Numerical and experimental studies on crack formation in LiNbO3 single crystal

T. Tsukada; K. Kakinoki; M. Hozawa; N. Imaishi; K. Shimamura; T. Fukuda

doi:10.1016/S0022-0248(97)00242-X

Numerical and experimental studies on crack formation in LiNbO₃ single crystal

T. Tsukada, K. Kakinoki, M. Hozawa, N. Imaishi, K. Shimamura, T. Fukuda

New Industry Creation Hatchery Center (NICHe)

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

30 Citations (Scopus)

Abstract

A global analysis of heat transfer was carried out in an inductively heated Czochralski (CZ) furnace which was actually used to grow LiNbO₃ single crystals, and then the temperature profiles obtained were used to calculate the three-dimensional thermal stress field in the crystal. By comparing the numerical results with the experimental ones, it was found that controlling the thermal environment in the CZ furnace so that the thermal stresses at the crystal surface might not exceed a certain value is important to realize the cracking free growth operation. In this study, this was accomplished through some modifications in the furnace design such as insertion of an after-heater into the furnace. These findings were verified by additional numerical simulations and crystal growth experiments for some growth conditions.

Original language	English
Pages (from-to)	543-550
Number of pages	8
Journal	Journal of Crystal Growth
Volume	180
Issue number	3-4
DOIs	https://doi.org/10.1016/S0022-0248(97)00242-X
Publication status	Published - 1997 Oct

Keywords

Crack formation
Czochralski method
Global analysis
Heat transfer
LiNbO
Thermal stress field

ASJC Scopus subject areas

Condensed Matter Physics
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/S0022-0248(97)00242-X

Cite this

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title = "Numerical and experimental studies on crack formation in LiNbO3 single crystal",

abstract = "A global analysis of heat transfer was carried out in an inductively heated Czochralski (CZ) furnace which was actually used to grow LiNbO3 single crystals, and then the temperature profiles obtained were used to calculate the three-dimensional thermal stress field in the crystal. By comparing the numerical results with the experimental ones, it was found that controlling the thermal environment in the CZ furnace so that the thermal stresses at the crystal surface might not exceed a certain value is important to realize the cracking free growth operation. In this study, this was accomplished through some modifications in the furnace design such as insertion of an after-heater into the furnace. These findings were verified by additional numerical simulations and crystal growth experiments for some growth conditions.",

keywords = "Crack formation, Czochralski method, Global analysis, Heat transfer, LiNbO, Thermal stress field",

author = "T. Tsukada and K. Kakinoki and M. Hozawa and N. Imaishi and K. Shimamura and T. Fukuda",

note = "Funding Information: The authors are grateful to Mr. T. Hirata for his cooperation in the experimental work. This work was supported partially by a Grant-in-Aid for Scientific Research (No. 05239106) from the Ministry of Education, Science and Culture, Japan.",

year = "1997",

month = oct,

doi = "10.1016/S0022-0248(97)00242-X",

language = "English",

volume = "180",

pages = "543--550",

journal = "Journal of Crystal Growth",

issn = "0022-0248",

publisher = "Elsevier",

number = "3-4",

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T1 - Numerical and experimental studies on crack formation in LiNbO3 single crystal

AU - Tsukada, T.

AU - Kakinoki, K.

AU - Hozawa, M.

AU - Imaishi, N.

AU - Shimamura, K.

AU - Fukuda, T.

N1 - Funding Information: The authors are grateful to Mr. T. Hirata for his cooperation in the experimental work. This work was supported partially by a Grant-in-Aid for Scientific Research (No. 05239106) from the Ministry of Education, Science and Culture, Japan.

PY - 1997/10

Y1 - 1997/10

N2 - A global analysis of heat transfer was carried out in an inductively heated Czochralski (CZ) furnace which was actually used to grow LiNbO3 single crystals, and then the temperature profiles obtained were used to calculate the three-dimensional thermal stress field in the crystal. By comparing the numerical results with the experimental ones, it was found that controlling the thermal environment in the CZ furnace so that the thermal stresses at the crystal surface might not exceed a certain value is important to realize the cracking free growth operation. In this study, this was accomplished through some modifications in the furnace design such as insertion of an after-heater into the furnace. These findings were verified by additional numerical simulations and crystal growth experiments for some growth conditions.

AB - A global analysis of heat transfer was carried out in an inductively heated Czochralski (CZ) furnace which was actually used to grow LiNbO3 single crystals, and then the temperature profiles obtained were used to calculate the three-dimensional thermal stress field in the crystal. By comparing the numerical results with the experimental ones, it was found that controlling the thermal environment in the CZ furnace so that the thermal stresses at the crystal surface might not exceed a certain value is important to realize the cracking free growth operation. In this study, this was accomplished through some modifications in the furnace design such as insertion of an after-heater into the furnace. These findings were verified by additional numerical simulations and crystal growth experiments for some growth conditions.

KW - Crack formation

KW - Czochralski method

KW - Global analysis

KW - Heat transfer

KW - LiNbO

KW - Thermal stress field

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