Cooler Under Pressure

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When machinery runs hot, every molecule of friction counts. Traditional lubricants lose viscosity, oxidize, and break down under thermal load. To keep equipment running longer and cooler, formulators are turning to Boron Nitride (BN) — the “white graphite” — as an advanced thermal-conductive and electrically insulating filler for next-generation high-temperature greases and specialty lubricants.

Hexagonal Boron Nitride (h-BN) is a ceramic material renowned for its unique combination of high thermal conductivity, low friction, and excellent chemical stability. Unlike graphite or metal oxides, BN remains electrically insulating, making it ideal for lubricants used in precision electronics, aerospace, and powertrain systems.

Key Advantages:

Outstanding thermal conductivity: 30–300 W/m·K (grade dependent)
Superior lubrication: Lamellar structure similar to graphite ensures low friction even under high load
Electrically insulating: Safe for use near sensors, bearings, or electric drives
High oxidation resistance: Stable up to 900 °C in inert atmosphere
Chemically inert: Compatible with synthetic esters, PAOs, silicones, and fluorinated oils

How BN Functions as a Cooling Filler

In high-temperature greases and lubricants, heat buildup leads to viscosity loss and oxidation.
By dispersing fine Boron Nitride particles, formulators can:

Dissipate Heat Rapidly
BN particles create micro-thermal pathways, carrying heat away from contact surfaces.
Reduce Friction Coefficient
Their plate-like structure allows easy shear between layers — lowering wear and energy loss.
Enhance Load-Carrying Capacity
The solid film formed under pressure acts as a secondary lubrication layer.
Improve Long-Term Stability
BN resists oxidation and maintains lubricity where conventional PTFE or MoS₂ degrade.

Applications in High-Temperature Lubricants

Segment	Function of BN Cooling Filler
Aerospace & Turbine Oils	Improves thermal conductivity and oxidative stability under continuous high load.
Automotive & EV Bearings	Reduces friction and prevents electrical arcing near sensors and motors.
Industrial Gear & Chain Lubes	Enables operation beyond 250 °C with minimal viscosity breakdown.
Metal Forming Pastes	Provides anti-stick and release performance under extreme shear and temperature.
Silicone-based Greases	Prevents thermal runaway and extends service intervals in precision instruments.

BN Grades Offered by Geocon Products

Grade	Form / Particle Size	Recommended Use
GPBN-480	Fine powder (~1 µm)	Silicone and fluorinated greases for high-speed bearings
GPBN-1013	Medium powder (3–10 µm)	PAO & ester oil-based greases for automotive & industrial use
GPBN-1520	Coarser filler (15–20 µm)	Solid-film lubricants, pastes, and metal forming compounds

(Custom micronized and surface-treated BN grades available for specific base-oil chemistries.)

Formulation Tips

Dosage: 1–10 wt % depending on required thermal conductivity and viscosity.
Dispersion: Use high-shear mixer or bead mill; pre-wet BN with base oil or dispersant.
Synergy: Combine BN with graphite, PTFE, or MoS₂ for hybrid thermal-lubricant performance.
Base Oil Compatibility: BN is compatible with PAO, synthetic ester, silicone, PFPE, and perfluoropolyether systems.

Performance Benefits

Cooler operation — 15–30 % lower working temperature under equivalent load
Extended service life — reduced oxidative degradation of base oil
Lower wear & noise — smoother lubrication film formation
Enhanced safety — electrical insulation prevents shorting or sparking
Environmentally stable — non-toxic, non-reactive, and halogen-free

Packaging & Supply

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Geocon Products

For technical guidance or samples of GPBN Cooling Filler Series, contact our formulation team.