Vapor-Deposited Ethylbenzene Glasses Approach “Ideal Glass” Density

2019 ◽  
Vol 10 (14) ◽  
pp. 4069-4075 ◽  
Author(s):  
M. S. Beasley ◽  
C. Bishop ◽  
B. J. Kasting ◽  
M. D. Ediger
Keyword(s):  
Glass Density

Nanotube Carbon Structure Tips - A Source of High Field Emission of Electrons

1994 ◽  
Vol 359 ◽  
Author(s):  
Leonid A. Chernozatonskii ◽  
Yu.V. Gulyaev ◽  
Z.Ja. Kosakoyskaja ◽  
N.I. Sinitsyn ◽  
G.V. Torgashov ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Emission ◽  
Quartz Glass ◽  
High Field ◽  
Emission Current ◽  
Carbon Structure ◽  
Glass Density ◽  
And Inversion ◽  
Field Emission Of Electrons

ABSTRACTWe present the finding of experiments of considerable field emission from the films consisting of nanotube carbon structureson various substrates (Si, quartz, glass): density of emission current was up to 1-3 A/cm2 while electric field was about 100 V/μ. The “reconstruction” and “inversion” of field emission have also been observed after current breakdown.

Aerated Concrete Based on Cullet and Liquid Glass

2019 ◽  
Vol 974 ◽  
pp. 362-366
Author(s):  
Svetlana V. Samchenko ◽  
Olga V. Aleksandrova ◽  
Anna A. Zaitseva
Keyword(s):  
Liquid Glass ◽  
Technology Development ◽  
Industrial Wastes ◽  
Energy Technology ◽  
Glass Cullet ◽  
Technical Glass ◽  
Environmental Technology ◽  
Glass Density ◽  
Aerated Concrete ◽  
The Cost

The possibility of using technical glasswork with liquid glass to produce aerated concrete using low-energy technology was considered in the paper. The unsorted technical glass cullet use as a part of aerated concrete will allow the non-decomposing industrial wastes disposal, which makes it possible to speak about the environmental technology development, while reducing the cost of producing effective heat-insulating materials considers its economic efficiency. The optimum liquid glass density was established upon aerated concrete mix receipt, which should be at least 1.23 and not more than 1.35 g / cm3. The technical characteristics of aerated concrete based on cullet and liquid glass obtained in this work are determined. Thermal conductivity of aerated concrete with its density of 150-400 kg / m3 is 0.06 W/m°C. The resulting aerated concrete is recommended for thermal insulation of pipelines both during construction and during their repair.

scholarly journals Novel Highly Degradable Chloride Containing Bioactive Glasses

2015 ◽  
Vol 1 (1) ◽  
Author(s):  
Xiaojing Chen ◽  
Natalia Karpukhina ◽  
Delia S. Brauer ◽  
Robert G. Hill
Keyword(s):  
Chemical Analysis ◽  
Chloride Content ◽  
Tris Buffer ◽  
Silicate Glasses ◽  
Ion Release ◽  
Bioactive Glasses ◽  
Glass Density ◽  
31P Mas Nmr ◽  
First Time

AbstractAddition of CaF2 to a silicate bioactive glass favours formation of fluorapatite, which is less soluble in acidic environment than hydroxyapatite. However, excess CaF2 in the glass is problematic, owing to the formation of crystalline calcium fluoride rather than fluorapatite on immersion. In this paper we investigate chloride as an alternative to fluoride in bioactive silicate glasses and in particular their bioactivity for the first time. Meltderived bioactive glasses based on SiO2-P2O5-CaO-CaCl2 with varying CaCl2 contents were synthesised and characterised by DSC. Chemical analysis of the chloride content was performed by using an ion selective electrode. Glass density was determined using Helium Pycnometry. The glass bioactivity was investigated in Tris buffer. Ion release measurements were carried out by using ICP-OES. The chemical analysis results indicated that the majority of the chloride is retained in the Q2 type silicate glasses during synthesis. Tg and glass density reduced with increasing CaCl2 content. Apatite-like phase formation was confirmed by FITR, XRD and 31P MAS-NMR. The results of the in vitro studies demonstrated that the chloride containing bioactive glasses are highly degradable and form apatite-like phase within three hours in Tris buffer and, therefore, are certainly suitable for use in remineralising toothpastes. The dissolution rate of the glass was found to increase with CaCl2 content. Faster dissolving bioactive glasses may be attractive for more resorbable bone grafts and scaffolds.

A Study on the Vitrification Tests of the Low Level Radioactive Wastes Using Plasma Arc Melter System

2004 ◽  
Author(s):  
Boo Ho Yoon ◽  
Jae Hak Cho ◽  
Sang Chul Lee ◽  
Dong Woo Kang ◽  
Yong Joon Choi ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Nuclear Power ◽  
Power Plants ◽  
Radioactive Wastes ◽  
Plasma Arc ◽  
Micro Hardness ◽  
Radioactive Materials ◽  
Low Level ◽  
Glass Density ◽  
Glass Formulation

For the research on the vitrification of the low-level radioactive wastes (LLRW) produced in nuclear power plants, one pilot plant with plasma arc melter system was built and several tests were done on it. Some surrogate wastes, which were spiked with several materials and were made very similar to the real LLRW, were used for these tests. For the vitrification of the surrogate wastes, the surrogate wastes were classified into the combustible, the non-combustible and the resin. Then each waste was spiked with special materials and was melted in separate. Off-gases produced in each test were picked up and analyzed. Real radioactive materials cesium (Cs) and cobalt (Co) were spiked in each wastes. Data gained from the final glass formulation were follows. Glass density is 2.42 ∼ 2.95(g/cm3), the compressive strength is 30 ∼ 175 Mpa, micro hardness is 5.5 ∼ 5.8 Gpa. The leaching ratio for Co is 1.27×10−4 ∼ 1.08×10−3 (10mL/g) and that for Cs is 2.46×10−3 ∼ 3.23×10−2 (10mL/g). The leaching speed for Co is 4.14×10−7 ∼ 5.53×10−6 (g/m2) and that for Cs is 4.58×10−5 ∼ 3.87×10−4 (g/m2). In off-gas, dioxin & furan is 0.016 mano gram on the average, CO is about 20 ppm, NO2 is about 15 ppm and SO2 is about 15 ppm.

scholarly journals Experimental Evidence for a Bragg Glass Density Wave Phase in a Transition-Metal Dichalcogenide

2015 ◽  
Vol 114 (2) ◽  
Author(s):  
Jun-ichi Okamoto ◽  
Carlos J. Arguello ◽  
Ethan P. Rosenthal ◽  
Abhay N. Pasupathy ◽  
Andrew J. Millis
Keyword(s):  
Transition Metal ◽  
Experimental Evidence ◽  
Density Wave ◽  
Transition Metal Dichalcogenide ◽  
Wave Phase ◽  
Glass Density ◽  
Bragg Glass

scholarly journals SiO2 Glass Density to Lower-Mantle Pressures

2017 ◽  
Vol 119 (21) ◽  
Author(s):  
Sylvain Petitgirard ◽  
Wim J. Malfait ◽  
Baptiste Journaux ◽  
Ines E. Collings ◽  
Eleanor S. Jennings ◽  
...  
Keyword(s):  
Lower Mantle ◽  
Sio2 Glass ◽  
Glass Density

Correlation of Glass Density and Refractive Index—Implications to Density Gradient Construction

1984 ◽  
Vol 29 (3) ◽  
pp. 11729J ◽  
Author(s):  
John I. Thornton ◽  
Carol Langhauser ◽  
David Kahane
Keyword(s):  
Refractive Index ◽  
Density Gradient ◽  
Glass Density
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