Back to Search
Start Over
Microwave dielectric properties of BaO–2(1− x)ZnO–xNd2O3–4TiO2 (x =0–1.0) ceramics
- Source :
-
Ceramics International . Jan2012, Vol. 38 Issue 1, p613-618. 6p. - Publication Year :
- 2012
-
Abstract
- Abstract: Microwave dielectric properties of (1− x)BaZn2Ti4O11–xBaNd2Ti4O12 (x =0–1.0) ceramics were investigated by the solid-state reaction with the purpose of finding a microwave ceramics with high dielectric constant (ɛ r), high quality factor (Q × f) and low temperature coefficient of resonant frequency (τ f). A two phase system BaZn2Ti4O11–BaNd2Ti4O12 was formed and SEM photographs show equiaxed BaZn2Ti4O11 grains and columnar BaNd2Ti4O12 grains. The microwave dielectric properties were strongly determined by the chemical composition. As increasing x from 0 to 1.0, the phase composition varied from pure BaZn2Ti4O11, to the two phase system BaZn2Ti4O11–BaNd2Ti4O12 and then to pure BaNd2Ti4O12. Therefore, the ɛ r raised from 29.1 to 82.0 and the Q × f values decreased from 54,630GHz to 8110GHz, and the τ f values increased from −29ppm/°C to 94ppm/°C. 0.8BaZn2Ti4O11–0.2BaNd2Ti4O12 ceramics sintered at 1250°C for 2.5h had ɛ r =39.1, Q × f =37,850GHz and τ f =−9ppm/°C. [Copyright &y& Elsevier]
- Subjects :
- *PERMITTIVITY
*BARIUM oxide
*ZINC oxide
*NEODYMIUM
*TITANIUM dioxide
*CERAMIC metals
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 38
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 67325309
- Full Text :
- https://doi.org/10.1016/j.ceramint.2011.07.050