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Metallic electroconductive 12CaO 7Al2O3 compound and process for producing the same achieved

Foreign code F110003551
File No. BE06005WO
Posted date Jun 29, 2011
Country United States of America
Application number 09493606
Gazette No. 20090224214
Gazette No. 7892458
Date of filing Nov 17, 2006
Gazette Date Sep 10, 2009
Gazette Date Feb 22, 2011
International application number JP2006322991
International publication number WO2007060890
Date of international filing Nov 17, 2006
Date of international publication May 31, 2007
Priority data
  • P2005-339538 (Nov 24, 2005) JP
  • 2006WO-JP322991 (Nov 17, 2006) WO
Title Metallic electroconductive 12CaO 7Al2O3 compound and process for producing the same achieved
Abstract (US7892458)
In an electride C12A7 provided by replacing free oxygen in 12CaO.7Al2O3 with electrons, a material having metallic electroconductivity and an electric conductivity of more than 5×102 S/cm at room temperature could not have been produced without difficulties.
An electride 12CaO.7Al2O3, which has metallic electroconductivity and has an electric conductivity of more than 5×102 S/cm at room temperature, can be produced by heat-treating titanium metal vapor and 12CaO.7Al2O3 single crystal, sinter, or thin film at a temperature above 600° C. and below 1,450° C. for less than 240 hours.
Further, thermoelectric field electron release can also be realized using an electron release chip fabricated from the electride.
Scope of claims [claim1]
1. An electride comprising: 12CaO.7Al2O3 compound wherein free oxygen ions contained in cages present in crystals of a 12CaO.7Al2O3 compound are extracted by heat-treating in titanium metal vapor and replaced with two electrons (each represented by e-) per oxygen ion; and the electride substantially represented by [Ca24Al28O64]4+(4e-),
wherein said 12CaO.7Al2O3 compound has an electric conductivity of more than 5 * 102 S/cm and less than 105 S/cm at room temperature, and has metallic electroconductivity in which the electric conductivity increases with a decrease in the temperature.
[claim2]
2. An electride according to claim 1, wherein the electride is used as an electron release material in an electron release element.
  • Inventor, and Inventor/Applicant
  • HOSONO HIDEO
  • KIM SUNGWNG
  • HAYASHI KATSUROU
  • MIYAKAWA MASASHI
  • MATSUISHI SATORU
  • KAMIYA TOSHIO
  • HIRANO MASAHIRO
  • TODA YOSHITAKE
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
IPC(International Patent Classification)
Reference ( R and D project ) ERATO/SORST Exploring and developing applications for active functions utilizing nanostructure embedded in transparent oxides AREA
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