Zirconia Toughened Alumina (ZTA) Ceramic Rod Description
Zirconia Toughened Alumina Ceramics (ZTA composite ceramics) possess notable characteristics such as whiteness, corrosion resistance, and excellent chemical stability. Alumina provides high hardness, while zirconia contributes to good toughness. The combination of these materials forms a superior composite with high strength and toughness, enabling a wide range of applications.
ZTA ceramics exhibit higher flexural strength and fracture toughness at normal temperatures, resulting in outstanding wear resistance. The ratio of alumina to zirconia can be adjusted to meet specific user requirements. Zirconia toughened alumina ceramics outperform 99% alumina ceramics in terms of performance while being more cost-effective compared to pure zirconia ceramics.
This makes ZTA ceramics an excellent choice when alumina ceramics are not suitable for a given application, offering improved cost-performance and maintaining desirable mechanical properties.
Zirconia Toughened Alumina (ZTA) Ceramic Rod Specification
| |
Condition
|
Unit
|
ZTA Substrate
|
|
ZTA
|
|
Material
|
-
|
-
|
Al2O3/ZrO2
|
|
Color
|
-
|
-
|
White
|
|
Bulk Density
|
-
|
g/cm3
|
4
|
|
Surface Roughness Ra
|
-
|
µm
|
0.2
|
|
Reflectivity
|
0.3-0.4mmt
|
%
|
80
|
|
0.8-1.0mmt
|
90
|
|
Mechanical
|
Bending Strength
|
3-point method
|
MPa
|
700
|
|
Modulus of Elasticity
|
-
|
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
|
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
|
>1014
|
|
Breakdown Strength
|
DC
|
kV/mm
|
>15
|
Performance of Al2O3, ZTA, and YTZ
|
Item
|
Unit
|
Alumina(AL2O3)
|
Zirconia(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
|
|
Bending Strength
|
Mpa≥
|
300
|
350
|
400
|
400
|
172~450
|
900
|
|
Maximum Service Temperature
|
℃
|
1500
|
1500
|
1500
|
1500
|
1400~1500
|
1500
|
|
Linear Expansion Coefficient
|
×10-6/℃
|
7.5
|
8.2
|
8.2
|
8.2
|
|
|
|
Dielectric Constant
|
εr(20℃,1MHz)
|
9
|
9.2
|
9.2
|
9.2
|
|
|
|
Dielectric Loss
|
tanδ×10-4,1MHz
|
3
|
2
|
2
|
2
|
|
|
|
Volume Resistivity
|
Ω·cm(20℃)
|
1013
|
1014
|
1014
|
1014
|
1013
|
1014
|
|
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
|
|
|
|
The Compressive Strength
|
Mpa≥
|
2500
|
2500
|
2500
|
2800
|
2300~2900
|
2500
|
|
Flexural Strength
|
Mpa≥
|
200
|
350
|
350
|
350
|
|
|
|
Modulus of Elasticity
|
Gpa
|
300
|
350
|
350
|
350
|
|
|
|
Poisson's Ratio
|
|
0.2
|
0.22
|
0.22
|
0.22
|
|
|
|
Coefficient of Thermal Conductivity
|
W/m·K(20℃)
|
20
|
25
|
25
|
25
|
|
|
Zirconia Toughened Alumina (ZTA) Ceramic Rod Applications
Zirconia Toughened Alumina (ZTA) Ceramic Rods are widely applied across diverse industries for their unique properties. They excel in mechanical engineering as wear components in pumps, seals, bearings, and cutting tools for machining applications. In the medical field, ZTA is utilized for surgical instruments due to its biocompatibility and corrosion resistance. The semiconductor industry employs ZTA in wafer processing, benefiting from its thermal stability and mechanical strength. In chemical processing, ZTA serves in reactor components for its resistance to corrosion and harsh chemicals. Aerospace, automotive, and energy sectors utilize ZTA for engine components and gas turbines, where high strength, thermal resistance, and wear resistance are essential. Additionally, ZTA finds applications in consumer goods like sporting equipment for its durability and lightweight properties. Overall, Zirconia Toughened Alumina ceramic rods enhance performance, reliability, and longevity in critical components across various industrial applications.
Zirconia Toughened Alumina (ZTA) Ceramic Rod Packaging
Our ZTA Rod is clearly tagged and labeled externally to ensure efficient identification and quality control. The products are wrapped in plastic foam for shockproof purposes and finally packed in wooden boxes. Great care is taken to avoid any damage which might be caused during storage or transportation.
Frequently Asked Questions (FAQ)
- Can ZTA Ceramic Rods be customized for specific applications?
Yes, ZTA ceramic rods can be customized in terms of composition, microstructure, dimensions, tolerances, surface finish, and other properties to meet the specific requirements of different applications.
- How do you handle and machine ZTA ceramic rods?
ZTA ceramic rods should be handled with care to prevent damage, particularly during transportation, storage, and machining. Diamond tools or abrasive grinding methods are often used for shaping and finishing ZTA ceramics.
- Are ZTA Ceramic Rods suitable for high-temperature applications?
Yes, ZTA ceramic rods exhibit excellent thermal stability and can withstand high temperatures, making them suitable for use in environments with elevated operating temperatures.
.jpg)
