What are the chemical properties of zirconia porcelain pieces?

The chemical properties of zirconia porcelain pieces are mainly reflected in the following aspects:

1, the characteristics of weak acid oxides

Zirconia (ZrO2) is a weakly acidic oxide, which means that it shows some acidity in chemical reactions, but the acidity is relatively weak.

2, the stability of acid and base solution

Zirconia ceramics show sufficient stability to alkali solutions and many acidic solutions (except hot concentrated H2SO4, HF and H3PO4). This stability allows zirconia ceramics to be used in a wide range of chemical environments without being damaged by acid-base corrosion.

3. Reactions with other compounds

At high temperatures, zirconia ceramics react with strong alkali to form corresponding zirconates. This reaction is particularly significant in high temperature environments, and it is necessary to avoid direct contact with strong bases when using.

Under high temperature (above 2220 ° C) conditions in a vacuum, zirconia ceramics interact with carbon to form zirconium carbide (ZrC), and interact with hydrogen or nitrogen to form the corresponding hydride or nitride. These reactions indicate that the chemical properties of zirconia ceramics may change in a high-temperature vacuum environment, requiring special attention.

4, the stability of the melt

Zirconia ceramics also show stability to compounds such as sulfide and phosphide. In addition, many silicide melts and slag do not work on sintered zirconia ceramics, which further proves the stability of zirconia ceramics in the chemical environment.

However, molten basic silicates and molten silicates containing alkaline earth metals will corrode sintered zirconia ceramics at high temperatures. Therefore, when using zirconia ceramics, it is necessary to avoid direct contact with these melts or long-term exposure in high temperature environments.

5, unique performance and application

In addition to the above chemical properties, zirconia ceramics and their composites also have some unique properties under different conditions, such as semiconductor properties, sensitive functionality and toughness. These properties make zirconia ceramics widely used in electronic ceramics, functional ceramics and structural ceramics.

In summary, zirconia porcelain blocks have the characteristics of weak acid oxides and show stability to acid-base solutions and a variety of compounds, but their chemical properties may change under certain conditions (such as high temperature, vacuum or contact with specific melts). Therefore, when using zirconia ceramics, it is necessary to select the appropriate materials and process parameters according to the specific application environment and conditions.