Title:
METAL-SUBSTITUTED TITANIUM OXIDE, AND METHOD FOR PRODUCING METAL-SUBSTITUTED TITANIUM OXIDE SINTERED BODY
Document Type and Number:
WIPO Patent Application WO/2017/164083
Kind Code:
A1
Abstract:
Proposed are: a metal-substituted titanium oxide which has a property of being able to undergo phase transition from a crystal structure in a paramagnetic metal state to a crystal structure of a non-magnetic semiconductor when being subjected to pressure or light, which has a composition other than the conventional Ti3O5, and which can also be applied to fields other than conventional technical fields; and a method for producing a metal-substituted titanium oxide sintered body. The present invention can provide a metal-substituted titanium oxide having a crystal structure which does not undergo phase transition to a crystal structure having the characteristics of a non-magnetic semiconductor even at 460 [K] or lower, which maintains a paramagnetic metal state over the entire temperature range of 0-800 [K], and which undergoes phase transition to the crystal structure of a non-magnetic semiconductor when being subjected to pressure or light, and having a composition obtained by substituting a portion of the Ti sites of Ti3O5 with any one of Mg, Mn, Al, V, and Nb.
Inventors:
OHKOSHI SHIN-ICHI (JP)
MAENO YUTA (JP)
NASU TOMOMICHI (JP)
MAENO YUTA (JP)
NASU TOMOMICHI (JP)
Application Number:
PCT/JP2017/010769
Publication Date:
September 28, 2017
Filing Date:
March 16, 2017
Export Citation:
Assignee:
UNIV TOKYO (JP)
International Classes:
C01G23/00; C01G31/00; C01G33/00; C01G45/00
Domestic Patent References:
| WO2010064575A1 | 2010-06-10 |
Other References:
GREY, I. E. ET AL.: "Phase Equilibria and Structural Studies on the Solid Solution MgTi2O5-Ti3O5", JOURNAL OF SOLID STATE CHEMISTRY, vol. 113, no. 1, 1994, pages 62 - 73, XP055602318, ISSN: 0022-4596
STEINER, HERMANN-J. ET AL.: "Phase Relationships and Electrical Properties of Ti3O5, CrTi2O5 and the Pseudobrookite-type Systems MgxTi3-xO5 and LixTi3-xO5", JOURNAL OF MATERIALS CHEMISTRY, vol. 2, no. 12, 1992, pages 1249 - 1256, XP055602322, ISSN: 0959-9428
MULLER-BUSCHBAUM, H. ET AL.: "Weitere magnetische Untersuchungen an Ti3-xMxO5-Phasen (M=Al3+, Fe2+, Mn2+, Mg2+) mit einem Beitrag uber CrTi2O5", ZEITSCHRIFT FÜER ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 558, 1988, pages 28 - 34, ISSN: 0044-2313
ONODA, MASASHIGE ET AL.: "Phase transitions and the doping effect in Ti3O5", JOURNAL OF PHYSICS: CONDENSED MATTER, vol. 10, no. 31, 1998, pages 7003 - 7013, XP0002674382, ISSN: 0953-8984
MULLER-BUSCHBAUM, H. ET AL.: "Magnetische Eigenschaften von Ti3-xMxO5-Phasen (M=V3+, Cr3+, Nb4+)", ZEITSCHRIFT FÜER ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 545, 1987, pages 134 - 142, ISSN: 0044-2313
LEKANOVA, T. L. ET AL.: "Interactions in the Al2TiO5-Ti2O3 System", RUSSIAN JOURNAL OF APPLIED CHEMISTRY, vol. 78, no. 8, 2005, pages 1223 - 1228, XP019299750, ISSN: 1070-4272
STEINER, HERMANN-J. ET AL.: "Phase Relationships and Electrical Properties of Ti3O5, CrTi2O5 and the Pseudobrookite-type Systems MgxTi3-xO5 and LixTi3-xO5", JOURNAL OF MATERIALS CHEMISTRY, vol. 2, no. 12, 1992, pages 1249 - 1256, XP055602322, ISSN: 0959-9428
MULLER-BUSCHBAUM, H. ET AL.: "Weitere magnetische Untersuchungen an Ti3-xMxO5-Phasen (M=Al3+, Fe2+, Mn2+, Mg2+) mit einem Beitrag uber CrTi2O5", ZEITSCHRIFT FÜER ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 558, 1988, pages 28 - 34, ISSN: 0044-2313
ONODA, MASASHIGE ET AL.: "Phase transitions and the doping effect in Ti3O5", JOURNAL OF PHYSICS: CONDENSED MATTER, vol. 10, no. 31, 1998, pages 7003 - 7013, XP0002674382, ISSN: 0953-8984
MULLER-BUSCHBAUM, H. ET AL.: "Magnetische Eigenschaften von Ti3-xMxO5-Phasen (M=V3+, Cr3+, Nb4+)", ZEITSCHRIFT FÜER ANORGANISCHE UND ALLGEMEINE CHEMIE, vol. 545, 1987, pages 134 - 142, ISSN: 0044-2313
LEKANOVA, T. L. ET AL.: "Interactions in the Al2TiO5-Ti2O3 System", RUSSIAN JOURNAL OF APPLIED CHEMISTRY, vol. 78, no. 8, 2005, pages 1223 - 1228, XP019299750, ISSN: 1070-4272
Attorney, Agent or Firm:
YOSHIDA Tadanori (JP)
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