04/01/2015, RS Mines Newsletter - January 2015, issue 1.2
RS Mines Natural Crystalline Vein Graphite 99%+C vs Competitor Synthetic 99.99%C
In a recent video by Robert Murray Smith, he covered a very interesting topic covering the choice of materials when producing graphene (click on the link to watch the video). Quite rightly any type of graphite or form of carbon can be used, however the quality of the starting material has a direct effect on the quality of the end product.
Even though you may think you are buying very pure 99.99%C, chances are that the graphite is a synthetic man-made graphite which lacks key starting characteristics when compared to 99%+ natural crystalline vein graphite, ultimately providing defects and poor end application performance. Numerous clients have even stated that the minor impurities contained in RS 99%+C powder products cause no draw-backs in end performance. However for the connoisseurs, RS Mines will be releasing the final graphite powder product, RS007∞100%C, water purified, gently heated to reduce moisture, and voila, pure crystalline vein graphite with no impurities provided in a 7 micron aps form. We will be sure to let you know when the RS007∞100%C is ready for launch on the RS Mines online store.
So, what is the difference, why does natural give better results? Well, it is that big word beginning with C and comes before vein, Crystalline. Take a look at the following link to understand more about crystallinity in solids
Crystallinity implies that the sub-units that make up the crystal are arranged in a regular, repeating array within the lattice rather than being fixed in chaotic, random, disoriented locations, (Proff. Hoff 803 – www.newton.dep)
Synthetic graphite has very poor crystallinity this can be observed via X-Ray Diffraction analysis.
Below shows XRD analysis of a 99.99% synthetic graphite, peak reaching 7,000 PSD
The next XRD analysis is of RS 99%+C Natural Crystalline Vein Graphite 140-210 micron aps powder, peak reaching 18,000 PSD, far greater than the synthetic 99.99%C.
The final XRD is of the RS HOPG (highly ordered/oriented pyrolytic graphite), this type of graphite occurs in the center of the vein, it is of the highest carbon content, 99.99%+ - 100%C, highly uniform, and surprisingly flexible, which is not a usual characteristic associated with graphite...
The peak of the HOPG reaching 85,000 PSD, this outperforming the synthetic 99.99%C and the 99%+C natural crystalline vein graphite.
For the creation of graphene, there can only be one choice, 99%+ natural crystalline vein graphite. With far higher levels of crystallinity than synthetic, the end graphene product contains far fewer defects.
We hope this information has been informative to you,
Sheriozha Anthony Wijekoon
Director, RS Mines pvt ltd. www.graphite.com.co
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