Place of Origin:GuangDong China
Material Description: Made from high-purity Boron Nitride Ceramic (BN), this ceramic ring is designed for applications where metal rings, graphite rings, or conventional oxide ceramics may not provide the required thermal stability, machinability, or clean insulation performance.
Functional Features: BN ceramic rings offer good machinability, low friction, low wettability, electrical insulation, and stable performance in high-temperature vacuum or inert atmosphere environments. They can be customized with precise inner diameter, outer diameter, thickness, grooves, stepped edges, slots, or special ring structures according to drawings.
Application Industries: Commonly used in high-temperature furnace assemblies, vacuum equipment, molten metal handling, crystal growth systems, electrical insulation structures, and selected semiconductor ceramic parts where clean, non-metallic, and thermally stable components are required.
Global OEM Supply: Serving OEM customers in the USA, Germany, Japan, and Europe.
Delivery Time: Lead time depends on the ring diameter, wall thickness, machining complexity, tolerance level, material grade, and order quantity. Please provide drawings, samples, or working conditions for production and delivery confirmation.
Boron nitride ceramic rings are precision-machined BN components used for high-temperature sealing, electrical insulation, vacuum assemblies, molten metal handling, and crystal growth systems. Made from high-purity boron nitride ceramic, they help reduce sticking, metal contamination, poor insulation, and thermal instability in demanding industrial and clean process environments.
This product is made from high-purity Boron Nitride Ceramic (BN), including hot-pressed boron nitride (HPBN) or pyrolytic boron nitride (PBN) depending on application requirements. BN is a machinable advanced ceramic material with good electrical insulation, thermal shock resistance, low friction, low wettability, and stable performance in vacuum or inert atmosphere conditions.
Compared with many oxide ceramics, boron nitride is easier to machine into detailed ring structures such as grooves, slots, thin walls, steps, chamfers, and customized inner or outer diameters. It is especially suitable for applications where clean insulation, low adhesion, and non-metallic thermal stability are more important than heavy structural loading.
| Parameter | Technical Indicator | Functional Significance |
|---|---|---|
| Material Type | HPBN (Hot Pressed Boron Nitride) / PBN (Pyrolytic Boron Nitride) | Different BN grades can be selected based on purity, mechanical performance, machining needs, and working environment. |
| Max Service Temperature | Up to 1800°C in vacuum / up to 2100°C in inert atmosphere | Suitable for high-temperature sealing, insulation, furnace assemblies, and thermal process applications. |
| Thermal Conductivity | 30–100 W/(m·K) | Supports heat transfer and helps reduce localized hot spots in high-temperature ring assemblies. |
| Dielectric Strength | 25–40 kV/mm | Provides strong electrical insulation performance under demanding thermal conditions. |
| Thermal Expansion | 0.5–4.0 × 10-6/K | Low expansion helps improve dimensional stability during heating and cooling cycles. |
| Hardness | Mohs 2 | Relatively soft and easy to machine into complex ring shapes, grooves, slots, and thin-wall structures. |
| Chemical Resistance | Excellent / Inert | Resistant to many molten salts, metals, and corrosive gases under suitable working conditions. |
| Lubricity | Self-lubricating | Low friction helps prevent sticking, adhesion, and assembly resistance in high-temperature applications. |
| Custom Structures | ID, OD, thickness, grooves, steps, slots, chamfers, and special ring profiles | Can be precision-machined according to drawings, samples, or specific assembly requirements. |
| Typical Uses | Sealing rings, insulation rings, spacer rings, furnace rings, molten metal contact parts, and crystal growth fixtures | Used where clean insulation, low wettability, thermal stability, and non-metallic performance are required. |
Note: The above values are typical reference data and may vary depending on the boron nitride grade, production process, part size, and working environment. Please provide drawings and application conditions for material selection confirmation.
| Material | Main Advantage | Limitation | Suitable Applications |
|---|---|---|---|
| Boron Nitride Ceramic | Machinable, insulating, low friction, low wettability, and self-lubricating | Not intended for heavy structural loads | High-temperature insulation, vacuum systems, molten metal contact, and clean process rings |
| Alumina Ceramic | Hard, wear-resistant, cost-effective, and electrically insulating | More difficult to machine into complex shapes after sintering | Wear parts, insulation parts, and general industrial ceramic components |
| Zirconia Ceramic | High toughness, good mechanical strength, and smooth surface finish | Not ideal for low-wetting molten metal contact or clean high-temperature insulation | Precision mechanical parts, wear-resistant rings, and structural ceramic components |
| Graphite | Easy to machine and stable in many thermal applications | May generate particles and is electrically conductive | Thermal fixtures where carbon material and conductivity are acceptable |
| Metal Rings | High strength and easy assembly | Conductive, may oxidize, and may cause metal contamination | Mechanical structures where insulation and non-metallic cleanliness are not required |
A boron nitride ceramic ring is a precision-machined BN component used for sealing, insulation, spacing, and clean process support in high-temperature, vacuum, or inert atmosphere environments.
They are commonly used in high-temperature furnaces, vacuum equipment, molten metal handling systems, crystal growth equipment, electrical insulation assemblies, and selected semiconductor process fixtures.
Yes. CERAMPRO can manufacture custom BN rings based on drawings, samples, or application requirements, including custom ID, OD, thickness, grooves, steps, slots, chamfers, and special ring profiles.
HPBN is hot-pressed boron nitride and is often used for machinable custom ceramic parts. PBN is pyrolytic boron nitride and is usually selected for higher purity and more demanding clean process applications. The suitable grade depends on purity, temperature, structure, and working environment.
Boron nitride is a better choice when the application requires good machinability, low friction, low wettability, clean insulation, and thermal shock resistance. Alumina and zirconia are usually better for high-strength or heavy wear applications.
Yes. BN ceramic is often used in applications where low wettability and clean separation from molten metals are required. The final material grade should be selected based on the metal type, temperature, atmosphere, and contact condition.
Yes. BN rings can be used in selected semiconductor-related fixtures and thermal process components where clean, non-metallic, electrically insulating, and thermally stable materials are required.
Boron nitride is not normally selected for heavy structural loading. For applications requiring higher mechanical strength, alumina, zirconia, silicon nitride, or silicon carbide may be more suitable.
Yes. CERAMPRO supports OEM customers, equipment manufacturers, and engineering companies in the USA, Germany, Japan, Europe, and other global markets with drawing-based customization, sample support, inspection, and export-ready packaging.
Please provide drawings, inner diameter, outer diameter, thickness, tolerance, groove or step details, quantity, working temperature, atmosphere, and application environment. This helps us confirm the suitable BN grade, machining process, and production plan.
