Physicochemical and Optical Characteristics of LiNbO3 Single-Crystals Doped with Boron

被引：7
|
作者：
Palatnikov M.N. [1 ]
Sidorov N.V. [1 ]
Titov R.A. [1 ]
Teplyakova N.A. [1 ]
Makarova O.V. [1 ]
机构：
[1] Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Science Center, Russian Academy of Sciences, Apatity
来源：
Inorganic Materials: Applied Research | 2018年 / 9卷 / 05期
基金：
俄罗斯基础研究基金会;
关键词：
alloying; crystals; lithium niobate; photorefractive effect; Raman scattering;
D O I：
10.1134/S2075113318050222
中图分类号：
学科分类号：
摘要：
The chemical interaction in the Li2CO3–Nb2O5 and Li2O–B2O3–Nb2O5 systems and crystallization features of LiNbO3 crystals from the melts containing boron impurity are considered. Raman spectra of LiNbO3:B crystals grown from a congruent melt containing ~0.55–1.24 mol % of B2O3 are studied. There are noticeable changes in the entire Raman spectrum upon doping with boron, which indicates a change in alternation of the main cations and vacancies along the polar axis of the LiNbO3:B crystal and “perturbation” of oxygen octahedra. Moreover, expansion of oxygen octahedra is anisotropic with an increase in boron concentration in the melt. Boron, hardly entering the structure of the lithium niobate crystal, significantly changes the structure of the melt and thus has a significant effect on structure and physical characteristics of the LiNbO3:B crystals. The results obtained for the LiNbO3:B crystals are compared with those obtained for nominally pure stoichiometric (LiNbO3stoich) and congruent (LiNbO3cong) lithium niobate crystals. © 2018, Pleiades Publishing, Ltd.
引用
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页码：817 / 824
页数：7
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