On the nature of the mobile charge in passivating coatings based on lead-borosilicate glasses

Vlasov, S. I.; Parchinskii, P. B.; Насиров, А. А.; Olmatov, B. A.

doi:10.1134/1.1259424

Cited by 2 publications

(1 citation statement)

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“…It is well-known that changes in speciation within the glass network with even small changes in composition or processing can have large effects on the physical, electrical, and other material properties of amorphous materials. In the case of lead borosilicate and lead alumino-borosilicate glasses, changes in composition (especially PbO concentration) can lead to drastic changes in sintering densities, resistivity, temperature instabilities, microwave properties, microhardness, viscosity, glass transition temperature, and photoconductive properties. − NMR and IR studies by Sudarsan et al. show that changes in the boron and lead contents have a dramatic effect on the bonding arrangements and material properties of borosilicate glasses .…”

Section: Introductionmentioning

confidence: 99%

Local Structure of Amorphous (PbO)_x[(B₂O₃)₁_-_z(Al₂O₃)_z]_y(SiO₂)_y Dielectric Materials by Multinuclear Solid State NMR

et al. 2005

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Structural speciation of glasses in the systems PbO-B 2 O 3 -SiO 2 , PbO-B 2 O 3 -Al 2 O 3 -SiO 2 , and PbO-Al 2 O 3 -SiO 2 were studied using solid state 29 Si, 27 Al, 11 B, and 207 Pb nuclear magnetic resonance (NMR) and Raman spectroscopy. Application of these methods provided insight into the role of Al 2 O 3 incorporation in the lead borosilicate glass networks. The general composition range studied was (PbO) x [(B 2 O 3 ) 1-z (Al 2 O 3 ) z ] y (SiO 2 ) y where x ) 0.35, 0.5, and 0.65, y ) (1x)/2 and z ) 0.0, 0.5, and 1.0. Additional insight was obtained via 27 Al 2D-3QMAS experiments. The 207 Pb spin-echo mapping spectra showed a transition from ionic (Pb 2+ ) to covalently bound lead species with increased PbO contents in the borosilicate glasses. The addition of aluminum to the glass network further enhanced the lead species transition, resulting in a higher relative amount of covalent lead bonding in the high PbO content aluminoborosilicate glass. The number of BO 4 units present in the 11 B MAS NMR decreased with increasing PbO contents for both the borosilicate and the alumino-borosilicate glass systems, with the addition of aluminum further promoting the BO 3 species. A deshielding of the 11 B chemical shifts and the 27 Al chemical shifts with increased lead contents (independent of changes in the quadrupolar coupling) was also observed for both glass systems and was attributed to an increasingly homogeneous glass structure. The 29 Si spectra of the borosilicate and alumino-borosilicate glasses showed a downfield shift with increased PbO concentrations representing incorporation of Pb into the silicate and aluminosilicate networks. The Raman spectra were characterized by increased intensities of Si-O-Pb peaks and decreased intensities of Q 3 peaks with increased PbO contents and showed no evidence of BO 3 or BO 4 ring species. Both the NMR and the Raman data point toward systems where lead is increasingly incorporated into the B 2 O 3 -SiO 2 and the B 2 O 3 -SiO 2 -Al 2 O 3 networks at high PbO concentrations, with the addition of Al 2 O 3 enhancing the trend.

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Section: Introductionmentioning

confidence: 99%

Local Structure of Amorphous (PbO)_x[(B₂O₃)₁_-_z(Al₂O₃)_z]_y(SiO₂)_y Dielectric Materials by Multinuclear Solid State NMR

et al. 2005

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Current Transport Through Lead–Borosilicate Interfacial Glass Layers at the Screen–Printed Silver-Silicon Front Contact

Mäckel

Altermatt

2015

IEEE J. Photovoltaics

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On the nature of the mobile charge in passivating coatings based on lead-borosilicate glasses

Cited by 2 publications

References 2 publications

Local Structure of Amorphous (PbO)_x[(B₂O₃)₁_-_z(Al₂O₃)_z]_y(SiO₂)_y Dielectric Materials by Multinuclear Solid State NMR

Local Structure of Amorphous (PbO)_x[(B₂O₃)₁_-_z(Al₂O₃)_z]_y(SiO₂)_y Dielectric Materials by Multinuclear Solid State NMR

Current Transport Through Lead–Borosilicate Interfacial Glass Layers at the Screen–Printed Silver-Silicon Front Contact

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On the nature of the mobile charge in passivating coatings based on lead-borosilicate glasses

Cited by 2 publications

References 2 publications

Local Structure of Amorphous (PbO)x[(B2O3)1-z(Al2O3)z]y(SiO2)y Dielectric Materials by Multinuclear Solid State NMR

Local Structure of Amorphous (PbO)x[(B2O3)1-z(Al2O3)z]y(SiO2)y Dielectric Materials by Multinuclear Solid State NMR

Current Transport Through Lead–Borosilicate Interfacial Glass Layers at the Screen–Printed Silver-Silicon Front Contact

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Local Structure of Amorphous (PbO)_x[(B₂O₃)₁_-_z(Al₂O₃)_z]_y(SiO₂)_y Dielectric Materials by Multinuclear Solid State NMR

Local Structure of Amorphous (PbO)_x[(B₂O₃)₁_-_z(Al₂O₃)_z]_y(SiO₂)_y Dielectric Materials by Multinuclear Solid State NMR