Strontium barium niobate
Identifiers
3D model (JSmol)
EC Number
  • x=0.5: 253-383-3
  • InChI=1S/Ba.4Nb.12O.Sr/q+2;;;;;;;;;;;;;4*-1;+2
    Key: DKDQMLPMKQLBHQ-UHFFFAOYSA-N
  • x=0.5: [O-][Nb](=O)=O.[O-][Nb](=O)=O.[O-][Nb](=O)=O.[O-][Nb](=O)=O.[Sr+2].[Ba+2]
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
GHS labelling:
GHS07: Exclamation mark
Warning
H302, H332
P261, P264, P270, P271, P301+P312, P304+P312, P304+P340, 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. 1 2 3 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.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.