Abstract
Defective nanostructured h-BN, with different structural characteristics, can be prepared by mechanical milling under hydrogen and argon atmospheres. When h-BN was mechanically milled under a hydrogen atmosphere, hydrogen could be trapped by the B - and N-dangling bonds formed; the amount of which reached up to 2.6 mass% after 80 h milling. The absorbed hydrogen can be released only as molecular hydrogen starting from about 570 K. As is clarified by a combination of TDS and IR measurements, the hydrogen detrapped from B-H and N-H bonds dominates the desorption at the lower and higher temperature ranges, respectively. After the nanostructured h-BN was heated to 1173 K, some of the hydrogen was still trapped by N-H bonds where, correspondingly, no recrystallization was detected.
Original language | English |
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Pages (from-to) | 1235-1239 |
Number of pages | 5 |
Journal | Applied Physics A: Materials Science and Processing |
Volume | 78 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2004 May |
Externally published | Yes |
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)