Graphite /98 Crystalline allotrope of carbon,most stable form Characteristics:1.thermally and chemically stable 2.thermally and electrically conductive 3.lubricating Origin:graphite mines in Heilongjiang,Shandong Preparation:purification of graphite mine: >1)chemical:NaOH reaction neutralize using HCI >2)physical:annealing at high T without oxygen https://b2b.hc360.com/viewPics/s https://b2b.hc360.com/viewPics/s http://www.99114.com/pi upplyself_pics/80332485791.html upplyself_pics/80332485791.html cture/598650.html 4http://www.99114.com/pi cture/598650.html https://b2b.hc360.com/viewPics/s upplyself_pics/80332485791.html https://b2b.hc360.com/viewPics/s upplyself_pics/80332485791.html 4 Graphite • Crystalline allotrope of carbon, most stable form • Characteristics: 1. thermally and chemically stable 2. thermally and electrically conductive 3. lubricating • Origin：graphite mines in Heilongjiang, Shandong • Preparation：purification of graphite mine：  1) chemical：NaOH reaction → neutralize using HCl  2) physical：annealing at high T without oxygen