Development of Devices using electro conducting Mg-Al oxide using Layered double hydroxide as a precursor

2020 Fiscal Year Final Research Report

• Project/Area Number: 18K04749
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 26040:Structural materials and functional materials-related
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: Sonoyama Noriyuki 名古屋工業大学, 工学(系)研究科(研究院), 准教授 (50272696)
• Co-Investigator(Kenkyū-buntansha): 今西 誠之 三重大学, 工学研究科, 教授 (20223331)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Keywords: 複合金属酸化物 / 層状複水酸化物 / 固溶体 / バンドギャップ低下 / SPR-KKR法

Outline of Final Research Achievements

The following research was conducted with the aim of inducing oxygen vacancy and electron introduction when reducing and firing a solid solution of Mg-Al oxide to induce conductivity to Mg-Al oxide, which is originally an insulator.
1. The structure of the Mg-Al LDH fired body was analyzed and the oxide ion conductivity of the Mg-Al LDH fired solid solution was investigated. A reduction in the bandgap was observed in the LDH calcined product compared to MgO. In addition, ionic conductivity was observed in a slightly high temperature region.
2. Calculation of the electronic state of the LDH fired body: The electronic state of the Mg-Al LDH fired body was calculated using the SPR-KKR method, which can accurately calculate the solid solution. As a result, the reduction of the bandgap due to the addition of Al was reproduced in the calculation.

Free Research Field

固体化学

Academic Significance and Societal Importance of the Research Achievements

欠陥導入と電子注入による、本来絶縁体である金属酸化物のバンドギャップ低下、導電性付与法の開発を行った。本研究が完成すれば、安価な半導体材料等の新材料開発が期待できる。