Vitrification of Metallurgical Slag and Recycled Soda Lime Glass

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.68.114 ◽

2010 ◽

Vol 68 ◽

pp. 114-119 ◽

Cited By ~ 1

Author(s):

Erika Iveth Cedillo González ◽

Juan Jacobo Ruiz Valdés ◽

Anabel Álvarez Méndez

Keyword(s):

Thermal Analysis ◽

Differential Thermal Analysis ◽

Soda Lime ◽

Exothermic Peak ◽

Metallurgical Slag ◽

Isothermal Kinetics ◽

Soda Lime Glass ◽

Structural Applications ◽

Minor Peak ◽

Kinetics Of

Non isothermal kinetics of a glass obtained from a mixture of 59 wt % of metallurgical slag and 41 wt % of soda lime recycled glass was studied by differential thermal analysis (DTA), x-ray diffraction (XRD) and scanning electron microscopy (SEM). The curves of differential thermal analysis revealed the presence of two exothermic peaks, a major peak at 810 °C and a minor peak at 1085 °C. DRX revealed that the first exothermic peak corresponds to the formation of hardystonite, Ca2ZnSi2O7 and aegirine, NaFe3+Si2O6, while the second minor peak corresponds to the formation of zinc ferrite, ZnFe2O4. The activation energy of the crystallization, Ea, was calculated with the Kissinger equation from DTA data, obtained at different heating rates. In addition, the particle size effect on the kinetics of crystallization was studied. The Avrami factor, n, was calculated with Augis-Bennett method. The values of obtained Ea increase with bigger particle sizes and also the value of n, indicating that for small particles the superficial crystallization mechanism is predominant, while bulk mechanism is preferential on large particles. Obtained materials are suitable for some structural applications.

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Alkali emission accompanying fracture of sodium silicate glasses

Journal of Materials Research ◽

10.1557/jmr.1991.1358 ◽

1991 ◽

Vol 6 (6) ◽

pp. 1358-1368 ◽

Cited By ~ 17

Author(s):

S.C. Langford ◽

L.C. Jensen ◽

J.T. Dickinson ◽

L.R. Pederson

Keyword(s):

Complex Surface ◽

Soda Lime ◽

Charge Carriers ◽

Soda Lime Glass ◽

Surface Ionization ◽

Fracture Event ◽

Defect Sites ◽

Glass Surfaces ◽

Physical And Chemical ◽

Kinetics Of

Measurements of atomic Na emission accompanying the fracture of sodium trisilicate glass and a soda lime glass in vacuum were made by quadrupole mass spectroscopy and surface ionization techniques. Peak Na° emission intensities occur some 3–6 ms after the fracture event and decay over tens of milliseconds. This behavior is attributed to the diffusion of Na+ ions into a layer of damaged material at the surface where the ions are subsequently neutralized and thermally emitted as Na°. Charge carriers generated during fracture and subsequently trapped at defect sites apparently play important roles in charge compensating Na+ diffusion and in neutralizing Na+. During the first 300 ms following fracture, we also observe intense, short lived (400 μs) bursts in Na° emission which may be associated with catastrophic relaxation of residual stresses. The kinetics of Na emission suggest that the relaxation of newly formed glass surfaces involves rather complex surface physical and chemical processes.

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