Preparation of transparent glass-ceramics from concentrated 3d transition metal system

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K22046
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 26:Materials engineering and related fields
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Honma Tsuyoshi 長岡技術科学大学, 工学研究科, 准教授 (70447647)
• Project Period (FY): 2019-06-28 – 2021-03-31
• Keywords: 結晶化 / 遷移金属 / 鉄 / マンガン / 光吸収 / レーザー加工

Outline of Final Research Achievements

Glasses including transition metal ions generally lose their transparency due to strong absorption of light. We have found a crystallized glass that is transparent in the visible region despite the high concentration of transition metal ions. In this study, we clarified the crystallization, optical and electrical properties of glasses containing high concentrations of iron and manganese ions, which exhibit unique properties, and the relationship between the unique light transmittance and the microstructure. In addition, we found that these glasses have strong optical absorption in the infrared region and can be easily processed by infrared laser. We applied these glasses to phosphate glasses, which serve as active materials for sodium ion batteries, and found that they crystallize at a lower threshold than conventional glasses. These results will contribute to the creation of all-solid-state batteries.

Free Research Field

ガラス

Academic Significance and Societal Importance of the Research Achievements

リン酸鉄は近年リチウムイオン電池やナトリウムイオン電池の活物質として注目されてきている。我々はガラスの結晶化によってこれらの活物質の創製と物性評価を進めている中で、発見した成果である。通常のガラス系とは異なる珍しい物性を示すことから、学術的に興味深いガラス材料である。元来電池の材料として注目していたが、光と熱の相互作用で、レーザーによる加工を容易にできることは次世代電池の創製に効果的である。