Why is Hexagonal Boron Nitride More Compatible with Thermoplastics?

(Why is Hexagonal Boron Nitride More Compatible with Thermoplastics?)

What is hexagonal boron nitride?

White graphite refers to another name for hexagonal boron nitride. White
graphite is the simplest boron nitrogen polymer. Similar to the hexagonal carbon
mesh in graphite, nitrogen and boron in hexagonal boron nitride also form
hexagonal mesh layers, which overlap each other to form crystals. The crystal is
similar to graphite, with diamagnetism and high anisotropy, and the crystal
parameters are also quite similar. Boron nitride is mainly used in refractory
materials, semiconductor solid-phase doping sources, structural materials for
atomic stacks, packaging materials for anti-neutron radiation, rocket engine
constituent materials, high-temperature lubricants and mold release agents.
Hexagonal boron nitride is a white crystal with a melting point of nearly
3000°C, high temperature resistance, extremely stable chemical properties,
strong acid corrosion resistance, and high electrical insulation properties.

Why is hBN more compatible with thermoplastics?

In the past, in order to improve certain properties of plastics or reduce the
cost of plastic preparation, low-cost minerals or glass fillers such as barite,
calcium carbonate and kaolin were often added. However, these fillers are not
suitable for higher-level thermal conductivity plastic products due to their
poor ability. In addition, metal, carbon and graphite fillers are not suitable
for applications requiring electrical insulation performance. Combining various
requirements, ceramic fillers It has become a standard choice. The common
thermally conductive insulating ceramic fillers include hBN (hexagonal boron
nitride), AIN, Si3N4, SiC, Al2O3, and ZnO, etc. The hBN has the lowest density
and low friction coefficient. In addition to the excellent insulation and
thermal conductivity of thermally conductive fillers, the impact of its addition
on the processing of thermoplastics is also an important component that we
cannot ignore.

The addition of hBN can make the plastic have a low thermal expansion
coefficient, make the size of the plastic component more stable, and help meet
the needs of applications with strict size requirements. At the same time, for
composite materials, the compatibility between different components is also an
important assessment condition. After proper surface treatment, hBN can be
compatible with a variety of resin systems to obtain better performance and more
stable performance. plastic products.

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(Why is Hexagonal Boron Nitride More Compatible with Thermoplastics?)