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Zirconium oxide monodisperse active spinel powder and preparation method thereof
The invention specifically relates to zirconium oxide monodisperse active spinel powder and a preparation method thereof. According to the technical scheme, the method comprises the following steps: firstly, co-grinding 50-75wt% of aluminum oxide rawbmaterial and 25-50wt% of magnesium oxide raw material; secondly, adding an organic binding agent and zirconium-containing liquid to a co-ground material, and mixing; thirdly, ageing the mixed material, and forming a green body in a mold pressing manner; fourthly, naturally drying the green body at a room temperature for 12-24 hours, drying at 150-180 DEG C for 20-24 hours and calcining at 1300-1350 DEG C for 6-8 hours; and finally, crushing calcined material, carrying out coarse grinding and fine grinding, carrying out air milling on superfine powder, so as to obtain the zirconium oxide monodisperse active spinel powder. the zirconium oxide monodisperse active spinel powder prepared by the method has relatively high low-temperature sintering activity and nano-zirconia monodisperse characteristic; the sintering temperature of corundum-spinel castable for a bottom-blow argon air brick can be effectively lowered; the compactness, the corrosion resistance and the thermal shock resistance of the corundum-spinel castable are improved; and the service life and the reliability of the bottom-blow argon air brick are enhanced.
Zirconium oxide monodisperse active spinel powder and preparation method thereof
The invention specifically relates to zirconium oxide monodisperse active spinel powder and a preparation method thereof. According to the technical scheme, the method comprises the following steps: firstly, co-grinding 50-75wt% of aluminum oxide rawbmaterial and 25-50wt% of magnesium oxide raw material; secondly, adding an organic binding agent and zirconium-containing liquid to a co-ground material, and mixing; thirdly, ageing the mixed material, and forming a green body in a mold pressing manner; fourthly, naturally drying the green body at a room temperature for 12-24 hours, drying at 150-180 DEG C for 20-24 hours and calcining at 1300-1350 DEG C for 6-8 hours; and finally, crushing calcined material, carrying out coarse grinding and fine grinding, carrying out air milling on superfine powder, so as to obtain the zirconium oxide monodisperse active spinel powder. the zirconium oxide monodisperse active spinel powder prepared by the method has relatively high low-temperature sintering activity and nano-zirconia monodisperse characteristic; the sintering temperature of corundum-spinel castable for a bottom-blow argon air brick can be effectively lowered; the compactness, the corrosion resistance and the thermal shock resistance of the corundum-spinel castable are improved; and the service life and the reliability of the bottom-blow argon air brick are enhanced.
Zirconium oxide monodisperse active spinel powder and preparation method thereof
MA JUNQIANG (Autor:in)
24.06.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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