Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.optmat.2003.12.027
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dc.titleAnisotropic thermal expansion of stoichiometric lithium niobate crystals grown along the normal direction of facets
dc.contributor.authorXu, X.
dc.contributor.authorChong, T.-C.
dc.contributor.authorSolanki, S.
dc.contributor.authorLiang, X.
dc.contributor.authorYuan, S.
dc.date.accessioned2014-10-07T04:41:50Z
dc.date.available2014-10-07T04:41:50Z
dc.date.issued2004-09
dc.identifier.citationXu, X., Chong, T.-C., Solanki, S., Liang, X., Yuan, S. (2004-09). Anisotropic thermal expansion of stoichiometric lithium niobate crystals grown along the normal direction of facets. Optical Materials 26 (4) : 489-494. ScholarBank@NUS Repository. https://doi.org/10.1016/j.optmat.2003.12.027
dc.identifier.issn09253467
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/83491
dc.description.abstractIn this paper, a stoichiometric lithium niobate (SLN) crystal with the size up to 20×20×18 mm3 was grown along the normal direction of the (012) facet from the 16 mol% K2O fluxed melt by the top-seeded solution growth method. The anisotropic thermal expansion of the SLN crystal and congruent lithium niobate (CLN) crystal was measured along different directions by using a Shimadzu thermomechanical analyzer. As compared with CLN, the SLN crystal exhibited slightly larger thermal expansion along the Z-axis and slightly smaller expansion along the X-axis. Both the SLN and CLN crystals showed strong anisotropy in the thermal expansion. The thermal expansion coefficient of SLN along the X-axis (∼16.7×10-6 °C -1 at 300 °C) is much larger than that along the Z-axis (∼2.5×10-6 °C-1 at 300 °C). Based on the experimental data and polynomial fitting results, we calculated the thermal expansion coefficients for different directions. In the case of growing the SLN crystal along the normal direction of (012) facet, we studied the radial anisotropic thermal expansion and discussed the cracking problem of the crystal according to its actual growth morphology. It is found that the cracks of SLN can be suppressed by growing the crystal along the W-axis due to its reduced radial anisotropy in the thermal expansion. © 2004 Elsevier B.V. All rights reserved.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1016/j.optmat.2003.12.027
dc.sourceScopus
dc.subjectAnisotropic thermal expansion
dc.subjectPhotorefractive material
dc.subjectStoichiometric lithium niobate
dc.subjectTop-seeded solution growth
dc.typeConference Paper
dc.contributor.departmentELECTRICAL & COMPUTER ENGINEERING
dc.description.doi10.1016/j.optmat.2003.12.027
dc.description.sourcetitleOptical Materials
dc.description.volume26
dc.description.issue4
dc.description.page489-494
dc.description.codenOMATE
dc.identifier.isiut000224046700026
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