Jinx wrote:
>
> I've got a few piezo discs to rework and need to find the best
> way to attach a wire to the ceramic centre. The brass outer
> ring is OK but solder (60:40 5-core) won't stick to the ceramic.
> Any suggestions ? I could stick the wire down with aluminium
> tape or silcone but that's not an ohmic bond and I expect it
> would fail pretty quickly


I've normally scratched up the surface and soldered them.
Why is there no metal coating on the middle of the disc?
Sounds pretty unusual to me. :o)
-Roman

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