C - Chemistry – Metallurgy – 09 – K
Patent
C - Chemistry, Metallurgy
09
K
31/132
C09K 3/00 (2006.01) C04B 35/491 (2006.01) G02F 1/00 (2006.01)
Patent
CA 1090556
ABSTRACT An optical material having an electrically variable birefringence value consist of a ferroelectric ceramic of the composition Pb1-xLax(ZryTiz)1-x/4O3 where x is between 7.5 and 8 atomic percent and where the ratio y/z is between 70/30 and 74/26.
253956
Bye Keith L.
Hardtl Karl H.
Keve Edward T.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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