Network of Bi2O3–Al2O3–NaPO3 glasses studied by solid‐state nuclear magnetic resonance spectroscopy. Issue 8 (29th April 2022)

• Record Type: Journal Article
• Authors: Zhang, Ruili; Ma, Delong; Wang, Jianrong; Chen, Yang; Hu, Xun
• Is Part Of: Journal of the American Ceramic Society. Volume 105:Issue 8(2022)
• Page Start: 5167
• Page End: 5177
• Publication Date: 2022-04-29
• Subjects: bismuth oxide -- glass -- solid‐state NMR -- structure; Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.18485
• Languages: English
• ISSNs: 0002-7820

Abstract

Abstract: A detailed structural investigation of a series of phosphate laser glasses with composition x Bi2 O3 – y Al2 O3 –(100 − x – y )NaPO3 ( x = 0, 10; y = 0, 5, 10, 15, 20) has been conducted using solid‐state nuclear magnetic resonance (NMR) techniques and X‐ray photoelectron spectroscopy (XPS). 31 P MAS NMR spectroscopy demonstrates that the addition of Bi2 O3 and Al2 O3 leads to the depolymerization of the phosphorus chain in the process of Q 2 → Q 1 → Q 0 . The various phosphorus species (Q n, n = 0, 1, 2) are identified by 31 P single pulse, 31 P{ 27 Al} rotational echo adiabatic passage double resonance, 31 P{ 27 Al} J‐coupling‐based heteronuclear multiple‐quantum coherence, and 1D refocused INADEQUATE experiments. The results of 23 Na{ 31 P}, 31 P{ 23 Na}, 27 Al{ 31 P} rotational echo double resonance, and XPS consistently confirm that Na +, Al 3+, and Bi 3+ ions are all bound by phosphorus tetrahedron [PO4 ] 3− . No bond is formed between these glass modifiers. Based on the complementary evidence from previous experiments, comprehensive local structure models are developed for these Bi2 O3 –Al2 O3 –NaPO3 glasses.