Quadratic Electro-Optic Effect in the System Pb(Zn_1/3Nb_2/3)O₃-PbTiO₃

Abstract

Authors propose the use of an ultrasonic transducer to achieve a passive safety system for a collision using a corner sensor. However, the sensitivity of the transducer decreases owing to Doppler shift in the case of a travelling car. On the contrary, authors also propose a resonance control method for the transducer using a generalized impedance converter (GIC) circuit. In this study, the resonance control frequency method is used to correct the sensitivity of the transducer. In the sensitivity control, the input impedance control of the GIC circuit is tried using a voltage-controlled resistance. The automatic sensitivity correction control is expected to be realized by a combination of the GIC circuit and frequency-voltage (F/V) converter. As a result, the sensitivity of a Langevin transducer with a GIC circuit as a receiver is slightly improved, compared with that of a retailed transducer. Moreover, the resonance frequency of the transducer can be controlled in the range of about 3 kHz using the GIC circuit and F/V converter.

Relaxor-based ferroelectric single crystals: Growth, domain engineering, characterization and applications

“…Early in 1973, the quadratic EO coefficients of PZN-PT single crystals have been characterized in the temperature region above the Curie temperature [385]. With the increase in PbTiO 3 content, the quadratic EO coefficient g increases.…”

Growth and optical properties of 0.62Pb(Mg1/3Nb2/3)O3-0.38PbTiO3 single crystals by a modified Bridgman technique

“…We can see that the extinction ratio of the crystal changes only slightly from 20 C to 70 C. The high extinction ratio is independent of temperature, which is an important property for use in optical devices. 0.62PMN-0.38PT single crystal, like other ABO 3 -type perovskite compounds, such as PMN, PMNT, PZNT family, has a common oxygenoctahedra structure that determines the basic energy levels in the crystal [16][17][18]. In Pb(B 1 B 2 )O 3 ferroelectric relaxors, the nanoregions, domain structure and B-site cation structure have influences on the transmittance as well as on the dielectric and piezoelectric behavior of the crystal.…”

High temperature lead-free relaxor ferroelectric: Intergrowth Aurivillius phase BaBi2Nb2O9–Bi4Ti3O12 ceramics

“…5,6 Consequently, a great deal of effort has recently been put into exploring new RFE materials with higher T m value. [5][6][7][8][9][10][11][12] RFE exist in the different crystal structures that host ferroelectricity, including perovskites, tungsten bronzes, rutile structure, and Aurivillius phase. 7,8 In perovskites, RFE behavior occurs predominantly in lead-based complex compositions with the general formula Pb͑B 1 B 2 ͒O 3 , ͑B 1 =Mg 2+ ,Zn 2+ ,Ni 2+ ,Sc 3+ ..., B 2 =Nb 5+ ,Ta 5+ ,W 6+ ...͒ or lanthanum-substituted PbZr 1−x Ti x O 3 ͑PLZT͒.…”

“…3 Among leadbased perovskite compounds, Pb͑Zn 1/3 Nb 2/3 ͒O 3 has the highest T m of 140°C ͑100 kHz͒. 9,10 To increase the piezoelectric activity and T m of RFE, lead-based perovskite, ferroelectric solid solutions, especially those containing PbTiO 3 as one of the end components, have been developed. Their superior piezoelectric properties can be observed in compositions close to the morphotropic phase boundary ͑MPB͒.…”