Momentive Performance Materials’ boron nitride (BN)
powder grades HCR48, HCJ48, and HCM are large, high- density agglomerates, of ~10 μm crystals, with average particle sizes between 175-275 μm and tap densities of ~1 g/cm3. These features, combined with low average surface areas, give powders that flow readily, withstand harsh processing, and have outstanding thermal characteristics.

HCR48
HCR48 has an average particle size of 250 μm and is the highest density (hardest) grade offered by Momentive Performance Materials. It has higher oxygen and soluble borate levels than most grades, which limits its performance
in high-temperature (>550° C) applications.

Applications
These grades are ideal for use in thermal spray
applications as well as metal-matrix and ceramic
composites for wear applications such as
high-performance brake linings. They are
also used in heating elements and adhesives,
pastes, and potting compounds with increased
thermal conductivity and high electrical resistivity.

Momentive Performance Materials produces over 75
standard and custom grades of BN powders to meet
a wide range of application requirements, and has
over 40 years of expertise in the synthesis and
refinement of boron nitride powders.