Sintering is one of the processes in the production of alumina ceramics. So what changes will occur in alumina ceramics before sintering, during sintering, and after sintering?

(1) The level of technical equipment will be rapidly improved: the development of computer technology and digital control technology has promoted the technological progress and rapid development of the advanced ceramic material industry, such as automatic control of continuous sintering kilns, high-power and large-capacity grinding equipment, and high-performance milling Advanced complete sets of equipment such as granulation equipment and other net pressure forming equipment have beneficially promoted the improvement of the overall level of the industry, and at the same time, the production efficiency and product quality have also been significantly improved.

In order to improve the accuracy of the product, some alumina ceramic materials need to be further processed after the sintering process is completed, so as to achieve a higher surface finish. But alumina ceramics is not an ordinary material after all, how can its finishing treatment be better?

Alumina ceramic tube sintering is a key stage of ceramic preparation, and the sintering atmosphere has a great influence on the preparation of ceramic materials. Too high sintering temperature or too long holding time will promote crystal growth, so that the fine raw materials will develop into coarse grains at high temperature, and the amount of liquid phase will increase. This will not only decrease the strength, but also weaken the wear resistance. Of course, if the temperature is too low, the sintered body will not be dense, and the wear resistance of the product will not be good.

Production practice and a large number of studies show that: low porosity, high density alumina ceramics have excellent structural properties. High density means that the crystal grains in the ceramic body are tightly arranged, and it is not easy to form destructive breakthrough points when subjected to external loads or corrosive substances.

In order to obtain alumina ceramic materials with high wear resistance, not only should it be considered to have high density, flexural and compressive strength, but also to increase its hardness and fracture toughness, and these properties are in line with the obvious characteristics of alumina ceramics. The microstructure (closed porosity, grain size, distribution of glass phase, etc.) and its wear mechanism are closely related.

Unlocking the Potential of Alumina Ceramic Tubes Whether you're in the automotive, chemical, or aerospace industry, alumina ceramic tubes are indispensable components. Here are a few applications where these tubes excel: