Electrothermic compositions

Abstract

According to the invention there is provided an electrothermic composition comprising: at least one carbon component; at least one graphite component, and an optional binder or carrier, wherein the carbon, graphite, and/or their ratio are selected such that that the composition or a material formed from the composition has a thermal coefficient of electrical resistance (TCR) of about zero or is substantially stable over a predefined temperature range. The invention further relates to a product or a material produced or formed by the electrothermic composition. The invention additionally relates to a method of preparing an electrothermic composition comprising the steps of: (i) selecting a predetermined ratio of at least one carbon component and at least one graphite component such that the composition is electrically conductive, electrothermic and will have a TCR of about zero or is substantially stable over a predefined temperature range; and (ii) preparing the composition by mixing said at least one carbon component and said at least one graphite component, optionally in a suitable binder or carrier. Alternative embodiments relate to an electrothermic composition comprising: at least one carbon component; at least a second carbon component; and an optional binder or carrier; wherein the first carbon component, the second carbon component, and/or their ratio are selected such that that the composition or a material formed from the composition has a TCR of about zero or is substantially stable over a predefined temperature range.

Dependencies are inferred from the claim text.