Ternary system Li2O–K2O–Nb2O5

Cochez, M.; Ferriol, M.; Pöppl, L.; Polgár, K.; Péter, Á.

doi:10.1016/j.jallcom.2004.04.150

Cited by 13 publications

(20 citation statements)

References 14 publications

(21 reference statements)

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“…1 as presented in Part I [8]. Accordingly, the LiNbO 3 liquidus surface is well determined above the LiNbO 3 -KNbO 3 join, but beyond it and for Nb 2 O 5 contents higher than 50-55mol%, the outlined equilibrium domains are only estimated.…”

Section: Assessment Of the Phase Diagram By Crystal Growth Experimentsmentioning

confidence: 85%

“…from fluxes with starting composition of a [Li]/[Nb] ratio equal/or near to 1 and with various potassium oxide contents [5][6][7][8][9][10]. In the present work, growth experiments have been conducted from various fluxes listed in Table 1.…”

Section: Assessment Of the Phase Diagram By Crystal Growth Experimentsmentioning

confidence: 99%

“…In previous works [7][8], we reported phase equilibrium studies on the ternary system Li 2 O-K 2 O-Nb 2 O 5 . Part I [8] of this work presents in detail the solid-liquid equilibria near the LiNbO 3 compound.…”

Section: Introductionmentioning

confidence: 99%

“…Part I [8] of this work presents in detail the solid-liquid equilibria near the LiNbO 3 compound. In this report, based on the results of these studies, some issues of the stoichiometric LN single crystal formation are treated:…”

Section: Introductionmentioning

confidence: 99%

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Ternary system Li2O–K2O–Nb2O5

Péter

Polgár

Ferriol

et al. 2005

Journal of Alloys and Compounds

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Section: Assessment Of the Phase Diagram By Crystal Growth Experimentsmentioning

confidence: 85%

Section: Assessment Of the Phase Diagram By Crystal Growth Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Ternary system Li2O–K2O–Nb2O5

Péter

Polgár

Ferriol

et al. 2005

Journal of Alloys and Compounds

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“…In this section, the current state of sLN crystal growth will be reviewed, and based on the results of Cochez et al, 25 P eter et al, 26 and Dravecz et al 27 on high-temperature phase equilibria of Li 2 O-Nb 2 O 5 -X 2 O (X ¼ Na, K, Rb, Cs) ternary systems, the impact of alkali homologue additives (Li/Na/K/ Rb/Cs) on the stoichiometry of the lithium niobate phase will be discussed. In addition, the effect of ODR dopants on the growth of sLN crystals will be summarized.…”

Section: Growth Of Stoichiometric Linbo 3 a Early Workmentioning

confidence: 99%

Growth, defect structure, and THz application of stoichiometric lithium niobate

Lengyel

Péter

Kovács

et al. 2015

Applied Physics Reviews

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104

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Owing to the extraordinary richness of its physical properties, congruent lithium niobate has attracted multidecade-long interest both for fundamental science and applications. The combination of ferro-, pyro-, and piezoelectric properties with large electro-optic, acousto-optic, and photoelastic coefficients as well as the strong photorefractive and photovoltaic effects offers a great potential for applications in modern optics. To provide powerful optical components in high energy laser applications, tailoring of key material parameters, especially stoichiometry, is required. This paper reviews the state of the art of growing large stoichiometric LiNbO 3 (sLN) crystals, in particular, the defect engineering of pure and doped sLN with emphasis on optical damage resistant (ODR) dopants (e.g., Mg, Zn, In, Sc, Hf, Zr, Sn). The discussion is focused on crystals grown by the high temperature top seeded solution growth (HTTSSG) technique using alkali oxide fluxing agents. Based on high-temperature phase equilibria studies of the Li 2 O-Nb 2 O 5 -X 2 O ternary systems (X ¼ Na, K, Rb, Cs), the impact of alkali homologue additives on the stoichiometry of the lithium niobate phase will be analyzed, together with a summary of the ultraviolet, infrared, and far-infrared absorption spectroscopic methods developed to characterize the composition of the crystals. It will be shown that using HTTSSG from K 2 O containing flux, crystals closest to the stoichiometric composition can be grown characterized by a UV-edge position of at about 302 nm and a single narrow hydroxyl band in the IR with a linewidth of less than 3 cm À1 at 300 K. The threshold concentrations for ODR dopants depend on crystal stoichiometry and the valence of the dopants; Raman spectra, hydroxyl vibration spectra, and Z-scan measurements prove to be useful to distinguish crystals below and above the photorefractive threshold. Crystals just above the threshold are preferred for most nonlinear optical applications apart holography and have the additional advantage to minimize the absorption even in the far-infrared (THz) range. The review also provides a discussion on the progress made in the characterization of non-stoichiometry related intrinsic and extrinsic defect structures in doped LN crystals, with emphasis on ODR-ion-doped and/or closely stoichiometric systems, based on both spectroscopic measurements and theoretical modelling, including the results of first principles quantum mechanical calculations on hydroxyl defects. It will also be shown that new perspective applications, e.g., the generation of high energy THz pulses with energies on the tens-of-mJ scale, are feasible with ODR-doped sLN crystals if optimal conditions, including the contact grating technique, are applied. V C 2015 AIP Publishing LLC.

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