Zirconia Toughened Alumina (ZTA) Ceramic Disc

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ZTA1876 Zirconia Toughened Alumina (ZTA) Ceramic Disc

Catalog No.	ZTA1876
Appearance	White smooth surface
Purity	99%
Shape	Disc
Component	Alumina, Zirconia
Max Working Temp. (℃)	1650 °C

SAM is a global supplier of Zirconia Toughened Alumina Ceramic parts with competitive prices and excellent service. All sizes of ZTA ceramic Discs are finished with fine grinding, regular appearance, and high dimensional accuracy. Other customized shapes of ZTA ceramic are on request.

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Description

Specification

Technical Data Sheet

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.

zirconia

Specification of ZTA Disc

-		Condition	Unit	ZTA Substrate
-		Condition	Unit	ZTA
Material		-	-	Al₂O₃/ZrO₂
Color		-	-	White
Bulk Density		-	g/cm³	4
Surface Roughness Ra		-	µm	0.2
Reflectivity		0.3-0.4mmt	%	80
Reflectivity		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･m^1/2	3.5
Thermal	Coefficient of Thermal Expansion	40-400°C	10^-6/K	7.1
	Coefficient of Thermal Expansion	40-800°C	10^-6/K	8
	Thermal Conductivity	25°C	W/(m･K)	27
	Thermal Conductivity	300°C	W/(m･K)	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)
Item	Unit	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.

packing-disc

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.

Specification

-		Condition	Unit	ZTA Substrate
-		Condition	Unit	ZTA
Material		-	-	Al₂O₃/ZrO₂
Color		-	-	White
Bulk Density		-	g/cm³	4
Surface Roughness Ra		-	µm	0.2
Reflectivity		0.3-0.4mmt	%	80
Reflectivity		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･m^1/2	3.5
Thermal	Coefficient of Thermal Expansion	40-400°C	10^-6/K	7.1
	Coefficient of Thermal Expansion	40-800°C	10^-6/K	8
	Thermal Conductivity	25°C	W/(m･K)	27
	Thermal Conductivity	300°C	W/(m･K)	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