Details

Autor(en) / Beteiligte

• Zeb, Aurang
• Milne, Steven J.
• Damjanovic, D.

Titel

Dielectric Properties of Ba0.8Ca0.2TiO3-Bi(Mg0.5,Ti0.5)O3-NaNbO3 Ceramics

Ist Teil von

• Journal of the American Ceramic Society, 2013-12, Vol.96 (12), p.3701-3703

Ort / Verlag

Blackwell Publishing Ltd

Erscheinungsjahr

2013

Link zum Volltext

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• Ceramics in the system 0.45Ba0.8Ca0.2TiO3–(0.55−x)Bi(Mg0.5Ti0.5)O3–xNaNbO3, x = 0–0.02 were fabricated by a conventional solid‐state reaction route. X‐ray powder diffraction indicated cubic or pseudocubic symmetry for all samples. The parent 0.45Ba0.8Ca0.2TiO3–0.55Bi(Mg0.5Ti0.5)O3 composition is a relaxor dielectric with a near‐stable temperature coefficient of relative permittivity, εr = 950 ± 10% across the temperature range 80°C–600°C. Incorporation of NaNbO3 at x = 0.2 extends the lower working temperature to ≤25°C, with εr = 575% ± 15% from temperatures ≤25°C to >400°C, and tan δ < 0.025 from 25°C to 400°C. Values of dc resistivity ranged from ~109 Ω·m at 250°C to ~106 Ω·m at 500°C. The properties suggest that this material may be of interest for high‐temperature capacitor applications.