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Wetting properties of silver on Barium titanates (hereinafter, BT), on reduced BT (BaTi03-3) and on reoxidized BT (BaTiO3-3+x) of reduced BT were studied using furnace with a telescope to measure contact angle in vacuum with elevating temperatures. The effects of surface roughness, sintered density, and the surface-oxidized conditions of the ceramics were examined and discussed. In addition, Ag containing borosilicate glass was also investigated to discuss the effects of the glass on the wetting properties on BT. As a result, the followings were clarified: The contact angles were reduced depending upon the sintered densities and surface roughness of ceramics, and oxidized layers on the ceramics affected to reduce the contact angles as well. The mechanism of adhesion of Ag on the ceramics was also discussed. The glass frits were thought to wet the ceramics regardless of sintered density and surface roughness.

Effects of Surface Condition and Sintered Density on the Wetting of BaTiO3 by Ag.