| Synthesis, Characterization and Ceramization of Novel
Polyzirconoxanesal Precursors for ZrC Ceramics |
Jin Jiang,a
Xichao Dong,b
Xiantao Yang,a
Manxuan Zhang,a
Yuenong Liu,a Xingang Luanb
and
Zhaoju Yua, c, *
Pages : 300-307
DOI: 10.1080/0371750X.2025.2599098 |
| Abstract |
| In the present work, a novel ZrC precursor, namely polyzirconoxanesal containing
vinyl groups, was successfully synthesized by a simple one-pot synthesis, with
zirconium n-propoxide (Zr(OC3H7
)4
), methacrylic anhydride and dihydroxy benzene
as starting materials. The obtained single-source-precursor was powdered and
named as ZMD, which shows excellent solubility in solvents such as alcohol,
acetone, N,N-dimethylformamide, tetrahydrofuran, toluene, etc. The ZMD was
characterized by Fourier transform infrared (FTIR) spectroscopy to confirm the
structure units such as Zr-O-C, C=O and C=C. The polymer-to-ceramic transfor-
mation was investigated by thermogravimetric analysis and FTIR. Due to the fact
that the vinyl groups are involved in the cross-linking, the ZMD possesses good
ceramic yield, such as ca. 50 wt% at 1200oC and ca. 40 wt% at 1500oC. The phase
composition and microstructure of obtained ceramics were studied by X-ray
diffraction, elemental analysis and transmission electron microscopy. The results
show that the ZrO2
was first formed and then transformed into ZrC at 1500oC. In
general, the grain size of obtained ZrC powders is below 100 nm, which is
significantly influenced by the in-situ formed free carbon. Based on the simple
synthesis route, excellent solubility and high ceramic yield, the present ZMD has
to be considered as promising precursors for ultrahigh temperature resistance
ZrC, which opens a new window for potential fabrication of ultrahigh temperature
ceramic matrix composites by precursor infiltration pyrolysis process.
[Keywords: ZrC, Polyzirconoxanesal, Ultra-high temperature ceramics, Polymer
derived ceramics, One-pot synthesis] |
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