Hydroxyl groups in high-purity glasses for fiber optics II: phosphosilicate glasses

2000 ◽  
Author(s):  
Victor G. Plotnichenko ◽  
V. O. Sokolov ◽  
E. B. Kryukova ◽  
Eugeni M. Dianov
Keyword(s):  
Fiber Optics ◽  
High Purity ◽  
Hydroxyl Groups

Hydroxyl groups in high-purity glasses for fiber optics I: silica glasses

2000 ◽  
Author(s):  
Victor G. Plotnichenko ◽  
V. O. Sokolov ◽  
Eugeni M. Dianov
Keyword(s):  
Fiber Optics ◽  
High Purity ◽  
Hydroxyl Groups ◽  
Silica Glasses

Hydroxyl groups in high-purity silica glass

2000 ◽  
Vol 36 (4) ◽  
pp. 404-410 ◽  
Author(s):  
V. G. Plotnichenko ◽  
V. O. Sokolov ◽  
E. M. Dianov
Keyword(s):  
High Purity ◽  
Silica Glass ◽  
Hydroxyl Groups

Scattering from Gas-Phase Synthesized Particles

1989 ◽  
Vol 172 ◽  
Author(s):  
Alan J. Hurd
Keyword(s):  
Surface Tension ◽  
Gas Phase ◽  
Fiber Optics ◽  
High Purity ◽  
Rational Design ◽  
High Porosity ◽  
Phase Synthesis ◽  
Shape Distribution ◽  
Design And Optimization ◽  
Fundamental Knowledge

Rational design and optimization for the next generation of fiber optics requires fundamental knowledge of the processes at each step of production [1], not the least of which is the formation and deposition of the glass precursor particles. Currently, gas-phase synthesis dominates the industry, owing, in part, to the high purity possible for gaseous reagents. However, the production engineer has relatively little control over the microstructure of the boule from which the fiber is drawn because many complex mechanisms take part in the growth and thermophoretic deposition of the precursors. Although it is desirable, for example, to obtain a porous boule in order to facilitate the removal of deleterious hydroxyls, connected porosity is by no means guaranteed. The successful attainment of high porosity depends on a number of variables such as the size distribution [2], internal structure, shape distribution, viscosity, and surface tension of the particles at the instant of deposition.

Thermal properties of high purity zinc-tellurite glasses for fiber-optics

2019 ◽  
Vol 673 ◽  
pp. 192-197 ◽  
Author(s):  
А.M. Kut'in ◽  
А.D. Plekhovich ◽  
К.V. Balueva ◽  
S.E. Motorin ◽  
V.V. Dorofeev
Keyword(s):  
Thermal Properties ◽  
Fiber Optics ◽  
High Purity ◽  
Tellurite Glasses

scholarly journals Synthesis of Acids and Amino Acids by Selective Oxidation of Primary Hydroxyl Groups to Carboxylic acids in Sugars

2021 ◽  
Vol 13 (2) ◽  
pp. 17
Author(s):  
Natarajan Raju ◽  
Rolf E. Swenson
Keyword(s):  
Amino Acids ◽  
Carboxylic Acids ◽  
Selective Oxidation ◽  
High Purity ◽  
Hydroxyl Groups ◽  
Preferential Oxidation ◽  
Sugar Amino Acids ◽  
Primary Hydroxyl ◽  
Specific Oxidation

Preferential oxidation of primary hydroxyls in unprotected sugars and sugar amino acids is reported using inexpensive and readily available reagents. This method offers a specific oxidation protocol for a variety of carbohydrates. The stereochemical integrity of the starting materials was preserved and a simple workup yielded the products in good yields with high purity. The procedure is compatible with base sensitive groups like Fmoc.  Both mono and disaccharides undergo oxidation regioselectively.

High-purity TeO2–WO3–(La2O3,Bi2O3) glasses for fiber-optics

2011 ◽  
Vol 33 (12) ◽  
pp. 1911-1915 ◽  
Author(s):  
V.V. Dorofeev ◽  
A.N. Moiseev ◽  
M.F. Churbanov ◽  
G.E. Snopatin ◽  
A.V. Chilyasov ◽  
...  
Keyword(s):  
Fiber Optics ◽  
High Purity

Hydroxy groups in high-purity glasses for fiber optics III: germanosilicate glasses

2000 ◽  
Author(s):  
Victor G. Plotnichenko ◽  
V. O. Sokolov ◽  
Eugeni M. Dianov
Keyword(s):  
Fiber Optics ◽  
High Purity ◽  
Hydroxy Groups

Investigation of Surface Properties of Titanium Treated with Combined Alkali and Sodium Removal Treatments

2016 ◽  
Vol 840 ◽  
pp. 225-230 ◽  
Author(s):  
Kwok Joon Tan ◽  
Maizlinda Izwana Idris ◽  
Hasan Zuhudi Abdullah
Keyword(s):  
Surface Properties ◽  
High Purity ◽  
Alkali Treatment ◽  
Heat Treatments ◽  
Hydroxyl Groups ◽  
Water Contact ◽  
X Ray ◽  
Sodium Removal ◽  
Titanium Foils ◽  
Purity Titanium

Recent studies revealed the incorporation of sodium removal treatment in between alkali and heat treatments to prepare a sodium-free bioactive surface on titanium. This method has been reported to be more effective than conventional alkali and heat treatments to promote titanium osteointegration. This study aims to investigate the surface properties of high purity titanium after subjected to alkali treatment and subsequent sodium removal treatment. High purity titanium foils were immersed in 5 M NaOH at 60 °C for 24 hours followed by immersion in diluted HCl acid and/or distilled water at 40 °C for a period of time. The surface morphology and composition were examined using Field Emission Scanning Electron Microscope/Energy-Dispersive X-Ray Spectroscopy (FESEM/EDS). The surface wettability was evaluated by water contact angle. The surface functional groups were analysed using Fourier Transform Infrared Spectroscopy (FTIR). It was revealed that alkali and subsequent sodium removal treatments have rendered these samples high wettability and surface energy with the introduction of hydroxyl groups. Furthermore, diluted HCl treatment, water treatment and combination of both treatments removed sodium from the surfaces of alkali-treated titanium effectively (<5wt% Na) without altering existing hydroxyl groups.

Hydroxyl groups in high-purity silica glass

2000 ◽  
Vol 261 (1-3) ◽  
pp. 186-194 ◽  
Author(s):  
V.G. Plotnichenko ◽  
V.O. Sokolov ◽  
E.M. Dianov
Keyword(s):  
High Purity ◽  
Silica Glass ◽  
Hydroxyl Groups
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