About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Powder and Ceramic Materials Science
|
Presentation Title |
Development of High Voltage Multilayer Ceramic Capacitor |
Author(s) |
Hyungsuk Kim |
On-Site Speaker (Planned) |
Hyungsuk Kim |
Abstract Scope |
MLCC serves as a filter for reducing the noise of electric current. BaTiO3 (BT) is currently used as a dielectric material for high-capacity MLCCs. As power and charging speed of the EVs improves higher voltages need to be selected. BT has material limitation in that the dielectric constant decreases with increasing voltage. Therefore, sacrifices has to be made in capacitance by decreasing permittivity or antiferroelectric materials need to be utilized.
In this study, PLZT-based MLCC with higher dielectric constant than BT in 200~400V was developed. The contents of Pb, La, Zr, and Ti were optimized and Ni electrode was replaced with Cu to reduce cost. To solve possible Cu oxidation and PbO reduction, oxygen partial pressure was optimized. MLCC with BT was also developed by optimizing additives and BT powder size and low-temperature sintering method. |
Proceedings Inclusion? |
Planned: |
Keywords |
Ceramics, Electronic Materials, Powder Materials |