Creation of electroactive function in single crystals of calcium aluminate electrides by element doping

2015 Fiscal Year Final Research Report

• Project/Area Number: 25420708
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Inorganic materials/Physical properties
• Research Institution: University of Yamanashi
• Principal Investigator: TANAKA Isao 山梨大学, 総合研究部, 教授 (40155114)
• Research Collaborator: WATAUCHI Satoshi ; NAGAO Masanori ; KAKIZAWA Kota ; YAMADA Mizuki ; ALI Md Mozahar ; MARUYAMA Erika
• Project Period (FY): 2013-04-01 – 2016-03-31
• Keywords: アルミン酸カルシウム / 単結晶育成 / FZ法 / エレクトライド / C12A7 / 固溶限界 / 分配係数

Outline of Final Research Achievements

To aim development of transparent conductors and high-efficiency electron emitters without rear metals such as indium, high quality bulk single crystals of transition metal or rear-earth metal doped calcium aluminate C12A7 were grown, and the element-doping effects on the electrical properties in the electrides prepared using the grown crystals were investigated.
As the results, crystal growth by the traveling solvent floating zone (TSFZ) method with control of solid-liquid interface led to control dopant concentration in single crystals of transition metal or rear-earth metal doped C12A7. It was found that the rear-earth metal doping is effective on improvement of electrical conductivity in C12A7 electrides even though the solubility into C12A7 is very low.

Free Research Field

無機合成化学, 結晶工学