Wurtzite boron nitride demonstrates excellent heat resistance properties, which is well known. But the main advantage of this material are the highest (among similar heat resistant materials) stabilities of coating layer and thermal characteristics. This makes wurtzite boron nitride the most appropriate material for coating of melting molds, 3D printers parts and more.
Below is an interesting example of heat resistance properties of 100% cotton, impregnated with wurtzite boron nitride paste. Apparently impregnated cotton remains solid for a much longer time, than pure fabric.
Similar experiment for graphite electrode from National, USA., dimensions 12'x0.8'. The electrode was coated with boron nitride paste and left in oven under temperature of 1832 °F for 8 hours. Oval shows area, which was placed in furnace. As you see, protected area is also burnt, but much less than the rest of the electrode.
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