Preparation and Microstructural, Structural, Optical and Electro-Optical Properties of La Doped Pmn-Pt Transparent Ceramics

Abstract

Transparent relaxor ferroelectric ceramics of the system lanthanum modified lead magnesium niobate have been investigated for a variety of electro-optic properties could make these materials alternatives to (Pb,La)(Zr,Ti)O<sub>3</sub>. However, a study that relates the properties in function stoichiometric formula, it has not been analyzed heretofore. Therefore, in this work the effect of A-site substitution of La<sup>+3</sup> in the characterization microstructural, structural, optical and electro-optical on (1-x)[Pb<sub>(1-3/2y)</sub>La<sub>y</sub>(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>]-xPbTiO<sub>3</sub> and (1-z)[(1-x)Pb(Mg<sub>1/3</sub>Nb<sub>2/3</sub>)O<sub>3</sub>+xPbTiO<sub>3</sub>]+zLa<sub>2</sub>O<sub>3</sub> has been performed. It was observed that the properties according to the stoichiometric formula and the PT had a maximum whose behavior was related to the addition of lanthanum in each stoichiometries

Bismuth ferrite-barium titanate system studies around morphotropic phase boundary

“…The density exhibits an increasing tendency as the BTO concentration is greater, also, it can be seen higher densities for the ceramic obtained from calcined powders to 900 °C. The densities are greater than 98%, which is especially suitable for electronic industry application, however, these powders presented a major quantity of secondary phases [16].…”

La-doped PMN–PT transparent ceramics with ultra-high electro-optic effect and its application in optical devices

“…The above macroscopic analysis of explaining the high EO effect is reasonable but still not comprehensive and profound. Among the references we have found so far, there is some literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16]28,29] that studies ferroelectric domains of the PMN-PT ceramics, but lacks very clear domain morphology characterization. We obtained the domain morphology and studied the domain reversal (polarization behavior) from microscopic perspective to further demonstrate instability of the intermediate ferroelectric state.…”

“…Utilizing the high EO effect of PMN-PT to design optical devices with tuning capability such as TOF is very valuable; however, application studies of the PMN-PT ceramics are rarely reported [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. To realize the application of the PMN-PT transparent ceramics in EO tunable filters, we first tested TFPF based on 2/75/25 ceramic sheet.…”

“…The understanding of the relationship among doping, domain structure, ferroelectric polarization, and EO effect is still limited though tremendous progresses have been made in the preparation of the transparent ferroelectric ceramics and the optimization of their EO effects. Besides, few works have fabricated EO modulation devices based on the PMN-PT ceramics because the preparation of the EO devices is difficult, and it is hard to obtain ultra-high EO coefficients and high light transmittance at the same time [3][4][5][6][7][8][9][10][11][12][13][14][15][16].…”