This test method is used to determine the electrical conductivity of silica. This test method is suitable for characterizing rubber-grade silicas.
Keywordssilica; electrical conductivity
The electrical conductivity of silica is related to both the adsorbed water and the hydroxyl groups on the surface of the precipitated, hydrated silica. A specific quantity of the sample is boiled in distilled or deionized water. After cooling down to room temperature, the suspension is diluted to 4 % mass per volume (m/V) and its temperature is adjusted to 20 C with a thermostat. The electrical conductivity is measured using a conductivity meter and a conductivity cell.Back to Top