Czochralski growth of 12CaO·7Al2O3 crystals

Kazuhisa Kurashige, Yoshitake Toda, Satoru Matstuishi, Katsuro Hayashi, Masahiro Hirano, Hideo Hosono

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62 Citations (Scopus)


Single crystals of nanoporous 12CaO·7Al2O3 (C12A7) as large as 27 mm in diameter, 120 mm in length, and 207 g in weight have been successfully grown by the Czochralski method. We found that a 2.0% oxygen-containing nitrogen atmosphere and an iridium crucible are the critical factors for success. The crystal ingot exhibited an orange color resulting from the incorporation of Ir4+ ions of ca. 5 × 1017 cm-3, which presumably occupy Ca2+ sites. X-ray diffraction analysis indicated that the ingot obtatined was a single crystal with few domains.

Original languageEnglish
Pages (from-to)1602-1605
Number of pages4
JournalCrystal Growth and Design
Issue number7
Publication statusPublished - Jul 1 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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