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Microstructures and Microwave Dielectric Characteristics of CA(Zn1/3Nb2/3)O3 Complex Perovskite Ceramics.
- Source :
- Journal of the American Ceramic Society; Dec2004, Vol. 87 Issue 12, p2208-2212, 5p
- Publication Year :
- 2004
-
Abstract
- Ca(Zn<subscript>⅓</subscript>Nb<subscript>⅔</subscript>)O<subscript>3</subscript> microwave dielectric ceramics were prepared using a solid-state reaction process, and their microwave dielectric properties were evaluated as functions of sintering and postdensification annealing conditions. The relationship between microwave dielectric properties and processing was interpreted through the variation of microstructures. The dielectric constant showed slight variation with sintering and annealing conditions, but the Q × f value increased at first and then decreased with Increased sintering temperature, and annealing in oxygen indicated significant improvement in Q × f, especially for the specimens sintered at higher temperatures. The good microwave dielectric properties were obtained in the ceramics sintered at 1225°C in air for 3 h and annealed at 1100°C in oxygen for 8 h: ∊ = 34.1, Q × f = 15 890 GHz, τ<subscript>r</subscript> = -48 ppm/°C. [ABSTRACT FROM AUTHOR]
- Subjects :
- PEROVSKITE
OXIDE minerals
SINTERING
POWDER metallurgy
IRON metallurgy
RESEARCH
Subjects
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 87
- Issue :
- 12
- Database :
- Complementary Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 15688814
- Full Text :
- https://doi.org/10.1111/j.1151-2916.2004.tb07492.x