| Autor: |
R. Sridarane, Vinoth Shanmugam, Raghavendra Kashyap, C. Deviannapoorani, Ramaswamy Murugan |
| Rok vydání: |
2014 |
| Předmět: |
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| Zdroj: |
Current Applied Physics. 14:407-414 |
| ISSN: |
1567-1739 |
| DOI: |
10.1016/j.cap.2013.12.020 |
| Popis: |
Efforts have been made in this work to enhance the dielectric properties of SrBi 2 Nb 2 O 9 (SBN) by partial substitution of Zr 4+ for Nb 5+ . Systematic investigations on structure, microstructure, dielectric and impedance properties of the SrBi 2 (Nb 2−(4/5) x Zr x )O 9 [where, x = 0, 0.1 and 0.2] ceramic samples were carried out to understand the effect of substitution of Zr 4+ for Nb 5+ in SrBi 2 Nb 2 O 9 . The X-ray diffraction (XRD) investigations indicated that the lattice volume of SrBi 2 (Nb 2− (4/5) x Zr x )O 9 with x = 0.1 and 0.2 decreases compared to SBN. The SEM investigations revealed an increase in the size of grains and the change on shape of grains to elongated plate shaped structure with the increase of x ( x = 0.1 and 0.2) in SrBi 2 (Nb 2−(4/5) x Zr x )O 9 . Higher Curie temperature and enhanced peak dielectric constant at the Curie temperature were observed for both the SrBi 2 (Nb 2−(4/5) x Zr x )O 9 with x = 0.1 and 0.2 ceramic samples compared to SBN. Among the investigated compositions the higher Curie temperature and enhanced peak dielectric constant at the Curie temperature was observed for SrBi 2 (Nb 2−(4/5) x Zr x )O 9 with x = 0.1. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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