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Strontium barium niobate

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Strontium barium niobate
Identifiers
CAS Number
3D model (JSmol)
EC Number
  • x=0.5: 253-383-3
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/Ba.4Nb.12O.Sr/q+2;;;;;;;;;;;;;4*-1;+2Key: DKDQMLPMKQLBHQ-UHFFFAOYSA-N
SMILES
  • x=0.5: (=O)=O.(=O)=O.(=O)=O.(=O)=O..
Properties
Chemical formula (Srx,Ba1−x)Nb2O6 for 0.32≤x≤0.82
Density 5.24-5.39 g/cm
Melting point 1,427–1,480 °C (2,601–2,696 °F; 1,700–1,753 K)
Hazards
GHS labelling:
Pictograms GHS07: Exclamation mark
Signal word Warning
Hazard statements H302, H332
Precautionary statements P261, P264, P270, P271, P301+P312, P304+P312, P304+P340, P312, P330, P501
Structure
Crystal structure Tetragonal
Space group P4bm
Point group 4mm
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Infobox references
Chemical compound

Strontium barium niobate is the chemical compound SrxBa1−xNb2O6 for 0.32≤x≤0.82.

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. This has been attributed to positional disorder of the A-site cations alongside incommensurate oxygen octahedral tilting

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

References

  1. ^ 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.
  2. "Physicochemial Study of the SrNb2O6-BaNb2O6 System". Zhurnal Fizicheskoi Khimii. 51 (11): 2948–2950. 1979.
  3. 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. Bibcode:1994JAP....76..490H. doi:10.1063/1.357100.
  4. 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. Bibcode:1996JMatS..31.1435T. doi:10.1007/bf00357850. S2CID 94242966.
  5. "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.
  6. Lee, H.-Y.; Freer, R. (1997). "The mechanism of abnormal grain growth in Sr0.6Ba0.4Nb2O6 ceramics". J. Appl. Phys. 81 (1): 376–382. Bibcode:1997JAP....81..376L. doi:10.1063/1.364122.


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