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Method for preparing ferric acetylacetonate-containing silicon carbonitride ceramic by precursor conversion method
The invention relates to a method for preparing ferric acetylacetonate-containing silicon carbonitride ceramic by a precursor conversion method. The method comprises the following steps: (1) uniformly mixing polysilazane, alpha-methacrylic acid and dicumyl peroxide to obtain mixed solution; (2) solidifying the mixed solution; (3) crushing and ball-milling the solidified material; (4) uniformly mixing the powder and ferric acetylacetonate; (5) prepressing and shaping the uniformly mixed powder to obtain a green body; (6) pyrolyzing/sintering the green body at a temperature of 1000-1400 DEG C, and insulating to obtain the ferric acetylacetonate-containing silicon carbonitride ceramic. The material obtained by the method disclosed by the invention is good in high-temperature performance, and the introduced ferric acetylacetonate increases the apparent porosity of SiCN ceramic, reduces the volume density of the SiCN ceramic, remarkably improves the microwave absorption performance of the SiCN ceramic, and increases the electromagnetic wave attenuation coefficient.
Method for preparing ferric acetylacetonate-containing silicon carbonitride ceramic by precursor conversion method
The invention relates to a method for preparing ferric acetylacetonate-containing silicon carbonitride ceramic by a precursor conversion method. The method comprises the following steps: (1) uniformly mixing polysilazane, alpha-methacrylic acid and dicumyl peroxide to obtain mixed solution; (2) solidifying the mixed solution; (3) crushing and ball-milling the solidified material; (4) uniformly mixing the powder and ferric acetylacetonate; (5) prepressing and shaping the uniformly mixed powder to obtain a green body; (6) pyrolyzing/sintering the green body at a temperature of 1000-1400 DEG C, and insulating to obtain the ferric acetylacetonate-containing silicon carbonitride ceramic. The material obtained by the method disclosed by the invention is good in high-temperature performance, and the introduced ferric acetylacetonate increases the apparent porosity of SiCN ceramic, reduces the volume density of the SiCN ceramic, remarkably improves the microwave absorption performance of the SiCN ceramic, and increases the electromagnetic wave attenuation coefficient.
Method for preparing ferric acetylacetonate-containing silicon carbonitride ceramic by precursor conversion method
GONG HONGYU (Autor:in) / FENG YURUN (Autor:in) / ZHANG YUJUN (Autor:in) / WANG XIANLI (Autor:in) / GUO XUE (Autor:in) / ZHAO YUJUN (Autor:in)
30.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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