抄録
The wetting of (Pb, La) (Zr, Ti)O3 ceramics with various electrode metals were studied by measuring the contact angle in a vacuum atmosphere. Two kinds of PLZT were used: x=0.07, y=0.35, and x=0.12, y=0.60 in (Pb1-x, Lax) (Zr1-y, Tiy)O3. The metals studied were Ag, Al, In, Sn, Bi and Cu. The metals forming thermodynamically unstable oxides showed low contact angles: 98° with Ag and less than 90° with Cu. The contact angles were dependent on the composition of PLZT. The other metals indicated the obtuse contact angles as large as 140° since the metals forming the stable oxides can not move by being protected with the oxide. The wettability of a metal on the oxide ceramics can be predicted by the redox reactions of metal and a certain element in the ceramics. In and Sn were bonded with the PLZT but not with BaTiO3.
