Electrostatic atomisation of a ceramic suspension

Abstract An alumina suspension, containing ∼20 vol.% of powder was pumped through a needle held at a high voltage, with respect to a point-like ground electrode, and subjected to electrostatic atomisation. The flow rate and voltage was varied between 10−9 and 10−8 m3 s−1, and 5 and 12 kV, respectively and the mode of atomisation observed was recorded to construct mode selection (M-S) maps. In the stable cone-jet mode, the jet diameter was measured as a function of flow rate and applied voltage. Alumina relics obtained in the stable cone-jet mode regime were collected and studied by optical microscopy to establish the conditions which generated the finest relics.

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