Abstract
We developed multilayer ceramic capacitors (MLCCs) of the type negative-positive zero (NPO) cofired with Cu inner electrodes using novel low-loss barium niobates. The excellent dielectric properties of ceramics and compatibility between electrodes and dielectrics under a reducing atmosphere led to low loss character in the Cu-MLCCs, even in the high-frequency single-layer capacitors. We also examine the atmospheric dependence on dielectric loss of barium niobates. The origin of degradation in dielectric loss under a highly reducing atmosphere is explained by the association of two loss mechanisms: the oxygen vacancies in NbO6 octahedra and the subsequent formation of a reduced second phase: Ba3Nb 4+Nb45+O15.
Original language | English |
---|---|
Pages (from-to) | 3302-3304 |
Number of pages | 3 |
Journal | Journal of the American Ceramic Society |
Volume | 89 |
Issue number | 10 |
DOIs | |
Publication status | Published - 2006 Oct |
Externally published | Yes |
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry