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Search: WFRF:(Frantti J)

  • Result 1-16 of 16
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  • Frantti, J., Ivanov, S. A., Eriksson, S.- G., Rundlöf, H., Lantto,V.Lappalainen, J. and Kakihana, M. (author)
  • On the phase transitions of Pb(ZrxTi1
  • 2002
  • In: Phys. Rev.. ; B66, s. 64108-
  • Journal article (peer-reviewed)
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  • Frantti, J., Ivanov, S., Eriksson, S., Rundlöf, H., Lantto, V., Lappalainen, J. and Kakihana, M. (author)
  • Phase transitions of Pb(ZrxTi1
  • 2002
  • In: Phys. Rev.. ; B66, s. 64108-
  • Journal article (peer-reviewed)
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  • Frantti, J, et al. (author)
  • Local and average structure of lead titanate based ceramics
  • 2002
  • In: Ferroelectrics. - : Informa UK Limited. - 0015-0193 .- 1563-5112. ; 266:1, s. 73-90
  • Journal article (peer-reviewed)abstract
    • The revised lattice dynamics of Pb(Zr x Ti 1 -x )O 3 (PZT) with 0.10 ≤ x ≤0.54 ceramics is reported. The phase transition from tetragonal phase to the monoclinic phase is proposed to occur via locally distorted regions. Neutron diffraction data suggests that these local regions transform to the monoclinic phase with decreasing temperature, when x ≈0.50.
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  • Frantti, J, et al. (author)
  • Neutron diffraction studies of Pb(ZrxTi1-x)O-3 ceramics
  • 2000
  • In: JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS. - : INST PURE APPLIED PHYSICS. - 0021-4922. ; 39:9B, s. 5697-5703
  • Journal article (peer-reviewed)abstract
    • Neutron diffraction studies of lead zirconate titanate Pb(ZrxT1-x)O-3 (PZT) powders, 0.20 less than or equal to x less than or equal to 0.54, were carried out at 10 K and 297 K, The phase transition predicted by our earlier Raman observations (J. Frantti,
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  • Frantti, J, et al. (author)
  • Raman scattering study of the Pb(HfxTi1-x)O-3 ceramics
  • 2005
  • In: Journal of Electroceramics. - 1573-8663 .- 1385-3449. ; 13, s. 299-303
  • Journal article (peer-reviewed)abstract
    • Raman spectroscopy was used to study the long wavelength vibrations of tetragonal perovskite (space group P4mm) Pb(HfxTi1-x)O-3 (PHT) (0.10 less than or equal to x less than or equal to 0.50) samples at room temperature and at approximate to 20 K. For x less than or equal to 0.40, Raman spectra collected from the PHT samples were very similar to the previous spectra collected from the PZT samples with the same value of x, except the mode at around 190 cm(-1) whose frequency was decreasing with increasing x in PHT ceramics. Correspondingly, the latter feature was taken as a sign of the 'mass effect' (Hf versus Zr) while the similarity of the remaining parts of the Raman spectra was assumed to be due to the almost identical ionic radii difference between Ti4+ and Zr4+ and between Ti4+ and Hf4+ ionic radii. The behaviour of the mode at around 280 cm(-1) revealed that a phase transition occurred once x was changing from 0.40 to 0.50.
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  • Solis, JL, et al. (author)
  • Structure characterization of semiconducting tin and tungsten mixed oxides
  • 1999
  • In: PHYSICA SCRIPTA. - : ROYAL SWEDISH ACAD SCIENCES. - 0281-1847. ; T79, s. 216-219
  • Journal article (other academic/artistic)abstract
    • Mixed-oxide powders of tin and tungsten were made by heating various mixtures of SnO and WO3 powders, corresponding to the nominal formula SnxWO3+x with x between 0.5 and 2.0, in an argon atmosphere at 600 degrees C for 15 hours. The alpha-SnWO4 phase was
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  • Solis, JL, et al. (author)
  • Synthesis of new compound semiconductors in the Sn-W-O system for gas-sensing studies
  • 2000
  • In: SENSORS AND ACTUATORS B-CHEMICAL. - : ELSEVIER SCIENCE SA. - 0925-4005. ; 68:1-3, s. 286-292 Language: English
  • Journal article (peer-reviewed)abstract
    • Screen printing has been used to fabricate thick films of various compound and mixed oxides in the Sn-W-O system for gas-sensing studies. The powders for the thick-film pastes were made by heating in vacuum various mixtures of SnO and WO3 powders, corresp
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  • Result 1-16 of 16

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