Samal, Saroj L. ; Lakshmi Narayana Rao, G. ; Raju, K. C. James ; Ganguli, Ashok K. (2009) Microwave dielectric properties of new complex perovskites: (Ba1/3Ln2/3)(Zn1/3Ti2/3)O3 (Ln=La, Pr, and Nd) and (Ba(1+x)/3La(2-x)/3)(Zn1/3Ti(2-x)/3Nbx/3)O3 Japanese Journal of Applied Physics, 48 (6R). Article ID 061401. ISSN 0021-4922
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Official URL: http://iopscience.iop.org/article/10.1143/JJAP.48....
Related URL: http://dx.doi.org/10.1143/JJAP.48.061401
Abstract
Complex perovskites of the formula (Ba1/3Ln2/3)(Zn1/3Ti2/3)O3 (Ln=La, Pr, and Nd) and (Ba(1+x)/3La(2-x)/3)(Zn1/3Ti(2-x)/3Nbx/3)O3 (x=0.5,0.75,1.0,1.25) have been synthesized by solid state reactions and are found to crystallize in the cubic structure (space group Pm3m) from Rietveld refinement of powder X-ray data. The lattice parameter and the grain size increases with Nb substitution. Among the above oxides, (Ba1/3La2/3)(Zn1/3Ti2/3)O3 shows the best dielectric properties with quality factor (Q) of 3139 at 6.67 GHz and a temperature coefficient of resonant frequency (τf) of -10.8 ppm/°C. Further, the temperature coefficient of resonant frequency (τf) shows a large and systematic variation (with a continued decrease and a change of sign from positive to negative) with increase in Nb content.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics. |
| ID Code: | 112103 |
| Deposited On: | 28 Sep 2017 12:24 |
| Last Modified: | 28 Sep 2017 12:24 |
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