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handle: 10261/27266
[ES] La presente invención se refiere a un procedimiento para modificar controladamente las propiedades eléctricas del óxido NaNbO3 mediante la creación de vacantes catiónicas en la subred A de la estructura tipo perovskita. La introducción progresiva de vacantes en la subred A al dopar con un ion alcalinotérreo como por ejemplo Sr2+o con un ion de tierra rara como por ejemplo La3+ permite Ia estabilización de un material ferroeléctrico, y el cambio continuo de comportamiento ferroeléctrico a ferroeléctrico-relaxor característico de las disoluciones sólidas tipo perovskita sin plomo. La presente invención incluye el procedimiento para Ia obtención de los óxidos que, en función de sus propiedades, pueden ser usados en dispositivos electrónicos como materiales piezoeléctricos y piroeléctricos en sensores y actuadores.
[EN] The invention relates to a method for the controlled modification of the electrical properties of NaNb03 oxide through the creation of cation vacancies in subnetwork A of the perovskite-type structure. The gradual introduction of vacancies into subnetwork A by means of doping with an alkaline-earth ion, e.g. Sr2+, or with a rare-eaxth ion, e.g. La3+, enables the stabilisation of a ferroelectric material and continuous conversion from ferroelectric to ferroelectric relaxor behaviour characteristic of lead-ftee perovskite-type solid solutions. The invention relates to a method for obtaining oxides which, depending on the properties thereof, can be used in electronic devices and as piezoelectric and pyroelectric materials in sensors and actuators.
Universidad Complutense de Madrid (UCM), Consejo Superior de Investigaciones Científicas (España)
A1 Solicitud de patentes con informe sobre el estado de la técnica
Peer reviewed
Sodium-niobate, Perovskite
Sodium-niobate, Perovskite
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