Medical aluminum oxide ceramic compound material and preparation method thereof

[0020] A medical alumina ceramic composite material and a preparation method thereof, comprising the following steps: uniformly mixing 99% vol alumina ceramics and 0.15% vol graphene, pressing into a green body, and cooling the green body after sintering at 1550°C.

[0021] The particle size of the alumina ceramic is 150nm.

[0022] The graphene has a thickness of 8nm and a diameter of 20um.

[0023] The mixing is carried out using a ball mill at a speed of 300 r / min for 3 hours.

[0024] The pressing is carried out by a cold isostatic press with a pressure of 300 MPa.

[0025] The relative density of the green body is 55%.

[0026] The sintering time is 3h.

[0027] The temperature was raised to the sintering temperature at 5°C / min.

[0028] During the sintering, a nitrogen-hydrogen mixed gas is introduced, and the nitrogen-hydrogen mixed gas contains 95% vol nitrogen and 5% vol hydrogen.

[0030] A medical alumina ceramic composite material and a preparation method thereof, comprising the following steps: uniformly mixing 99.75% vol alumina ceramics and 2% vol graphene, pressing into a green body, and cooling the green body after sintering at 1600°C.

[0031] The particle size of the alumina ceramic is 100 nm.

[0032] The graphene has a thickness of 6nm and a diameter of 15um.

[0033] The mixing is carried out using a ball mill at a speed of 200 r / min for 2 hours.

[0034] The pressing is carried out by a cold isostatic press with a pressure of 200 MPa.

[0035] The relative density of the green body is 45%.

[0036] The sintering time is 2h.

[0037] The temperature was raised to the sintering temperature at 5°C / min.

[0038] During the sintering, an argon-hydrogen mixed gas is introduced, and the argon-hydrogen mixed gas contains 95% vol of argon and 5% vol of hydrogen.

[0039] In summary, it can be seen that the medical alumina ceramic composite mate