Sintered ceramic Zirconia ZrO2

Sintered ceramic - Zirconia ZrO2


Final Advanced Materials provides high temperature Zirconia ZrO2 sintered ceramics. We can provide rods, plates or machine parts according to your drawings.



Sintered ceramic presentation


Zirconia (ZrO2) has very specific characteristics :

  • High fracture toughness
  • Thermal expansion similar to cast iron
  • Extremely high bending strength and tensile strength
  • High resistance to wear and to corrosion
  • Low thermal conductivity



Zirconium oxide occurs as monoclinic, tetragonal and cubic crystal forms. Densely sintered parts can be manufactured as cubic and/or tetragonal crystal forms. In order to stabilise these crystal structures, stabilisers such as magnesium oxide (MgO) or yttrium oxide (Y2O3) need to be added to the ZrO2.

Characteristics tables

Properties

Units

Alumina

Zirconia

Silicon carbide

Boron nitride

Aluminium nitride

Silicon nitride

Aluminium titanate

Reference N°

 

055-0010

055-0020

055-0021

103-0010

200-0090

055-0030

103-0020

036-0010

Purity

 

Al2O3 99,7%

ZrO2-Y2O3

ZrO2-MgO

SSiC

BN HD

AlN

Si3N4

Al2TiO5

Classification DIN ISO

 

C779

C800

C800

-

-

C910

C935

-

Characteristics table

Density

g/cm3

3.9

6

5.6

> 3.1

2.2

3.3

3.18 to 3.4

3.35

Open Porosity

%

0

0

0

0

0

0

0

12.5

Colour

 

ivory

white

yellow

black

white

grey

grey

ivory

Mechanical characteristics 20°C

Hardness Vickers HV10

N/mm2

> 17 000

> 12 000

> 10 000

> 25 000

-

> 10 500

15 200

< 2000

Compression strength

N/mm2

2 500

> 1800

> 1800

> 2 500

142

> 2000

3 000

-

Flexural strength

N/mm2

> 370

> 600

> 600

> 400

45

> 350

769

25

Elasticity modulus

GPa

> 380

> 200

> 200

400

-

> 320

290

17

Toughness

MPa.m1/2

4

7

8

3.5

 

> 3

7.5

-

Weibull Modulus

 

15

20

16

10

 

-

25

-

Thermal characteristics

Max. operating temperature

°C

1700

1000

1000

1900 (1600 on air)

1400 (850 on air)

1000

1400

1500

Specific heat 20°C

J/kg.K

900

400

400

670

-

-

700

-

Thermal conductivity 100°C

W/mK

30

2.5

3

125

47

180

25

1.4

Thermal expansion 20 to 1000°C

10-6/K-1

8.5

11

11

4.5

5.85

4.6

3.2

< 1

Electrical characteristics

Specific resistivity 20°C

Ω.m

1012

1012

> 10 7

10-3 to 106

1012

> 1010

1012

1012

Specific resistivity 600°C

10 6

> 10 3

> 10 3

-

 

-

-

-

Dielectric strength

kV/mm

17

-

-

-

19.6

15

-

-

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