:Strontium barium niobate

{{Chembox

| ImageFile = SBN Structure.png

| ImageSize = 220px

| ImageAlt =

| IUPACName =

| OtherNames =

| Section1 = {{Chembox Identifiers

| index_label=x=0.5

| CASNo = 37185-09-4

| DTXSID = DTXSID70190669

| EINECS = 253-383-3

| PubChem = 21862943

| StdInChI=1S/Ba.4Nb.12O.Sr/q+2;;;;;;;;;;;;;4*-1;+2

| StdInChIKey = DKDQMLPMKQLBHQ-UHFFFAOYSA-N

| SMILES = [O-][Nb](=O)=O.[O-][Nb](=O)=O.[O-][Nb](=O)=O.[O-][Nb](=O)=O.[Sr+2].[Ba+2]

}}

| Section2 = {{Chembox Properties

| Formula = (Sr_x,Ba_1−x)Nb₂O₆ for 0.32≤x≤0.82

| MolarMass =

| Appearance =

| Density = 5.24-5.39 g/cm³ {{Cite journal | doi=10.1107/S0108768106038869 | volume=62 | title=Structure of strontium barium niobate Sr_xBa_1−xNb₂O₆ (SBN) in the composition range 0.32 ≤ x ≤ 0.82. | year=2006 | pages=960–965 | journal=Acta Crystallographica Section B| pmid=17108647 | doi-access=free | last1=Podlozhenov | first1=S. | last2=Graetsch | first2=H. A. | last3=Schneider | first3=J. | last4=Ulex | first4=M. | last5=Wöhlecke | first5=M. | last6=Betzler | first6=K. | issue=Pt 6 }}

| MeltingPtC = 1427-1480 {{Cite journal | volume=51 | title=Physicochemial Study of the SrNb₂O₆-BaNb₂O₆ System | year=1979 | pages=2948–2950 | journal=Zhurnal Fizicheskoi Khimii| issue=11 }}

| BoilingPt =

| Solubility =

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| Section3 = {{Chembox Hazards

| GHSPictograms = {{GHS07}}

| GHSSignalWord = Warning

| HPhrases = {{H-phrases|302|332}}

| PPhrases = {{P-phrases|261|264|270|271|301+312|304+312|304+340|312|330|501}}

| MainHazards =

| FlashPt =

| AutoignitionPt =

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|Section4={{Chembox Structure

| CrystalStruct = Tetragonal

| SpaceGroup = P4bm

| PointGroup = 4mm

| Coordination =

| Dipole =

}}

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Strontium barium niobate is the chemical compound Sr_xBa_1−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.{{Cite journal | volume=76 | title=Anisotropic Glasslike Characteristics of Strontium Barium Niobate Relaxors | year=1994 | pages=490–496 | journal=Journal of Applied Physics | doi=10.1063/1.357100| last1=Huang | first1=W. H. | last2=Viehland | first2=Dwight | last3=Neurgaonkar | first3=R. R. | issue=1 | bibcode=1994JAP....76..490H }} This has been attributed to positional disorder of the A-site cations {{Cite journal | volume=31 | title=A Study of Positional Disorder in Strontium Barium Niobate | year=1996| pages=1435–1443 | journal=Journal of Materials Science | doi=10.1007/bf00357850| last1=Trubelja | first1=M. P. | last2=Ryba | first2=E. | last3=Smith | first3=D. K. | issue=6 | bibcode=1996JMatS..31.1435T | s2cid=94242966 }} alongside incommensurate oxygen octahedral tilting {{Cite journal | volume=97 | title=Effects of A1/A2-sites Occupancy upon Ferroelectric Transition in (SrxBa1-x)Nb2O6 Tungsten Bronze Ceramics | year=2014 | pages=507–512 | journal=Journal of the American Ceramic Society | doi=10.1111/jace.12659}}

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 {{cite journal| last1=Lee| first1=H.-Y.|last2=Freer|first2=R.| title= The mechanism of abnormal grain growth in Sr_0.6Ba_0.4Nb₂O₆ ceramics| journal=J. Appl. Phys.| year=1997| volume=81| issue = 1| pages=376–382|doi = 10.1063/1.364122|bibcode=1997JAP....81..376L}}