What is boron powder? Applications of Nano Boron Powder and Ultrafine Boron Powder

What is boron powder (single boron) Boron powder, also known as monomeric boron and amorphous element boron, CAS RN is 7440-42-8, appearance is light brown to gray-black invisible powder, melting point is 2300℃±2℃, atomic weight is 10.81, and temperature is 2550℃, specific gravity is 2.34-2.37, insoluble in water, hydrochloric acid, ethanol and ether, soluble in