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Zirconia Ceramic Bearings are all-ceramic or hybrid ceramic bearings made from zirconia materials. Zirconia, often referred to as "ceramic steel," was first discovered in 1975 for its excellent mechanical properties. Due to its unique phase transformation toughening mechanism, it has become one of the advanced ceramic materials with the highest strength and toughness at room temperature.
High Insulation Industrial Zirconia ZrO₂ Ceramic Bearings
Product Description
Ceramic Bearings are a typical example of high-performance special bearings. With their unique advantages such as corrosion resistance, high temperature resistance, insulation, and low friction, they have become an ideal replacement for traditional metal bearings and are widely used in high-end industrial fields such as precision manufacturing, medical, chemical, and semiconductor industries.
In terms of performance, they achieve breakthroughs in multiple dimensions compared to bearing steel: their electrical insulation and non-magnetic properties make them suitable for strong electromagnetic and high-voltage insulation scenarios; their high-temperature resistance of 800℃ far exceeds that of metal bearings, allowing for stable operation under extreme high-temperature conditions; their excellent corrosion resistance ensures they do not rust or fail in harsh environments such as acids, alkalis, and salt spray; at the same time, their high hardness and self-lubricating properties significantly extend their service life and reduce maintenance costs, making them particularly suitable for special working conditions such as vacuum, clean environments, and unlubricated environments.
Product Specifications
Core performance characteristics
1.Excellent mechanical properties
| Performance Indicators | Numerical Range | Features |
| Density | 5.68–6.10 g/cm³ | It is approximately 78% steel, with a lightweight design. |
| Vickers Hardness | 11–13 GPa（约1500 HV） | Far superior to ordinary steel, with excellent wear resistance |
| Flexural Strength | 900–1200 MPa | The highest level of ceramic materials |
| Fracture Toughness | 7–10 MPa·m¹/² | Achieve toughening through phase change mechanism |
| Elastic Modulus | ~200 GPa | Its similarity to steel facilitates its integration with metal components. |
2.Stable thermal properties
Temperature range: -200°C to 1000°C (short-term up to 1200°C)
Coefficient of thermal expansion: approximately 10 × 10⁻⁶/°C, similar to steel, facilitating mating with metal shafts
Thermal conductivity: 2–3 W/m·K, low thermal conductivity suitable for insulation applications
Thermal shock resistance: good resistance to thermal shock
3.Chemical and electrical properties
Corrosion resistance: resistant to strong acids (except hydrofluoric acid), strong alkalis, inorganic salts, and organic solvents.
Electrical insulation: volume resistivity up to 10¹² Ω·cm, high resistance prevents arc damage.
Non-magnetic: does not attract dust, avoiding premature bearing spalling and increased noise.
Self-lubricating: low coefficient of friction, good surface finish, enabling oil-free lubrication.
Compared with other ceramic bearing materials
| Feature Comparison | Zirconia | Silicon nitride | Silicon carbide |
| Density | 5.95 g/cm³ (relatively high) | 3.2 g/cm³ (light) | 3.1 g/cm³ (light) |
| Hardness | High | Extremely high | Extremely high |
| Toughness | Highest (closest to metal) | Lower (more brittle) | Low |
| Temperature Resistance | Good (1000°C) | Excellent (1200°C) | Excellent (1600°C) |
| Coefficient of thermal expansion | Similar to steel | Low | Low |
| Applicable Scenarios | Medium to low speed, corrosion resistance, and high toughness requirements | High speed, High temperature, Lightweight | Extreme high temperature, strong corrosion, radiation environment |
Zirconia has a significant advantage in toughness, and its coefficient of thermal expansion matches that of steel, making it easy to manufacture hybrid ceramic bearings.
Main Applications
| Applications | Remark |
| 1.Food and pharmaceutical machinery |
(1)Reasons for application: Resistant to acid and alkali corrosion and free from metal ion contamination, meeting FDA hygiene standards. (2)Typical equipment: filling equipment, mixers, food processing machinery |
| 2. Chemical and marine equipment |
(1)Reasons for application: Resistant to strong acids (except hydrofluoric acid) and seawater corrosion. (2)Typical equipment: chemical pumps and valves, piping systems, marine engineering equipment |
| 3.Medical devices |
(1)Reasons for application: good biocompatibility, can be sterilized by high-temperature steam (above 200°C), non-magnetic. (2)Typical equipment: dental handpieces, surgical instruments, CT scanner rotation system, precision instruments |
| 4.AElectronic and electrical equipment |
(1)Application Reasons: Excellent electrical insulation, preventing arc damage. (2)Typical Equipment: Miniature cooling fans, precision motors, insulated electrical equipment. |
| 5.Home appliances and precision instruments |
(1)Application reasons: Low noise, long lifespan, maintenance-free (2)Typical equipment: High-end coffee machines, power tools, precision measuring instruments |
Summary of Technical Advantages of W7
Selection Recommendations
Scenarios where zirconia ceramic bearings are preferred:
1.Applications requiring high toughness and impact resistance
2.Hybrid bearing designs that work with steel
3.Medium-speed applications requiring high corrosion resistance
4.Cost-sensitive applications with high performance requirements
Scenarios where other materials should be considered
Ultra-high speed applications (>50,000 rpm) → Silicon nitride is superior
Extreme high temperatures (>1000°C) → Silicon carbide or silicon nitride
Maximizing weight reduction → Silicon nitride (density is only 54% of zirconia)
Why choose us?
1.Customized R&D, rather than standard product adaptation
2.Deep control of materials science：Material Selection Based on Needs，Microstructure Optimization，Batch Consistency
3.Precision machining capability：Flatness can reach 0.001mm, parallelism 0.002mm, and roughness Ra 0.1μm.
FAQ
Q1: What products does your company offer?
We specialize in high-performance ceramics such as alumina and silicon nitride, providing insulators, structural components, wear-resistant parts, and customized solutions.
Q2: Can you customize non-standard parts?
Yes. We support processing based on provided drawings and collaborative technical development, offering a full-process service from design to mass production.
Q3: What about accuracy and delivery time?
Standard tolerance ±0.05mm, precision grade ±0.01mm; samples 7-15 days, bulk orders 20-30 days.
Q4: Main application areas?
Power, electronics, machinery, chemical, and aerospace industries.
Q5: Quality assurance measures?
Full-process quality inspection, providing material reports and performance test data, supporting third-party certification and testing.
Q6: Do you provide technical support?
We provide professional support such as material selection consultation, design optimization, and failur
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