Chemical and sonochemical approaches to the formation of VO{sub 2} films and VO{sub 2}-impregnated materials

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A new chemical and chemical/ultrasonic approach to the preparation of VO{sub 2} films and VO{sub 2}-impregnated bulk materials has been developed. In this approach, a V{sub 2}O{sub 5} sol prepared by quenching is used to coat SiO{sub 2} substrates. The resulting gel-film is heat treated in a reducing atmosphere to form a film identified as VO{sub 2} from the results of X-ray diffraction and both optical and resistivity measurements, which reveal the phase transition characteristic of vanadium dioxide. The advantage of this approach to the formation of VO{sub 2} is that the V{sub 2}O{sub 5} sol can be used to ... continued below

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6 p.

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Keppens, V.; Mandrus, D. & Boatner, L.A. November 1, 1997.

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Description

A new chemical and chemical/ultrasonic approach to the preparation of VO{sub 2} films and VO{sub 2}-impregnated bulk materials has been developed. In this approach, a V{sub 2}O{sub 5} sol prepared by quenching is used to coat SiO{sub 2} substrates. The resulting gel-film is heat treated in a reducing atmosphere to form a film identified as VO{sub 2} from the results of X-ray diffraction and both optical and resistivity measurements, which reveal the phase transition characteristic of vanadium dioxide. The advantage of this approach to the formation of VO{sub 2} is that the V{sub 2}O{sub 5} sol can be used to impregnate porous materials, which are then heated treated to form an optically active composite material. The switching properties of the VO{sub 2} films are investigated using optical and resistivity measurements, and the results are compared to those obtained for VO{sub 2}-films prepared by more-conventional methods.

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6 p.

Notes

OSTI as DE98001840

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  • 1997 fall meeting of the Materials Research Society, Boston, MA (United States), 1-5 Dec 1997

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  • Other: DE98001840
  • Report No.: ORNL/CP--95549
  • Report No.: CONF-971201--
  • Grant Number: AC05-96OR22464
  • DOI: 10.2172/564248 | External Link
  • Office of Scientific & Technical Information Report Number: 564248
  • Archival Resource Key: ark:/67531/metadc696608

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  • November 1, 1997

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  • Aug. 14, 2015, 8:43 a.m.

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  • Jan. 25, 2016, 6:52 p.m.

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Keppens, V.; Mandrus, D. & Boatner, L.A. Chemical and sonochemical approaches to the formation of VO{sub 2} films and VO{sub 2}-impregnated materials, report, November 1, 1997; Tennessee. (digital.library.unt.edu/ark:/67531/metadc696608/: accessed August 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.