Giant permittivity of la doped bati03 ceramics
Référence
00399-01
Mots-clés
Barium titanate, Dielectric properties, Electroceramics, MLCC, Perovskite, Capacitors, Passive components
Statut des brevets
French priority patent application BF06/03414 filed on 19th April, 2006 and entitled « Céramique à base de titane de baryum dopé au lanthane, nouveau procédé de préparation et utilisation »
Inventeurs
Sophie GUILLEMET
Thierry LEBEY
Bernard DURAND
Madona BOULOS
Quang NGUYEN
Statut commercial
Exclusive or non-exclusive licenses, Collaborative agreement
Laboratoire
Centre Interuniversitaire de Recherche et d’Ingénierie des Matériaux (CIRIMAT, UMR5085) and Laboratoire de Génie Electrique de Toulouse (LGET, 5003), Toulouse France.
Description
TECHNICAL DESCRIPTION
This invention describes a novel process to produce La doped barium titanate powders by a “chimie douce” specific process. SPS sintering and thermal treatment allow preparing ceramics of major characteristics:
– relative permittivity higher than 100 000 for frequency range 0.1 -100 Hz (see curve)
– no ferroelectric properties between -100 and +200°C
INDUSTRIAL APPLICATIONS
Applications include passive electronic components such as multilayer ceramic capacitors. The relative permittivity of this invention could make it possible to simplify the geometry of MLCC and raise the possible capacitance.
For further information, please contact us (Ref 00399-01)
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