Processes for silica glass powder sintering

Samuneva, B.; Vinarov, P.; Georgieva-Dimitrova, Milena Todorova

doi:10.1016/0022-3093(89)90521-8

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“…BPO 4 represents a double‐oxide B 2 O 3 ·P 2 O 5 , and its lattice can be treated like the SiO 2 lattice, in which the Si atoms are alternately replaced by the atoms of B and P 39,40 . The appearances of BPO 4 in the crystallization samples (Figure 3) are shown the important role of PO 4 and BO 4 structural units in the network of the obtained glasses.…”

Section: Resultsmentioning

confidence: 97%

“…The opposite picture is observed in alkaline-borophosphate glasses, in which the lack of oxygen is compensated by oxygen from alkali metal oxides. 38 BPO 4 represents a double-oxide B 2 O 3 ⋅P 2 O 5 , and its lattice can be treated like the SiO 2 lattice, in which the Si atoms are alternately replaced by the atoms of B and P. 39,40 The appearances of BPO 4 in the crystallization samples (Figure 3) are shown the important role of PO 4 and BO 4 structural units in the network of the obtained glasses. Therefore, it can be supposed that the studied glasses contain P-O-B linkages within structural network.…”

Section: Inset)mentioning

confidence: 99%

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Structural, thermal, and DC conductivity properties of WO₃–P₂O₅ glasses doped with B₂O₃

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2022

Int J of Appl Glass Sci

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In this study, glasses in composition 70WO3–(30 − х)P2O5–хB2O3 (0 ≤ х ≤ 20 mol%) were prepared by melt quenching method. The glass formation, structure, and thermal and electrical properties are discussed. Homogeneous glasses were obtained at x = 0–10 mol% B2O3, whereas glasses with x = 15 and 20 contain microinclusions of WO3. The glass transition temperature decreases from 709 to 531.6°C with increasing B2O3 content, as well as the crystallization temperature and the thermal stability. The structure of the glasses was studied by Raman spectroscopy and infrared spectroscopy. The Raman spectra are characterized by a band near 995 cm−1, a broad band at 788–800 cm−1, and a band near 675 cm−1 ascribed to vibrations of W–O–P, W–O–W, and P–O–B bonds, respectively. The Fourier‐transform infrared spectra show vibrational bands due to characteristic phosphate and borate groups. Tetrahedral BO4 units prevail in the structural network. The electrical conductivity of the glasses decreased with x content due to the growth of WO3‐deficient regions.

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Section: Resultsmentioning

confidence: 97%

Section: Inset)mentioning

confidence: 99%

Structural, thermal, and DC conductivity properties of WO₃–P₂O₅ glasses doped with B₂O₃

Першина

2022

Int J of Appl Glass Sci

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Processes for silica glass powder sintering

Cited by 1 publication

References 6 publications

Structural, thermal, and DC conductivity properties of WO₃–P₂O₅ glasses doped with B₂O₃

Structural, thermal, and DC conductivity properties of WO₃–P₂O₅ glasses doped with B₂O₃

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Processes for silica glass powder sintering

Cited by 1 publication

References 6 publications

Structural, thermal, and DC conductivity properties of WO3–P2O5 glasses doped with B2O3

Structural, thermal, and DC conductivity properties of WO3–P2O5 glasses doped with B2O3

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Structural, thermal, and DC conductivity properties of WO₃–P₂O₅ glasses doped with B₂O₃

Structural, thermal, and DC conductivity properties of WO₃–P₂O₅ glasses doped with B₂O₃