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@ARTICLE{Pithan:46092,
      author       = {Pithan, C. and Shiratori, Y. and Dornseiffer, J. and
                      Haegel, F.-H. and Magrez, A. and Waser, R.},
      title        = {{M}icroemulsion mediated synthesis of nanocrystalline
                      ({K}x,{N}a1-x){N}b{O}3 powders},
      journal      = {Journal of crystal growth},
      volume       = {280},
      issn         = {0022-0248},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PreJuSER-46092},
      pages        = {191 - 200},
      year         = {2005},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {The present study reports on the synthesis of
                      nanocrystalline (K-x,Na1-x)NbO3 powders prepared via
                      microemulsion mediated hydrolytic decomposition of mixed
                      alkoxide solutions. Compositions with different K/Na ratios
                      ranging between the two end members KNbO3 and NaNbO3 have
                      been synthesized and characterized with respect to
                      stoichiometry, purity, crystalline structure, particle size
                      and powder morphology using X-ray diffraction, Raman
                      spectroscopy and inductively coupled plasma with optical
                      emission spectroscopy. Both raw as well as calcined powders
                      were investigated. For the technically relevant and
                      piezoelectric most active composition (K-0.50,Na-0.50)NbO3
                      the results are presented and discussed in comparison to
                      micron-sized and submicron-sized powders, that have been
                      prepared by solid state reaction for reference. The study of
                      the crystallographic structure of these reference powders by
                      XRD and Raman spectroscopy confirms the size induced phase
                      transition between the thermodynamically stable monoclinic
                      modification for large particles towards a new triclinic
                      polymorph, which has been reported for nano-powders of this
                      composition by us previously. As possible origin for this
                      phenomenon, internal OH- groups, variations in K-/Na-site
                      occupancy and mechanical stresses arising from the large
                      surface curvature of the nanocrystalline powders are
                      addressed. (c) 2005 Elsevier B.V. All rights reserved.},
      keywords     = {J (WoSType)},
      cin          = {ICG-II / IFF-IEM},
      ddc          = {540},
      cid          = {I:(DE-Juel1)VDB48 / I:(DE-Juel1)VDB321},
      pnm          = {Chemie und Dynamik der Geo-Biosphäre / Kondensierte
                      Materie},
      pid          = {G:(DE-Juel1)FUEK257 / G:(DE-Juel1)FUEK242},
      shelfmark    = {Crystallography / Materials Science, Multidisciplinary /
                      Physics, Applied},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000229982600028},
      doi          = {10.1016/j.jcrysgro.2005.03.038},
      url          = {https://juser.fz-juelich.de/record/46092},
}