Alkali glass for the production of continuous glass fiber

Kolesov, Yu. I.; Kolesova, A. I.

doi:10.1007/bf00677653

Cited by 5 publications

(6 citation statements)

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“…A weak band having B-O stretching vibrations [28] characteristic of BO4 units in diborate groups and a stretching vibration of V=O unit [29] are observed at ~ 884-882 cm -1 . The strong band at about 1009-1007 cm -1 region is characterized by the asymmetric vibrational mode of isolated nonbridging V=O bond [30] of VO 5 arrangement in glass samples A1-A3. The intensity of asymmetrical stretching vibration of isolated non-bridging V=O bond is found to enhance with the increase in the concentration of V 2 O 5 .…”

Section: Resultsmentioning

confidence: 99%

Structural Investigations of xV2O5-(100-x)B2O3 Glass Matrix by Spectroscopic Techniques

Sharma¹,

Ilamathi²

2019

Asian J. Chem.

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Preparation of glasses of xV2O5-(100-x) B2O3 (21 ≤ x ≤ 41) system for x = 21, 31, 41 mol % have been performed using sol-gel process and studied by employing XRD, FT-IR, EPR and UV-visible techniques. The glassy phase was established by powder XRD patterns. Fourier transform infrared red studies of the amorphous samples revealed the appearance of triangular [BO3/2] and tetrahedral [BO4/2] and V = O units. X-band powder EPR studies exhibit partially resolved isotropic lines at 300 K and well resolved hyperfine structure having a 16 line features (8 parallel lines and 8 perpendicular lines) at 77 K. The assignment of EPR parameters, gxx = gyy = g⊥ > gzz = g|| and Azz = A|| > Axx = Ayy = A⊥ is consistent with ground state 2 B2 which confirms that the tetravalent vanadium (3d 1) exists in the glass matrix as vanadyl ion in tetragonally distorted compressed octahedral symmetry having C4v symmetry. UV-visible absorption spectra of glasses exhibit characteristic two ligand field d-d bands in the tetragonal fields of VO 2+ ions. Using EPR parameters and UV-visible data, various molecular orbital bonding parameters were ascertained.

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Section: Resultsmentioning

confidence: 99%

Structural Investigations of xV2O5-(100-x)B2O3 Glass Matrix by Spectroscopic Techniques

Sharma¹,

Ilamathi²

2019

Asian J. Chem.

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“…For AS, the peak positions of three strong bands (P 1 , P 3 and P 4 ) (1089, 808 and 455 cm −1 ) in curve c close to those of SADAs (1097, 801 and 466 cm −1 ). Here P 1 , P 3 and P 4 are related to vibration of Si-O-Si(Al) bands [10].…”

Section: Photoluminescencementioning

confidence: 99%

Breathing Monitor Using Dye-Doped Optical Fiber

Muto¹,

Fukasawa²,

Ogawa³

et al. 1990

Jpn. J. Appl. Phys.

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Amorphous silica aerogels doped with Al 3+ ions (SADAs) were prepared by the sol-gel route and supercritical drying. The visible luminescence of SADAs was measured and compared with that of porous silicon (PS), pure silica aerogels (PSAs) and silica xerogels doped with Al 3+ ions (SXDAs). The effect of annealing on the luminescence intensity of SADAs was investigated. Results show that (1) the luminescent intensity of as-prepared SADAs is much higher than that of as-prepared PSAs and SXDAs after annealing at 300 • C; (2) after annealing at 500 • C, the visible luminescence of SADAs is further substantially enhanced and becomes much higher than that of PS. However, for PSAs and SXDAs after annealing at 500 • C the luminescent intensity is still kept at a very low value in comparison with that of SADAs. The strong visible luminescence appearing in SADAs is ascribed to significant amounts of the twofold coordinated Si (the Si(II) 0 (neutral) centre) in SADAs.

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“…Accordingly, besides E glass fibers, which cover up to 90% of the market provisions for the production of fiber-reinforced polymers, other types of glass fibers were developed such as C fibers, with high resistance to acids, S fibers, with high modulus and high strength or alkali-resistant fibers, AR fibers, to mention only the most common ones. 1 Yet, there are applications of advanced composite materials which would require low cost glass fibers with improved properties, for instance, higher modulus for armor or blades for wind turbines, 2 higher temperature capabilities for metal/ceramic matrix composites, and better chemical resistance, especially in highly basic environments for concrete reinforcement. For this last application, the commercial alkali-resistant glass fibers (AR fibers) are quite expensive due to the high ZrO 2 content (≥ 16wt%), which implies higher melting and drawing temperatures.…”

Section: Introductionmentioning

confidence: 99%

Processing, Mechanical Characterization, and Alkali Resistance of SiliconBoronOxycarbide (SiBOC) Glass Fibers

et al. 2014

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A borosilicate sol-gel solution is synthesized using a mixture of methyltriethoxysilane, dimethyldiethoxysilane, and boric acid. SiBOC gel fibers are produced from the as-synthesized sol-gel solution using a spinning apparatus. Subsequently, SiBOC glass fibers are prepared through pyrolysis under argon atmosphere at 1000°C and 1200°C. Mechanical properties of the SiBOC glass fibers are studied by measuring the tensile strength and the elastic modulus. The results show a high tensile strength -1300 and 1058 MPa, and a high Young modulus -79 and 95.5 GPa, for the fibers prepared at 1000°C and 1200°C, respectively. Furthermore, alkali resistance of the SiB-OC fibers is investigated by measuring the tensile strength after soaking them for 20 h in NaOH and Ca(OH) 2 solutions at 100°C. For comparison, the same measurements are performed on commercial AR and E glass fibers. The SiBOC fibers show excellent alkaline resistance and perform better than commercial AR fibers. Indeed, SiBOC fibers retain 80%-90% of the initial strength after Ca(OH) 2 attack.

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Alkali glass for the production of continuous glass fiber

Cited by 5 publications

References 0 publications

Structural Investigations of xV2O5-(100-x)B2O3 Glass Matrix by Spectroscopic Techniques

Structural Investigations of xV2O5-(100-x)B2O3 Glass Matrix by Spectroscopic Techniques

Breathing Monitor Using Dye-Doped Optical Fiber

Processing, Mechanical Characterization, and Alkali Resistance of SiliconBoronOxycarbide (SiBOC) Glass Fibers

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