The Electrical Conductivity of Solid Lithium Hydride Doped with Sulphur

Ptashnik, V.B.; Dunaeva, T.Y.; Baǐkov, Yu. M.

doi:10.1002/pssb.2221100249

Cited by 7 publications

(8 citation statements)

References 4 publications

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“…For congruent lithium niobate a wide range of data exists for lithium diffusion coefficients, e.g. [13][14][15]. The lithium diffusion coefficient for congruent LiNbO 3 from the present work fits well into this range of data.…”

Section: Electrical Propertiessupporting

confidence: 65%

Transport and Electromechanical Properties of Stoichiometric Lithium Niobate at High Temperatures

Weidenfelder¹,

Fritze

Fielitz

et al. 2012

Zeitschrift Für Physikalische Chemie

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Stoichiometric Lithium Niobate / Transport Mechanism / Electromechanical Properties / Oxygen-18 Tracer DiffusionZ-and X-cut lithium niobate samples with varying lithium content from 48.3 to 50.0 mol % are investigated at high temperatures. Electrical and electromechanical properties are obtained by impedance spectroscopy. Mixed ionic and electronic conductivity in the temperature range from 500-900 • C is found to be thermally activated. For 700 • C and 1000 • C the diffusion coefficient of lithium ions is calculated. The resonance frequency and the inverse Qf product are determined as a function of temperature up to 900 • C for shear and thickness mode vibrations. In addition, the tracer diffusion of 18 O is investigated by SIMS/SNMS. The 18 O depth profile is analyzed and the lithium concentration dependent oxygen diffusion coefficient at 950 • C for 49.9 mol % Li 2 O is determined to be D O ≈ 3 × 10 −17 m 2 /s.

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Section: Electrical Propertiessupporting

confidence: 65%

Transport and Electromechanical Properties of Stoichiometric Lithium Niobate at High Temperatures

Weidenfelder¹,

Fritze

Fielitz

et al. 2012

Zeitschrift Für Physikalische Chemie

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“…73,74 The diffusion of Nb was also found to be much slower than that of lithium vacancies. 73,75,76 Therefore, it is probably much easier for an Er ion to move into a Li sublattice and stay there rather than to push Nb ions off their lattice sites during these kinetic processes; this would make the incorporation of Er on a Nb site difficult.…”

Section: Relations To Experimentsmentioning

confidence: 99%

Structure and energetics of Er defects inLiNbO3from first-principles and thermodynamic calculations

Lee

Sinnott

et al. 2009

Phys. Rev. B

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The effects of Er defects on the structure and energetics of LiNbO 3 are determined using electronic-structure calculations at the level of density-functional theory combined with thermodynamic calculations. It is found that under both Li 2 O-rich and Nb 2 O 5 -rich conditions, Er 3+ sits on the Li site and is displaced along the uniaxial direction of the hexagonal structure toward the vacant cation site. The charge compensation mechanism is predicted to be lithium vacancies under Nb 2 O 5 -rich conditions, consistent with a previous conjecture; charge compensation is predicted to be by Er 3+ on a Nb site under Li 2 O-rich conditions. It is also found that low concentration of lithium vacancies could significantly affect the defect chemistry: when a Li-poor congruent sample is converted to the stoichiometric, there may be a negligible concentration of Er on Nb sites. The diffusivity and average diffusion distance under annealing of defects are also discussed.

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“…The only studies on Li diffusion based on mass tracers are limited to single crystalline LiNbO 3 [13][14][15]. Consequently, in the present study Li self-diffusion studies are carried out on amorphous lithium niobate at temperatures between 298 and 423 K using secondary ion mass spectrometry.…”

Section: Introductionmentioning

confidence: 99%

Self-Diffusion of Lithium in Amorphous Lithium Niobate Layers

Rahn¹,

Hüger

Dörrer

et al. 2012

Zeitschrift Für Physikalische Chemie

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We investigated lithium self-diffusion in amorphous lithium niobate layers between 298 and 423 K. For the experiments, amorphous 6 LiNbO 3 / 7 LiNbO 3 isotope hetero-structures were deposited by ion beam sputtering and analysed after diffusion annealing by secondary ion mass spectrometry (SIMS). This arrangement allows one to study pure isotope interdiffusion. The results show that the diffusivities obey the Arrhenius law with an activation enthalpy of 0.7 eV, which is considerably lower than the activation enthalpy found for LiNbO 3 single crystals in literature. Consequently, the Li diffusivities are higher by at least eight orders of magnitude in the amorphous samples in the temperature range studied.

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The Electrical Conductivity of Solid Lithium Hydride Doped with Sulphur

Cited by 7 publications

References 4 publications

Transport and Electromechanical Properties of Stoichiometric Lithium Niobate at High Temperatures

Transport and Electromechanical Properties of Stoichiometric Lithium Niobate at High Temperatures

Structure and energetics of Er defects inLiNbO3from first-principles and thermodynamic calculations

Self-Diffusion of Lithium in Amorphous Lithium Niobate Layers

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