HDA series are high-density Boron Nitride agglomerated particles. The tap density can reach 0.7g/cm³. The products contain single crystal Boron Nitride which is compacted and densified to materials with very low porosity. At present, HDA series comes in two specifications. One is a larger agglomerate with increased Boron Oxide content and D50 of about 210 μm. Another one is smal agglomerated product with low Boron Oxide content and D50 of about 22 μm.