Graphite powder has many excellent properties: high tem […]
Graphite powder has many excellent properties: high temperature resistance, self-lubrication, light weight and high density. In industrial production, graphite powder is widely used, and graphite powder can be used in many industries. Since so many industries need to use graphite powder, so the purchase and selection method of graphite powder is a key thing for many manufacturers who need graphite powder. Let me talk about the detection method of graphite powder:
How to check the concentration of graphite powder after purchasing it? You can use the following four steps to check the purity of graphite powder.
1. Weigh two graphite powder samples with a precision electronic scale, 1 gram each, put them into a double-cover porcelain crucible of known weight and a graphite boat, bake them to a balanced weight in a 105°C drying oven, and record the graphite separately Powder weight G1, G2.
2. Put the double-covered porcelain crucible with graphite powder in a high-temperature furnace, at a constant temperature of 950°C, use a stopwatch to count to 7 minutes, take it out and cool it to room temperature in a desiccator. Weigh its graphite powder weight G3.
3. After the graphite boat containing the graphite powder is kept at a constant temperature of 950°C for 90 minutes in a high-temperature furnace, the graphite powder is taken out and cooled 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 the purity of graphite powder C (%) = [(G2-V-G4) /G2]×100% or more is the detection method of graphite powder. If the purity of graphite powder does not meet the requirements, it will affect the quality of the product.