Description of ZTA Sheets/Plates
Zirconia Toughened Alumina Ceramics (ZTA composite ceramic) exhibits controlled whiteness, corrosion resistance and chemical stability. Aluminium oxide contributes to the measured hardness, while zirconium dioxide enhances fracture toughness. The combination of these materials produces a composite that meets prescribed strength and toughness values, thereby supporting a wide range of applications.
ZTA ceramics exhibit higher flexural strength and fracture toughness at ambient temperatures, which results in increased wear resistance. The ratio of aluminium oxide to zirconium dioxide can be adjusted to meet specific user requirements. Zirconium dioxide pre-stressed aluminium oxide ceramic outperforms 99% pure aluminium oxide ceramic in defined performance metrics and is more cost‑efficient than pure zirconium dioxide ceramic.
This renders ZTA ceramic a viable alternative when pure aluminium oxide ceramic is not suitable for a particular application, as it provides improved cost‑performance while maintaining the required mechanical properties.
Specification of ZTA Sheets/Plates
|
Condition
|
Unit
|
ZTA Substrate
|
|
ZTA
|
|
Material
|
-
|
-
|
Al2O3/ZrO2
|
|
Colour
|
-
|
-
|
White
|
|
Bulk density
|
-
|
g/cm3
|
4
|
|
Surface roughness Ra
|
-
|
µm
|
0.2
|
|
Reflectance
|
0.3-0.4 mmt
|
%
|
80
|
|
0.8-1.0 mmt
|
90
|
|
Mechanical
|
Flexural strength
|
3‑point method
|
MPa
|
700
|
|
Elastic modulus
|
-
|
GPa
|
310
|
|
Vickers hardness
|
-
|
GPa
|
15
|
|
Fracture toughness
|
IF method
|
MPa･m1/2
|
3.5
|
|
Thermal
|
Coefficient of thermal expansion
|
40-400°C
|
10-6/K
|
7.1
|
|
40-800°C
|
8
|
|
Thermal conductivity
|
25°C
|
W/(m･K)
|
27
|
|
300°C
|
16
|
|
Specific heat capacity
|
25°C
|
J/(kg･K)
|
720
|
|
Electrical
|
Dielectric constant
|
1MHz
|
-
|
10.2
|
|
Dielectric loss factor
|
1MHz
|
10-3
|
0.2
|
|
Volume resistivity
|
25°C
|
Ω･cm
|
>1 014
|
|
Breakdown strength
|
DC
|
kV/mm
|
>15
|
Properties of Al2O3, ZTA, and YTZ
|
Item
|
Unit
|
Alumina (Al2O3)
|
Zirconium dioxide (ZrO2)
|
|
AL2O3≥95
|
AL2O3≥99
|
AL2O3≥99,5
|
AL2O3≥99.8
|
ZTA
|
YTZ
|
|
Bulk density
|
g/cm3
|
3.7
|
3.80~3.85
|
3.85
|
3.9
|
3.8~4.6
|
6
|
|
Hardness
|
HRA≥
|
86
|
88
|
88
|
88
|
86~88
|
88~90
|
|
Flexural strength
|
MPa≥
|
300
|
350
|
400
|
400
|
172~450
|
900
|
|
Maximum operating temperature
|
°C
|
1500
|
1500
|
1500
|
1500
|
1400~1500
|
1500
|
|
Linear expansion coefficient
|
×10-6/°C
|
7.5
|
8.2
|
8.2
|
8.2
|
|
|
|
Dielectric constant
|
εr (20°C,1MHz)
|
9
|
9.2
|
9.2
|
9.2
|
|
|
|
Dielectric loss
|
tanδ×10-4,1MHz
|
3
|
2
|
2
|
2
|
|
|
|
Volume resistivity
|
Ω-cm (20°C)
|
1 013
|
1 014
|
1 014
|
1 014
|
1 013
|
1 014
|
|
Breakdown strength
|
KV/mm, DC≥
|
20
|
20
|
20
|
20
|
|
|
|
Acid resistance
|
mg/cm2≤
|
0.7
|
0.7
|
0.7
|
0.7
|
|
|
|
Alkali resistance
|
mg/cm2≤
|
0.2
|
0.1
|
0.1
|
0.1
|
|
|
|
Wear resistance
|
g/cm2≤
|
0.2
|
0.1
|
0.1
|
0.1
|
|
|
|
Compressive strength
|
MPa≥
|
2 500
|
2 500
|
2 500
|
2 800
|
2 300~2 900
|
2 500
|
|
Flexural strength
|
MPa≥
|
200
|
350
|
350
|
350
|
|
|
|
Elastic modulus
|
GPa
|
300
|
350
|
350
|
350
|
|
|
|
Poisson's ratio
|
|
0.2
|
0.22
|
0.22
|
0.22
|
|
|
|
Thermal conductivity coefficient
|
W/m-K (20°C)
|
20
|
25
|
25
|
25
|
|
|
Applications for ZTA Sheets/Plates
1. Wear‑resistant linings: ZTA ceramic sheets and plates are employed as linings in industrial installations, such as chutes, hoppers and conveyor systems, to provide abrasion protection and to maintain specified operational performance.
2. Cutting and grinding tools: They are applied in the manufacture of cutting and grinding tools where measured hardness and wear resistance are required to maintain edge retention and to reduce tool degradation.
3. Heat shields and thermal insulators: They are utilised in high‑temperature environments, for example in furnaces, kilns and heat treatment installations, given their thermal stability and resistance to thermal shock.
4. Biomedical implants: They are used in applications such as dental implants and orthopaedic implants, in which biocompatibility, mechanical strength and controlled wear resistance are significant.
5. Electronic substrates: They are employed in the electronics industry as substrates for electronic components and circuits, utilising their electrical insulation properties and ability to withstand high temperatures.
6. Aerospace and defence: They are used for protective armour components, structural parts and thermal barriers in aerospace and military applications, given that their strength-to-weight ratio meets defined criteria and they withstand extreme conditions.
7. Chemical processing equipment: They are utilised in chemical processing installations where resistance to corrosion, abrasion and high temperatures is required to ensure reliable operation over prolonged periods.
8. Ballistic armour: They are applied in ballistic armour for personal protection and in vehicle armour, offering measured impact resistance and durability against ballistic threats.
9. Precision mechanical components: They are employed in precision mechanics, for example in jigs, fixtures and assembly tools, where high dimensional accuracy and wear resistance are required.
10. Renewable energy: They are used in renewable energy applications, such as wind turbines and solar panels, where durable and weather‑resistant materials are necessary to ensure long‑term performance.
11. Mining and mineral processing: In mining and mineral processing installations these materials are used for components that must withstand severe and abrasive conditions, such as in mills and crushers.
12. Food and beverage industry: They are utilised in components for equipment in the food and beverage sector that must be chemically resistant, wear‑resistant and easy to clean to comply with hygiene standards.
Packaging of ZTA Sheets/Plates
Our ZTA sheets/plates are clearly marked and labelled on the exterior to enable identification and quality control. The products are wrapped in foam to protect against impacts and subsequently packaged in wooden crates. Strict measures are implemented to prevent damage during storage or transport.
Converters & Calculators
