Preparation of transparent mica glass-ceramics having electronic conductivity

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656405
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Structural/Functional materials
• Research Institution: Shinshu University
• Principal Investigator: TARUTA Seiichi 信州大学, 学術研究院工学系, 教授 (00217209)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: ナノ構造 / 透明材料 / 結晶化ガラス / 金属ナノ粒子 / マイカ / 還元

Outline of Final Research Achievements

In order to fabricate the transparent mica glass-ceramics in which a great volume of metallic silver or cupper is separated, the crystallization of prepared parent glasses to which Ag2O or Cu2O was added and the microstructures of the obtained glass-ceramics were investigated. By heating the parent glasses to which 1-40 mol% Ag2O was added, the transparent mica glass-ceramics in which metallic silver nano-particles were separated could be obtained. Metallic silver nano-particles were separated also in the layers of mica crystals. However, an amount of separated metallic silver was a little and so the electronic conductivities could not be measured. Then, CeF3 was added to the parent glasses as a reducing agent. Consequently, a great volume of metallic silver separated. However, the transparency of the glass-ceramics disappeared because metallic silver particles greatly grew up. On the other hand, by heating the parent glasses to which Cu2O was added, metallic cupper was not separated.

Free Research Field

無機材料工学