Investigation of a Tb-doped HfO2 single crystal grown by a skull melting method

Shunsuke Kurosawa, Yoshisuke Futami, Vladimir V. Kochurikhin, Mikhail A. Borik, Yuui Yokota, Takayuki Yanagida, Akira Yoshikawa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

HfO2 has high effective atomic number and no radioactive-isotope as the background source, and it can be the candidate for the high-stopping scintillator instead of Lu2SiO5:Ce scintillator used in medical imaging, astronomy and etc. However, HfO2 has an extremely high melting point of 2774 °C, and it is difficult to grow the crystal from the melt using crucible, as there is no suitable metals, which can survive around that temperature. Thus, Czochralski, Bridgman, and micro-pulling down method cannot be applied. Therefore we investigated optical properties of a 17-mol% b-doped (stabilized) HfO2 crystal grown by the skull melting method, and this crystal had a high refractive index of 2.5 at 550 nm, and the maximum emission peak at ∼550 nm from 5D4 excited states of Tb3+. In addition, we found the radiation reaction of the crystal irradiated with alpha and gamma rays measuring with a photomultiplier.

Original languageEnglish
Title of host publicationMaterials Integration
PublisherTrans Tech Publications Ltd
Pages81-86
Number of pages6
ISBN (Print)9783037853764
DOIs
Publication statusPublished - 2012
EventInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011 - Sendai, Japan
Duration: 2011 Dec 12011 Dec 2

Publication series

NameKey Engineering Materials
Volume508
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

OtherInt. Symposium of GCOE: Materials Integration, in Conjunction with the 2nd Int. Symposium on Advanced Synthesis and Processing Technology for Materials, ASPT 2011 and the 8th Materials Science School for Young Scientists, KINKEN-WAKATE 2011
CountryJapan
CitySendai
Period11/12/111/12/2

Keywords

  • High melting temperature materials
  • Single crystal growth
  • Skull melting method

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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