Zirconia Ceramics(ZrO2) materials are used in very high wear applications with very high pressure, possessing higher fracture toughness and stiffness than alumina. Zirconia is widely applied for its high strength, toughness, wear and thermal properties. It warrants its usage for longer life and reduce less time where alumina fails in this applications.

During manufacture, the zirconia powder is combined with oxides such as yttria, magnesia or tetragonal. The material is almost partially stabilized or even it can be fully stabilized if required, the different composition allows different properties to be enhanced.

The main properties of Zirconia Ceramics are as below:

1. Use temperatures up to 850°C
2. High density
3. Low thermal conductivity 
4. Chemical inertness
5. Resistance to molten metals
6. Ionic electrical conduction
7. Wear resistance
8. High fracture toughness
9. High hardness

Unit

95% Al2O3

99% Al2O3

ZrO2

GP-Si3N4

Color

-

white

ivory

white

gray

Density

g/cm³

3.65

3.88

5.95

3.22

Water Absorption

%

0

0

0

0

Young's Modulus

Gpa

280

350

205

295

Vickers Hardness

Gpa

14

20

12

18-20

Flexural Strength ( at R.T. )

Mpa

280

300

900

650

Compressive Strength ( at R.T. )

Mpa

2000

2500

2200

2200

Thermal Conductivity ( at R.T. )

W/(m.K)

18-25

30

2.2

25

Thermal Shock Resistance

ΔT(°C)

220

180-200

280-350

450-650

Max. Working Temperature ( at R.T. )

°C

1500

1700

850

1200

Volume Resistivity ( at R.T. )

Ω.cm

>10^15

>10^14

>10^12

>10^14

Dielectric Constant  (1 MHz at R.T. )

-

9.50

9.80

26

8.20

Dielectric Strength

kV/mm

16

22

-

16

- Wire forming/drawing dies

- Kiln furniture crucible

- Insulating rings in thermal processes

- Fiber optic ferrules and sleeves

- Precision shafts & axles in high wear environments

- Knives and blades

- Furnace process tubes

- Bearings & rollers

- Wear resistance pads

- Ceramic guiders

- Thermocouple protection tubes

- Medical and surgical component

- Sandblasting nozzles

- Mechanical seals

- Extrusion dies

- Pumps, pistons, and liners Pumps, pistons, and liners

- Bushings and caps

- Welding nozzles & pins

As a professional company in advanced ceramic industries, UNIPRETEC is manufacturing and supplying high quality and high precision ceramic components for clients from worldwide. Our ceramic products are widely used in various fields of automotive, metallurgy, machinery, electronic & electrical, food, chemical, medical and so on. With experienced engineers and talented workers, we are able to evaluate projects and drawings properly, make valuable suggestion, supply satisfying products. Our materials including:

- Aluminium Oxide ( 95% 96% 99% 99.5% 99.7% Al2O3 )
- Zirconium Oxide ( Yttria stabilized ZrO2 )
- Silicon Nitride ( Gas pressure sintered & Hot pressed Si3N4 )
- Boron Carbide ( B4C )
- Boron Nitride ( Hot pressed BN )
- Machinable Glass Ceramic

Aiming at building long term cooperation relationship with our clients, we set our motto as "Quality First". Far now, our products have been exported to North Amirica, East Europe, West Europe, East Asia, Southeast Asia and get good reputation from our client.