In the realm of advanced materials, tetragonal zirconia polycrystal (TZP) beads have emerged as a pivotal component in ceramic and glass processing. Renowned for their superior toughness and wear resistance, these beads are indispensable in precision machining applications. As industries continually seek materials that deliver exceptional performance, TZP beads optimized for ceramic and glass processing stand out as a transformative solution.
By special moulding and sintering technology, ZOLI Y-TZP consists of yttrium stabilized zirconium oxide. Yttrium Stabilized Zirconia (Y-TZP) is the strongest ceramic material we offer. Y-TZP is a purely tetragonal phase, fine grain material. This material offers the highest flexural strength of all Zirconia based materials. It gives significant advantages in the fields of resistance to wear and absence of contamination.
●Chemical Composition:
| Composition | ZrO2 | Y2O3 | Other |
| Content % | 94.8±0.2 | 5.1±0.1 | 0.1% |
●Physical Properties:
| Specific Gravity g/cm3 | Bulk Density kg/L | Hardness Hv | Fracture Toughness MPam1-2 | Crushing Load KN(Φ2.0mm) | Grain size um | Wear loss (%) | Sphericity (%) |
| ≥6.02 | ≥ 3.70 | ≥1250 | 9 |
≥20
| ≤0.5 | ≤0.08 | ≥98 |
● Ball Sizes :
| Size(mm) | Size(mm) | Size(mm) | Size(mm) | Size(mm) |
| Φ0.08-0.12 | Φ0.12-0.18 | Φ0.18-0.22 | Φ0.22-0.28 | Φ0.28-0.35 |
| Φ0.3-0.4 | Φ0.4-0.6 | Φ0.6-0.8 | Φ0.8-1.0 | Φ1.0-1.2 |
| Φ1.2-1.4 | Φ1.4-1.6 | Φ1.6-1.8 | Φ1.8-2.0 | 2.0-2.2 |
| Φ2.2-2.4 | Φ2.4-2.6 | Φ2.6-2.8 | Φ2.8-3.0 | Φ3.0-3.2 |
| Φ3.2-3.5 | Φ4 | Φ5 | Φ6 | Φ7 |
| Φ8 | Φ10 | Φ12 | Φ15 | Φ17 |
| Φ20 | Φ25 | Φ30 | Φ40 | Φ50 |
●Features:
u High density, high grinding efficiency, high hardness;
u Compact Tetragonal Zirconia Polycrystalline (Y-TZP) to give the beads outstanding anti-corrosion and wear resistance;
u Always keep the smooth surface and the good roundness;
u Homogenous structure at high hardness;
u 15% superior to Ceria Stabilized beads in wear rate, proved by many tests.
Tetragonal zirconia polycrystal (TZP) is a form of zirconia stabilized with yttria, featuring a nearly 100% tetragonal structure at room temperature. This configuration grants TZP exceptional fracture toughness and hardness, making it a preferred choice for applications requiring high durability and precision. The fine grain size of TZP contributes to its ability to maintain sharp edges and achieve excellent surface finishes, crucial in machining and processing applications.
TZP exhibits a unique combination of mechanical, thermal, and electrical properties:
-
Mechanical:
- Density: 6.04 gm/cc
- Hardness: 1300 - 1600 Knoop
- Modulus of Elasticity: 29 - 30 x 10^6 psi
- Flexural Strength: 130 - 150 kpsi
- Fracture Toughness: 7 - 13 MPa m^1/2
-
Thermal:
- Coefficient of Thermal Expansion: 5.7 - 11 x 10^-6/°C
- Thermal Shock Resistance: 350°C diff.
-
Electrical:
- Dielectric Strength: 50 AC V/mil
- Volume Resistivity: > 10^13 ohm-cm
These properties ensure that TZP beads can withstand extreme conditions, making them ideal for demanding applications in ceramic and glass processing.
TZP beads are integral to precision machining processes, where maintaining tight tolerances is paramount. Their hardness and fracture toughness enable the machining of ultra-hard materials, such as sapphire and quartz, to precise dimensions. This capability is crucial for industries where component accuracy directly impacts performance and reliability.
In grinding and milling operations, TZP beads offer unmatched wear resistance and stability. Their density and chemical composition facilitate efficient particle size reduction, ensuring uniformity and finer results. This efficiency is particularly beneficial in manufacturing environments where productivity and consistency are critical.
Advanced coating technologies leverage TZP beads to tune the microstructure and thickness of ceramic layers. This tuning is essential for applications requiring specific functional properties, such as enhanced thermal stability or improved biological compatibility. By optimizing the coating process, TZP beads contribute to the development of high-performance ceramic layers.
Recent research has focused on optimizing the sintering process of TZP ceramics. By adding lithium disilicate glass ceramics, researchers have achieved lower sintering temperatures, enhancing the densification and mechanical properties of TZP beads. This innovation not only improves the translucency of the material but also expands its potential applications, particularly in dental restorations.
Surface modification techniques, such as sandblasting, acid etching, and laser treatment, have been employed to enhance the performance of TZP beads. These techniques optimize surface roughness and bioactive coatings, improving cell attachment and proliferation in biomedical applications. Such advancements are crucial for expanding the use of TZP beads in implant materials and other bioceramic applications.
●Storage:
The grinding media should be stored in a dry and clean place.
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Test Equipment:
