Abstract
An electroless nickel plating on ceramics have been studied using α-Al2O3 and piezo-electric ceramics. Etching and catalizing steps indicated important role to obtain good adhesion. Etching with hot HCl followed by sensitising with SnF2 showed highest adhesion (>120kg/cm) on the piezoelectric ceramics. Ion micro analysis and SEM photomicrographs revealed that SnF2 solution may contribute to etching and sensitising the ceramics. Conventional etching treatments had no measurable effect on adhesion of α-Al2O3 ceramics. However, sensitising with SnF2 followed by two successive activation showed good adhesion. Furthermore, adhesion was increased after heat treatment. This metallization also provided reliable electric properties.
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