Diffusion of niobium in congruent lithium niobate

被引：0
|
作者：
Born, E. [1 ]
Hornsteiner, J. [2 ]
Metzger, T. [2 ]
Riha, E. [3 ]
机构：
[1] Lehrstuhl für Angewandte Mineralogie und Geochemie, Technische Universität Müchen, Lichtenbergstr. 4, D-85747 Garching, Germany
[2] SIEMENS-MATSUSHITA, Anzingerstr. 13, D-81617 München, Germany
[3] SIEMENS AG, Zentralbereich Technik, München Perlach, Otto-Hahn-Ring 6, D-81739 München, Germany
来源：
| 2000年 / Wiley-VCH Verlag Berlin GmbH, Weinheim, Germany卷 / 177期
关键词：
Crystal defects - Crystal lattices - Diffusion in solids - Epitaxial growth - Lithium niobate - Phase diagrams - Phase separation;
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摘要：
According to the phase diagram of lithium niobate (LN) a decomposition of congruently melting LN with segregation of a niobium rich phase LiNb3O8 (L3N) has been observed. It occurs at the surface and at defects within the LN crystals at temperatures significantly higher than 300 °C. L3N crystals grow epitaxially towering the wafer surface and decorating defects within the bulk. Thus a niobium (NbLi) diffusion besides the lithium (LiLi, Livac) diffusion out of the bulk and at the surface is concluded. Moreover, shallow grooves surrounding the L3N segregation at the surface indicate a NbNb diffusion only at the surface and along crystal defects. Niobium (NbLi) diffusion pathways in the lattice are discussed.
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