Carbon Conductive Paste

Carbon Conductive Paste is a highly viscous formulation ofmicro-graphite in a liquid carrier (some would say "solvent", butit is not really a solvent) for the preparation of porous samplesdestined for x-ray analysis (EDS). For samples like paper, thinfibers and fabrics, the higher viscosity of the Carbon ConductivePaste relative to the SPI Supplies Carbon Conductive Paint, resultsin far less potential for artifacts due to solvent exposure andsolvent "wicking" up into the sample to be studied. Of courseanother alternative to consider, when mounting these kinds ofsamples, would be the popular double sided conductive adhesivetapes, sheets, anddiscs.碳导电膏是在液体载体（有些人会说“溶剂”，但实际上不是溶剂）中的高粘度微石墨制剂，用于制备用于X射线分析（EDS）的多孔样品。对于纸张，细纤维和织物之类的样品，相对于SPISupplies碳导电漆，碳导电膏的粘度更高，由于溶剂暴露和溶剂“芯吸”到待研究的样品中，导致伪影的可能性大大降低。。当然，在安装这些样品时，可以考虑的另一种选择是流行的双面导电胶带，薄片和光盘。

Conductivity considerations:
Obviously, the Carbon Conductive Paste is less conductive than theSPI Supplies Silver Paste Plus. However, when used in the SEMapplications, and with micromicro amps of current, the differencein conductivity between the silver paste vs. carbon paste is farless than one might otherwise expect. What we mean is, while thesilver paste does give a better result, most users find theincremental improvement is less than one might expect. We do not atthe present time have actual resistivity values for thisproduct.

Product purity:
 
The Carbon Conductive Paste, while not spectroscopically pure, isnevertheless pure enough so that for most users, one does not seeany impurity elements from the paste, unless the electron beam isdirectly focused onto the paste itself.

 

The Carbon Conductive Paste, when analyzed for impurities, showsless than 10 ppm ash and in a majority of cases, no impurities aredetectable energy dispersive spectroscopy (EDS) systems. Weconsider the critical impurities in this kind of product, from aproduction standpoint, to be silicon and sulfur and we can reportthat both are below the 10 ppm level. Other impurities, so far aswe can determine, are all at or below ppm levels in the singledigits.