Growth of shaped 12CaO×7Al2O3 crystals by the micro-pulling down method

Lijuan Liu, Yuji Kagamitani, Dirk Ehrentraut, Chiaki Yokoyama, Tsuguo Fukuda

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


12CaO×7Al2O3 (C12A7) single crystals have been successfully grown by the micro-pulling down method for the first time. Single and transparent C12A7 crystal was obtained with radio-frequency heating μ-PD system. Phase stability is discussed as a function of oxygen concentration in the growth atmosphere. A minimum 1.0 Vol% O2 with nitrogen atmosphere yields C12A7 phase. The distribution of Ca, Al and O elements at cross-section part was investigated by the electron probe microanalysis. The crystal composition deviation could be controlled by reducing O2 gas concentration to 1.0 Vol%.

Original languageEnglish
Pages (from-to)518-521
Number of pages4
JournalJournal of Crystal Growth
Issue number3
Publication statusPublished - 2009 Jan 15


  • A1. Crystal morphology
  • A2. Growth from melt
  • B1. Oxides

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Inorganic Chemistry
  • Materials Chemistry


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