Analysis of Reaction Products of Micro-Crystal Mixture of Graphite Hexagonal Boron Nitride with Water under the High-Temperature and High-Pressure

In this paper, the possibility of synthesizing the boron-carbon-nitride (B-C-N) compound by water catalyst has been investigated. The micro-crystal mixture of graphite and hexagonal boron nitride (hBN) was obtained by ball-milling. Under the temperature of 800~1 500 ℃ and the pressure of 6.1 GPa, this mixture reacted with water. By XRD and XPS, we analyzed the reaction products of the mixture with water, and found that the recrystallizing graphite formed and the crystallinity of graphite increased gradually when temperature increased, but recrystallizing hexagonal boron nitride (hBN) and cubic boron nitride (cBN) were not found. When the ball-milling was not sufficient, the XRD spectra peak of the micro-crystal mixture of graphite and hexagonal boron nitride (hBN) had not been widened sufficiently. The crystal of graphite and cubic boron nitride (cBN) were found, but the B-C-N crystal was not found.