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Method and device for preparing zirconia sizing nozzle with ZrO2-Al2O3 composite powder
The invention discloses a method and a device for preparing a zirconia sizing nozzle with ZrO2-Al2O3 composite powder. According to the method, an additive, a binding agent and a powder material are subjected to spray granulation, such that a particulate matter is obtained; the particulate matter is separated, such that a blank is obtained; the blank is fired under a temperature of 1700-1710 DEG C, such that the zirconia sizing nozzle is obtained. The powder material comprises partially stabilized zirconia, monoclinic zirconia and ZrO2-Al2O3 composite powder with a dosage ratio of (40-50):(50-60):(2-4). The binding agent is zirconia gel. The blank used in ceramic zirconia sizing nozzle compression molding is prepared with a suspended cyclic granulation process. The blank is subjected to aging, dehydration and molding, and is dried for 24h under a temperature of 105+/-5 DEG C. the ceramic zirconia sizing nozzle is obtained after firing. Compared with that obtained with a common humidifying granulation process, the finished product of the sizing nozzle has a bulk density improved by 3-5%, a porosity reduced by 75-80%, and a service life of more than 40h.
Method and device for preparing zirconia sizing nozzle with ZrO2-Al2O3 composite powder
The invention discloses a method and a device for preparing a zirconia sizing nozzle with ZrO2-Al2O3 composite powder. According to the method, an additive, a binding agent and a powder material are subjected to spray granulation, such that a particulate matter is obtained; the particulate matter is separated, such that a blank is obtained; the blank is fired under a temperature of 1700-1710 DEG C, such that the zirconia sizing nozzle is obtained. The powder material comprises partially stabilized zirconia, monoclinic zirconia and ZrO2-Al2O3 composite powder with a dosage ratio of (40-50):(50-60):(2-4). The binding agent is zirconia gel. The blank used in ceramic zirconia sizing nozzle compression molding is prepared with a suspended cyclic granulation process. The blank is subjected to aging, dehydration and molding, and is dried for 24h under a temperature of 105+/-5 DEG C. the ceramic zirconia sizing nozzle is obtained after firing. Compared with that obtained with a common humidifying granulation process, the finished product of the sizing nozzle has a bulk density improved by 3-5%, a porosity reduced by 75-80%, and a service life of more than 40h.
Method and device for preparing zirconia sizing nozzle with ZrO2-Al2O3 composite powder
XUE QUNHU (Autor:in) / ZHAO LIANG (Autor:in) / ZHANG HAN (Autor:in) / ZHANG HUI (Autor:in)
26.08.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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