Product Details
1. Overview of Alumina Ceramic Ring
1.1 Product Brief Introduction
The alumina ceramic ring is a precision structural ceramic component manufactured with high-temperature sintered alumina material. We supply 95%, 99% and 99.5% alumina grades. Different from ordinary metal and plastic rings, it integrates high mechanical strength, excellent high-temperature stability, superior insulation and corrosion resistance. It is a durable precision part tailored for high-temperature equipment, electronic insulation and mechanical wear-resistant assemblies. The product adopts integral sintering and precision machining molding, with compact structure and smooth burr-free surface. It can work stably under high temperature and corrosive atmosphere, solving the problems of oxidation, deformation and rapid abrasion of metal accessories in harsh working environments.
1.2 Production Technology
The alumina ceramic ring is manufactured through dry pressing and high-temperature sintering technology. High-purity alumina powder is shaped by mold pressing or isostatic pressing, then sintered at ultra-high temperature to achieve dense bulk density. After sintering, the blank undergoes precision grinding and inner/outer diameter polishing to guarantee high dimensional accuracy. All dimensional specifications including inner diameter, outer diameter, thickness and special grooves can be customized according to customer drawings, adapting to different industrial equipment.
2. Core Characteristics
2.1 Excellent High Temperature Resistance
99% alumina grade supports continuous working temperature up to 1600°C. It maintains stable physical properties under long-term high-temperature conditions and will not soften or deform inside heating devices.
2.2 High Flexural Strength
The flexural strength reaches up to 550 MPa for 99% alumina material. It owns outstanding structural rigidity and resists breakage under external pressure and mechanical load.
2.3 Zero Water Absorption & Dense Sintered Structure
95% and 99% alumina rings achieve zero water absorption. The compact body blocks penetration of corrosive gas and liquid, greatly improving service life in alkali and high-humidity environments.
2.4 Controlled Thermal Expansion Performance
The thermal expansion coefficient ranges from 7.0~7.9 ×10⁻⁶/°C (25-1000°C). Stable expansion performance reduces cracking risks caused by frequent heating and cooling cycles.
2.5 Superior Electrical Insulation
Alumina ceramic features high volume resistivity at high temperature, providing reliable electrical isolation. It effectively avoids short-circuit risks for electronic assemblies operating under high temperature.
2.6 Reliable Batch Consistency
High-temperature sintered alumina material delivers stable mechanical properties between batches. Each batch of alumina rings maintains uniform quality, which benefits stable equipment operation and standardized spare part management.
3. Core Advantages
3.1 Extended Service Life
The combination of high hardness, dense microstructure and corrosion resistance brings long-lasting wear performance. Under identical working conditions, it has a far longer service cycle than ordinary metal and plastic rings, lowering equipment shutdown and replacement frequency.
3.2 Stable Equipment Operation Accuracy
Precision machined smooth surface and stable dimensional property ensure consistent assembly accuracy during long-term continuous operation. It effectively reduces equipment jitter and assembly clearance changes.
3.3 Reduced Maintenance Cost
Alumina ceramic will not rust and resists most acid, alkali and oil mediums. It does not require frequent anti-corrosion treatment or lubrication maintenance, cutting long-term operation management costs.
3.4 Customized Dimensional Flexibility
We support full customization according to customer drawings, including inner diameter, outer diameter, thickness, step surface and groove structure. We can provide matched specifications for heating furnaces, electronic equipment and automation machinery.
3.5 Safe and Stable Operation
Good thermal shock resistance lowers fracture risks during temperature fluctuation. Excellent insulation avoids electric leakage risks, supporting safer continuous production.
4. Main Application Fields
4.1 High-Temperature Furnace Accessories
Used as positioning rings, isolation rings and support rings inside tube furnaces, box furnaces and industrial sintering kilns for high-temperature component separation and positioning.
4.2 Electronic & Semiconductor Equipment
Applied as insulating sealing rings and spacing rings for electronic components, power modules and thermal testing fixtures to achieve high-temperature electrical isolation.
4.3 Automation & Wear-Resistant Machinery
Serves as wear-resistant guide rings, limit rings for textile machinery, packaging equipment and precision automation assemblies.
4.4 Thermocouple & Temperature Measuring Equipment
Used as insulating positioning rings for temperature measuring probes, isolating thermocouple wires and preventing short circuits.
4.5 Chemical Corrosion Resistance Equipment
Suitable for medium isolation and mechanical positioning in low-melting molten liquid, oxidizing corrosive gas environment.
4.6 Equipment Spare Parts Supply
Supplied as replacement wear-resistant and high-temperature resistant spare parts for equipment upgrading and maintenance projects. Factories can replace vulnerable metal parts with alumina ceramic rings to reduce overall operating expenses.
5. Technical Data
| The main chemical ingredient |
|
|
Al2O3 |
Al2O3 |
Al2O3 |
| Bulk Density |
|
g/cm3 |
3.6 |
3.89 |
3.4 |
| Maximum Use Temperature |
|
|
1450°C |
1600°C |
1400°C |
| Water absorption |
|
% |
0 |
0 |
< 0.2 |
| Flexural strength |
20°C |
MPa (psi x 103) |
358 (52) |
550 |
300 |
| Coefficient of thermal expansion |
25 - 1000°C |
1×10⁻⁶/°C |
7.6 |
7.9 |
7 |
| Coefficient of thermal conductivity |
20°C |
W/m·K |
16 |
30 |
18 |
Development History
Patents and certification
We’ve obtained various global certifications including CE, EMC, LVD, RoHS, FDA, MSDS, ISO 9001, SGS and TUV. We also own eight registered trademarks and forty technical patents to support independent R&D.
Our proprietary core technologies run through all product lines: porous ceramics, industrial ceramic components, special glass, metallized ceramics, liquid absorption cotton, ozone generators and silicone goods. All products are manufactured in strict accordance with international quality standards, delivering reliable and high-performance solutions that have gained wide recognition and market trust worldwide.
Package
We adopt scientific and standardized packaging solutions tailored to product characteristics to effectively prevent collision, extrusion, dust and moisture damage. With mature global transportation system and strict shipment inspection procedures, we ensure all products remain intact and stable during long-distance delivery, providing customers with safe, efficient and reliable one-stop logistics service.
Services
Inquiry & Customization
We provide fast and accurate quotation response for all your inquiries. Flexible OEM & ODM customization solutions are available to meet your unique product design, packaging and branding requirements.
Order Quality Control
We keep clients updated with full production progress throughout the whole order cycle. Our QC team carries out strict comprehensive pre-shipment inspection to guarantee all goods comply with your quality standards before delivery.
Customs Document Support
We prepare a full set of standard export documents including commercial invoice, packing list, certificate of origin and other certification papers, to ensure smooth global customs clearance for shipments to all destinations worldwide.
One-Stop Logistics
Multiple shipping methods including sea freight, air freight and express delivery are offered to match your schedule and budget. We supply real-time cargo tracking service so you can monitor shipment status anytime.
Flexible Payment
We support a wide range of secure international payment terms such as T/T, L/C, Western Union and other mainstream cross-border settlement methods to reduce your cross-border transaction risks.
After-Sales Support
Our professional after-sales team offers timely technical and business support all year round. We maintain steady long-term stable supply capacity to fully back up your continuous market sales and project demands.
FAQ
01
Question: Can you produce based on customers’ drawings or physical samples?
Answer: Absolutely yes. We accept technical drawings in all mainstream file formats as well as actual physical samples. Before formal production, our engineering team will provide a full professional DFM feasibility evaluation for your reference.
02
Question: How long is the production lead time for custom orders?
Answer: Sample lead time: 3–7 working days. Custom mold lead time: 5–10 working days (we will confirm the cycle separately with you for complex molds). Mass production lead time: 7–20 working days, depending on product structure complexity and order quantity.
03
Question: What’s your minimum order quantity for custom products?
Answer: We provide flexible MOQ solutions for all customized items. We will try our best to set a low minimum order volume to support your small-batch trial orders, meanwhile we can handle stable mass production to satisfy your long-term bulk demands.
04
Question: What customization services can you provide?
Answer: We support comprehensive one-stop customization, including product size, shape, appearance, precision tolerance, surface treatment, hole grooving, bending, cutting and adjustable high-temperature resistant parameters. Custom engraved LOGO and exclusive customized packaging are also available as extra personalized options upon request.
05
Question: Do you accept third-party inspection of finished products?
Answer: Yes, we fully cooperate with all mainstream authorized third-party testing institutions. Well-known organizations such as SGS, BV and other internationally recognized inspection bodies are all acceptable. We can supply complete official inspection reports and material certification documents as you require.
06
Question: Can you customize raw material options for products?
Answer: Sure. We can select and match appropriate raw materials according to your application scenarios, working conditions and performance requirements, including alumina, zirconia, quartz, silicone and other special engineering materials, and adjust related performance parameters to meet your usage standards.
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