Growth and crystallinity of shaped and multiple sapphire crystals by a micro-pulling-down method

Yuui Yokota, Valery Chani, Masato Sato, Kazushige Tota, Ko Onodera, Takayuki Yanagida, Akira Yoshikawa

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

We developed a growth technique of shape-controlled and multiple crystals by a micro-pulling-down (μ-PD) method using a developed special configuration crucible. A square tube-shaped sapphire crystal was grown with a molybdenum crucible with square tube die of 4 mm×4 mm outer periphery and 2 mm×2 mm inner periphery on the bottom. In contrast, six multiple square-shaped sapphire crystals were simultaneously grown by a molybdenum crucible with six circularly arranged square-shaped dies with a size of 2×2 mm2 on the bottom. Growth of six multiple square-shaped sapphire crystals indicated a single phase of α-Al2O 3 and almost same lattice parameters by X-ray diffraction measurement. Crystallinities of the six crystals were high in all positions of crystals comparable to the crystals grown by the Czochralski method.

Original languageEnglish
Pages (from-to)983-986
Number of pages4
JournalJournal of Crystal Growth
Volume318
Issue number1
DOIs
Publication statusPublished - 2011 Mar 1

Keywords

  • A1. Characterization
  • A2. Growth from melt
  • A2. Single crystal growth
  • B1. Sapphire

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry

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