Influence of the physicochemical state of impurities on the strength of silica fibers

Eron’yan, M. A.; Zlobin, P. A.; Kozlova, Maria; Levit, L. G.; Romashova, E. I.; Khokhlov, A. V.; Tsibinogina, M. K.

doi:10.1134/s1087659606060058

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…Fiber strengthening due to the occurrence of compressive stresses in the cladding does not affect the statistical nature of the scatter of strength measurement data. As known, this depends on the distribution of microinhomogeneity of impurity nature [11]. The source of defects can be dust particles in the atmosphere of the graphite furnace used for ber drawing [15].…”

Section: Resultsmentioning

confidence: 99%

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Congruent Evaporation of Borosilicate Glass Strengthening Silica Fiber

Eronyan,

Kulesh,

Tsibinogina

et al. 2024

Silicon

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The work aims to study the evaporation process of borosilicate glass used for strengthening of silica ber light guides. The composition of glass after high-temperature treatment was determined based on refractive index measurement. It was found that at temperature 2100 o C two-component SiO 2 -B 2 O 3 glass vaporizes without changing its composition at a boron oxide content of ≈ 4 mol% in both oxygen and nitrogen atmospheres. The IR absorption spectra of borosilicate glass indicate the absence of boroxol rings of B 2 O 3 , which can explain the low partial pressure of its vapors compared to the ideal melt state. It is experimentally shown that the content of only 1 mol % B 2 O 3 in the outer cladding of silica ber increases its strength by 10% when the drawing temperature is reduced to 1900°C. Such a small addition of boron oxide to silica glass decreases its viscosity, ensuring the occurrence of compressive stresses in the borosilicate cladding.

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Section: Resultsmentioning

confidence: 99%

“…Under the same conditions, ber was drawn from a similar preform without borosilicate claddingto evaluate its strengthening effect. Fiber strength (σ) was measured by two-point bending at room temperature and calculated according to formula [11]:…”

Section: Methodsmentioning

confidence: 99%

Congruent Evaporation of Borosilicate Glass Strengthening Silica Fiber

Eronyan,

Kulesh,

Tsibinogina

et al. 2024

Silicon

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“…However, despite various methods of such ber production, their strength does not exceed 6 GPa [2]. Works [3][4][5][6][7] consider the factors constraining the development of the processes to obtain bers with strength close to the theoretical level for SG.…”

Section: Introductionmentioning

confidence: 99%

Cr2O3 Doping Effect on Silica Glass Cooling Rate

Eron’yan

Parfenov

Kulesh

et al. 2022

Silicon

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In this paper we present the results on the effect of the SiO 2 melt cooling rate on the morphology of its surface. The method of atomic force microscopy explores a surface roughness of the silica glass cooled at different rates after its heating up to more than 2100 о С. The study compares three modes of cooling glass rods with a diameter of 14 mm: convective heat exchange with the surrounding air, quenching with dropping the sample into a vessel with water, and radiation of silica glass doped with 0.1 % Cr 2 O 3 . The surface roughness of silica glass in the second and third modes of cooling was signi cantly less than in the conditions of convective heat exchange. Doping the silica glass with Cr 2 O 3 increases the heat exchange coe cient by 2 times and decreases the surface roughness. The results of the research can contribute to improving the mechanical and optical properties of silica glass light guides.

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“…Strength of silica fibers with a diameter of 125mm is equal to 6GPa. It is determined by surface defects of 6nm in size, which can arise due to the processes of liquation and segregation in the presence of trace impurities [3] or crystallization of glass [4]. An increase in the cooling rate of the SG can counteract the indicated defect formation processes.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Cooling Rate of Silica Glass on Its Surface Relief

Eron’yan

2021

AJBSR

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The method of atomic force microscopy explores a roughness of a surface of the silica glass cooled with different velocity from temperature 2300 °C. It is compared two modes of cooling of a glass rods with a diameter of 16mm: convective heat exchange with the surrounding air and quenching with dropping the sample into a vessel with water. The roughness of a surface of a silica glass in the second mode of cooling was essentially less that can promote magnification of its strength. The results of these studies may turn out to be promising in terms of increasing the strength and reliability of silica optical fibers used in laser surgery.

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Influence of the physicochemical state of impurities on the strength of silica fibers

Cited by 8 publications

References 6 publications

Congruent Evaporation of Borosilicate Glass Strengthening Silica Fiber

Congruent Evaporation of Borosilicate Glass Strengthening Silica Fiber

Cr2O3 Doping Effect on Silica Glass Cooling Rate

Influence of the Cooling Rate of Silica Glass on Its Surface Relief

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