NUCLEAR-QUADRUPOLE RESONANCE OF BORON IN BORATE GLASSES

被引：50

作者：

GRAVINA, SJ ^{[1
]}

BRAY, PJ ^{[1
]}

机构：

[1] BROWN UNIV,DEPT PHYS,PROVIDENCE,RI 02912

来源：

JOURNAL OF MAGNETIC RESONANCE | 1990年 / 89卷 / 03期

关键词：

D O I：

10.1016/0022-2364(90)90334-6

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A continuous wave nuclear quadrupole resonance spectrometer that has a high sensitivity even at low frequencies has been built. Boron and aluminum NQR has been detected in the region 200 kHz to 1.4 MHz. For the first time, boron NQR has been detected in a glass. The NQR spectrum of pure B203 glass is consistent with 85 ± 2% of the boron atoms belonging to boroxol rings. In sodium borate glasses, the number of borons in boroxol rings decreases with increasing sodium content, until when sodium oxide comprises 20 mol% of the glass less than 2% of the borons are in boroxol rings. © 1990.

引用

页码：515 / 521

页数：7

共 20 条

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