Observations on Fromation of "Cleavage" at Interface Between Glaze Resistor and Termination

A low-power bench microscope was modified to facilitate direct observation of fusion of paints to make glaze resistors during heating cycles which simulate production and experimental firing cycles. Using this tool, the formation of "cleavage" (clear line of separation between noble-metal glaze resistor and screened-on termination) was studied. The mode of formation of "cleavage" and possible sources of causative agents are discussed.