Transport and Electromechanical Properties of Stoichiometric Lithium Niobate at High Temperatures

被引：7

作者：

Weidenfelder, Anke ^{[1
]}

Fritze, Holger ^{[1
]}

Fielitz, Peter ^{[2
]}

Borchardt, Guenter ^{[2
]}

Shi, Jianmin ^{[3
]}

Becker, Klaus-Dieter ^{[3
]}

Ganschow, Steffen ^{[4
]}

机构：

[1] Tech Univ Clausthal, Inst Energieforsch & Phys Technol, D-38640 Goslar, Germany

[2] Tech Univ Clausthal, Inst Met, D-38678 Clausthal Zellerfeld, Germany

[3] Tech Univ Carolo Wilhelmina Braunschweig, Inst Phys & Theoret Chem, D-38106 Braunschweig, Germany

[4] Leibniz Inst Kristallzuchtung, D-2489 Berlin, Germany

来源：

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS | 2012年 / 226卷 / 5-6期

关键词：

Stoichiometric Lithium Niobate; Transport Mechanism; Electromechanical Properties; Oxygen-18 Tracer Diffusion; LINBO3; CRYSTALS; DIFFUSION; NANOCRYSTALLINE; DEPENDENCE; NMR;

D O I：

10.1524/zpch.2012.0219

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Z- 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 degrees C is found to be thermally activated. For 700 degrees C and 1000 degrees 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 degrees C for shear and thickness mode vibrations. In addition, the tracer diffusion of O-18 is investigated by SIMS/SNMS. The O-18 depth profile is analyzed and the lithium concentration dependent oxygen diffusion coefficient at 950 degrees C for 49.9 mol % Li2O is determined to be D-O approximate to 3 x 10(-17) m(2)/s.

引用

页码：421 / 429

页数：9

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