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- Title
Low loss and middle permittivity of (1 − x) CaLaTiO- xNdAlO dielectric resonators with near-zero temperature coefficient of the resonant frequency.
- Authors
Di, Jie-chang; Chen, Guo-hua; Hou, Mei-zhen; Yuan, Chang-lai; Xu, Hua-rui; Zhou, Chang-rong
- Abstract
The crystal structures, microstructure and microwave dielectric properties of (1 − x) CaLaTiO- xNdAlO (0 ≤ x ≤ 0.7) ceramic system have been investigated. The results show that all the compositions form single-phase ceramics. The microwave dielectric properties are strongly correlated with composition, sintering temperature, grain sizes and lattice defects. The cell volume decreases because of the substitution of Al for Ti and Nd for La which is associated with a decrease in the permittivity. With increase in x value, the permittivity (ε), temperature coefficient of resonant frequency (τ) and Q × f value decrease. A near-zero τ is achieved at x = 0.6 with permittivity of 41.8 and Q × f value of 13,783 GHz.
- Subjects
PERMITTIVITY; DIELECTRIC resonators; DIELECTRICS research; SINTERING; CRYSTAL defects
- Publication
Journal of Materials Science, 2012, Vol 47, Issue 5, p2271
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-011-6039-x