Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1980-11-13
1982-05-18
Herbert, Jr., Thomas J.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
29 2535, 252 629, 310358, 427100, B32B 516, B05D 512, B32B 1508, H04R 1700
Patent
active
043305938
ABSTRACT:
PZT/polymer composites and a simplified method of their fabrication are dribed. Commercially available PZT Pb(Zr, Ti)O.sub.3 powder is thoroughly mixed with a binder such as polyvinylalcohol and polymethyl methacrylate (PMM) spheres and pressed into pellets. The binder and PMM spheres are burnt out by heating pellets slowly and the porous pellets so obtained are sintered by heating them in closed high-purity alumina crucibles and lead zirconate as a source of lead is added thereto. The highly porous pellets thus obtained are impregnated with a suitable polymer such as silicone rubber elastomer or vinylcyclohexene dioxide epoxy.
REFERENCES:
patent: 4076892 (1978-02-01), Fennimore et al.
patent: 4227111 (1980-10-01), Cross et al.
Biggers James V.
Schulze Walter A.
Shrout Thomas R.
Durigon A. P.
Herbert, Jr. Thomas J.
Lall P. C.
Sciascia R. S.
The United States of America as represented by the Secretary of
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