2016 Fiscal Year Final Research Report
Correlation between Structure and Unique Crystallization in Density-Turned Glasses
| Project/Area Number |
15K13804
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Inorganic industrial materials
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| Research Institution | Nagaoka University of Technology |
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Principal Investigator |
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| Research Collaborator |
SHINOZAKI Kenji
WANG Yong
KOTAKA Mikiya
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 特異結晶化 / 自己微粉化 / 強弾性結晶 / ガラス / 密度 |
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| Outline of Final Research Achievements |
The purpose of this study is to clarify the correlation between the structure of Gd2O3-MoO3-B2O3 based glasses and their unique crystallization behavior of self-powdering phenomenon, in which the glasses have larger densities at room temperature compared with ferroelastic Gd2(MoO4)3 (GMO) crystals i.e., density-turned glasses. The self-powdering phenomenon is appeared significantly during the crystallization at temperatures near the crystallization peak temperature, but its phenomenon is depressed in the crystallization at temperatures much higher than the glass transition temperature. The substitution of TeO2 for B2O3 in the base glasses depresses the self-powdering phenomenon and consequently the bulk crystallized glasses were obtained. The stresses in the inside of crystals induced by large density differences between the glassy phase and crystals might be relaxed effectively in the glasses containing TeO2 with weak Te-O bonds and fragile character.
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| Free Research Field |
無機材料工学
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