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Improved alumina ceramic core and preparation method thereof
The invention discloses an improved alumina ceramic core and a preparation method thereof and aims to solve the problems that an existing ceramic core has low firing porosity, low room temperature strength, high shrinkage cofficient, high high-temperature deflection and difficulty in core stripping and cannot be used in a high-temperature environment and later core stripping is difficult. The improved alumina ceramic core is prepared from ceramic slurry and a plasticizer, wherein the ceramic slurry is formed by mixing corundum powder, mullite, quartz powder, activated graphite, magnesium oxide and oleic acid; the plasticizer is formed by mixing paraffin, beewax and polyethylene. The method comprises preparation of the plasticizer, preparation of the ceramic slurry, preparation of a prefabrication material and preparation of the improved alumina ceramic core. The firing shrinkage coefficient of the non-strengthened improved silica ceramic core is 0.58% and is reduced by 2.52%; meanwhile, the high-temperature deflection of the improved alumina ceramic core after high-temperature reinforcement is 0.23 mm and reduced by 6.77 mm.
Improved alumina ceramic core and preparation method thereof
The invention discloses an improved alumina ceramic core and a preparation method thereof and aims to solve the problems that an existing ceramic core has low firing porosity, low room temperature strength, high shrinkage cofficient, high high-temperature deflection and difficulty in core stripping and cannot be used in a high-temperature environment and later core stripping is difficult. The improved alumina ceramic core is prepared from ceramic slurry and a plasticizer, wherein the ceramic slurry is formed by mixing corundum powder, mullite, quartz powder, activated graphite, magnesium oxide and oleic acid; the plasticizer is formed by mixing paraffin, beewax and polyethylene. The method comprises preparation of the plasticizer, preparation of the ceramic slurry, preparation of a prefabrication material and preparation of the improved alumina ceramic core. The firing shrinkage coefficient of the non-strengthened improved silica ceramic core is 0.58% and is reduced by 2.52%; meanwhile, the high-temperature deflection of the improved alumina ceramic core after high-temperature reinforcement is 0.23 mm and reduced by 6.77 mm.
Improved alumina ceramic core and preparation method thereof
XUE XIANG (author) / YIN XUNTONG (author)
2015-07-22
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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