Description of ZTA Disc
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.
Specification of ZTA Disc
|
-
|
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
|
|
|
Applications of ZTA Disc
1. Cutting Tools: ZTA ceramic discs are used in cutting tools and machining applications where high hardness, wear resistance, and toughness are essential for processing hard materials.
2. Biomedical Implants: Due to their biocompatibility, ZTA ceramic discs are used in medical implants, such as dental implants, hip replacements, and other orthopedic devices. They offer excellent wear resistance and mechanical strength.
3. Abrasive Tools: Employed in abrasive and grinding tools for finishing and polishing applications. Their hardness and durability make them suitable for precision grinding of metals, ceramics, and other hard materials.
4. Mechanical Seals and Bearings: Used in mechanical seals and bearings, especially in environments requiring high wear resistance, chemical stability, and low friction. They are common in pumps, compressors, and industrial machinery.
5. Thermal and Electrical Insulators: Utilized as insulators in electrical and thermal applications due to their high dielectric strength, thermal stability, and resistance to thermal shock.
6. Wear Components: Incorporated in various industrial wear components, such as valve seats, nozzles, and wear plates, where prolonged exposure to harsh conditions demands high wear resistance and toughness.
7. Cutting Blades and Knives: Applied in cutting blades and knives, especially in industries where precise and durable cutting edges are required, such as in food processing and textile manufacturing.
8. Sensor Components: Used in sensor components that operate under harsh conditions, leveraging their stability and resistance to environmental degradation.
9. Defense and Aerospace: Employed in defense and aerospace applications for parts requiring a combination of lightweight, high strength, and resistance to extreme temperatures and wear.
10. Chemical Processing: Applied in chemical processing equipment where resistance to corrosion, wear, and high temperatures is crucial for the longevity and reliability of the components.
Packaging of ZTA Disc
Our ZTA Disc is clearly tagged and labeled externally to ensure efficient identification and quality control. The products are separated by bubble bags for shockproof purposes and finally packed in wooden or carton boxes. Great care is taken to avoid any damage which might be caused during storage or transportation.
Frequently Asked Questions (FAQ)
- Can ZTA Ceramic Discs be customized for specific applications?
Yes, ZTA ceramic discs can be customized in terms of composition, microstructure, shape, size, and surface finish to meet the specific requirements of different applications.
- How do you handle and maintain ZTA Ceramic Discs?
ZTA ceramic discs should be handled with care to prevent damage, particularly during installation and operation. Regular inspection and maintenance may be necessary to ensure optimal performance and longevity.
- Are ZTA Ceramic Discs suitable for high-temperature applications?
Yes, ZTA ceramic discs exhibit excellent thermal stability and can withstand high temperatures, making them suitable for use in environments with elevated operating temperatures.
