Chemistry:Strontium barium niobate
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3D model (JSmol)
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CompTox Dashboard (EPA)
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| Properties | |
| (Srx,Ba1−x)Nb2O6 for 0.32≤x≤0.82 | |
| Density | 5.24-5.39 g/cm3 [1] |
| Melting point | 1,427–1,480[2] °C (2,601–2,696 °F; 1,700–1,753 K) |
| Hazards | |
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| GHS Signal word | Warning |
| H302, H332 | |
| P261, P264, P270, P271, P301+312, P304+312, P304+340, P312, P330, P501 | |
| Structure | |
| Tetragonal | |
| P4bm [1] | |
| 4mm | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
| Infobox references | |
Strontium barium niobate is the chemical compound SrxBa1−xNb2O6 for 0.32≤x≤0.82.[1]
Strontium barium niobate is a ferroelectric material commonly used in single crystal form in electro-optics, acousto-optics, and photorefractive non-linear optics for its photorefractive properties.
Strontium barium niobate is one of the few tetragonal tungsten bronze compounds without volatile elements making it a useful system for probing structure-property relations. Strontium barium niobate is a normal ferroelectric for Barium-rich compositions and becomes a relaxor ferroelectric with increasing strontium content.[3] This has been attributed to positional disorder of the A-site cations [4] alongside incommensurate oxygen octahedral tilting [5]
Strontium barium niobate is one of numerous ceramic materials that are known to exhibit abnormal grain growth, in which certain grains grow very large within a matrix of finer equiaxed grains. This abnormal grain growth (AGG) has significant consequences on the dielectric and electronic performance of strontium barium niobate [6]
References
- ↑ 1.0 1.1 1.2 Podlozhenov, S.; Graetsch, H. A.; Schneider, J.; Ulex, M.; Wöhlecke, M.; Betzler, K. (2006). "Structure of strontium barium niobate SrxBa1−xNb2O6 (SBN) in the composition range 0.32 ≤ x ≤ 0.82.". Acta Crystallographica Section B 62 (Pt 6): 960–965. doi:10.1107/S0108768106038869. PMID 17108647.
- ↑ "Physicochemial Study of the SrNb2O6-BaNb2O6 System". Zhurnal Fizicheskoi Khimii 51 (11): 2948–2950. 1979.
- ↑ Huang, W. H.; Viehland, Dwight; Neurgaonkar, R. R. (1994). "Anisotropic Glasslike Characteristics of Strontium Barium Niobate Relaxors". Journal of Applied Physics 76 (1): 490–496. doi:10.1063/1.357100. Bibcode: 1994JAP....76..490H.
- ↑ Trubelja, M. P.; Ryba, E.; Smith, D. K. (1996). "A Study of Positional Disorder in Strontium Barium Niobate". Journal of Materials Science 31 (6): 1435–1443. doi:10.1007/bf00357850. Bibcode: 1996JMatS..31.1435T.
- ↑ "Effects of A1/A2-sites Occupancy upon Ferroelectric Transition in (SrxBa1-x)Nb2O6 Tungsten Bronze Ceramics". Journal of the American Ceramic Society 97: 507–512. 2014. doi:10.1111/jace.12659.
- ↑ Lee, H.-Y.; Freer, R. (1997). "The mechanism of abnormal grain growth in Sr0.6Ba0.4Nb2O6 ceramics". J. Appl. Phys. 81 (1): 376–382. doi:10.1063/1.364122. Bibcode: 1997JAP....81..376L.
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