Zirconia Ceramic

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		/