Ceramic products are a superb craftsmanship and have been used in many places in our lives. It belongs to high-tech products that need to pass layers of inspection before they can enter our eyes. The small series of the decoration house below comes to everyone to talk about how to make silicon carbide ceramics , and what are the advantages of such products. Let more people around us no longer be familiar with such products.
First, how to make silicon carbide ceramics?
1. Ceramic products are relatively fragile, so we chose a more advanced process to improve this shortcoming. Studies have shown that the use of B and C as additives alone does not contribute to the full density of SiC ceramics. The high density of SiC ceramics can be achieved only when B and C are added at the same time. For dense sintering of SiC, the specific surface area of the SiC powder should be above 10 m 2 /g, and the oxygen content should be as low as possible.
2. We are the products that have been obtained by hot pressing sintering. So the comparison is resistant. In the mid-1950s, researchers used Al2O3 as an additive, and researchers also used B4C, B or B and C, Al2O3 and C, Al2O3 and Y2O3, Be, B4C and C as additives, and they were also obtained by hot press sintering. A dense SiC ceramic.
3. We have to go through a layered process to achieve hot isostatic pressing. With the continuous advent of technology products, in order to further improve the mechanical properties of SiC ceramics, the researchers carried out research work on the hot isostatic pressing process of SiC ceramics. A high-density SiC sintered body was obtained at 1900 °C. Further, by this process, dense sintering of the additive-free SiC ceramic is successfully achieved at 2000 ° C and a pressure of 138 MPa.
Second, what are the advantages of silicon carbide ceramics?
1. Our advantages are reflected in the higher limit speed and no special effort: ceramic is lighter than steel and suitable for large-scale products. It will reduce the running centrifugal force and increase the limit speed with the same accuracy. High-precision applications: Ceramics have higher hardness and Young's modulus than steel. Under the same load, the mechanical deformation is smaller, which can be applied to more precise applications.
2, our products can be durable, and will not often fail. The maximum comparable steel bearing is extended by 5 times, the centrifugal force of the bearing is reduced, the raceway load is reduced, and since the ceramic friction coefficient is smaller than that of the steel, the operating temperature rise can be reduced, the wear loss can be reduced, and the life of the raceway can be prolonged.
3, our high temperature test has reached the extreme inside of similar products, it is worthy of everyone's affirmation. Therefore, it can be used in the high temperature field. More suitable for temperature changes: Since the thermal expansion coefficient of ceramics is smaller than that of steel, the clearance of ceramic bearings is less affected by temperature changes than steel bearings, so that it can be used in a wider range of temperature fluctuations.
The above article is about the introduction of how to make silicon carbide ceramics in the small series of the decoration house, and also said a lot of advantages. I hope that when you choose materials, you can also learn from the advantages mentioned in the small series. If you still want to continue to learn more about the renovation information, please continue to pay attention to our decoration home website. We will do better and bring convenience to everyone's life.
