Anzeige
Erschienen in:
01.07.2012
Low temperature sintering and microwave dielectric properties of 7NiNb2O6–9TiO2 ceramics with CuO addition
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 7/2012
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 effects of CuO additive on sintering temperature and microwave dielectric properties of 7NiNb2O6–9TiO2 ceramics prepared by solid-state reaction method have been investigated. The phases and microstructure have also been evaluated using X-ray diffraction and scanning electron microscopy. The pure 7NiNb2O6–9TiO2 ceramics show a high sintering temperature of about 1,200 °C. However, the addition of CuO lowered the sintering temperature of 7NiNb2O6–9TiO2 ceramics from 1,200 to 935 °C due to the CuO liquid-phase. The results showed that the microwave dielectric properties were strongly dependent on densification, crystalline phases and grain size. The 7NiNb2O6–9TiO2 ceramics with the addition of 3.2 wt% CuO sintered at 935 °C afforded excellent dielectric properties of ε
r
= 60.5, Q × f = 10,039 GHz (at 3.8 GHz) and τ
f
= 62 ppm/°C, which represented very promising candidates for LTCC dielectric materials.