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Wurtzite Boron Nitride (w-BN) Thermal Pastes & Coatings
Next-Generation Thermal Management for Extreme Environments Unlock the future of heat dissipation with Wurtzite Boron Nitride (w-BN) . As one of the hardest materials known to science—structurally comparable to diamond—w-BN offers a unique combination of extreme thermal conductivity, high dielectric strength, and unmatched wear resistance. Whether for high-frequency electronics or heavy-duty industrial tooling, our w-BN solutions provide a stable thermal bridge where traditional materials fail.Why Wurtzite Boron Nitride (w-BN)?
While standard Boron Nitride is known for its lubrication, the Wurtzite (w-BN) phase is engineered for performance under pressure:- Extreme Temperature Resistance : Stable in inert atmospheres up to 2000°C , making it the ultimate choice for aerospace and 3D printing nozzle coatings.
- Superior Thermal Conductivity : Outperforms standard thermal pastes by utilizing the dense, diamond-like lattice of w-BN to move heat away from critical components instantly.
- Dielectric Excellence : Provides high electrical insulation, preventing short circuits in high-density PCB layouts and power electronics.
- Hardness & Wear Resistance : Acts as a protective barrier, reducing mechanical wear on industrial molds and high-speed cutting tools.
Key Applications
- Electronics & Semiconductors : Ideal for CPUs, GPUs, and power modules requiring non-conductive, high-performance thermal interface materials (TIM).
- 3D Printing (Additive Manufacturing) : A game-changer for nozzle coatings to prevent filament sticking and ensure uniform heat distribution.
- Industrial Tooling & Casting : Used as a high-temperature release agent and protective coating for molds, dies, and sensors in molten metal environments.
- Aerospace & Defense : Thermal shielding for components exposed to extreme friction and heat cycles.
Technical Specifications
- Material Phase : Wurtzite Boron Nitride (w-BN).
- Thermal Conductivity : >60 W/mK (formulation dependent).
- Dielectric Strength : >20 kV/mm.
- Service Temperature : Up to 1000°C in air; 2000°C in vacuum/inert gas.
- Chemical Stability : Chemically inert to most acids, alkalis, and molten metals.
WURTZENITE™ BORON NITRIDE, HIGH TEMPERATURE RESISTANT PASTE
Net weight: 50, 150, 500, 1000 gr.
Content: wurtzite boron nitride powder (10/7 micron), 40% in water/alcohol soluble composition.
Properties: boron nitride thermal paste, high temperature resistance and conductivity, dielectric strength (eliminates the risk of shorting out)
Thermal conductivity 2.7 watt/centimeter/°C
(Thermal conductivity of wurtzite boron nitride powder- 7.4 watt/centimeter/°C compared to silver with 4.29 watt/centimeter/°C)
Grain size: 10/7 micron (see particle size distribution diagram of wurtzite boron nitride powder)
Application:
- mold release;
- detaching (dismantling) and protective for high temperatures (up to 2000 °C);
- anti-stick coating;
- thermal conductor, including for more effective heat distribution in 3-d printers' hot blocks, reducing clogs and making removing nozzles easier;
- facilitates cutting of hard materials, extends the service life of cutting tools, provides a lower operating temperature.
How it works: composition evaporates under high temperature, leaving boron nitride on the surface, which, to some extent, is also stress resistant. On the first heating of wet surface, there is a mild burning plastic smell, which is the glycating agent evaporating, so for first indoor use ventilation is needed or let paste dry.
If smell is an issue, buy wurtzite boron nitride powder and make water mixture (1:1 by weight).
Directions of use:
- General: apply uniform layer to the surface and let it dry;
- 3-d printer cartridges (thermistor & heater) and heat breaks: coat the surface, install while the paste is still wet and let it dry before heating up;
- Nozzles: apply small amount to threads of the nozzle (do not apply the paste to the threads of the heater block), install the nozzle while the paste is still wet and let it dry before heating.
Read more how to use Wurtzenite™ Boron Nitride paste
Advantages:
- Thermal expansion of wurtzite boron nitride (according to Ioffe Institute) is approx. 1.5 lower than that of hexagonal boron nitride and other heat resistant materials. Which means higher stability of coating layer under high temperatures (<2000 °C = 3632 °F);
- Thermal conductivities of wurtzite crystal, parallel and perpendicular to the axis, are identical. Which means higher stability of thermal properties in comparison to other heat resistant materials, including such forms of boron nitride as hexagonal and cubic.
Safety Data Sheet
BORON NITRIDE HIGH TEMPERATURE RESISTANT COATING
Always available on stock, including private labels for bulk orders.
Free shipping
Contact us for combined shipping quote or bulk discounts.
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Warranty, returns and refunds Grain size conversion, selection and use of your tool |
WURTZENITE™ BORON NITRIDE, HIGH TEMPERATURE RESISTANT COATING
Net weight: 100, 500, 1000 gr., or custom packaging.
Content: WBN (wurtzite boron nitride powder, grain size 10/7 micron) in heat resistant carrier (phosphates, aluminum oxide, sulphates).
Product format: water soluble paste; does not dry out under normal outdoor conditions.
Properties of boron nitride thermal coating:
- High temperature resistance and conductivity, dielectric strength (eliminates the risk of shorting out).
- Thermal conductivity 2.7 watt/centimeter/°C
(Thermal conductivity of wurtzite boron nitride powder- 7.4 watt/centimeter/°C compared to silver with 4.29 watt/centimeter/°C)
- Dielectric constant - 5
- Dielectric loss tangent- 2 * 104 tgδ, 1 MHz
Application:
- Detaching (dismantling) and protective for high temperatures (up to 2000 °C);
- Anti-stick coating,
- Radio-transparent coating, etc.
How it works: carrier and wurtzite boron nitride hardens on the surface under high temperature and leaves a stress-resistant coating, see the video below.
The boron nitride coating was applied in 3 layers and one layer (right) on a spherical surface. After 24 hours of drying at room temperature, it was subjected to cyclic heating and cooling. The coating remained on the surface, but after temperature changes and mechanical impact, it peeled off. Molten aluminum sticks to the coating. |
| We melt pieces of copper and aluminum on a stainless steel tray with a three-layer coating of boron nitride. The pieces melted, the coating was not destroyed. |
Directions of use: apply uniform layer to the surface and let it dry.
- Under room temperature it dries approx. 24 hours, surface just should not be sticky. Heating to 150-200 degrees will speed up the drying.
- The coating may be applied with a spatula. Creates a relatively thick coating layer. Weight per 1 m²: 600-900 g.
- Add up to 20% of distilled (preferably) water by weight and stir well for using a spray gun. It is advisable to apply in several layers with a break between coatings of 2-3 hours at room temperature to let previous layer dry. Water should evaporate before use, or surface may "boil" when heated.
Weight of layer per 1 m²: ~300 g.
Once opened, use within 7 days or store in tightly closed bottle.
Advantages:
- Thermal expansion of wurtzite boron nitride (according to Ioffe Institute) is approx. 1.5 lower than that of hexagonal boron nitride and other heat resistant materials. Which means higher stability of coating layer under high temperatures (<2000 °C = 3632 °F);
- Thermal conductivities of wurtzite crystal, parallel and perpendicular to the axis, are identical. Which means higher stability of thermal properties in comparison to other heat resistant materials, including such forms of boron nitride as hexagonal and cubic.
Avoid contact with eyes and skin. In case of contact with eyes or skin - rinse with water
Boron nitride coating technical data sheet
High temperature resistant boron nitride paste
Always available on stock, including private labels for bulk orders.
Free shipping
Contact us for combined shipping quote or bulk discounts.
Download full catalog
Warranty, returns and refunds Grain size conversion, selection and use of your tool |
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