Anzeige
Erschienen in:
09.07.2018
Ultra-low temperature fired glass-free Li2O–MO–WO3 (M = Co, Ni, Ca, Ba) microwave dielectric ceramics
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 17/2018
EinloggenAktivieren Sie unsere intelligente Suche, um passende Fachinhalte oder Patente zu finden.
Wählen Sie Textabschnitte aus um mit Künstlicher Intelligenz passenden Patente zu finden. powered by
Markieren Sie Textabschnitte, um KI-gestützt weitere passende Inhalte zu finden. powered by
Abstract
The Li2O–MO–WO3 (M = Co, Ni, Ca, Ba) ceramics for ultra-low temperature co-fired ceramic application were prepared by using the conventional solid-state reaction route. The phase composition, microstructures, and microwave dielectric properties of the compounds were investigated systematically. The X-ray diffraction patterns show that the Li2O–MO–WO3 (M = Co, Ni) consist of CoWO4 (NiWO4), Li2WO4 and Li2W2O7 phases while Li2O–MO–WO3 (M = Ca, Ba) comprises CaWO4 (BaWO4) and Li2WO4 phases. The porosity and phase constitution acted as a controlling factor of dielectric constant in the Li2O–MO–WO3 (M = Co, Ni, Ca, Ba) ceramics. These compounds can be sintered at ultra-low temperature of 600–680 °C and exhibit good microwave dielectric properties with εr = 5.6–13.5, Q × f = 13,000–25,000 GHz, and τf =− 97.3 to − 38.3 ppm/°C, which made the compounds promising for multilayer ultra-low temperature cofiring dielectrics application.