TY - JOUR
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
N1 - Funding Information:
This work was supported in part by the Ministry of Education, Culture, Sports, Science and Technology, Grants-in-Aid for Scientific Research on Exploratory Research (No. 18656002) and in part by the Nippon Sheet Glass Foundation for Materials Science and Engineering.
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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U2 - 10.1016/j.jcrysgro.2007.05.008
DO - 10.1016/j.jcrysgro.2007.05.008
M3 - Article
AN - SCOPUS:34547662348
VL - 306
SP - 406
EP - 412
JO - Journal of Crystal Growth
JF - Journal of Crystal Growth
SN - 0022-0248
IS - 2
ER -