Abstract
The low sintering temperature and the good dielectric properties such as high dielectric constant (ε r ), high quality factor (Q × f), and small temperature coefficient of resonant frequency (TCF) are required for the application of chip passive components in wireless communication low temperature co-fired ceramics (LTCC). In the present study, the sintering behaviors and dielectric properties of Ba3Ti5Nb 6O28 ceramics were investigated as a function of B 2O3-CuO content. The pure Ba3Ti 5Nb6O28 system showed a high sintering temperature (1250°C) and had the good microwave dielectric properties: Q × f of 10,600 GHz, ε r of 37, TCF of -12 ppm/°C. The addition of B2O3-CuO was revealed to lower the sintering temperature of Ba3Ti5Nb6O28, 900°C and to enhance the microwave dielectric properties: Q × f of 32,500 GHz, ε r of 40, TCF of 9 ppm/°C. From the X-ray photoelectron spectroscopy (XPS) and X-ray powder diffraction (XRD) studies, these phenomena were explained in terms of the reduction of oxygen vacancies and the formation of secondary phases having the good microwave dielectric properties.
Original language | English |
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Pages (from-to) | 439-443 |
Number of pages | 5 |
Journal | Journal of Electroceramics |
Volume | 17 |
Issue number | 2-4 |
DOIs | |
Publication status | Published - 2006 Dec |
Externally published | Yes |
Keywords
- BaTiNbO
- Dielectric properties
- Low temperature sintering
- XPS
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Mechanics of Materials
- Electrical and Electronic Engineering
- Materials Chemistry