Influencing factors of alumina ceramic tube

14-05-2021

Influencing factors of alumina ceramic tube

Alumina ceramic

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.


The influence of raw material powder

The important raw material of alumina ceramic tube is high-purity alumina powder. Its performance and content have a great influence on alumina ceramic tube. It is inevitable to introduce impurities during the preparation of ceramic powder, and the organic impurities will be burned off during the sintering process, and irregular pores will be formed during the densification process;

Inorganic impurities may react with the ceramic powder in the high temperature stage or remain in the matrix to form microcracks. These microstructure defects caused by impurities have a significant impact on the densification of the alumina ceramic tube.

The particle size of the raw material powder also has a great influence on the performance of the product. Only when the raw material is sufficiently fine, the sintered product can form a microcrystalline structure, which makes it have good wear resistance.

Therefore, the use of high-purity, fine-grained alumina powder is an important prerequisite for the preparation of alumina ceramic tubes with excellent performance.

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