Liquid phase pretreatment method for gelcasting ceramic blank before binder burning out
A technology of gel injection molding and ceramic body, which is applied in the field of ceramic molding, can solve the problems of low yield and difficulty, and achieve the effect of low cost and simple process
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Embodiment 1
[0020] Commercially available α-Al 2 o 3 As a raw material, the average particle size of the particles is 3 μm. A cylindrical blank with a diameter of 6.4 cm and a height of 5.9 cm was prepared by gel injection molding. Make a 20wt% solution with ammonium persulfate, immerse the green body in 200ml of the solution, and treat it at 60°C for 10 hours. After the treatment, take it out, dry it in the shade at room temperature 25°C for 3 days, dry it at 80°C for 3 days, and then degumming at 150°C for 50 hours to get a complete green body without cracks.
Embodiment 2
[0022] Commercially available ZrO 2 As a raw material, the average particle size of the particles is 1.5 μm, and a cylindrical green body with a diameter of 6.4 cm and a height of 5.9 cm is prepared by gel injection molding. Make a 0.8wt% solution with potassium persulfate, immerse the green body in 200ml of the solution, let stand at 80°C for 10 hours, and change the solution every 1 hour therebetween. After the treatment, take it out and dry it in the shade for 3 days, then dry it at 80°C for 3 days, and then degumming at 600°C for 8 hours to get a complete green body without cracks.
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