How To Use Four Steps To Detect The Purity Of Graphite Powder

How to use Four steps to detect the purity of graphite powder

July 24,2020.

After purchasing graphite, it may be necessary to check its concentration. The purity of graphite powder can be detected by the following four steps.

1. First, use an electronic analytical balance to accurately weigh two samples of 1 gram of graphite powder, put them into a double-covered porcelain crucible and a graphite boat of known weight, and bake them in a drying oven at 105°C to a constant weight, and record the graphite separately Powder weight G1, G2.
2. Put the double-covered porcelain crucible with graphite powder into a high-temperature furnace. At a constant temperature of 950°C, use a stopwatch to count for 7 minutes, then take it out in a desiccator and cool to room temperature, and weigh the graphite powder weight G3.
3. Put the graphite boat filled with graphite powder in a high temperature furnace at 950°C for 90 minutes, then take out the graphite powder and cool it to room temperature. At this time, the weight of the material is the weight of ash G4.

4. First, calculate the volatile content of graphite powder V (%) = (G1-G3)/ G1×100%, so that the formula for calculating the purity of graphite powder C(%)=[(G2-V-G4) /G2]×100%.

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