Phase transformation of boron nitride under hypothermal conditions

✍ Scribed by Gang Lian; Xiao Zhang; Lingling Zhu; Deliang Cui; Qilong Wang; Xutang Tao

• Book ID: 104030331
• Publisher: Elsevier Science
• Year: 2009
• Tongue: English
• Weight: 468 KB
• Volume: 182
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1016/j.jssc.2009.02.021

✦ Synopsis

Phase transformation among different boron nitride (BN) phases in hydrothermal solution was investigated. It was found that hexagonal boron nitride (hBN) firstly formed in the solution at relatively low temperature (i.e., 220 1C). After that, a spot of hBN began to transform into wurtzite boron nitride (wBN) and cubic boron nitride (cBN) at 230 1C. More and more hBN converted into wBN and cBN with the increase in temperature, and this transformation process completed at 300 1C. In this paper, we have explained the mechanism of the above phase transformation by using a reported ''puckering mechanism''.