Novel Method of Search for Transparent Optical Materials with Extremely High Melting Point

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We propose a novel crystal growth method, "Core Heating (CH) Method", which is suitable for a search of novel materials with extremely high melting points above the melting (softening) point of an Ir crucible. As a feasibility test of the novel CH method, we fabricated the conventional material, (Y0.99Ce0.01)3Al5O12 (Ce:YAG), with a melting point of ∼1970 °C, because this material can be grown by the conventional melt growth technique like the micropulling down (μ-PD) method for the comparison. We compared scintillation properties for Ce:YAG prepared by the CH and μ-PD methods in order to find if the CH method can be applied to the material search. The crystals grown by both methods showed the YAG single-phase, and almost all their optical and scintillation properties of them were comparable for both samples. Particularly, the light output of Ce:YAG crystal grown by the CH method (20,000 ± 1,000 photons/MeV) was similar to that of the sample grown by the μ-PD method (23,000 ± 1,000 photons/MeV). Therefore, we concluded that the CH method is a useful technique for the search of scintillation materials with extremely high melting points.

Original languageEnglish
Pages (from-to)572-578
Number of pages7
JournalCrystal Growth and Design
Issue number1
Publication statusPublished - 2021 Jan 6

ASJC Scopus subject areas

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


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