Effect of Alumina Ceramics Surface Condition …
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Fig. 4 Changes for a contact diameter and b drop height of lead drop on alumina substrate of
different roughness at various temperatures
effect [17]. Therefore, the contact diameter of the molten lead was reduced, and the
drop height and the contact angle were increased.
Figure 5 shows the changes for adsorption work of lead drop on alumina substrate of different roughness at various temperatures. After roughening the surface
of the smooth alumina substrate, the adsorption work between the liquid lead and