ZIRCONIA CERAMIC


Suntek Material supplies customized Zirconia Ceramic in full series of different shapes and dimensions. The basic types of Zirconia material is as follows:


Yttria stabilized tetragonal zirconia


Zirconia naturally occurs in the form of the mineral baddeleyite. For ceramics purposes, however, it is extracted from zirconium sand and other minerals containing zirconium in order to satisfy high standards of purity. Zirconia offers chemical and corrosion resistance at high temperatures up to 2100°C – well above the melting point of Alumina. In its pure form, crystal structure changes limit use in mechanical/temperature applications, but stabilised Zirconias with Ytrium Oxide or Magnesium additives can produce materials with very high strength, hardness and in particular, toughness.


Magnesia partially stabilized zirconia


Zirconia naturally occurs in the form of the mineral baddeleyite. For ceramics purposes, however, it is extracted from zirconium sand and other minerals containing zirconium in order to satisfy high standards of purity. Zirconia offers chemical and corrosion resistance at high temperatures up to 2100°C – well above the melting point of Alumina. In its pure form, crystal structure changes limit use in mechanical/temperature applications, but stabilised Zirconias with Ytrium Oxide or Magnesium additives can produce materials with very high strength, hardness and in particular, toughness.


Zirconia toughness alumina


Zirconia toughened alumina (ZTA) ceramic is a composite fine ceramic material, in which a certain content zirconia material is added inside to improve alumina comprehensive mechanical properties. Such kind of composite ceramic not noly have very high tougness and strength propoteries like zirconia, but also have very high hardness like alumina. Because of this high comprehensive property, ZTA ceramic has outstanding wear resistance. Reasonable component control and homogeneous structure of ZTA have very good property and was widely used in different application.


The technical parameters of Suntek Zirconia Ceramic is as follows:


3 mol% Yttria Stabilized Zirconia (3Y-TZP)

Characteristics

Item

Unit

Value

 

 

 



Mechanical Characteristics

Colour

 

Iory

Density

g/cm3

6.02

Bending Strength

MPa

1,000

Compressive Strength

MPa

3,000

Elastic Modulus

GPa

200

Fracture Toughness

MPam1/2

8~10

Weber Coefficient

M

15

Vickers Hardness

HV0.5

1,300

 

 

 

Thermal Characteristics

Coefficient of Line Thermal Expansion

10-6K-1

10

Thermal Conductivity

W/mK

3

Thermal Shock Resistance (Put in Water)

T°C

300

Max Working Temperature

°C

1,000

 

 

 Electrical Characteristics

Volume Resistance at 20°C

Ωcm

>1013

Dielectric Strength

V/m

11×106

Dielectric Constant

εr

33

One MHZ Dielectric Loss Angle at 20°C

tanδ

0.0016

 

 Chemical Characteristics

Nitric Acid (60%) 90°C

 

 

WTLossmg/cm2/day

0

Sulphuric Acid (95%) 95°C

0.04

Caustic Soda (30%) 80°C

0.08

 

9 mol% Magnesia Partially Stabilized Zirconia (Mg-PSZ)

Characteristics

Item

Unit

Value

 

 

 


Mechanical Characteristics

Colour

 

Yellow

Density

g/cm3

5.70

Bending Strength

MPa

500

Compressive Strength

MPa

2,500

Elastic Modulus

GPa

250

Fracture Toughness

MPam1/2

6~7

Weber Coefficient

M

12

Vickers Hardness

HV0.5

1,100

 

 

 

Thermal Characteristics

Coefficient of Line Thermal Expansion

10-6K-1

10

Thermal Conductivity

W/mK

3

Thermal Shock Resistance (Put in Water)

T°C

450

Max Working Temperature

°C

2,100

 

 

 Electrical Characteristics

Volume Resistance at 20°C

Ωcm

>1014

Dielectric Strength

V/m

13×105

Dielectric Constant

εr

28

One MHZ Dielectric Loss Angle at 20°C

tanδ

0.0017

 

 Chemical Characteristics

Nitric Acid (60%) 90°C

 

 

WTLossmg/cm2/day

0.10

Sulphuric Acid (95%) 95°C

0.34

Caustic Soda (30%) 80°C

0.95

 

Alumina toughness Zirconia (ZTA)

Characteristics

Item

Unit

Value

 

 

 



Mechanical Characteristics

Colour

 

White

Density

g/cm3

4.20

Bending Strength

MPa

550

Compressive Strength

MPa

2,900

Elastic Modulus

GPa

360

Fracture Toughness

MPam1/2

5~6

Weber Coefficient

M

15

Vickers Hardness

HV0.5

1,600

 

 

 Thermal Characteristics

Coefficient of Line Thermal Expansion

10-6K-1

8.3

Thermal Conductivity

W/mK

27

Thermal Shock Resistance (Put in Water)

T°C

300

Max Working Temperature

°C

1,500

 

 

 Electrical Characteristics

Volume Resistance at 20°C

Ωcm

>1014

Dielectric Strength

V/m

9×106

Dielectric Constant

εr

10.6

One MHZ Dielectric Loss Angle at 20°C

tanδ

0.0005

 

 Chemical Characteristics

Nitric Acid (60%) 90°C

 

 

WTLossmg/cm2/day

  /

Sulphuric Acid (95%) 95°C

  /

Caustic Soda (30%) 80°C

  /


   

   

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