How to check the quality of zirconia?

As a special industrial ceramic, zirconia ceramics have been used in various fields. The feedback of its quality and performance is also very good. Before the application of zirconia ceramics, the first thing to do is to check its performance quality, to ensure that all aspects can meet the standards, in a qualified state into use. So, how to check the quality of zirconia ceramics? Below, sacred porcelain Xiaobian to lead you to find out! On the quality inspection of zirconia ceramics, the inspection content includes substrate dielectric constant, material, steel ball drop, pencil hardness, substrate, four-point bending strength, etc. The test methods of different parameters are different, and there should also be a standard basis as a reference.

First of all, as qualified zirconia ceramics, its substrate dielectric constant should be greater than 30; The steel ball drop is to use 20g steel ball at a height of 50cm to fall to the center of the ceramic with a diameter of 10mm. The ceramic is placed on the rigid flat marble. After three times of the same operation, no cracks appear in the ceramic sheet. Secondly, the standard specifies that the pencil hardness of zirconia ceramics should be more than 8H; The specific test method is 750gf pressure, the included Angle between the pencil lead and the surface to be measured is 45°, in the position to be measured 5 strokes, each stroke length of 10mm, do not allow the surface indentation.

At the same time, the cutting edge of the zirconia ceramic substrate is required to be sharp, the depth of the collapse is less than 0.03mm, and the surface should not appear pits, impurities, cracks, scratches and other defects. In addition, its four-point bending strength ≥500MPa; Its test method is, the upper span: 20mm, the lower span: 40mm, the pressure rod diameter is ￠6, the pressure speed of 10mm/min, the pressure until the oxide ceramic rupture.