How to Use Wurtzenite™ Boron Nitride Paste?


Wurtzenite™ Boron Nitride paste has high temperature resistance, conductivity and dielectric strength properties. It contains 40% of wurtzite boron nitride, unique material, manufactured with dynamic shock (explosion) synthesis, having number of advantages over traditional high pressure synthesis, including high repetition rate and enhanced process control.  

Wurtzenite™ Boron Nitride paste produces superior quality of coating layer and stable thermal properties under high temperatures (<2000 °C (<3632 °F));   applications of this paste for 3D printers, molds and processing are explained below. It is environmentally friendly coating, non-toxic and pollution-free.

 Wurtzenite™ Boron Nitride thermal paste for 3D printers

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.

Wurtzenite™ is water based paste, wet surface may affect temperature sensor’s measurements and there might be a mild burning plastic smell on first use, so let paste dry under room temperature overnight, or for 10-15 min., heating to 90 °C (94 °F), but not higher than water boiling point, 100 °C (212 °F). It's easy to clean up.

 Wurtzenite™ Boron Nitride thermal paste for melting molds

Wurtzenite™ Boron Nitride paste acts as anti stick coating or mold release agent.

Clean the surface of the protected material. Apply uniform layer to the surface and let it dry. Composition evaporates under high temperature, leaving boron nitride layer, which, to some extent, is also stress resistant. Can be applied on hot or cold surfaces
The paste may be diluted with water to make suspension, in proportion: 1 paste to 2 water, or more, depending on operation. 

 Wurtzenite™ Boron Nitride thermal paste  for  drilling, threading, cutting

Wurtzenite™ Boron Nitride paste acts as cooling and lubricating liquid for high-strength steels, Cr-Ni and Hastelloy alloys, etc., increasing working life of tools.

The paste may be diluted with water to make suspension, in proportion: 1 paste to 2 water, or more, depending on operation. 


 Wurtzenite™ Boron Nitride paste  vs  CPU thermal pastes vs hexagonal boron nitride thermal pastes 

The term thermal paste is a bit vague in relation to  boron nitride pastes. It  includes pastes, applied to release extra heat from CPU, which have working temperatures  usually between 60ºC and 90ºC, while boron nitride pastes are able to withstand working temperatures of up to 1000 ºC.  So we prefer to call our product high temperature resistant paste.  
In addition, boron nitride has a high lubricity, which facilitates the disassembling of components and  dielectric strength, which eliminates the risk of shorting out. This makes boron nitride  one of the most efficient and versatile products for high performance hotends, anti stick coatings, molds and other demanding applications.

All boron nitride pastes, presented on the market, are made from hexagonal boron nitride, material which offers high temperature resistance, conductivity and dielectric strength. Another form of boron nitride, cubic, is used mostly in abrasive products: tools and pastes.  

Wurtzenite™ Boron Nitride paste is made from wurtzite boron nitride, material which has range of advantages over hexagonal boron nitride:

- Thermal expansion of wurtzite boron nitride (according to Ioffe Institute) is approx. 1.5 lower than that of hexagonal boron nitride. 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 hexagonal boron nitride

However, hexagonal boron nitride HBN is much softer than wurtzite boron nitride WBN (Moos hardness 1.5 of HBN vs. 9 of WBN), so WBN is not recommended as dry lubricant  for some processes with friction, e.g. as engine oil additive. 

Graphite electrode, coated with Wurtzenite™ Boron Nitride paste and placed in oven(1/3 of length) under temperature of 1000 °C for 8 hours.
Area, coated with 2 mm thick layer is better protected than 1 mm thick area. Exposed area (in green oval) is almost burnt, area except coated with paste. 

High temperature resistance of 100% cotton, impregnated with Wurtzenite™ Boron Nitride paste