Comprehensive study of crystallization and phase formation in (La,Gd) BGeO_5 glass(<Feature>Glass and Ceramic Materials for Photonics)

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概要

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• The glasses with (25-x) La_2O_3・xGd_2O_3・25B_2O_3・50GeO_2 composition corresponding to the (La,Gd) BGeO_5 were prepared, and the substitution effect of gadolinium ions (Gd^<3+>) on crystallization behavior and phase formation was examined by DTA, XRD and Raman techniques in detail. Ferroelectric (La,Gd) BGeO_5 phase with hexagonal stillwellite structure were crystallized in the composition range of x=0_15. Although no significant change in physical properties was observed in the whole composition range, crystallization behavior was drastically changed as the progressive substitution of Gd^<3+> was carried out (i.e., crystallization of monoclinic phase of (La,Gd) BGeO_5 and high-pressure phase of Gd_2Ge_2O_7 with a triclinic structure). Structure of the glasses and crystallized phases, and the phase formation mechanism were also discussed.

• 社団法人日本セラミックス協会の論文
• 2008-10-01

著者

• TAKAHASHI YOSHIHIRO

  Department of Pediatrics, Odate Municipal General Hospital

• FUJIWARA Takumi

  Department of Applied Physics, Tohoku University

• Fujiwara Tamiya

  Deparment Of Electrical And Electronic Engineering Iwate University

• TAKAHASHI Yoshikazu

  Ibaraki Prefectural University of Health Sciences

• Takahashi Y

  Ulvac Japan Ltd. Ibaraki Jpn

• Takahashi Yoshihiro

  Department Of Applied Physics School Of Engineering Tohoku University

• 紅野 安彦

  Graduate School Of Environmental Sci. Okayama Univ.

• KOMATSU Takayuki

  Department of Materials Science and Technology, Nagaoka University of Technology

• BENINO Yasuhiko

  Graduate School of Environmental Science, Okayama University

• Fujiwara T

  Department Of Electrical Engineering Faculty Of Engineering Iwate University

• Fujiwara T

  Department Of Applied Physics School Of Engineering Tohoku University

• Fujiwara T

  Toyota Technological Inst. Nagoya Jpn

• Takahashi Y

  Tanaka Solid Junction Project Erato Japan Science And Research Corporation

• Fujiwara Takumi

  Department Of Applied Physics School Of Engineering Tohoku University

• Takahashi Yoichi

  Department Of Nuclear Engineering Faculty Of Engineering University Of Tokyo

• Takahashi Yukihiro

  Central Research Laboratory Matsushita Electric Industrial Co. Ltd.

• Takahashi Y

  Department Of Applied Physics School Of Engineering Tohoku University

• Takahashi Yoshinori

  Division Of Electrical Electronic And Information Engineering Osaka University

• Takahashi Y

  National Inst. Animal Health Ibaraki Jpn

• Komatsu T

  Department Of Materials Science And Technology Nagaoka University Of Technology

• Komatsu Takayuki

  Department Of Chemistry Nagaoka University Of Technology

• Takahashi Y

  Department Of Molecular & Materials Sciences Kyushu University

• Fujiwara Takumi

  Dep. Of Applied Physics Tohoku Univ.

• Takahashi Yoshihiro

  Department Of Applied Physics Osaka City University

• Benino Yasuhiko

  Graduate School Of Environmental Sci. Okayama Univ.

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