Hardness and Wear Resistance: Alumina is generally harder on the Mohs scale, which makes it excellent for applications requiring resistance to surface wear and high temperatures. In contrast, zirconia exhibits superior toughness and fracture resistance, beneficial for components that endure high dynamic stresses.

What is the function of alumina in clay?

The incorporation of Al2O3 significantly enhances ceramics' mechanical strength and hardness. Alumina particles serve as reinforcing agents within the matrix, making the material resistant to wear, abrasion, and deformation.

Is alumina ceramic safe?

Fired or sintered ceramic alumina has no known health hazards in solid state. If in air borne form, avoid breathing dust and keep dust out of eyes. This is a non-toxic material with a free silica (quartz) content of less than 1.0% and TLV of a nuisance particulate.