Structure of lead borate glasses by Raman, 11B MAS, and 207Pb NMR spectroscopies

被引：35

作者：

Chatzipanagis, Konstantinos I. ^{[1
,2
]}

Tagiara, Nagia S. ^{[1
]}

Kamitsos, Efstratios I. ^{[1
]}

Barrow, Nathan ^{[3
]}

Slagle, Ian ^{[4
]}

Wilson, Robert ^{[4
]}

Greiner, Tyler ^{[4
]}

Jesuit, Martha ^{[4
]}

Leonard, Nicholas ^{[4
]}

Phillips, Aaron ^{[4
]}

Reynolds, Bryce ^{[4
]}

Royle, Brock ^{[4
]}

Ameku, Katherine ^{[4
]}

Feller, Steve ^{[4
]}

机构：

[1] Natl Hellen Res Fdn, Theoret & Phys Chem Inst, 48 Vassileos Constantinou Ave, Athens 11635, Greece

[2] European Commiss, Directorate Gen Joint Res Ctr, Directorate F Hlth, Consumers & Reference Mat, Retieseweg 111, B-2440 Geel, Belgium

[3] Johnson Matthey Technol Ctr, Reading RG4 9NH, England

[4] Coe Coll, Phys Dept, 1220 First Ave NE, Cedar Rapids, IA 52402 USA

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2022年 / 589卷

关键词：

Lead borate glasses; Raman; NMR; Structure; Ionic; Covalent; SOLID-STATE NMR; VIBRATIONAL-SPECTRA; SILICATE-GLASSES; COPPER-LEAD; SCATTERING; RANGE; GAMMA; DIFFRACTION; FRACTION;

D O I：

10.1016/j.jnoncrysol.2022.121660

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A multi-spectroscopic investigation of glasses xPbO-(100-x)B2O3, where 30 < x < 80, was undertaken employing Raman, 207Pb static NMR, and 11B MAS NMR spectroscopies. The Raman results were quantified and combined with quantitative NMR results to produce a coherent structural model. The fraction of four-coordinated borons (N4) has a maximum near x = 50, in contrast with alkali modified borates where the maximum is near x = 35-40. In the range x = 30-50, both NMR and Raman spectroscopies indicate that lead ion behaves more ionically. From x = 50-65, the spectroscopic results indicate a change in the lead-oxygen bonding character from ionic to covalent. At similar compositions, the borate network becomes more ionic while remaining under-modified compared to alkali borates; consistent with lead-oxygen bonding being important to the structural evolution. When x > 65, the lead-oxygen bonding becomes significantly covalent.

引用

页数：14

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