TOP > 外国特許検索 > Electroconductive 12CaO -- 7Al2O3 and compound of same type, and method for preparation thereof

Electroconductive 12CaO -- 7Al2O3 and compound of same type, and method for preparation thereof 実績あり

外国特許コード F110005319
整理番号 E06014WO
掲載日 2011年8月31日
出願国 アメリカ合衆国
出願番号 56196804
公報番号 20060151311
公報番号 7507289
出願日 平成16年2月12日(2004.2.12)
公報発行日 平成18年7月13日(2006.7.13)
公報発行日 平成21年3月24日(2009.3.24)
国際出願番号 JP2004001507
国際公開番号 WO2005000741
国際出願日 平成16年2月12日(2004.2.12)
国際公開日 平成17年1月6日(2005.1.6)
優先権データ
  • 特願2003-183605 (2003.6.26) JP
  • 2004WO-JP01507 (2004.2.12) WO
発明の名称 (英語) Electroconductive 12CaO -- 7Al2O3 and compound of same type, and method for preparation thereof 実績あり
発明の概要(英語) (US7507289)
In a solid solution system of Al2O3 and CAO or SrO, it has been difficult to obtain a material having a high electrical conductivity (>10-4 S.cm-) at room temperature.
A compound is provided in which electrons at a high concentration are introduced into a 12CaO.7Al2O3 compound, a 12SrO.7Al2O3 compound, or a mixed crystal compound containing 12CaO.7Al2O3 and 12SrO.7Al2O3.
The compound formed by substituting all the free oxygen ions with electrons is regarded as an electride compound in which [Ca24Al28O64]4+(4e-) or [Sr24Al28O64]4+(4e-) serves as a cation and electrons serve as anions.
When a single crystal or a hydrostatic pressure press molded material of a fine powder thereof is held at approximately 700° C. in an alkaline metal vapor or an alkaline earth metal vapor, melt of a hydrostatic pressure press molded material of a powder is held at approximately 1,600° C. in a carbon crucible, followed by slow cooling for solidification, or a thin film of the compound held at approximately 600° C. is implanted with rare gas ions, a great number of the free oxygen ions can be substituted with electrons.
特許請求の範囲(英語) [claim1]
1. A method for manufacturing a 12CaO.7Al2O3 compound, a 12SrO.7Al2O3 compound, or a mixed crystal compound containing 12CaO.7Al2O3 and 12SrO.7Al2O3 comprising: electrons substituted for free oxygen ions at a concentration of 1 * 1018 to less than 1.1 * 1021/cm3 out of free oxygen ions contained in cages at a substitution ratio of the electrons to the free oxygen ions of 2 to 1, the concentration of the electrons being 2 * 1018 to less than 2.2 * 1021/cm3 in the cages, wherein the electrical conductivity at room temperature is in the range of 10-4 S/cm to less than 103S/cm, comprising the step of: holding a single crystal 12CaO.7Al2O3 compound or a hydrostatic pressure press molded material of a fine powder thereof, a single crystal 12SrO.7Al2O3compound or a hydrostatic pressure press molded material of a fine powder thereof, or a single crystal of a mixed crystal compound containing a 12CaO.7Al2O3 compound and a 12SrO.7Al2O3 compound or a hydrostatic pressure press molded material of a fine powder thereof at 600 to 800 deg. C. for 4 to less than 240 hours in an alkaline metal vapor or an alkaline earth metal vapor, whereby electrons are substituted for the free oxygen ions.
[claim2]
2. The method for manufacturing the compound, according to claim 1, wherein sodium or lithium is used as the alkaline metal, and magnesium or calcium is used as the alkaline earth metal.
[claim3]
3. A method for manufacturing the compound, according to claim 1, comprising: melting one fine powder of the 12CaO.7Al2O3 compound, the 12SrO.7Al2O3 compound, and the mixed crystal compound containing a 12CaO.7Al2O3 compound and a 12SrO.7Al2O3 compound, followed by cooling and solidification, whereby electrons are substituted for the free oxygen ions.
[claim4]
4. The method for manufacturing the compound, according to claim 3, wherein a melt of one fine powder of the 12CaO.7Al2O3 compound, the 12SrO.7Al2O3, and the mixed crystal compound containing a 12CaO.7Al2O3 compound and a 12SrO.7Al2O3 compound is held at more than 1,550 deg. C. to less than 1,650 deg. C. for more than 1 minute to less than 2 hours in a reducing atmosphere, followed by slow cooling to room temperature.
[claim5]
5. The method for manufacturing the compound, according to claim 4, wherein the reducing atmosphere according to claim 4 is an atmosphere in a carbon crucible capped by a lid.
[claim6]
6. A method for manufacturing a 12CaO.7Al2O3 compound, a 12SrO.7Al2O3 compound, or a mixed crystal compound containing 12CaO.7Al2O3 and 12SrO.7Al2O3 comprising: electrons substituted for free oxygen ions at a concentration of 1 * 1018 to less than 1.1 * 1021/cm3 out of free oxygen ions contained in cages at a substitution ratio of the electrons to the free oxygen ions of 2 to 1, the concentration of the electrons being 2 * 1018 to less than 2.2 * 1021/cm3 in the cages, wherein the electrical conductivity at room temperature is in the range of 10-4 S/cm to less than 103 S/cm, comprising the steps of: holding one thin film made of the 12CaO.7Al2O3 compound, the 12SrO.7Al2O3 compound, or the mixed crystal compound containing a 12CaO.7Al2O3 compound and a 12SrO.7Al2O3 compound at 500 to 1,400 deg. C., and implanting rare gas ions (Ar, Kr, or Xe) into the thin film of the compound, whereby electrons are substituted for the free oxygen ions.
[claim7]
7. The method for manufacturing the compound, according to claim 1, wherein an electride 12CaO.7Al2O3 compound comprising: electrons that are substituted for almost all the free oxygen ions contained in cages at a substitution ratio of the electrons (referred to as e-) to the oxygen ions of 2 to 1, the electride 12CaO.7Al2O3 compound being practically represented by [Ca24Al28O64] 4+(4e-).
[claim8]
8. The method for manufacturing the compound, according to claim 1, wherein an electride 12SrO.7Al2O3 compound comprising: electrons that are substituted for almost all the free oxygen ions contained in cages at a substitution ratio of the electrons to the oxygen ions of 2 to 1, the electride 12SrO.7Al2O3 compound being practically represented by [Sr24Al28O64]4+(4e-).
[claim9]
9. The method for manufacturing the compound, according to claim 1, wherein a mixed crystal electride compound containing a 12CaO.7Al2O3 compound and a 12SrO.7Al2O3 compound, comprising: electrons that are substituted for almost all the free oxygen ions contained in cages at a substitution ratio of the electrons to the oxygen ions of 2 to 1, the mixed crystal electride compound being practically represented by [(Ca1-xSrx)24Al28O64]4+(4e-).
  • 発明者/出願人(英語)
  • HOSONO HIDEO
  • HIRANO MASAHIRO
  • HAYASHI KATSURO
  • MIYAKAWA MASASHI
  • TANAKA ISAO
  • JAPAN SCIENCE AND TECHNOLOGY AGENCY
国際特許分類(IPC)
米国特許分類/主・副
  • 117/4
  • 117/2
  • 117/3
  • 117/7
  • 117/8
  • 117/940
  • 252/62.300C
参考情報 (研究プロジェクト等) ERATO HOSONO Transparent ElectroActive Materials AREA
ライセンスをご希望の方、特許の内容に興味を持たれた方は、問合せボタンを押してください。

PAGE TOP

close
close
close
close
close
close