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Hexagonal boron nitride suspension has a high thermal conductivity. It is not impregnated with molten metals and can be applied directly to the surface requiring protection, even if the surface is already hot. It remains consistent at high temperatures and inert to metals, glass or molten salts.
This system is unique in its properties, making it an ideal lubricant for hot parts and tools. It is a release agent and an effective coating for all very hot materials. Boron nitride remains effective up to 800°C in air and 1950°C in inert gas, making it a very good dry lubricant.
Its amazing features and ease of use have earned it the nickname "white graphite".
Specifications of boron nitride suspension
- High-temperature lubricant (1950°C)
- High-temperature release agent
- Protective coating for metals, ceramics, ceramic fibres and graphites
- Facilitates casting of molten metals (aluminium, magnesium, zinc and lead)
- Facilitates sliding of press tools at very high temperatures
- Aerosol packaging for easy and universal use
- Boron nitride (BN) is a semiconductor at high temperatures and an insulation at room temperature.
Usage of boron nitride suspension
- Clean the surfaces being coated, removing all splashes from melting or welding work
- Shake the aerosol well
- Spray about 70 cm from the surface being treated
- Move the spray slowly and evenly
- Apply in thin layers; if they are too thick the coat may crack
- It is advisable to overlay several thin layers, waiting for each one to dry before applying the next
Applications of boron nitride coating
- Thermocouple and probe protection
- Protection for casting tools
- High-temperature lubricant: foundry moulds, gasket wire drawing and more
- Electrical insulation
- Additive for silicone and resin to improve thermal conductivity
- Release agent (metallurgy, metallisation industry, plastic injection moulds and more)
- Protective layer for sintering and other applications
- Coating to reduce friction and increase chemical inertness
- BN 1012 is available as an aerosol or in a plastic bottle (5 and 10 litres)
Technical data of boron nitride suspension
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Reference |
Bottle |
Aerosol |
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Composition |
BN powder dispersed in water - Additives 2 to 4% - |
BN powder dispersed in ethanol - Additives 3% - CFC-free propellant |
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Colour |
White |
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Electrical resistivity |
2x1014 Ω |
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Friction coefficient |
BN/BN (air) 0.18 BN/Steel (air) 0.18 BN/Stainless Steel 0.2-0.4 |
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Density |
1.12 to 1.14 g/cm² |
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Max. usage temperature |
800°C in air |
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1950 °C in inert gas |
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Viscosity |
11 to 13 seconds (cut Ford No. 4) |
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Flame resistant |
Yes |
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Water resistant |
Yes |
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Boron nitride aerosol
Boron Nitride Suspension in container
FAQs that can help you in this category
Final Advanced Materials' Duralco high-temperature paints provide improved resistance to corrosion and adverse weather. The choice of paint will depend on the usage conditions and the material of the medium requiring protection. When the surface has been descaled, derusted, cleaned and degreased you can apply the paint using a brush or spray gun. Specifically: 2 thin layers are preferable to 1 thick layer.
If you require thermal resistance up to 650°C in a humid and/or saline atmosphere, the aluminium-based paint produced Final Advanced Materials offers would be a great solution. However, if the temperature requirement does not exceed 800°C, the Duralco 230 paint, which is stainless steel-loaded, would be more effective.
The ceramic coatings (BN or graphite) offered by Final Advanced Materials have low surface energy, which limits the adhesion of molten metals (Al, Zn, Cu, etc.). They reduce wetting and facilitate stripping. Their thermal stability and their chemical inertia improve the lifetime of the tools used. They also reduce metal contamination and wear of tools.
The coatings' maximum working temperature will depend on the gaseous environment. Temperature stability is limited to 450°C for graphite and 850°C for boron nitride in air or an oxidising atmosphere, and to over 1,000°C in a vacuum or inert gas.
The BN coatings offered by Final Advanced Materials can be applied with a spray, a brush or by dipping. Surface preparation (degreasing, roughness Ra 1.6–3.2 µm) is essential to provide a better adhesion. Drying is carried out at ambient temperature. The typical thickness is 10 to 50 µm. The thinnest possible layers should be used for application. Let each layer dry fully before applying a new one. If a layer is too thick it will have a lower resistance, and a higher risk of delamination or cracking. BN provides excellent thermal stability (as high as 800/900°C in air and 1,800°C in a vacuum or inert gas).
The anti-adhesion coatings offered by Final Advanced Materials provide very effective results in the glass industry. Applying a boron nitride-based product will result in a very low surface energy, an anti-adherent effect, high chemical inertia for silicate glasses, and high temperature resistance (≈ 900°C in air and up to 1,800°C in a controlled atmosphere). This coating will lead to a reduction in adhesion, decreased material transfer, and minimal surface marking.