Reduction in internal friction in silica glass with high OH content

Лунин, Б. С.; Tokmakov, K. V.

doi:10.1111/jace.16187

Cited by 9 publications

(6 citation statements)

References 40 publications

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“…[ 14 ] Lunin and Tokmakov have argued that highly stressed rings in

{SiO}_{2}

, like 3‐MRs and 4‐MRs, are associated with mechanical loss. [ 63 ] Granata et al have shown a correlation of mechanical loss with the density of 3‐MRs in

{SiO}_{2}

. [ 14 ] Figure 6 shows BA distribution in

{SiO}_{2}

and

{GeO}_{2}

.…”

Section: Resultsmentioning

confidence: 99%

Annealing‐Induced Changes in the Atomic Structure of Amorphous Silica, Germania, and Tantala Using Accelerated Molecular Dynamics

Prasai

Bassiri

Cheng

et al. 2021

Physica Status Solidi (b)

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The effects of annealing on the atomic structures of SiO 2 , GeO 2 , and Ta 2 normalO 5 are investigated using accelerated molecular dynamics (MD) simulations. Using population annealing with Boltzmann resampling to expedite the MD simulations, it is shown that annealed models demonstrate subtle but statistically significant changes in the structure. Consistent with experiments, the simulations show that effects of annealing on the atomic structures of these amorphous oxides are more pronounced in the medium‐range order than in the short‐range order.

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“…[ 14 ] Lunin and Tokmakov have argued that highly stressed rings in

{SiO}_{2}

, like 3‐MRs and 4‐MRs, are associated with mechanical loss. [ 63 ] Granata et al have shown a correlation of mechanical loss with the density of 3‐MRs in

{SiO}_{2}

. [ 14 ] Figure 6 shows BA distribution in

{SiO}_{2}

and

{GeO}_{2}

.…”

Section: Resultsmentioning

confidence: 99%

Annealing‐Induced Changes in the Atomic Structure of Amorphous Silica, Germania, and Tantala Using Accelerated Molecular Dynamics

Prasai

Bassiri

Cheng

et al. 2021

Physica Status Solidi (b)

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show abstract

“…The Qfactor of such resonators (equal to the reciprocal of the loss) exceeds 10 8 . 1,2 Low mechanical loss is exploited in hemispherical resonator gyroscopes used for the purpose of navigation. [3][4][5] Another example of low loss (high-Q) resonators are the test masses of modern interferometric gravitational-wave detectors.…”

Section: Introductionmentioning

confidence: 99%

“…Mechanical resonators fabricated from pure silica glass show extremely low levels of mechanical loss. The Q ‐factor of such resonators (equal to the reciprocal of the loss) exceeds 10 8 1,2 . Low mechanical loss is exploited in hemispherical resonator gyroscopes used for the purpose of navigation 3–5 .…”

Section: Introductionmentioning

confidence: 99%

The formation of microcrystalline defects on the surface of silica glass arising from mechanochemical processing

Лунин

Tokmakov

2022

Int J of Appl Glass Sci

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The aim of this article is to study the nature of the defects arising on the surface of silica glass during mechanical processing followed by chemical cleaning and etching. Such defects manifest themselves as a narrow Raman peak near 85 cm -1 . It is shown that chemical etching of the ground surface of silica glass leads to the formation of microcrystalline defects embedded at the depth of the near-surface layer. Defects of this kind create heterogeneities in the structure of the atomic network and increase internal friction in silica glass mechanical resonators. This phenomenon should be taken into account when developing the technology for fabrication of high-Q resonators.

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“…The CVD synthesis of silica glass is mainly based on flame hydrolysis reaction, in which silicon‐containing compounds (e.g., SiCl 4 , organosilicone, etc.) react in an oxygen‐hydrogen flame to form SiO 2 particles 5 . In direct CVD method, the flame hydrolysis reaction works at high temperatures, and the melted SiO 2 particles deposit on the substrate to form silica glass directly after cooling 6 .…”

Section: Introductionmentioning

confidence: 99%

“…react in an oxygen-hydrogen flame to form SiO 2 particles. 5 In direct CVD method, the flame hydrolysis reaction works at high temperatures, and the melted SiO 2 particles deposit on the substrate to form silica glass directly after cooling. 6 By contrast, in two-step CVD method the flame hydrolysis reaction works at lower…”

mentioning

confidence: 99%

Effects of thermal environment on dehydroxylation of porous silica preform in two‐step CVD synthesis

Shang³

et al. 2021

J. Am. Ceram. Soc.

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Hydroxyl (-OH) is one of the main impurities in silica glass which has strong optical absorption near the infrared spectral region and greatly weakens the glass's optical performance. 1 To eliminate the hydroxyl impurities in silica glass, a two-step chemical vapor deposition (CVD) method is developed for fabricating silica glass ingot with low or controllable hydroxyl concentrations, which has drawn wide attentions in recent years. 2,3,4 The CVD synthesis of silica glass is mainly based on flame hydrolysis reaction, in which silicon-containing compounds (e.g., SiCl 4 , organosilicone, etc.) react in an oxygen-hydrogen flame to form SiO 2 particles. 5 In direct CVD method, the flame hydrolysis reaction works at high temperatures, and the melted SiO 2 particles deposit on the substrate to form silica glass directly after cooling. 6 By contrast, in two-step CVD method the flame hydrolysis reaction works at lower

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Reduction in internal friction in silica glass with high OH content

Cited by 9 publications

References 40 publications

Annealing‐Induced Changes in the Atomic Structure of Amorphous Silica, Germania, and Tantala Using Accelerated Molecular Dynamics

Annealing‐Induced Changes in the Atomic Structure of Amorphous Silica, Germania, and Tantala Using Accelerated Molecular Dynamics

The formation of microcrystalline defects on the surface of silica glass arising from mechanochemical processing

Effects of thermal environment on dehydroxylation of porous silica preform in two‐step CVD synthesis

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