Pyrolytic Boron Nitride (PBN/PG) Heater – Ultra-High Purity, High-Temperature Precision Heating

Our PBN/PG heater is a high-performance heating element designed for high-temperature, high-vacuum, and ultra-pure applications. It features a three-layer structure (PBN-PG-PBN), combining a pyrolytic graphite (PG) heating layer with a fully encapsulated pyrolytic boron nitride (PBN) substrate, manufactured using Chemical Vapor Deposition (CVD). This advanced ceramic system ensures maximum purity, electrical insulation, and chemical resistance.

Ideal Applications

• Molecular Beam Epitaxy (MBE) – growth of high-quality single-crystal films under UHV conditions
• Crystal growth systems
• Semiconductor and thin-film processes – wafer annealing, thin-film deposition, doping processes
• Research labs and high-vacuum instrumentation
• Metal evaporation – heating metal sources in vacuum coating systems
• High-temperature experiments – material testing or high-temperature chemical reactions
• Optoelectronic device fabrication – stable high-temperature environment for lasers, LEDs, and other components
• Superconducting materials research – precise high-temperature control for superconducting films

✅ Key Features

• Ultra-high purity: 99.999%
• High-temperature stability: Operates stably above 1600 °C, fast heating to >1700 °C
• Contamination-free: No gas release at high temperatures, ideal for UHV and cleanroom applications
• Thermal uniformity: Consistent temperature distribution minimizes process variations
• Thermal shock resistance: Withstands rapid heating and cooling without cracking or damage
• Chemical stability: Inert to almost all metals, liquids, and gases
• Fast response time: Rapid heating and precise temperature control
• Highly customizable: Flexible design in shapes, dimensions, thermal gradients, and electrical specifications

📐 Material and Manufacturing Data

• Material structure: PBN-PG-PBN
• Density: 1.95–2.20 g/cm³
• Manufacturing: High-temperature CVD
• Standard and custom sizes: Available in stock, short lead times
• Operating atmosphere: Vacuum, inert gas, or air
• Mechanical tolerances: ISO 2768-m (medium tolerance class), unless otherwise specified

Technical Specifications Table

Compatible replacement heaters for many existing PBN/PG heater installations. Custom geometries and electrical specifications available upon request.

⚙️ Customization Options

To customize your PBN/PG heater, please provide the following information:

1. Dimensions: Length, height, diameter, and thickness
2. Material purity
3. Shape – desired geometry
4. Temperature range
5. Specific application or process
6. Operating atmosphere: Vacuum, inert gas, or air
7. Power requirements: Voltage, current, and total power
8. Additional features: Holes, grooves, or other special designs

Quick delivery, competitive pricing, and fully customizable solutions available.

PTC vs. NTC in PBN/PG Heaters

PTC and NTC describe how electrical resistance changes with temperature:

• PTC (Positive Temperature Coefficient):
  Resistance increases with temperature.
• NTC (Negative Temperature Coefficient):
  Resistance decreases with temperature.

For PBN/PG heaters, the resistance behavior is defined by the pyrolytic graphite heating element.

Across the typical operating range — including high-temperature applications up to ~1300 °C — PG-based heaters exhibit inherently PTC-like behavior. This characteristic is highly beneficial, as it promotes stable, predictable, and self-regulating thermal performance.

Rather than being tied to a fixed temperature threshold, the electrical behavior is a natural property of the heater material system and remains well-suited for both moderate and high-temperature operation.