- Tytuł:
- Application of High Permittivity Bismuth Copper Titanate in Multilayer Capacitors
- Autorzy:
-
Szwagierczak, D.
Kulawik, J. - Powiązania:
- https://bibliotekanauki.pl/articles/1490915.pdf
- Data publikacji:
- 2012-01
- Wydawca:
- Polska Akademia Nauk. Instytut Fizyki PAN
- Tematy:
-
77.22.-d
81.20.-n
84.32.Tt
85.40.Xx - Opis:
- A nonferroelectric high permittivity compound with the perovskite structure, $Bi_{2//3}Cu_3Ti_4O_{12}$, was synthesized at 900°C. The ceramic powder and appropriate organic additives were used for preparation of a slurry for tape casting. The obtained green tapes were smooth, flexible, and with a uniform thickness of 25 μm after drying at 50°C. Ag electrodes were screen printed on green rectangular sheets cut by a laser. Subsequent operations were screen printing of Ag internal electrodes, stacking of green sheets, isostatic lamination, cutting, deposition of external terminations and co-firing of dielectric and conductive layers at 850°C. Scanning electron microscopy observations showed well sintered, dense, fine-grained microstructure of ceramic layers and good cooperation with the electrodes made of commercial Ag paste. Capacitance and dissipation factor of multilayer capacitors were examined in the temperature range from - 55 to 330C at frequencies 10 Hz-2 MHz. The fabricated multilayer capacitors exhibit high capacitance and relatively low temperature coefficient of capacitance in the temperature range from - 55 to 110°C. The obtained lead-free high permittivity nonferroelectric material $Bi_{2//3}Cu_3Ti_4O_{12}$ is a spontaneously formed internal barrier capacitor. This material seems to be a promising alternative for conventional lead-based relaxor dielectrics in multilayer ceramic capacitors.
- Źródło:
-
Acta Physica Polonica A; 2012, 121, 1; 119-121
0587-4246
1898-794X - Pojawia się w:
- Acta Physica Polonica A
- Dostawca treści:
- Biblioteka Nauki
Artykuł