Des monocristaux centimétriques issus du système Li2O–Na2O–K2O–Nb2O5–Ta2O5–Sb2O3 ont été obtenus par la méthode des flux. Les cristaux de composition (Li0.023Na0.583K0.394)(Nb0.925Ta0.037Sb0.038)O3 et (Li0.034Na0.609K0.357)(Nb0.896Ta0.047Sb0.057)O3 ont été caractérisés par diffraction des rayons X et se sont avérés appartenir au système quadratique. Leur comportement ferroélectrique spécifique a été confirmé par des mesures diélectriques. Une telle flexibilité des propriétés ferroélectriques de ces cristaux pour de faibles variations de composition ouvre la voie vers une meilleure compréhension des relations entre la structure et la polarisation dans ces solutions solides, qui sont potentiellement une alternative aux matériaux contenant du plomb.
We have grown by flux method centimeter-sized single crystals from pseudo-hexanary Li2O–Na2O–K2O–Nb2O5–Ta2O5–Sb2O3 system. Based on chemical analysis, crystals of compositions (Li0.023Na0.583K0.394)(Nb0.925Ta0.037Sb0.038)O3 and (Li0.034Na0.609K0.357)(Nb0.896Ta0.047Sb0.057)O3 were characterized by X-rays diffraction which revealed a tetragonal structure. The dielectric analysis confirmed that the ferroelectric behavior of these crystals is very sensitive to little changes in composition as previously observed on ceramics. Such high flexibility of the ferroelectric properties in crystals opens the way towards improved understanding of the relations between structure and polarization in solid solutions which may be an alternative to the lead-based materials.
Mot clés : Cristallogenèse, Solution hautes températures, Composés inorganiques, Matériaux ferroélectriques
Mythili Prakasam 1 ; Philippe Veber 1 ; Oudomsack Viraphong 1 ; Laetitia Etienne 1 ; Michel Lahaye 1 ; Stanislav Pechev 1 ; Eric Lebraud 1 ; Kiyoshi Shimamura 2 ; Mario Maglione 1
@article{CRPHYS_2013__14_2-3_133_0, author = {Mythili Prakasam and Philippe Veber and Oudomsack Viraphong and Laetitia Etienne and Michel Lahaye and Stanislav Pechev and Eric Lebraud and Kiyoshi Shimamura and Mario Maglione}, title = {Growth and characterizations of lead-free ferroelectric {KNN-based} crystals}, journal = {Comptes Rendus. Physique}, pages = {133--140}, publisher = {Elsevier}, volume = {14}, number = {2-3}, year = {2013}, doi = {10.1016/j.crhy.2012.10.002}, language = {en}, }
TY - JOUR AU - Mythili Prakasam AU - Philippe Veber AU - Oudomsack Viraphong AU - Laetitia Etienne AU - Michel Lahaye AU - Stanislav Pechev AU - Eric Lebraud AU - Kiyoshi Shimamura AU - Mario Maglione TI - Growth and characterizations of lead-free ferroelectric KNN-based crystals JO - Comptes Rendus. Physique PY - 2013 SP - 133 EP - 140 VL - 14 IS - 2-3 PB - Elsevier DO - 10.1016/j.crhy.2012.10.002 LA - en ID - CRPHYS_2013__14_2-3_133_0 ER -
%0 Journal Article %A Mythili Prakasam %A Philippe Veber %A Oudomsack Viraphong %A Laetitia Etienne %A Michel Lahaye %A Stanislav Pechev %A Eric Lebraud %A Kiyoshi Shimamura %A Mario Maglione %T Growth and characterizations of lead-free ferroelectric KNN-based crystals %J Comptes Rendus. Physique %D 2013 %P 133-140 %V 14 %N 2-3 %I Elsevier %R 10.1016/j.crhy.2012.10.002 %G en %F CRPHYS_2013__14_2-3_133_0
Mythili Prakasam; Philippe Veber; Oudomsack Viraphong; Laetitia Etienne; Michel Lahaye; Stanislav Pechev; Eric Lebraud; Kiyoshi Shimamura; Mario Maglione. Growth and characterizations of lead-free ferroelectric KNN-based crystals. Comptes Rendus. Physique, Volume 14 (2013) no. 2-3, pp. 133-140. doi : 10.1016/j.crhy.2012.10.002. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2012.10.002/
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