scholarly journals Ferroelectric Phase Transition of Lead Free (1-x)(Na0.5K0.5)NbO3-xLiNbO3Ceramics

2012 ◽  
Vol 13 (6) ◽  
pp. 297-300 ◽  
Author(s):  
Jong-Ho Park ◽  
Hui-Jin Park ◽  
Byung-Chun Choi
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Lead Free

scholarly journals A monoclinic-tetragonal ferroelectric phase transition in lead-free (K0.5Na0.5)NbO3-x%LiNbO3 solid solution

2012 ◽  
Vol 111 (10) ◽  
pp. 103503 ◽  
Author(s):  
Wenwei Ge ◽  
Yang Ren ◽  
Jialiang Zhang ◽  
Christopher P. Devreugd ◽  
Jiefang Li ◽  
...  
Keyword(s):  
Phase Transition ◽  
Solid Solution ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Lead Free

Study of ferroelectric phase transition in new lead free Ba(Ca1/3Nb2/3)O3 compound

2017 ◽  
Vol 518 (1) ◽  
pp. 73-84
Author(s):  
M. Pastor ◽  
Patri Tirupathi ◽  
Nawnit Kumar ◽  
Amrish K. Panwar ◽  
M. Chopkar ◽  
...  
Keyword(s):  
Phase Transition ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Lead Free

scholarly journals Phonons and relaxations in unfilled tetragonal tungsten-bronzes

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
E. Buixaderas ◽  
J. Dec
Keyword(s):  
Phase Transition ◽  
High Frequency ◽  
Ferroelectric Phase Transition ◽  
Ferroelectric Phase ◽  
Lead Free ◽  
Qualitative Behaviour ◽  
Characteristic Frequencies ◽  
Slowing Down ◽  
Central Mode ◽  
Thz Range

The lead-free unfilled tetragonal tungsten-bronzes SBN and CBN are investigated by Raman, infrared and high-frequency dielectric spectroscopies. The substitution in the different channels affects phonons as well as relaxations. Relaxations in SBN show similar qualitative behaviour on increasing Sr content and relaxor behaviour, but for the extreme relaxor samples all characteristic frequencies are higher with stronger contribution to the permittivity in the GHz-THz range is stronger. The presence of a soft anharmonic central mode in the THz range together with the slowing down of a relaxation from GHz to MHz ranges reveals the coexistence of displacive and order-disorder scenarios for the ferroelectric phase transition in this family.

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