A kind of low cost and toxicity ceramic precursor with zirconium (PZC) used for impregnation was successfully synthesized with phenol

paraformaldehyde (PA)

ZrOCl28H2O

acetylacetone (Hacac) and H2O2 as raw materials.The precursor was air stable and can be diluted in ethanol to any expected viscosity.The composition

structure

viscosity and pyrolysis process of the precursor were analyzed by X-ray diffractometer (XRD)

X-ray photoelectron spectroscopy (XPS)

nuclear magnetic resonance (NMR)

Fourier transform infrared spectra (FTIR)

the cone and plate rheometer and thermogravimetric analyser-differential scanning calorimetry (TG-DSC).The results showed that incorporation of Zr on to the polymer backbone was successfully done

using Hacac as complexing agent and ethanol as solvent

and the obtained precursor might be ZrO and ZrOC chain polymer with acetylacetone and hydroxymethyl phenol as ligands.During reaction

the coordination compound [Zr] prepared by the coordination reaction between ZrOCl28H2O and acetylacetone (Hacac) was the main reactive group.And PZC was prepared by the coordination reaction of [Zr] and the hydroxymethyl phenol which was synthesized by reaction between phenol and formaldehyde.Results indicated that the precursor showed long temperature range of 40~80℃ and low viscosity of 50~800 mPas

which was suitable for impregnation.The ceramic yield ratio of the precursor was 48% at 1400℃

pyrolysis products were ZrO2 and ZrC

while initial formation temperature of ZrC was higher than 1200℃

and the precursor transformed into ZrC completely at 2000℃.Thus

it is a kind of ceramic precursor suitable for infiltration and pyrolysis to obtain ZrC modified carbon/carbon composites.