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2022 Fiscal Year Final Research Report

Properties of steps as key factors to control the interface during crystal growth ; its measurement and thermodynamic model

Research Project

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Project/Area Number 19H00820
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 26:Materials engineering and related fields
Research InstitutionThe University of Tokyo

Principal Investigator

Yoshikawa Takeshi  東京大学, 生産技術研究所, 准教授 (90435933)

Co-Investigator(Kenkyū-buntansha) 柴田 千尋  法政大学, 理工学部, 准教授 (00633299)
竹島 由里子  東京工科大学, メディア学部, 教授 (20313398)
三浦 均  名古屋市立大学, 大学院理学研究科, 准教授 (50507910)
川西 咲子  東北大学, 多元物質科学研究所, 助教 (80726985)
三谷 武志  国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 主任研究員 (90586306)
Project Period (FY) 2019-04-01 – 2023-03-31
Keywords高温溶液成長 / 界面その場観察 / シリコンカーバイド / ステップエネルギー
Outline of Final Research Achievements

In this study, in order to enable scientific understanding and control of the step structure of the crystal growth interface during the growth of single crystals in high temperature solution, we aimed to establish a quantitative observation method for the shape of the high temperature interface, and targeted to clarify the physical properties of the step.
By optimizing the observation system and examining image analysis techniques, we established a program to quantitatively evaluate submicron changes in crystal thickness. It made it possible to measure the solubility more accurately than the conventional measurement method. In addition, we constructed a diffusion-controlled crystal growth environment that is more suitable for evaluating step properties. Then, we evaluated the step physical properties in multiple solvent systems, mainly Si-Cr systems.

Free Research Field

高温物理化学

Academic Significance and Societal Importance of the Research Achievements

高温溶液成長法は、SiCや窒化物材料の従来法と異なる結晶育成技術として注目を集める。気相成長法や融液成長法とは異なる界面成長機構が存在し、溶液組成と関連した成長が進行する。本研究で、界面をより高精度に観察解析する技術を構築したこと、また拡散支配型の結晶成長環境を構築することで、界面物性を評価する技術を確立したことは高温界面科学の未知の部分の評価につながるとともに、結晶成長の制御手法の確立につながる。

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Published: 2024-01-30  

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