Zirconia ceramic laser processing methods and characteristics

Release time：2024-09-12click：1

Zirconium oxide ceramics (raw materials: non-metallic minerals) Laser processing is the use of uniform laser beams with high energy density (unit: g/cm3 or kg/m3) (108-1O10W/cm2) (LASER), as a heat source, generates instantaneous high temperature at local points on the surface of the processed ceramic material (Material), and the local points melt or vaporize to remove the material.

Zirconium oxideWhite, yellow or gray when containing impurities, generally containing HfO2 and difficult to separate. Pure ZrO2 has three crystal states under normal pressure. The production of zirconia ceramics requires the preparation of powders with high purity, good dispersion properties, ultra-fine particles, and narrow particle size distribution. There are many methods for preparing ultra-fine zirconia powder. The main methods for purifying zirconia include chlorination and thermal decomposition, alkali metal Oxidative decomposition method, lime fusion method, plasma arc method, precipitation method, colloid method, hydrolysis method, spray pyrolysis method, etc. Laser processing is a non-contact, friction-free processing technology that does not require molds during the processing (title: the mother of industry). By controlling the focus position of the laser beam on the surface of the ceramic material, it can process three-dimensional complex-shaped materials. Ceramic laser processing is suitable for micro-drilling, micro-segmentation, and production of microstructures on organic and inorganic materials such as ceramics. Currently, it can process diameters of 4-5uM, micropores with a depth-to-diameter ratio of more than 10. The production of zirconia ceramics requires the preparation of powders with high purity, good dispersion properties, ultra-fine particles, and narrow particle size distribution. There are many methods for preparing ultra-fine zirconia powder. The main methods for purifying zirconia include chlorination and thermal decomposition, and alkali metal oxidation. Decomposition method, lime melting method, plasma arc method, precipitation method, colloid method, hydrolysis method, spray pyrolysis method, etc. Usually the laser sources used are CO2 and Nd:YAG lasers.

Characteristics of laser processing of zirconia ceramics:

1. Since laser (LASER) processing focuses laser light with high parallelism and high energy density (unit: g/cm3 or kg/m3) ontoThe surface of the workpiece is thermally processed, so the diameter of the laser spot can theoretically be less than 1 μm, enabling very fine processing h

2. Since the power of laser (LASER) processing (referring to the amount of work done by an object in unit time) density (unit: g/cm3 or kg/m3) is very high, it can reach more than 1u/cm-, and It can be done higher, so materials that are difficult to process with previous methods can be processed with laser

3. Because the workpiece can be separated and machinedThe machine performs non-contact processing at an appropriate distance, so the material will not be infected, and the processing deformation and thermal deformation are also very small;

4. By selecting appropriate processing conditions, the same device can be used for drilling and welding;

5. Can be processed through transparent bodies,

6. Compared with electron beam processing machines, there is no need for vacuum or X-ray protection, so the device is simple and the working performance is good!