Ceramic wheel film forming method

For some thin ceramic parts, their thickness is generally below 1mm, so dry pressing forming cannot meet this requirement and rolling forming method is widely used. During the rolling forming of powder, there is generally no or very little binder added to the powder, and the powder particles undergo plastic deformation under rolling pressure. This mainly relies on the mechanical interlocking effect between powder particles to form a strip blank with a certain shape and achieve a certain density and strength. Therefore, rolling forming is applied to most metals or gold. However, for those infertile powders (such as advanced ceramic powders) and metal or alloy powders with poor rolling performance that are difficult to form using conventional rolling, the preparation of thin strip materials requires the use of rolling film forming technology.

The so-called 'ough rolling' refers to the process of mixing prepared ceramic powder with a quantitative amount of organic binder and solvent, and then forming a membrane through rough and fine rolling before punching and forming. The main characteristics of rolling film forming are as follows:

(1) It is suitable for forming extremely thin slice Electroceramics components, such as transistor base, capacitor, thick film circuit substrate and other advanced ceramic products.

(2) The thickness of the parts is uniform and dense, with less gas and high production efficiency, which is suitable for batch production.

(3) The billet is only compacted in the thickness and length directions, and lacks sufficient pressure in the width direction, which leads to inconsistent shrinkage of the billet during firing, resulting in defects such as cracking and deformation of the workpiece.

(4) There are a lot of excess leftover materials in the punching process, which can be recycled, but it is inevitable to waste them.

Due to the fact that liquid slurry does not need to be formed during film rolling, the complex ceramic suspension preparation process is avoided. Especially in multi-component material systems, it is extremely easy to obtain high-quality ceramic flakes.

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