Grinding and cooling shaping methods for zirconia ceramics

Zirconia ceramic polishing method: Zirconia ceramic has high high-temperature structural strength and negative resistance temperature coefficient, so it is necessary to polish the material of the product under certain circumstances. The specific methods are as follows:

(1) Mechanical polishing of zirconia ceramics: In order to improve work efficiency during large-scale construction of zirconia ceramics, mechanical polishing methods such as electric polishing machines (disc type, vibration type) can be used.

(2) Dry polishing of zirconia ceramics: sandpaper is used for polishing. Suitable for polishing hard and brittle paint, the disadvantage of polishing zirconia ceramic materials is that a lot of dust will be generated during the operation, which affects environmental hygiene.

(3) Wet polishing of zirconia ceramics: Use sandpaper dipped in water or soapy water to polish. Water grinding can reduce grinding marks, improve the smoothness of coatings, and save sandpaper and labor. However, attention should be paid to spraying the lower layer of paint after water grinding. Firstly, it is necessary to wait for the water grinding layer to completely dry before applying the lower layer of paint, otherwise the paint layer can easily turn white. Additionally, substrates with strong water absorption are not suitable for water grinding.

Cooling and shaping of zirconia ceramic structural components

(1) Zirconia ceramic vacuum cooling and shaping: The method of using vacuum outside the pipe to adsorb the outer surface of the pipe on the inner wall of the shaping sleeve and cooling to determine the outer diameter size is used. This method is particularly suitable for the extrusion method of ultra-high molecular weight polyethylene ceramic needle gauge structural components.

(2) Zirconia ceramic internal pressure cooling and shaping: It is a method of using compressed air inside the zirconia ceramic structural component, and adding a cooling and shaping sleeve to the pipe, so that the outer surface of the pipe is attached to the shaping sleeve and quickly cooled and hardened to determine the outer size. The pipe is evenly drawn out through a traction device.

(3) Zirconia ceramic sizing port sizing (ejection method) cooling shaping: This method does not require a traction device and directly ejects the zirconia ceramic structural component into shape. The characteristics of the ejection method head structure are: the straight part of the core mold is about 10-50mm longer than the mouth mold, and the screw thrust pushes the pipe out of the head and directly into the cooling water tank. The outer surface of the pipe cools and hardens, and the inner surface is covered on the core rod and cannot shrink inward to shape.

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