Properties and structure in environmentally Pb-free zero photoelastic phosphate glasses

• Project/Area Number: 17K05041
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Crystal engineering
• Research Institution: Ehime University
• Principal Investigator: Saitoh Akira 愛媛大学, 理工学研究科(工学系), 教授 (80431328)
• Project Period (FY): 2017-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
• Keywords: 光弾性定数 / 酸化物ガラス / 電子分極率 / 構造 / リン酸塩ガラス / ガラス構造 / 光ファイバー / 応力誘起複屈折 / 構造・機能材料

Outline of Final Research Achievements

We have investigated very small photoelastic and high refractive phosphate glasses using lead free composition. Also we have studied the structure showing the small photoelasticity to identify the role of the function. We have successfully found several glass compositions and have provided with the origin of the small photoelasticity. We have discussed the empirical/compositional parameter to design a polarization controlling optical glass from the viewpoint of electronic polarizability of constitute oxides.

Academic Significance and Societal Importance of the Research Achievements

酸化物ガラスの光学応用に関して，屈折率が大きい材料が重要視されるものの，光弾性定数を扱うことは少ない。ガラスの光弾性が，材料の電子物性だけではなく，ガラスを構成する原子の変位に根源とする機械的特性との両方に関係するからである。ガラスに応力を加えても，本来の屈折率の等方性が維持されるガラス組成(低光弾性ガラス)を見出すために，本研究では構成酸化物の電子分極率を軸とした組成設計が有効であることを示したことが学術的意義である。さらに，情報を偏光に乗せて伝搬させる光通信用光学素子において，光ファイバーのように外部の力が加わっても偏光が保持される光学材料探索，設計における一指針となることが期待される。

Research Products

• [Int'l Joint Research] リール大学(フランス)
• [Int'l Joint Research] ミズーリ工科大学(米国)
• [Int'l Joint Research] ロストック大学(ドイツ)
• [Int'l Joint Research] ISIS, Appleton(英国)
• [Int'l Joint Research] CSIS, Madrid(スペイン)
• [Int'l Joint Research] Missouri University Science & Technology(米国)
• [Int'l Joint Research] University Lille 1(France)
• [Int'l Joint Research] Rostock University(Germany)
• [Int'l Joint Research] ISIS(英国)
• [Journal Article] Durable BaO－ZnO－P2O5 glass with small stress induced birefringence for lead free polarization light controlling devices (2019)
  • Author(s): K. Kishimoto, G. Tricot, T. Atsumi, S. Murai, K. Tanaka, H.Takebe, and A. Saitoh
  • Journal Title: Int. J. Appl. Glass Sci. Volume: 11 Issue: 1 Pages: 27-34
  • DOI: 10.1111/ijag.13480
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Characterization of 20Na2O・30((1?x)CaO・xSrO)・50P2O5 glasses for a resorbable optical fiber application (2019)
  • Author(s): Freudenberger Parker T.、Saitoh Akira、Ikeda Hikaru、Adnan Md Shihab、Takebe Hiromichi、Nakane Shingo、Kim Chang-Soo、Brow Richard K.
  • Journal Title: International Journal of Applied Glass Science Volume: in press Issue: 3 Pages: 378-390
  • DOI: 10.1111/ijag.13106
  • Peer Reviewed
• [Journal Article] The structure and properties of xZnO-(67-x)SnO-33P2O5 glasses: (IV) Mechanical properties (2019)
  • Author(s): T. Okamoto, A. Saitoh,* P. Freudenberger, H. Takebe, and R. K. Brow
  • Journal Title: J. Non-Cryst. Solids Volume: 513 Pages: 44-48
  • DOI: 10.1016/j.jnoncrysol.2019.02.030
  • Peer Reviewed
• [Journal Article] Properties and Structure in Ternary Meta-, Pyro-, and Ortho-Zinc Tin Phosphate Glasses With Small Photoelasticity (2018)
  • Author(s): Saitoh Akira、Hashida Yuto、Tricot Gregory、Takebe Hiromichi
  • Journal Title: physica status solidi (b) Volume: 255 Issue: 10 Pages: 1800318-1800318
  • DOI: 10.1002/pssb.201800318
  • Peer Reviewed
• [Journal Article] Characterization and structure of a fiber of BaO?SnO?P2O5?B2O3 glass with a very small photoelastic constant (2018)
  • Author(s): Saitoh Akira、Itadani Masayuki、Kitani Suguru、Matsuishi Satoru、Sasaki Masaru、Kawaji Hitoshi、Hosono Hideo、Takebe Hiromichi
  • Journal Title: Japanese Journal of Applied Physics Volume: 57 Issue: 8 Pages: 080310-080310
  • DOI: 10.7567/jjap.57.080310
  • Peer Reviewed
• [Journal Article] The structure and properties of xZnO?(67-x)SnO?33P2O5 glasses: (II) Diffraction, NMR, and chromatographic studies (2018)
  • Author(s): Hoppe Uwe、Saitoh Akira、Tricot Gregory、Freudenberger Parker、Hannon Alex C.、Takebe Hiromichi、Brow Richard K.
  • Journal Title: Journal of Non-Crystalline Solids Volume: 492 Pages: 68-76
  • DOI: 10.1016/j.jnoncrysol.2018.04.017
  • Peer Reviewed
• [Journal Article] The structure and properties of x ZnO?(67- x )SnO?P 2 O 5 glasses: (I) optical and thermal properties, Raman and infrared spectroscopies (2018)
  • Author(s): Saitoh Akira、Brow Richard K.、Hoppe Uwe、Tricot Gr?gory、Anan Shoji、Takebe Hiromichi
  • Journal Title: J. Non-Cryst. Solids Volume: 484 Pages: 132-138
  • DOI: 10.1016/j.jnoncrysol.2018.01.030
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Structure and properties of barium tin boro-phosphate glass systems with very low photoelastic constant (2017)
  • Author(s): Itadani M.、Tricot G.、Doumert B.、Takebe H.、Saitoh A.
  • Journal Title: J. Appl. Phys. Volume: 122 Issue: 8 Pages: 085102-085102
  • DOI: 10.1063/1.4998957
  • Peer Reviewed / Int'l Joint Research
• [Presentation] 低光弾性・良耐水性BaO-ZnO-P2O5ガラスの光学応用 (2020)
  • Author(s): 岸本 薫，斎藤 全，川崎優太
  • Organizer: 応用物理学会
• [Presentation] 亜鉛スズリン酸塩ガラスの機械的特性と構造 (2019)
  • Author(s): 岡本孟也，武部博倫，斎藤 全
  • Organizer: 第60回ガラスおよびフォトニクス材料討論会
• [Presentation] Photoelasticity in phosphate glasses (2019)
  • Author(s): A. Saitoh and H. Takebe
  • Organizer: 25th International Congress on Glass
  • Invited
• [Presentation] 多元系リン酸塩ガラスの光弾性特性 (2019)
  • Author(s): 冨原佑介，岸本 薫，武部博倫，斎藤 全
  • Organizer: 応用物理学会春季学術講演会
• [Presentation] Mechanical properties in heavy metal containing oxide glasses with small photoelastic constant (2019)
  • Author(s): T. Okamoto, H. Takebe, and A. Saitoh
  • Organizer: ICG Annual meeting 2018
  • Int'l Joint Research
• [Presentation] 亜鉛スズリン酸塩ガラスの機械的特性と構造 (2018)
  • Author(s): 岡本孟也，斎藤 全，武部博倫
  • Organizer: 応用物理学会春季学術講演会
• [Presentation] バリウム亜鉛リン酸塩ガラスの特性と構造 (2018)
  • Author(s): 岸本 薫，Gregory Tricot, 武部博倫，斎藤 全
  • Organizer: 応用物理学会秋季学術講演会
• [Presentation] BaO-SnO-P2O5系ガラスの光学的・熱的特性と構造 (2017)
  • Author(s): 板谷 雅之，Grégory Tricot, 武部 博倫，斎藤 全
  • Organizer: 第78回応用物理学会秋季学術講演会
• [Presentation] Optical and thermal properties of barium tin boro-phosphate glasses for optical fiber devises (2017)
  • Author(s): M. Itadani, G. Tricot, H. Takebe, and A. Saitoh
  • Organizer: Borate-phosphate 2017
  • Int'l Joint Research
• [Presentation] Structure and properties relationship in ternary ZnO-;SnO-P2O5 glasses (2017)
  • Author(s): A. Saitoh, Y. Hashida, G. Tricot, and H. Takebe
  • Organizer: Borate-phosphate 2017
  • Int'l Joint Research
• [Remarks] 愛媛大学材料プロセス工学研究室（フォトニクス）グループ
  • URL: http://www.mat.ehime-u.ac.jp/labs/mpe/PHOTO2017/index1.html
• [Funded Workshop] 25th International Congress on Glass (2019)
• [Funded Workshop] 14th International Congress on the Structure of Non-Crystalline Materials (2019)