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Preparation method for submicron zirconia-toughened aluminium oxide powder and ceramic thereof
The invention discloses a preparation method for a submicron zirconia-toughened aluminium oxide powder and a ceramic thereof. The preparation method is characterized by comprising the following steps: (1) mixing industrial aluminium hydroxide, zirconium oxychloride, a composite mineralizer and a stabilizer for 1-2 hours; (2) heating to 1350-1500 DEG C at a heating speed of 3-5 DEG C and carrying out a calcining treatment for 2-8 hours to obtain ZTA powder; (3) mixing the ZTA powder, a dispersant and water and carrying out wet-method ball-milling, and carrying out spray-drying, thereby obtaining a submicron ZTA powder with the powder grain size D50 of 0.2-0.8mum. The obtained submicron ZTA powder is shaped into a ceramic biscuit, and the ceramic biscuit is sintered at a high temperature of 1500-1650 DEG C for 2-5 hours, so as to obtain a submicron ZTA ceramic with the relative density of 97-99%. The method is low in cost, simple in technique process, and convenient for realization of industrial production; the powder is small in raw crystalline grain size, narrow in distribution, and capable of being applied to the field of high-technology ceramics.
Preparation method for submicron zirconia-toughened aluminium oxide powder and ceramic thereof
The invention discloses a preparation method for a submicron zirconia-toughened aluminium oxide powder and a ceramic thereof. The preparation method is characterized by comprising the following steps: (1) mixing industrial aluminium hydroxide, zirconium oxychloride, a composite mineralizer and a stabilizer for 1-2 hours; (2) heating to 1350-1500 DEG C at a heating speed of 3-5 DEG C and carrying out a calcining treatment for 2-8 hours to obtain ZTA powder; (3) mixing the ZTA powder, a dispersant and water and carrying out wet-method ball-milling, and carrying out spray-drying, thereby obtaining a submicron ZTA powder with the powder grain size D50 of 0.2-0.8mum. The obtained submicron ZTA powder is shaped into a ceramic biscuit, and the ceramic biscuit is sintered at a high temperature of 1500-1650 DEG C for 2-5 hours, so as to obtain a submicron ZTA ceramic with the relative density of 97-99%. The method is low in cost, simple in technique process, and convenient for realization of industrial production; the powder is small in raw crystalline grain size, narrow in distribution, and capable of being applied to the field of high-technology ceramics.
Preparation method for submicron zirconia-toughened aluminium oxide powder and ceramic thereof
XU JIE (Autor:in) / CAO YULIANG (Autor:in) / XU HUA (Autor:in)
16.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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