A new electrooptic ceramic (Pb1-x
Aαx
) {Nb2(3-α)x/5(Zr
y
Ti1-y
)1-x
}O3 is proposed, where A=Ba or Sr. These ceramics sintered by the conventional hot-pressing method exhibit excellent optical chracteristics; namely their transmittances and transverse linear electrooptic coefficients being comparable to those of PLZT.
Compositional and/or temperature dependences of dielectric constants, electromechanical coupling factors and lattice parameters have been measureed to elucidate the phase bondaries of these systems.
It is also shown that lattice bacancies in the Pb sites deteriorate optical transparency considerably.
Electrical and optical properties of hot-pressed ceramics in ternary systems A(Zn1/3Nb2/3)O3–PbTiO3–PbZrO3, where A=Ba, Sr or Ca, have been studied and it has been found that optical transmittances of these ceramics (0.24 mm thick) are more than 60% at 600 nm, and that electromechanical coupling coefficients k
31 are as high as 42% with mechanical quality factors Q
M as low as 27, near the morphotropic boundary between the tetragonal and the rhombohedral phases.
The phase diagram of the ternary system Sr(Zn1/3Nb2/3)O3–Pb(Ti–Zr)O3 has been determined from X-ray analysis combined with dielectric measurements.
Investigations have been made on the hot-pressed ceramics of the solid solution xA(A1/3'Nb2/3)O3–(1-x)[(Pb(Zr
y
Ti1-y
)O3], where A=Ba or Sr, A'=Pb, Ca or Sr. Curie temperatures, lattice constants, dielectric constants and electromechanical coupling coefficients have been determined as a function of x for various systems near the tetragonal-rhombohedral morphotropic phase boundary. Polished specimens in the compositional range 0.10<x<0.20 and 0.40<y<0.60 have been found to have high optical transmittance and to show pronounced electrooptic effects. The phase diagram of the system Ba(Sr1/3Nb2/3)O3–PbZrO3–PbTiO3 has been also studied and the existence of the intermediate phase, which is likely to be antiferroelectric, has been confirmed.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.