Method for preparing aluminum oxide ceramics with excellent wear-resisting property
A technology of alumina ceramics and ball milling, which is applied in the field of alumina ceramics, can solve problems such as failure to find satisfaction, and achieve the effects of excellent wear resistance, simple process, and low sintering temperature
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[0022] Example 1 :
[0023] (1) The mass percentage content of each component of the raw material is: α-Al 2 o 3 Powder 93.5%, yttrium hydroxide 1.5%, kaolin 1.66%, calcium oxide 1.67% and magnesium oxide 1.67%.
[0024] (2) Put the raw materials prepared in step (1) into a ball milling device and mill them for 42 hours.
[0025] (3) Dry the slurry obtained in step (2) at 110°C for 8 hours.
[0026] (4) The powder obtained in step (3) is molded by isostatic pressing (100MP), and kept under pressure for 10 minutes to make a spherical green body.
[0027] (5) Sinter the spherical green body obtained in step (4) at 1450°C in a high-temperature resistance furnace. The sintering is carried out in an air atmosphere, kept for 60 minutes, and cooled to room temperature to obtain the required wear-resistant alumina ceramic material. Test the wear rate of the sample is 0.000552%h -1 .
Example Embodiment
[0028] Example 2 :
[0029] (1) The mass percentage content of each component of the raw material is: α-Al 2 o 3 Powder 96%, Yttrium Hydroxide 1.0%, Kaolin 1.0%, Calcium Carbonate 1.0% and Basic Magnesium Carbonate 1.0%.
[0030] (2) Put the raw materials prepared in step (1) into a ball milling device and mill them for 42 hours.
[0031] (3) Dry the slurry obtained in step (2) at 110°C for 8 hours.
[0032] (4) The powder obtained in step (3) is molded by isostatic pressing (100MP), and kept under pressure for 10 minutes to make a spherical green body.
[0033] (5) Sinter the spherical green body obtained in step (4) at 1480°C in a high-temperature resistance furnace. The sintering is carried out in an air atmosphere, kept for 100 minutes, and cooled to room temperature to obtain the required wear-resistant alumina ceramic material. Test the wear rate of the sample is 0.000447%h -1 .
Example Embodiment
[0034] Example 3 :
[0035] (1) The mass percentage content of each component of the raw material is: α-Al 2 o 3 Powder 95%, yttrium oxide 1.0%, kaolin 1.5%, calcium carbonate 1.5% and dolomite 1.0%,.
[0036] (2) Put the raw materials prepared in step (1) into a ball milling device and mill them for 42 hours.
[0037] (3) Dry the slurry obtained in step (2) at 110°C for 8 hours.
[0038] (4) The powder obtained in step (3) is molded by isostatic pressing (100MP), and kept under pressure for 10 minutes to make a spherical green body.
[0039] (5) Sinter the spherical green body obtained in step (4) at 1430°C in a high-temperature resistance furnace. The sintering is carried out in an air atmosphere, kept for 120 minutes, and cooled to room temperature to obtain the required wear-resistant alumina ceramic material. Test the wear rate of the sample is 0.000489%h -1 .
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