Properties and Advantages of Alumina ceramics

Alumina ceramics are the most common and relatively traditional material for advanced precision ceramics. High purity alumina ceramics have been widely used in many industries as an excellent ceramic material. The material has excellent properties in terms of electrical insulation, high thermal conductivity, high chemical resistance, good wear resistance, and low thermal expansion. Alumina ceramics can be classified into several application grades according to their alumina content. 99% of alumina ceramics are used to make high-temperature crucibles, refractory furnace tubes, and special wear-resistant materials such as ceramic bearings, ceramic seals, and water valves; 95%-96% of alumina ceramics are mainly used as corrosion and wear-resistant components and circuit substrates. To Good Ceramics can provide many different types of alumina, including injection molding, molding, isostatic pressing, slip casting, and extrusion. Do you know the properties of alumina ceramics and their advantages?  Next, let's learn more about it.

Here is the content list:

• The chemical formula of alumina ceramics.
  

• Colors of alumina ceramics.

• The density of alumina ceramics.

• Properties of alumina ceramics.

• Advantages of alumina ceramics

The chemical formula of alumina ceramics.

Al2O3 has a very high melting point of 2,072°C and is very hard.

Colors of alumina ceramics.

Alumina ceramics vary in color depending on their alumina content. 95%-96% of alumina ceramics are milky white, while 99% of alumina ceramics are yellow.The density of alumina ceramics.

Alumina ceramics vary in density according to their alumina content. 95%-96% alumina ceramics are 3.7-3.8g/cm³, while 99% alumina ceramics are 3.8-3.9g/cm³.

Properties of alumina ceramics.

1. Excellent electrical insulation (1×10 14 ~ 1×10 15 Ω cm);

   
   

2. Medium to ultra-high mechanical strength (300 to 630 MPa).

   
   

3. Very high compressive strength (2000 to 4000 MPa).

   
   

4. High hardness (15 to 19 GPA).

   
   

5. Medium thermal conductivity (20 to 30 W / MK);

   
   

6. High corrosion and wear resistance.

   
   

7. Good abrasive properties.

   
   

8. Low density (3.75 to 3.95 g / cm3).

   
   

9. Operating temperatures of 1000 to 1500°C without mechanical load.

   
   

10. Bio-inertia, food compatibility.

Advantages of alumina ceramics

1. Alumina ceramics have excellent insulation, high frequency loss is relatively small but good high-frequency insulation characteristics.

   
   

2. Alumina ceramic has heat resistance, with a small coefficient of thermal expansion, mechanical strength as well as good thermal conductivity, and other characteristics.

   
   

3. Alumina ceramics with chemical resistance and molten metal characteristics.

   
   

4. Alumina ceramic is non-combustible, stainless sturdy not easily damaged as with other organic materials and metal materials with incomparable excellent properties.

   
   

5. Alumina ceramic wear resistance, but the hardness and corundum are the same, to reach Mohs hardness nine wear resistance to rival the super-hard alloy.

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