You are, of course, correct. However, "CMC" is frequently used for both "Ceramic Metal Composites" and "Ceramic Metal Composites".
IF piezoelectric ceramic composites were used in a missile, they would probably be in the form of a small chip or slab that produces a spark when struck. (Think of the 'squeeze trgger to light' butane gadgets used for lighting gas grills, etc.) Such a device could conceivably be used to trigger the launch or to trigger the warhead upon impact.
In either case, I don't see how a significant number of piezoelectric CMC "pellets" would be involved in a single missile.
BTW, I probably have as many questions (and doubts) about the govt story on Flt 800 as 'most anyone, and I am definitely interested in the info that a significant number of CMC pellets were found embedded in corpses. And, I expect that a missile may have been involved.
I just can't see a connection between a significant number of CMC pellets (piezoelectric or otherwise) and a missile...
Please keep digging; the pony must be in there somewhere!
TXnMA (No Longer!!!)