The Melt Properties of LiNbO_3 Looking Through Viscosity(<Special Issue>)Bulk Crystal Growth(II))

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  • 粘性からみたLiNbO_3融液の特性(<特集>バルク成長(II))
  • 粘性からみたSiNbO3融液の特性
  • ネンセイ カラ ミタ SiNbO3 ユウエキ ノ トクセイ

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The reported measurements of the viscosity of molten LiNbO_3 were surveyed. Advantages and disadvantages of each of the employed methods were discussed. The activation energies for viscous flow calculated from the temperature dependences of the viscosity under various conditions were compared with each other. The relation-ship between the viscous flow unit and the local ordering, which was suggested by an X-ray scattering experiment, in LiNbO_3 melt in air, was discussed. The variations of the energy and the unit size were interpreted in terms of the variation in number of oxygen atoms bridging the niobium atoms. Necessity of the research of melt proper-ties in relation to crystal growth was emphasized to be carried out by two or more different methods.

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