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Teach you four steps to determine the purity of the graphite powder

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Teach you four steps to determine the purity of the graphite powder

Date of release:2018-06-25 Author:Qingdao xingrunda sealing materials co. LTD Click:

The purity of graphite powder is an important parameter of graphite powder. Graphite itself is a natural single crystalline mineral of carbon element, and fixed carbon content is the main index of purity of graphite powder. Before graphite powder is produced or reprocessed, various parameters should be tested, among which, purity detection of graphite powder is an important one.


The purity measurement of graphite powder is to determine the proportion of fixed carbon content of graphite powder. Because graphite has good chemical stability at room temperature, it is not easy to determine its carbon content directly. The carbon content is generally converted by the method of high temperature volatilization of the material under test. That is, the carbon content is calculated according to the value of carbon dioxide when graphite is oxidized at high temperature. Graphite powder purity calculation method, namely fixed carbon (%)=100%- ash (%)- volatile (%).


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Specific graphite powder purity detection method is: use electronic analytical balance precision said take two samples of 1 gram of graphite powder, respectively in the double cover of a known weight porcelain crucible and graphite boat, within 105 ℃ drying oven drying and weighing, and record the G1, G2, graphite powder weight. Will be equipped with double cover porcelain crucible graphite powder, in the high temperature furnace, under the 950 ℃ temperature, use stopwatch to 7 minutes, remove the cooling to room temperature inside the dryer, said its G3, graphite powder weight will be filled with graphite powder graphite boat, 950 ℃ in the high temperature furnace temperature after 90 minutes, remove graphite powder, cool to room temperature, the weight of the material is the weight of the ash G4. First, the volatile V (%) of graphite powder was calculated as (g1-g3)/ G1 * 100%, so as to obtain the calculation formula of graphite powder purity C(%)=[(g2-v-g4)/ G2] * 100%. The purity of graphite powder is a very important parameter, especially when the purity of high purity graphite powder is tested, the purity of graphite powder must meet the purity requirement of high purity graphite powder before it can be qualified.


After purchasing graphite, the concentration of graphite may need to be tested. The purity of graphite powder can be detected through the following four steps.


1.the first to use electronic analytical balance precision said take two samples of 1 gram of graphite powder, respectively in the double cover of a known weight porcelain crucible and graphite boat, within 105 ℃ drying oven baked to weighing, G1, G2 and record the graphite powder weight.


2.will be equipped with double cover porcelain crucible graphite powder, in the high temperature furnace, under the 950 ℃ temperature, use stopwatch to 7 minutes, remove the cooling to room temperature inside the dryer, said its G3 graphite powder weight.


3.containing graphite powder, graphite boat, 950 ℃ in the high temperature furnace temperature after 90 minutes, remove graphite powder and cool to room temperature, the weight of the material is the weight of the ash G4.


4. First, the volatile V (%) of graphite powder was calculated as (g1-g3)/ G1 * 100%, so as to obtain the calculation formula of purity C(%)=[(g2-v-g4)/ G2] * 100%.


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