| Dispersion of CeO2 Nanoparticles on Hexagonal
Boron Nitride by a Simple CVD Method |
Mengni Ge,1 Jianfeng Zhang,1,* Yahui Li,1 Rong Tu2 and Takashi Goto3
pages : 127-131
DOI : 10.1080/0371750X.2018.1495104 |
| Abstract |
| CeO2 nanoparticles were dispersed on hexagonal boron nitride (hBN) supports by a
rotary chemical vapor deposition method using Ce(DPM)4 as a precursor at 600oC,
and extra oxygen was introduced to assist the decomposition and oxidation of the
precursor. A significant composition and structure dependent nature was observed
on the oxidation supply rate by eliminating the organic molecules and fragments and
assisting the decomposition of the Ce(DPM)4 precursor. The CeO2 nanoparticles were
10-15 nm in diameter, with the measured spacings of the lattice fringes as 0.31 and
0.27 nm, corresponding to (111) and (200) plane, respectively, which are in agreement
with the standard data (JCPDS: 34-0394). In addition, with the oxidative decomposition
of precursor Ce(DPM)4, CeO2 nanoparticles were produced and then coated on the
ceramic surface through the CVD method, presenting the preferred orientation. The
deposition mechanism was also discussed.
[Keywords: CeO2/hBN, Nanopowders, Chemical vapor deposition, Oxygen supply rate,
Decomposition, Coating mechanism] |
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