1998 Fiscal Year Final Research Report Summary
Development of New Optical Properties in Bismuthate Glasses
| Project/Area Number |
09555278
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
無機工業化学
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| Research Institution | Okayama University |
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Principal Investigator |
MIURA Yoshinari Okayama University, Dept.Envir.Chem.Matls., Professor, 環境理工学部, 教授 (80032952)
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| Co-Investigator(Kenkyū-buntansha) |
YOSHIMATSU Hideyuki Industrial Technology Center of Okayama Prefecture, Reserche, 研究員
DING Yong Okayama University, Dept.Envir.Chem.Matls., Research Associate, 環境理工学部, 助手 (70271062)
NANBA Tokuro Okayama University, Dept.Envir.Chem.Matls., Associate Professor, 環境理工学部, 助教授 (80218073)
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| Project Period (FY) |
1997 – 1998
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| Keywords | Bismuthate Glasses / Thermochromism / Photochromism / Photo-Conductor / XPS / Radial Distribution Function |
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| Research Abstract |
Bismuthate glasses showed novel optical properties. Remarkable thermochromic, photo- conductive, photochromic properties and changes in color for the glasses and glass-ceramics of Bi2O3 based heavy-metal oxide system were found. The bismuthate glasses containing CdO showed both thermochromism and photochromism. The bismuthate glasses crystallized to various metastable states with various colors by heat-treatments. The X-ray photoelectron spectroscopy measurement indicated that the O1s binding energies of Bi_2O_3 based glasses were considerably lower than the values of the silicate and borate glasses, and their full widths at half maximum are very narrow and it was impossible to distinguish between bridging and non- bridging oxygens. These features of the heavy-metal oxide glasses mainly arise from both the nonbonding pair electrons It and delocalization of electrons in the outermost shell of Bi^<3+> and oxygen ions.
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