High Performance Ceramic Bushing
- Excellent electrical insulation for high voltage
- Great wear and tear resistance and high-temperature resistance
- Optional materials according to your specifications
- Various standard types and customized ones are available
- Super dimensional consistency and ideal shape
- From small-part to large-part bushing availability
- Fast turnaround from prototyping to mass production order
Professional Ceramic Bushing Solutions Expert
We are a professional manufacturer of industrial ceramic bushings, boasting over 15 years of production experience. We provide customers around the world with ceramic bushing solutions in various materials, sizes, and application scenarios. Whether you need ceramic bushings for harsh environments such as ultra-high temperatures, high voltage, strong corrosion, or ultra-high precision requirements, our products are designed to meet your needs perfectly.
Why choose us
- A wide range of selected materials, including aluminum oxide (Al2O3), zirconium oxide (ZrO2), steatite, silicon nitride (Si3N4), aluminum nitride (AlN), and so on.
- Flexible customization, various complex configurations, precise dimensions, threads, and surface treatments can be customized
- Demanding quality assurance, from the selection of material suppliers to the delivery of finished products, all are implemented per the ISO management system
- Fast delivery: based on our automatic production lines, the lead time for bulk orders can be significantly shortened from the regular 6 weeks to 3~4 weeks.
Your needs, our mission. Be sure to contact us immediately, and we will provide you with free samples and the most sincere service.
By Material
Ceramic bushings always work as functional parts for supporting, protecting, and guiding wires, rods in high-voltage, high-temperature, high wear resistance, strong corrosive, and so on, demanding environments.
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A most common ceramic bushing because of well-balanced properties and cost advantage.
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Steatite bushings offer superb electrical properties and are a wise choice for an economical solution.
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Ceramic bushings in zirconia present unmatched fracture toughness in high-end applications.
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Silicon Nitride BushingSilicon nitride bushings are used the applications where super mechanical and thermal properties are required.
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Boron nitride bushings are suitable for extra-high-voltage and high-frequency applications.
A Quick Guide for Ceramic Bushings
What Are Ceramic Bushings?
Ceramic bushings are tubular functional components made of high-performance ceramic materials. Due to their high temperature resistance, good electrical insulation, and mechanical strength, they are often used as supporting, insulating, and protective parts in practical applications.
The properties of typical ceramic materials
| General | Property | Unit | Steatite (Mg3Si4O10(OH)2) | Alumina (95~99% Al2O3) | Zirconia
(YSZ ZrO2) |
| Mechanical | Hardness | HV | 500 | 1600~2000 | 1200~1400 |
| Bending strength | MPa | 50~100 | 280~400 | 700~1200 | |
| Wear resistance | Poor | Good | Excellent | ||
| Thermal | Max. Service temperature
(in the air) |
℃ | ≦800 | ≦1500 | ≦800 |
| Thermal shock | ΔT | ≦200℃ | ≦300℃ | ≦600℃ | |
| Electrical | Dielectric strength | kV/mm | 20~30 | 15~18 | 8~12 |
| Chemical | Stability | Acid-resistant, not alkali-resistant | Resistant to strong acids (except HF) and some alkalis | Better acid and alkali resistance than Al2O3 |
The Applications of Typical Bushings
- Steatite Ceramic Bushings
※ Low-frequency electronic insulation: e.g, insulating sleeves for household appliance sockets and switches
※ Low-stress environment: ceramic tube for temperature thermostat, sensor protection tube
※ General industrial components that are cost-sensitive and have no requirements for high strength/high temperature
- Alumina Ceramic Bushings
※ High temperature environments, such as the thermocouple protecting tube
※ High voltage working conditions, such as insulating bushings, circuit board positioning sleeves
※ High mechanical load: Chemical pump valve bushings
※ Corrosion-resistant medium: Inner lining of strong acid (except hydrofluoric acid) conveying pipelines
- Zirconia Ceramic Bushings
※ Wear resistance: textile machinery guide wire wheels, high-precision mold inserts
※ Shock/vibration resistant environment: precision instrument bearing sleeves, dental implant catheters
※ Biocompatibility requirements: medical implant guide sleeves,
These following details are necessary: type of material, dimensions, surface treatments, working conditions and other special requirements. It would great to provide complete technical specifications if it’s available.
From the shapes to the view of ceramic bushings, the main types cover shoulder bushing, guide bushing, sleeve bushing, and so on.
The appropriate material of ceramic bushing is a critical thing in the real application, refer to the following table:
| Material | Features | Typical applications |
| Steatite (Mg3Si4O10(OH)2) | High electrical insulation, low cost | Low-frequency electronic insulators
Low stress environment |
| Alumina (Al2O3) | High electrical insulation, high hardness
Good high-temp and chemical stability |
High voltage, high wear and tear, and strong corrosion conditions |
| Zirconia (ZrO2) | High fracture toughness and bending strength | Textile ceramic guides, high precision equipment manufacturing |
If it’s a custom ceramic bushing, the first order will take 6 weeks, and it will be 5 weeks for repeat orders.
In addition, the lead time for standard bushings is 4 weeks.
Our sample policy is to support free samples for standard bushings in stock. There is no required MOQ.
For a customized one, a mold charge is needed. The MOQ depends on the complexity, grade of dimensional tolerance of ceramic part.