ELECTRIC MICROSTRUCTURE OF CORUNDUM

摘要

A furnace has been constructed which permits microscopic observation of a 1 diameter probe, up to about 700℃, as it is manipulated over the surface of a test specimen.nConduction current passing between the probe and a metallic coating on the under side of the crystal was measured. W, Pt, Cu, and Al probes and evaporated Ag, Co, or painted and fired “Platinum Bright” coatings were used.