Graphite is one of the most interesting elements found on the Earth. It is found naturally in its mineral form and produced in synthetic processes. The earliest use of graphite dates back to primitive man, who used it to draw on cave walls. Egyptians also used it to decorate pottery. During the Middle Ages, Graphite was used as a refractory to line molds to make smoother cannon balls, which could be fired farther. Throughout history, Graphite has been confused with other minerals, especially galena and molybdenum. Names like plumbago and black lead have been used to describe the mineral, and over time, the term graphite (meaning "to write") was finally used to describe this mineral. Graphite is gray to black, opaque with a metallic luster. It is a fairly soft crystalline form of carbon with a Mohs hardness of 1 to 2. Graphite is stable and chemically inert at normal temperatures and has a very high sublimation point without air. In its pure form, it is odorless, tasteless, and non-toxic. It has a hexagonal, multi-layer planar microstructure which gives it several unique characteristics, the sum of which is not found in any other single material. The layers are alternating and honeycomb in structure and are spaced at 1.42 angstroms apart (strong bonds), with 3.354 angstroms between layers (weak bonds). Graphites, including graphite powder form, also possess primary and Secondary Properties that make them valuable in many applications. As you can see below, the Primary Properties of Impurities, Graphitization, Particle Size Distribution, and Morphology, in combination, determine the Secondary Properties of Lubricity, Reactivity, Resiliency/Strength, and Conductivity. If you are looking for high quality, high purity, and cost-effective Graphite, or if you require the latest price, please feel free to email contact mis-asia.