What are the differences between alumina and zirconia ceramics

Our ceramic factory has achieved great success in the processing of two types of ceramics, including zirconia and alumina, and the two materials are also different. Next, let's take a look at the comparison of the performance between zirconia and alumina

Performance parameters of zirconia alumina

Alumina ceramic (AL2O3 zirconia ceramic (Zr02)

Performance unit ≥ 95 ≥ 99 ≥ 99.5 ≥ 99.8 ZTA YIZ

Volume density g/cm3 3.7 3.8-3.85 3.85 3.85 3.8-4.6 6

Hardness Mpa ≥ 86 88 88 88 88 86-88 88-90

Bending strength HRA ≥ 300, 350, 400, 172-450, 900

Maximum operating temperature ℃ 1500 1500 1500 1500 1400-1500 1500

Linear expansion coefficient × 10-6/℃ 7.5 8.2 8.2 8.2

Dielectric constant ε R (20 ℃, 1MHz) 9.0 9.2 9.2 9.2

Dielectric loss tan δ× 10-4,1MHz 3 2 2 2

Volume resistivity Ω • cm (20 ℃) 10 ^ 13 10 ^ 14 10 ^ 14 10 ^ 14 10 ^ 13 10 ^ 14

Breakdown strength KV/mm, DC ≥ 20 20 20 20

Acid resistance mg/cm2 ≤ 0.7 0.7 0.7 0.7

Alkali resistance mg/cm2 ≤ 0.2 0.1 0.1 0.1 0.1

Wear resistance g/cm2 ≤ 0.2 0.1 0.1 0.1 0.1

Compressive strength Mpa ≥ 2500 2500 2500 2800 2300-2900 2500

Bending strength Mpa ≥ 200 350 350 350 350

Elastic modulus Gpa 300 350 350 350

Poisson's ratio (lateral deformation coefficient) 0.2 0.22 0.22 0.22

Thermal conductivity W/m • K (20 ℃) 20 25 25 25 13-27 22

Performance parameters of alumina zirconia ceramics

Our ceramic factory specializes in producing high-strength zirconia alumina ceramic materials, including ceramic rods, ceramic tubes, ceramic rings, ceramic plates, ceramic raw materials, and ceramic mechanical parts; Our production technology is at an advanced level, and our product technology has advantages! The special zirconia ceramic materials produced and sold are widely used in fields such as instruments, medical equipment, watches, grinding tools, energy and electricity, construction, mechanical hardware, automobiles, military industry, aerospace, etc.

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