Zobrazeno 1 - 10
of 25
pro vyhledávání: '"Robert Dittmer"'
Publikováno v:
Nanoscale. 7:11787-11796
Polar nanoregions (PNRs) play a key role in the functionality of relaxor ferroelectrics; however, visualizing them in lead-free relaxor ferroelectrics with high lateral resolution is still challenging. Thus, we studied herein the local ferroelectric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c4206522ab545969993937c5f7bab36
https://doi.org/10.1039/c5nr01326g
https://doi.org/10.1039/c5nr01326g
Autor:
Sarunas Svirskas, Robert Dittmer, Jan Petzelt, Juras Banys, Marek Paściak, Dmitry Nuzhnyy, Viktor Bovtun, Jürgen Rödel, Stanislav Kamba
Publikováno v:
Phase Transitions. 87:953-965
Dynamics of the main dielectric anomaly in Na1/2Bi1/2TiO3 (NBT) were studied by time-domain THz and microwave spectroscopy, using also previously published data and their new overall fits. Above the dielectric maximum temperature Tm ≈ 600 K, the re
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b4c1817497cf24f5f2a007ecb920ae05
https://doi.org/10.1080/01411594.2014.953517
https://doi.org/10.1080/01411594.2014.953517
Publikováno v:
Journal of the American Ceramic Society. 96:3312-3324
Lead-free piezoelectric (1 – x – y)(Bi1/2Na1/2)TiO3–xBaTiO3– y(K0.5Na0.5)NbO3 (BNT–BT–KNN) ceramics were examined in situ under increasing temperature in the transmission electron microscope. Changing superstructure reflections indicate a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b922dea3c230c0e4e0b0fff7f2273346
https://doi.org/10.1111/jace.12493
https://doi.org/10.1111/jace.12493
Publikováno v:
Acta Materialia. 61:1350-1358
The strain and polarization hystereses of lead-free 0.94Bi1/2Na1/2TiO3–0.06BaTiO3 during unipolar electric field loading are obtained from room temperature to 150 °C under uniaxial compressive stress up to 446 MPa. At intermediate temperatures a s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2e4d4db36ebd06bff9b2fb6916a73687
https://doi.org/10.1016/j.actamat.2012.11.012
https://doi.org/10.1016/j.actamat.2012.11.012
Publikováno v:
Sensors and Actuators A: Physical. 189:187-194
The large-signal unipolar behavior of PZT is characterized under combined electrical, thermal, and mechanical loading. Maximum strain Smax and polarization Pmax feature a pronounced sensitivity on stress with a field-dependent peak evolving at around
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::557974010c168d75b3574c80804b1f3e
https://doi.org/10.1016/j.sna.2012.09.015
https://doi.org/10.1016/j.sna.2012.09.015
A High-Temperature-Capacitor Dielectric Based on K0.5Na0.5NbO3-Modified Bi1/2Na1/2TiO3-Bi1/2K1/2TiO3
Autor:
Ian M. Reaney, Mark Hoffman, Eva-Maria Anton, Jan Pokorny, John E. Daniels, Jürgen Rödel, Wook Jo, Hugh Simons, Robert Dittmer
Publikováno v:
Journal of the American Ceramic Society. 95:3519-3524
A high-temperature dielectric, (1–x)(0.6Bi1/2Na1/2TiO3–0.4Bi1/2K1/2TiO3)–xK0.5Na0.5NbO3, off the morphotropic phase boundary of the parent matrix 0.8Bi1/2Na1/2TiO3–0.2Bi1/2K1/2TiO3, has been developed for application as a high-temperature cap
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7b74f4d6ea0245b5a93ec7942ba48c5e
https://doi.org/10.1111/j.1551-2916.2012.05321.x
https://doi.org/10.1111/j.1551-2916.2012.05321.x
Publikováno v:
Scripta Materialia. 67:100-103
Blocking stress (σb) and free strain (Sf) are the most important parameters for piezoelectric actuators, both having a decisive impact on the electromechanical performance. Here, we report on the blocking stress of lead-free piezoceramics, using 0.9
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::48ee5ddcaa6dd93a83f1cd3a5e2b0232
https://doi.org/10.1016/j.scriptamat.2012.03.031
https://doi.org/10.1016/j.scriptamat.2012.03.031
Publikováno v:
Advanced Functional Materials. 22:4208-4215
Piezoresponse force microscopy (PFM) is used to afford insight into the nanoscale electromechanical behavior of lead-free piezoceramics. Materials based on Bi1/2Na1/2TiO3 exhibit high strains mediated by a field-induced phase transition. Using the ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61d3259d3dac10e86f0827d439423ff2
https://doi.org/10.1002/adfm.201200592
https://doi.org/10.1002/adfm.201200592
Autor:
Robert Dittmer, Claudia Groh, Matias Acosta, Jiadong Zang, Wook Jo, Eva Sapper, Ke Wang, Jürgen Rödel
Publikováno v:
Journal of Electroceramics. 29:71-93
In response to the current environmental regulations against the use of lead in daily electronic devices, a number of investigations have been performed worldwide in search for alternative piezoelectric ceramics that can replace the market-dominating
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e12a9930cf88b2e8e5db92cb6b1d1c9e
https://doi.org/10.1007/s10832-012-9742-3
https://doi.org/10.1007/s10832-012-9742-3
Autor:
Sergey Zhukov, Sergey V. Yampolskii, Robert Dittmer, Wook Jo, J. Schütrumpf, Yuri A. Genenko, Hans Kungl, Heinz von Seggern, Michael J. Hoffmann
Publikováno v:
Advanced Functional Materials. 22:2058-2066
Universal scaling features of polarization switching are established experimentally in rather different classes of disordered ferroelectrics: in well-studied lead-zirconate titanate (PZT) ferroelectrics, in recently synthesized Cu-stabilized 0.94(Bi1
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e915bdade32a7848b8cc2dbb3587eb7f
https://doi.org/10.1002/adfm.201102841
https://doi.org/10.1002/adfm.201102841