A composite additive for improving the properties of zirconia powder ceramics

Abstract

The invention relates to a device for adding composite additives for improving the properties of zirconia powder ceramics. The device for adding at least includes a modification area and a refinement area for supplying powdery raw materials to the modification area. The device for adding is structured as a multi-layer shell body structure, the adding device can make intermittent communication between the refinement area and the modification area through the relative movement between its at least two layers of shells, and in this intermittent communication mode, a The additive retention chamber between them, so that the adding device can use the additive retention chamber formed in the intermittent communication mode to make the first powdery raw material located in the refinement area be crushed before it is completely refined to reach the target particle size. Guided into the modification area, and the vortex motion promoted by the intermittent communication mode can be used to gradually refine the first powdery raw material located in the modification area to the target particle size and blend with the second powdery raw material and at least partially contacting and merging.

Description

technical field [0001] The invention relates to the technical field of modification of zirconia powder ceramics, in particular to a composite additive for improving the properties of zirconia powder ceramics. Background technique [0002] Ceramic Injection Molding technology Ceramic Injection Molding, referred to as CIM technology, is similar to the metal injection molding technology (Metal injection Molding, referred to as MIM technology) developed in the 1970s. Both CIM technology and MIM technology belong to powder injection molding technology (Powder Injection Molding Technology). Molding, the main branch of PIM technology), is developed on the basis of relatively mature polymer injection molding technology. Because CIM technology can produce products with complex shapes, high dimensional accuracy, less machining, smooth surface, suitable for mass production, and low cost, it has become the fastest growing and most widely used precision manufacturing technology for ceram...

AI Technical Summary

Problems solved by technology

[0008] In view of the deficiencies in the prior art, such as the problem that the agglomeration of additive particles easily leads to its poor dispersion effect, the inventors of the present invention have practiced and compared a large number of related experiments, and proved that the existing method of adding a sufficient amount of dispersant under mechanical mixing reduces the particle size. The conventional solution of viscosity will inevitably greatly reduce the binding modification effect between additive particles and zirconia ceramic particles, and it also proves that improving feeding equipment or grinding equipment will bring a lot of cost and adverse effects of uncontrollable factors

Images