| Project/Area Number |
60470070
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
KAWAZOE Hiroshi Department of Inorganic Materials, Tokyo Institute of Technology, 工学部, 助教授 (80087288)
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| Co-Investigator(Kenkyū-buntansha) |
INOUE Satoru Department of Inorganic Materials, Tokyo Institute of Technology, 工学部, 助手 (70111648)
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| Project Period (FY) |
1985 – 1986
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| Project Status |
Completed (Fiscal Year 1986)
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| Budget Amount *help |
¥7,500,000 (Direct Cost: ¥7,500,000)
Fiscal Year 1986: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1985: ¥6,800,000 (Direct Cost: ¥6,800,000)
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| Keywords | Optical waveguides / ESR / Photo-Luminescence / 正孔捕獲中心 / フォトルミネフセンス / ESR |
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| Research Abstract |
Thermal decomposition reaction of <TO_2> (T=Sior Ge) melts at high temperature and photon-induced redox reactions related to Ge or P in <SiO_2> glasses were studied by use of ESR, Raman scattering, optical absorption and photo-luminescence. A model reaction was proposed which can totally explain formation of the defects detected in <SiO_2> or <SiO_2> : <GeO_2> glasses. They are E', NBOHC, T-T homobonds, peroxy linkages (or O-O homobonds) and T O or T( <II> ) species. The initial reaction is radical decompositionof T-O bonds at high temperatures and the defects are product of secondary reactions between the initial radical species. The net reaction is expressed as <2TO_2> 2TO+ <O_2> , Which predicts the dependence of concentration of the radical species on <pO_2> during glass preparation.
Germanium traps an electron upon low temperature-irradiation of the glasses with -ray and the positive hole is trapped on an oxygen. This is similar to the results for the phosphorus-doped glasses.
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