Ferroelectric composites and ceramics based on stillwellite-like solid solutions

• Published in: Journal of the European Ceramic Society Vol. 24; no. 6; pp. 1569 - 1572
• Main Authors: Sigaev, V.N., Sarkisov, P.D., Stefanovich, S.Yu, Mosunov, A.V., Pernice, P., Aronne, A., Kim, T.V., Fertikov, V.I., Avdyushin, K.N., Parfenov, B.G., Segalla, A.G.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 2004
• Subjects: Ferroelectrics; Solid solution; Stillwellite; Solid solution; Stillwellite; Ferroelectrics
• ISSN: 0955-2219; 1873-619X
• DOI: 10.1016/S0955-2219(03)00384-4

Stillwellite-like LaBGeO 5 exhibits promising pyroelectric properties that were observed for both single crystal and glass-ceramic textures. To increase pyroelectric coefficient in the room temperature range, it is worth trying to create stillwellite-like solid solutions diminishing ferroelectric phase transition point, T c. However such an attempt has been carried out only for LaBSiO 5 stillwellite doped with Pb(Ca)BPO 5. Taking into account the higher pyroelectric activity of LaBGeO 5 as compared to LaBSiO 5, in the present work existence of solid solutions in the LaBGeO 5–LaBSiO 5 and LaBGeO 5–Pb(Ca)BPO 5 systems was explored and T c composition dependency was determined. It can be supposed that compositions in the range LaBGe 0.2-0.4Si 0.8-0.6O 5 are good candidates to develop new high-effective pyroelectrics in form of ceramics, composites or textures.