Mechanical hardness advantages and processing technology of alumina ceramic processing

Special processing techniques are used to produce alumina ceramics. Today, Kezhong Ceramic Factory will introduce the structural advantages and special processing techniques of this ceramic.

What can you first think of when it comes to alumina ceramics? I firmly believe that many users will remember its main purpose, and everyone can choose different types of products based on different regulations. At present, alumina ceramics have already been widely used in many manufacturing industries and companies, such as the coal industry and mechanical industry, where they are used in some mechanical equipment with high wear and tear in coal and material conveying systems.

When constructing ceramic parts with aluminum oxide, it is generally necessary to add an appropriate amount of additives, such as borate, chloride, high-purity nano technology Al2O3, etc. Additives can reduce the pre firing temperature, promote crystal transformation, and remove residues such as Na2O. Boric acid salts are effective in removing alkali, but their heat resistance, dielectric strength, and impact toughness are reduced; Fluoride can promote crystal transformation, has a high shrinkage rate, and good activity. Due to the presence of foreign impurities, impurity ions will be introduced. High purity nano alumina (UG-

L100G/UG-L100K) has the advantages of low sintering temperature, good whiteness, high purity, and strong resistance to falling.

Alumina is a ionic crystal with stable structure. When used at high frequency, high voltage, and high temperature, its insulation is still very good, and its loss and dielectric constant are not significant. Widely used in the electronics industry, for solid extrusion of circuit board sockets, casings, porcelain frames, micro glass windows, missile radar antenna protective covers, etc.

The characteristics of alumina ceramics are that they are high-performance structural ceramics with high high-temperature strength, oxidation resistance, wear resistance, corrosion resistance, easy sintering, and low price. Therefore, they have been widely used. However, the mechanical strength and fracture toughness of alumina ceramics can no longer meet the requirements of some fields. Structural ceramics with higher strength and better wear resistance have attracted much attention.

There are many preparation methods for toughening alumina ceramic powders with alumina raw materials. A simpler method is to mix alumina and Zr0 in proportion and then perform wet or dry grinding. However, the distribution of Zr02 in the powder prepared by this method is uneven, which will lead to uneven microstructure of the product ceramics.

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