Abstract: A method of preparing activated carbon (AC) from seed shells of Balanites aegyptiaca comprising: comminuting the seed shells to form a powder having a particle size of about 50 mesh to about 300 mesh; admixing the powder with solid state potassium hydroxide (KOH) at a ratio by weight of KOH powder of about 1.5:1 to about 2.5:1; forming a slurry of the obtained mixture in water under stirring for a duration of from about 1 hour to about 5 hours; drying the obtained slurry and deagglomerating the residual solid fraction thereof; subjecting the deagglomerated solid fraction to carbonization by heating said fraction under an inert atmosphere; and, cooling and neutralizing the product of said carbonization.

Abstract: The present disclose provides a sol-gel paste composition of matter that is provided for application to a substrate to form an electrically conductive coating which can be used, for example, as a resistor in a thick-film resistive heater, which a positive temperature coefficient of resistivity (PTCR) as a consequence of the electronic properties of the electrically conductive semiconductors used in the resistor layer and which exhibits self-limiting behavior at elevated temperatures. The composition includes a sol gel solution in which up to 90% by weight (wt. %) of the solution is comprised of conductive and insulative powders in a uniform stable solution.

Abstract: The present disclose provides a sol-gel paste composition of matter that is provided for application to a substrate to form an electrically conductive coating which can be used, for example, as a resistor in a thick-film resistive heater, which a positive temperature coefficient of resistivity (PTCR) as a consequence of the electronic properties of the electrically conductive semiconductors used in the resistor layer and which exhibits self-limiting behavior at elevated temperatures. The composition includes a sol gel solution in which up to 90% by weight (wt. %) of the solution is comprised of conductive and insulative powders in a uniform stable solution.