Lead lanthanum zirconate titanate PLZT

Lead iodide, 14 785-786 Lead-lag systems, 14 408 Lead lanthanum zirconate titanate (PLZT), 5 583 22 713... 

Lead lanthanum zirconate titanates (PLZT) containing 3-12 mol. % La and 5-30 mol. % Ti form a class of ceramics with important dielectric, piezoelectric and electro-optic properties. They may contain vacancies on B as well as A sites and have a remarkable facility for changing their polar states under the influence of applied fields. 

Transparent ferroelectric single crystals are traditionally used for electro-optic applications. Since the optical transparency was first discovered in lead-lanthanum-zirconate-titanate (PLZT), ferroelectric ceramics have been investigated in great depth such that, today, their characteristics allow them to compete with single crystals for certain electro-optic applications. The electro-optic properties of PLZT compositions are intimately related to their ferroelectric properties. Variations in ferroelectric polarization with an electric field, such as in a hysteresis loop, also affect the optical properties of the material. 

Ply Glass. Glass-ware, particularly for lamp shades and globes, made by covering opal glass (usually on both sides) with transparent glass of matched thermal expansion (cf. cased glass). PLZT. Lead lanthanum zirconate titanate. PLZT is an optoelectronic material (q.v.). 

Likewise, in lead lanthanum zirconate titanate (PLZT) relaxors, the substitution of La for Pb at A sites produces randomly distributed Pb vacancies. In bismuth sodium titanate (BNT [BiNa]Ti206), the replacement of Bi by Na creates charge imbalances and vacancies. Ceramics with compositions Bai, jNaxTii Nbx03 are either classical ferroelectrics (for 0relaxor ferroelectrics (for 0.075 < x< 0.055) with a diffuse transition temperature without any frequency dispersion. The relaxor behavior increases with increasing compositional deviation from both BaTi03 and NaNbOs (Khemahem et al., 2000). 

Electro-Optic Lead Lanthanum Zirconate Titanate (PLZT)... 

In order to invent and develop future practical applications, we must have a greater fundamental understanding of the properties of these versatile ceramics. This can be accomplished by measimng and characterizing their behaviour under a variety of possible operating conditions. In this chapter, the transducer properties of Lead Lanthanum Zirconate Titanate (PLZT) ceramics were presented. Their dielectric, electromechanical and optical properties have been systematically studied and could provide valuable information for engineers seeking the development or enhancement of practical applications. 

Sabat, R. G., Rochon, P. (2009a). The dependence of the refractive index change of clamped relaxor ferroelectric lead lanthanum zirconate titanate (PLZT) ceramics on AC and DC electric fields measured using an interferometric method. Ferroelectrics, Vol. 386, No. 1, pp. 105. 

Ferroelectric BaTiOj films prepared by sol-gel methods were first reported by Fukushima in 1975 [58], followed by lead titanate [60], lead zirconate titanate (PZT) [62,63] and lead, lanthanum, zirconate, titanate (PLZT) [64], Superconducting YBa2Cu307 j, and thallium-based films have been prepared using sol-gel methods by several groups [48-51]. Both ferroelectric and superconducting films share similar processing criteria with optoelectronic films described in the previous section, viz. precisely controlled stoichiometry combined with well-crystallized crack-free microstructures and absence of impurities. The possibility of orientation through physico-... 

Another class of ferroelectrics is the perovskites such as the titanates (BaTiOs, PbTiOs, SrTiOs, CaTiOs), the niobates (KNbOs, NaNbOs), the ilmentites, (LiNbOs, LiTaOs)), the ternary lead zirconate titanate (PZT), and the quaternary lead lanthanum zirconate titanate (PLZT). These materials undergo a displacive-type phase transformation at their Curie temperature. 

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