High-purity boron nitride ceramic .
High-temperature resistance, thermal shock resistance, electrical insulation, chemical stability, low friction, and non-wetting performance.
Semiconductor equipment, vacuum furnaces, high-temperature processing, metallurgical equipment, electronic insulation systems, and laboratory equipment.
Serving OEM customers in the United States, Germany, Japan, and Europe.
Custom dimensions, holes, grooves, steps, and complex structures are available according to drawings. Explore our custom ceramic parts .
Lead time is confirmed according to material grade, dimensions, machining complexity, order quantity, and inspection requirements.
High-purity hot-pressed boron nitride (HPBN) ceramic blocks are machinable ceramic components designed for high-temperature, vacuum, and electrical insulation applications. They are commonly used in semiconductor equipment, vacuum furnaces, metal melting systems, and thermal processing equipment. Their thermal shock resistance, electrical insulation, low friction, and non-wetting properties help reduce cracking, molten-metal adhesion, and insulation failure under demanding operating conditions.
This product is manufactured from high-purity hot-pressed boron nitride, commonly known as HPBN, with a typical BN content of at least 99%. The hot-pressing process creates a stable ceramic structure while retaining the excellent machinability of hexagonal boron nitride.
Unlike cubic boron nitride, which is mainly used for cutting tools and abrasives, hot-pressed hexagonal boron nitride is more suitable for high-temperature insulation, vacuum furnace components, semiconductor equipment, thermal processing fixtures, and parts that come into contact with molten metals.
Explore more boron nitride ceramic materials and components .
Hot-pressed boron nitride maintains good thermal stability in vacuum and inert atmospheres. It is suitable for vacuum furnaces, thermal processing equipment, and other high-temperature systems. The recommended operating temperature should be confirmed according to the material grade, atmosphere, mechanical load, and service duration.
Its low thermal expansion helps the material withstand rapid heating and cooling cycles, reducing the risk of cracking, deformation, and dimensional changes.
Boron nitride provides reliable dielectric performance and can be used for insulation blocks, isolation components, and supports in high-temperature, high-voltage, and high-power equipment.
Hot-pressed boron nitride is not easily wetted by molten aluminium, magnesium, or zinc. This helps reduce metal adhesion, material contamination, and equipment maintenance requirements.
Compared with harder ceramics such as alumina, aluminium nitride, and silicon carbide, hot-pressed boron nitride is easier to machine. It can be manufactured with holes, grooves, slots, steps, recesses, and complex profiles.
The material has a naturally low coefficient of friction and a degree of self-lubricating behavior, helping reduce friction and sticking in high-temperature fixtures, positioning components, and contact parts.
CERAMPRO manufactures custom ceramic parts according to product dimensions, operating temperature, working atmosphere, assembly conditions, and inspection requirements.
The following values are typical reference data for high-purity hot-pressed boron nitride. Actual performance may vary according to material grade, component geometry, material orientation, test method, and operating environment. Final specifications should be confirmed for each order.
| Parameter | Typical Technical Value | Functional Significance |
|---|---|---|
| Material Type | Hot-Pressed Boron Nitride (HPBN) | Suitable for high-temperature insulation and precision-machined components. |
| Purity | BN ≥99% | Supports material cleanliness and stability in high-temperature and vacuum environments. |
| Maximum Service Temperature | Approximately 1800°C in vacuum Approximately 2100°C in an inert atmosphere |
Suitable for high-temperature applications in vacuum and inert-atmosphere systems. |
| Thermal Conductivity | 30–60 W/(m·K) | Helps transfer heat and reduce thermal stress caused by localized temperature differences. |
| Dielectric Strength | 25–40 kV/mm | Provides electrical isolation for high-voltage and high-power components. |
| Thermal Expansion | 0.5–4.0 × 10−6/K | Helps components maintain dimensional stability during temperature changes. |
| Coefficient of Friction | 0.2–0.3 | Reduces friction and sticking in high-temperature fixtures and contact components. |
| Hardness | Mohs 2 | Allows drilling, milling, grooving, and machining of complex structures. |
| Wettability | Non-wetting | Helps reduce adhesion when in contact with molten aluminium, magnesium, or zinc. |
| Material | Main Characteristics | Machining Difficulty | Recommended Applications |
|---|---|---|---|
| Hot-Pressed Boron Nitride | High-temperature resistance, electrical insulation, thermal shock resistance, non-wetting behavior, and good machinability | Relatively low | Vacuum furnaces, semiconductor equipment, high-temperature fixtures, and molten-metal contact parts |
| Alumina Ceramic | High hardness, wear resistance, electrical insulation, and cost-effective performance | Difficult after sintering | General insulation components, wear parts, and industrial structural components |
| Aluminium Nitride Ceramic | High thermal conductivity combined with electrical insulation | More difficult than hot-pressed boron nitride | Electronic heat dissipation, semiconductor equipment, ceramic substrates, and heater components |
| Silicon Carbide Ceramic | High strength, wear resistance, corrosion resistance, and high-temperature capability | High | Wear components, furnace parts, vacuum equipment, and corrosive environments |
Hot-pressed boron nitride is generally the better choice when a component requires high-temperature electrical insulation, good machinability, low thermal expansion, and non-wetting performance against molten metals. Alumina or silicon carbide may be more suitable when wear resistance is the main requirement, while aluminium nitride is preferred when efficient heat dissipation is the priority.
A hot-pressed boron nitride ceramic block is a machinable ceramic material produced from high-purity boron nitride powder through a hot-pressing process. It is mainly used for high-temperature insulation, vacuum furnace components, semiconductor equipment, and molten-metal contact parts.
The commonly supplied hot-pressed boron nitride material has a typical BN content of at least 99%. The exact material grade and purity can be selected according to the operating temperature, atmosphere, and cleanliness requirements.
Typical reference temperatures are approximately 1800°C in vacuum and 2100°C in an inert atmosphere. The actual service temperature depends on component geometry, mechanical load, working atmosphere, and continuous operating time.
Yes. Its high-temperature stability, electrical insulation, low thermal expansion, and machinability make it suitable for supports, spacers, insulation blocks, and fixtures used in vacuum furnace systems.
Hot-pressed boron nitride is not easily wetted by molten aluminium, magnesium, or zinc, which helps reduce metal adhesion and contamination. Suitability should still be evaluated according to the metal type, temperature, and contact duration.
Yes. CERAMPRO can manufacture custom external dimensions, holes, grooves, slots, steps, recesses, and other structures according to 2D drawings, 3D models, or physical samples.
Achievable tolerances depend on the component size, thickness, hole depth, wall thickness, structural complexity, and inspection method. The drawing should be reviewed before a suitable machining tolerance can be confirmed.
Boron nitride is suitable when high-temperature insulation, machinability, and non-wetting performance are required. Alumina is often selected for hardness, wear resistance, and cost control. Aluminium nitride is generally preferred when high thermal conductivity and electrical insulation are the main requirements.
Please provide a 2D drawing or 3D model, dimensions, tolerances, order quantity, operating temperature, working atmosphere, contact medium, and inspection requirements. Complete technical information allows the material and machining process to be evaluated more accurately.
Yes. CERAMPRO supports OEM customers in the United States, Germany, Japan, Europe, and other international markets with material confirmation, drawing review, prototype production, custom machining, quality inspection, export packaging, and international delivery.
