Effect of growth atmosphere on convection in LiTaO3 melt

Yasunori Okano; Yoichi Tsuji; Dae Ho Yoon; Tsuguo Fukuda

Effect of growth atmosphere on convection in LiTaO₃ melt

Yasunori Okano, Yoichi Tsuji, Dae Ho Yoon, Tsuguo Fukuda

Tohoku University

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

7 Scopus citations

Abstract

The effect of atmosphere on convection in melt during the Czochralski growth of LiTaO₃ single crystals was studied by observing the flow at the melt surface, and by measuring the temperature fluctuations in the melt in N₂ and N₂ + 0.5 vol% O₂ atmosphere. The convection in the N₂ atmosphere was stronger than that in the N₂ + O₂ atmosphere. By measuring the emitted spectra from the melt surfaces, it was observed that the melt in the N₂ + O₂ atmosphere was almost transparent, while the melt in the N₂ atmosphere was optically absorbent. In general, the results indicate that temperature gradient in the melt under the N₂ + O₂ atmosphere becomes small because of internal radiation through the melt, compared with the temperature gradient under the N₂ atmosphere.

Original language	English
Pages (from-to)	41-44
Number of pages	4
Journal	Journal of Materials Processing and Manufacturing Science
Volume	4
Issue number	1
State	Published - Jul 1995
Externally published	Yes

Cite this

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title = "Effect of growth atmosphere on convection in LiTaO3 melt",

abstract = "The effect of atmosphere on convection in melt during the Czochralski growth of LiTaO3 single crystals was studied by observing the flow at the melt surface, and by measuring the temperature fluctuations in the melt in N2 and N2 + 0.5 vol\% O2 atmosphere. The convection in the N2 atmosphere was stronger than that in the N2 + O2 atmosphere. By measuring the emitted spectra from the melt surfaces, it was observed that the melt in the N2 + O2 atmosphere was almost transparent, while the melt in the N2 atmosphere was optically absorbent. In general, the results indicate that temperature gradient in the melt under the N2 + O2 atmosphere becomes small because of internal radiation through the melt, compared with the temperature gradient under the N2 atmosphere.",

author = "Yasunori Okano and Yoichi Tsuji and Yoon, \{Dae Ho\} and Tsuguo Fukuda",

year = "1995",

month = jul,

language = "English",

volume = "4",

pages = "41--44",

journal = "Journal of Materials Processing and Manufacturing Science",

issn = "1062-0656",

publisher = "SAGE Publications Inc.",

number = "1",

}

TY - JOUR

T1 - Effect of growth atmosphere on convection in LiTaO3 melt

AU - Okano, Yasunori

AU - Tsuji, Yoichi

AU - Yoon, Dae Ho

AU - Fukuda, Tsuguo

PY - 1995/7

Y1 - 1995/7

N2 - The effect of atmosphere on convection in melt during the Czochralski growth of LiTaO3 single crystals was studied by observing the flow at the melt surface, and by measuring the temperature fluctuations in the melt in N2 and N2 + 0.5 vol% O2 atmosphere. The convection in the N2 atmosphere was stronger than that in the N2 + O2 atmosphere. By measuring the emitted spectra from the melt surfaces, it was observed that the melt in the N2 + O2 atmosphere was almost transparent, while the melt in the N2 atmosphere was optically absorbent. In general, the results indicate that temperature gradient in the melt under the N2 + O2 atmosphere becomes small because of internal radiation through the melt, compared with the temperature gradient under the N2 atmosphere.

AB - The effect of atmosphere on convection in melt during the Czochralski growth of LiTaO3 single crystals was studied by observing the flow at the melt surface, and by measuring the temperature fluctuations in the melt in N2 and N2 + 0.5 vol% O2 atmosphere. The convection in the N2 atmosphere was stronger than that in the N2 + O2 atmosphere. By measuring the emitted spectra from the melt surfaces, it was observed that the melt in the N2 + O2 atmosphere was almost transparent, while the melt in the N2 atmosphere was optically absorbent. In general, the results indicate that temperature gradient in the melt under the N2 + O2 atmosphere becomes small because of internal radiation through the melt, compared with the temperature gradient under the N2 atmosphere.

UR - https://www.scopus.com/pages/publications/0029332943

M3 - Article

AN - SCOPUS:0029332943

SN - 1062-0656

VL - 4

SP - 41

EP - 44

JO - Journal of Materials Processing and Manufacturing Science

JF - Journal of Materials Processing and Manufacturing Science

IS - 1

ER -

Effect of growth atmosphere on convection in LiTaO₃ melt

Abstract

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