Partitioning of ionic species and crystallization electromotive force during the melt growth of LiNbO3 and Li2B4O7

Shinji Koh; Satoshi Uda; Xinming Huang

doi:10.1016/j.jcrysgro.2007.05.008

Partitioning of ionic species and crystallization electromotive force during the melt growth of LiNbO₃ and Li₂B₄O₇

Shinji Koh, Satoshi Uda, Xinming Huang

Materials Development Division

Research output: Contribution to journal › Article › peer-review

12 Citations (Scopus)

Abstract

The dependence of the crystallization electromotive force (EMF) on the Li₂O composition of the melt in the growth of LiNbO₃ (LN) and Li₂B₄O₇ (LB4) crystals was measured using a micro-pulling-down (μ-PD) method. The crystallization EMF developed during the growth of LN crystals continuously decreased with increase in Li₂O composition. The eutectic compositions in the Li₂O-Nb₂O₅ system were found to be peculiar compositions, at which the development of the crystallization EMF was prevented owing to no degree of freedom in the Gibbs phase rule. It was found that no segregation of the ionic species occurred in the LB4 growth from the melt with the stoichiometric composition, which suggested that the equilibrium partitioning coefficients for all the chemical species in the stoichiometric LB4 melt were unity.

Original language	English
Pages (from-to)	406-412
Number of pages	7
Journal	Journal of Crystal Growth
Volume	306
Issue number	2
DOIs	https://doi.org/10.1016/j.jcrysgro.2007.05.008
Publication status	Published - 2007 Aug 15

Keywords

A1. Electric fields
A1. Interfaces
A2. Micro-pulling-down growth
B1. Borates
B1. Lithium compounds
B1. Niobates

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

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title = "Partitioning of ionic species and crystallization electromotive force during the melt growth of LiNbO3 and Li2B4O7",

abstract = "The dependence of the crystallization electromotive force (EMF) on the Li2O composition of the melt in the growth of LiNbO3 (LN) and Li2B4O7 (LB4) crystals was measured using a micro-pulling-down (μ-PD) method. The crystallization EMF developed during the growth of LN crystals continuously decreased with increase in Li2O composition. The eutectic compositions in the Li2O-Nb2O5 system were found to be peculiar compositions, at which the development of the crystallization EMF was prevented owing to no degree of freedom in the Gibbs phase rule. It was found that no segregation of the ionic species occurred in the LB4 growth from the melt with the stoichiometric composition, which suggested that the equilibrium partitioning coefficients for all the chemical species in the stoichiometric LB4 melt were unity.",

keywords = "A1. Electric fields, A1. Interfaces, A2. Micro-pulling-down growth, B1. Borates, B1. Lithium compounds, B1. Niobates",

author = "Shinji Koh and Satoshi Uda and Xinming Huang",

year = "2007",

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doi = "10.1016/j.jcrysgro.2007.05.008",

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T1 - Partitioning of ionic species and crystallization electromotive force during the melt growth of LiNbO3 and Li2B4O7

AU - Koh, Shinji

AU - Uda, Satoshi

AU - Huang, Xinming

PY - 2007/8/15

Y1 - 2007/8/15

N2 - The dependence of the crystallization electromotive force (EMF) on the Li2O composition of the melt in the growth of LiNbO3 (LN) and Li2B4O7 (LB4) crystals was measured using a micro-pulling-down (μ-PD) method. The crystallization EMF developed during the growth of LN crystals continuously decreased with increase in Li2O composition. The eutectic compositions in the Li2O-Nb2O5 system were found to be peculiar compositions, at which the development of the crystallization EMF was prevented owing to no degree of freedom in the Gibbs phase rule. It was found that no segregation of the ionic species occurred in the LB4 growth from the melt with the stoichiometric composition, which suggested that the equilibrium partitioning coefficients for all the chemical species in the stoichiometric LB4 melt were unity.

AB - The dependence of the crystallization electromotive force (EMF) on the Li2O composition of the melt in the growth of LiNbO3 (LN) and Li2B4O7 (LB4) crystals was measured using a micro-pulling-down (μ-PD) method. The crystallization EMF developed during the growth of LN crystals continuously decreased with increase in Li2O composition. The eutectic compositions in the Li2O-Nb2O5 system were found to be peculiar compositions, at which the development of the crystallization EMF was prevented owing to no degree of freedom in the Gibbs phase rule. It was found that no segregation of the ionic species occurred in the LB4 growth from the melt with the stoichiometric composition, which suggested that the equilibrium partitioning coefficients for all the chemical species in the stoichiometric LB4 melt were unity.

KW - A1. Electric fields

KW - A1. Interfaces

KW - A2. Micro-pulling-down growth

KW - B1. Borates

KW - B1. Lithium compounds

KW - B1. Niobates

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