Radiation effects in PLZT and PSN ceramics

Sternberg, A.; Krumina, A.; Sprogis, Arturs; Weber, H.W.; Klima, H.; Schwabl, Herbert; Dindun, S.; Ulmanis, U.

doi:10.1080/00150199208223426

Cited by 5 publications

(6 citation statements)

References 7 publications

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“…Since E ib is commonly attributed to the preferred alignment of acceptor-oxygen-vacancy defect complexes [10], it is reasonable to assume that the irradiation has an effect on the defect states, likely altering the polarization-pinning behavior as inferred from changes in the bias field. Irradiation-induced bias field was reported in PLZT for doses of/above 5 × 10 17 neutrons•cm −2 [17,18].…”

Section: Resultsmentioning

confidence: 97%

“…above the temperature of the maximum permittivity. An annealing step could eventually contribute to the relaxation of either irradiation-induced defects or irradiation-altered Mn-induced defect complexes [17]. The pristine and level-2 irradiated Mn-1 samples were annealed at 450 • C for one 1 h and slowly cooled to test this hypothesis.…”

Section: Resultsmentioning

confidence: 99%

“…Neutron irradiation reduced the dielectric permittivity and (high-field) polarization and increased the coercive and internal bias fields. The original polarization state of the materials could be restored by annealing to a few 100 • C (depending on the dose), which was related to the relaxation of radiation-induced defects [15][16][17][18]. Brewer et al noted that manganese doping of PZT films that resulted in a decreased polarization response compared to the undoped films enhanced their gamma-radiation tolerance for doses up to 10 5 Gy [19].…”

Section: Introductionmentioning

confidence: 99%

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Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg_1/3Nb_2/3)O₃–0.1PbTiO₃ ceramics

Sarkar,

Šadl,

Jazbec

et al. 2023

J. Phys. Energy

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The influence of neutron and gamma irradiation on the low- and high-field dielectric and electrocaloric properties of Mn-doped 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 (PMN–10PT) ceramic is studied. Upon exposure to neutron fluences of up to 1017 cm-2 and gamma-ray doses of up to 1200 kGy the Mn-doped PMN–10PT exhibits a lower saturated polarization, increased internal bias field and reduced electrocaloric temperature change. In comparison, the respective properties of the undoped PMN–10PT remain almost unchanged upon exposure to neutrons and gamma rays. In Mn-doped PMN–10PT, the acceptor-oxygen vacancy defect complexes, introduced via doping, contribute to the lowering of the threshold radiation dose that the material survives without noticeable changes in properties. Radiation-induced degradation of the electrocaloric response of Mn-doped PMN–10PT can be partially healed by annealing at 450 °C. The study provides guidance for designing electrocaloric ceramic materials for solid-state cooling applications in environments of high ionizing radiation, such as the medical field or space technologies.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg_1/3Nb_2/3)O₃–0.1PbTiO₃ ceramics

Sarkar,

Šadl,

Jazbec

et al. 2023

J. Phys. Energy

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“…The published results suggest that in most cases of disordered and amorphous materials the Urbach law (3) does not hold [2], the fundamental absorption edge being described by (2) [7,8). Comparing expressions (2) and (3), one obtains AE = kT/O'(I').…”

Section: Extinction Absorption and Scattering Coeflicientsmentioning

confidence: 90%

“…The spectra of optical transmittance T(l) [1], optical density D(l) and extinction X(l) [2] are often used to specify the optical properties of PLZT ferroelectric ceramics. Considerable light scattering, especially in the shortwave part of the visible spectrum, is due to static and dynamic optical heterogeneities --vacuum pores [1] and microregions of the FE phase [3], respectively.…”

Section: Introductionmentioning

confidence: 99%

Laser-Calorimetric Study of Fundamental Absorption Edge in Pb,La(ZrTi)O3 (PLZT) Perovskite Ceramics

Knite

Krumins

Millers

2000

Defects and Surface-Induced Effects in Advanced Perovskites

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Abstract. The values of the light absorption coefficient of PLZT 10/65/35 ceramics at selected wavelengths have been obtained by laser calorimetric measurements. The absorption coefficient of the PLZT ceramics is an exponential function of the photon energy. Two values of characteristic Urbach energy have been found ~EI = 106 meV and ~E2 = 238 meV. The first one is a characteristic of the potential of electron-phonon interaction of the optically excited transitions from the valence band to the conduction band and does not depend on lattice defects or admixtures. The other characterises the electron-phonon interaction at optical transitions between two localized electron states in the energy gap separated by 2.8 eV from each other. A hypothesis is proposed identifying the absorption band at 2.8 eV as the band of electron transitions in lead atoms perturbed by the presence of oxygen vacancies.

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Modified lead containing perovskite ceramics for electrooptic, electrocaloric, pyroelectric and electrostrictive applications

Sternberg

Shebanov

Birks

et al.

ISAF '92: Proceedings of the Eighth IEEE International Symposium on Applications of Ferroelectrics

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I n s t i t u t e of Solid S t a t e P h y s i c s , U n i v e r s i t y o f . L a t v i a ,8 Kengardgd S t . , LV-1063 R i g a , LATVIAThe .authors discuss the physical background of the feasible diversity of modified lead-containing perovskite ceramtc compositions with field-induced first order and diffused phase transitions, a number of particular model devices being considered. Specific changes of structure and properties of the PLZT ceramics doped with 3d-elements and radiation efects in some of the compositions are examined.

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Radiation effects in PLZT and PSN ceramics

Cited by 5 publications

References 7 publications

Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg_1/3Nb_2/3)O₃–0.1PbTiO₃ ceramics

Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg_1/3Nb_2/3)O₃–0.1PbTiO₃ ceramics

Laser-Calorimetric Study of Fundamental Absorption Edge in Pb,La(ZrTi)O3 (PLZT) Perovskite Ceramics

Modified lead containing perovskite ceramics for electrooptic, electrocaloric, pyroelectric and electrostrictive applications

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Radiation effects in PLZT and PSN ceramics

Cited by 5 publications

References 7 publications

Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 ceramics

Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg1/3Nb2/3)O3–0.1PbTiO3 ceramics

Laser-Calorimetric Study of Fundamental Absorption Edge in Pb,La(ZrTi)O3 (PLZT) Perovskite Ceramics

Modified lead containing perovskite ceramics for electrooptic, electrocaloric, pyroelectric and electrostrictive applications

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Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg_1/3Nb_2/3)O₃–0.1PbTiO₃ ceramics

Influence of neutron and gamma irradiation on the electrocaloric properties of Mn-doped 0.9Pb(Mg_1/3Nb_2/3)O₃–0.1PbTiO₃ ceramics