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  2. Technical Solutions
  3. Particle Shape Considerations

Particle Shape Considerations

In its simplest form, hBN powders are made up of platelets. At Saint-Gobain Boron Nitride, we have the ability to produce platelet powders with an average diameter of 2 to 30 μm with a controlled size distribution. We also offer engineered powder particles in the form of agglomerates, with average sizes from about 50 to 500 μm. Saint-Gobain Boron Nitride offers agglomerates as low density, high density or spherical particles. In general, these powders have improved flowability and more isotropic properties as compared to platelet powders. Scanning electron microscope (SEM) images are shown below to display typical particle appearance for each type of powder.

Platelets

Agglomerates

Platelets
 
High-Density Agglomerates | Saint-Gobain Boron Nitride
High Density
Spherical Agglomerates | Saint-Gobain Boron Nitride
Sphericals

 

SEM, Boron Nitride and Porosity | Saint-Gobain Boron NitrideAgglomerates are made by firing consolidated particles of fine hBN powder at high temperatures. Due to hBN crystal structure, these particles do not densify like typical ceramics during firing. Rather, the platelets grow and form an interlocking, porous network like the SEM image (right).

When choosing which powder type to use, there are many factors which should be considered. Our product managers and technical experts can work with you to help select the best powder for your application.

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