TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Process: The process further comprises: heating the amorphous boron nitride to 1200-1800 degrees C under an atmosphere of nitrogen and/or ammonia, thus providing hexagonal boron nitride and/or turbostratic boron nitride; and heating hexagonal boron nitride and turbostratic boron nitride to 300 degrees C under a light gas, and streaming heavy gas over hexagonal boron nitride and turbostratic boron nitride under hermitic conditions. The amorphous boron nitride is ground to particles smaller than 2-3 microns before heating it. The step of heating is performed when 55-75% (preferably 40-45%) of the initial weight of the boric acid remains in the reaction vessel. The heating of boron imide to 500-600 degrees C provides amorphous boron nitride. The remaining boric acid, boric anhydride and other contaminants are removed from turbostratic boron nitride and hexagonal boron nitride by washing with water and/or alcohol. The washing with water is performed until the remaining amount of boric anhydride is less than 0.5 wt/wt.%. The washing with alcohol is performed until when the remaining amount of boric anhydride is less than 0.1 wt/wt.%. Preferred Components: The boric acid is boracic acid, pyroboric acid or metaboric acid.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The carbamide is urea. The weight ratio of carbamide and boric acid reactant is 3:4 to 2:1 or 1-1.5:1).    TECHNOLOGY FOCUS - POLYMERS - Preferred Process: The ammonium polyborate reacts with the ammonia when heated to 500-600 degrees C to form amorphous boron nitride. Preferred Components: The ammonium polyborate is formed from ammonium tetraborate. EXAMPLE - Boric acid (300 g) was mixed with carbamide (600 g) at 250 degrees C for 2 hours and heated to 500 degrees C for 0.25 hour to give amorphous boron nitride (120 g). The reaction vessel was then heated to 1200 degrees C for 3 hours in a nitrogen atmosphere to give turbostratic boron nitride.