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Preparation of Ultrafine Zirconia Suspension for Gelcasting

Jia‐Lin Sun

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Abstract

Properties and preparation of ultrafine ZrO2(d0.5=0.199μm)suspension in gelcasting were investigated.It is proved that A-type dispersant is suitable for the suspension and the amount of it is 2%-2.5% of ZrO2.pH value of suspension should range from 10 to 11.Milling time of slurry is about 12h.ZrO2 suspension was prepared with 54% solid loading,viscosity of which was 0.952 Pa·s and it could be used in gelcasting process.The bending strength of green body was 50.09 MPa and the sintered ZrO2 ceramics with fine crystal compact structure was produced at 1550℃ holding 2h.

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What this paper is about

Properties and preparation of ultrafine ZrO2(d0.5=0.199μm)suspension in gelcasting were investigated.It is proved that A-type dispersant is suitable for the suspension and the amount of it is 2%-2.5% of ZrO2.pH value of suspension should range from 10 to 11.Milling time of slurry is about 12h.ZrO2 suspension was prepared with 54% solid loading,viscosity of which was 0.952 Pa·s and it could be used in gelcasting process.The bending strength of green body was 50.09 MPa and the sintered ZrO2 ceramics with fine crystal compact structure was produced at 1550℃ holding 2h.

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Available abstract

Properties and preparation of ultrafine ZrO2(d0.5=0.199μm)suspension in gelcasting were investigated.It is proved that A-type dispersant is suitable for the suspension and the amount of it is 2%-2.5% of ZrO2.pH value of suspension should range from 10 to 11.Milling time of slurry is about 12h.ZrO2 suspension was prepared with 54% solid loading,viscosity of which was 0.952 Pa·s and it could be used in gelcasting process.The bending strength of green body was 50.09 MPa and the sintered ZrO2 ceramics with fine crystal compact structure was produced at 1550℃ holding 2h.

Key concepts: Materials science, Suspension (topology), Dispersant, Slurry, Cubic zirconia, Green body, Composite material, Ceramic

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