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Sharp Zirconia Ceramic Medical Surgical Blades
Zirconia Ceramics
Unlike traditional ceramics that tend to be hard and brittle,
Zirconia offers high strength, wear resistance, and flexibility far
beyond those of most other technical ceramics. Zirconia is a very
strong technical ceramic with excellent properties in hardness,
fracture toughness, and corrosion resistance; all without the most
common property of ceramics – high brittleness.
There are several grades of Zirconia available, the most common of
which are Yttria Partially Stabilized Zirconia (Y-PSZ) and Magnesia
Partially Stabilized Zirconia (Mg-PSZ). Both of these materials
offer excellent properties, however, the operating environment and
part geometry will dictate which grade may be suitable for specific
applications (more on this below). Its unique resistance to crack
propagation and high thermal expansion make it an excellent
material for joining ceramics with metals like steel. Due to
Zirconia’s unique properties it is sometimes referred to as the
“ceramic steel”.
Properties | Unit | Steatite ceramic | 95% Al2O3 | 99% Al2O3 | Zirconia Ceramic |
Density | g/cm³ | 2.8 | 3.6 | 3.8 | 5.6 |
Flexural strength | Mpa | 145 | 300 | 300 | 354 |
Max Working Temperature | ℃ | 1100 | 1400 | 1600 | 1400 |
Sintering temperature | ℃ | 1350 | 1700 | 1750 | 1550 |
Heat resistance | T(℃) | 200 | 220 | 200 | 350 |
Hardness | Gpa | 5.7 | 7 | 10.7 | 12.3 |
Elastic modulus | Gpa | 120 | 275 | 320 | 205 |
Poissons ratio | - | 0.21 | 0.22 | 0.22 | 0.30 |
Linear expansion coefficient | x 10-6/℃ | 7.9 | 7.1 | 7.8 | 9 |
Insulation breakdown Intensity | KT/mm | 10 | 16 | 18 | 15 |
Thermal conductivity | w/(m.k) | 2.5 | 20 | 25 | 2.5 |
Specific Heat | *10-3J/(kg*K) | 0.75 | 0.78 | 0.78 | 0.4 |