Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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  • Article
    Citation - WoS: 10
    Citation - Scopus: 14
    Chemical Characterization of Cretan Clays for the Design of Restoration Mortars
    (Springer Verlag, 2008) Budak, Meral; Maravelaki-Kalaitzaki, Pagona; Kallithrakas-Kontos, Nikolaos
    Three clays and a marly-limestone from the West of Chania, Crete, fired at temperatures ranging from 200 to 1200°C, were characterized by XRD, FTIR, EDXRF and wet chemical analyses. The aim of this study was to assess the pozzolanic and hydraulic properties of these materials for potential use as binders in the design of restoration mortars. The mineralogical composition of the clays is quartz, illite, calcite, plagioclase, kaolinite and hematite. The identification of larnite and gehlenite in the calcined marly-limestone established it as potential cementious binder. Among the clays, one with low amount of calcite and considerable kaolinite content exhibited the best pozzolanic activity upon heating at 600°C. Therefore, it can be considered as an appropriate material for restoration purposes. It is deduced that the pozzolanic activity of fired clays is greatly dependent on the firing temperature and is enhanced in clays containing low calcite and high kaolinite amounts. © 2008 Springer-Verlag.
  • Article
    Citation - WoS: 74
    Humidity Sensing Properties of Zno-Based Fibers by Electrospinning
    (Elsevier Ltd., 2011) Horzum Polat, Nesrin; Taşçıoğlu, Didem; Okur, Salih; Demir, Mustafa Muammer
    Zinc oxide (ZnO) based fibers with a diameter of 80-100 nm were prepared by electrospinning. Polyvinyl alcohol (PVA) and zinc acetate dihydrate were dissolved in water and the polymer/salt solution was electrospun at 2.5 kV cm-1. The resulting electrospun fibers were subjected to calcination at 500 °C for 2 h to obtain ZnO-based fibers. Humidity sensing properties of the fiber mats were investigated by quartz crystal microbalance (QCM) method and electrical measurements. The adsorption kinetics under constant relative humidity (RH) between 10% and 90% were explained using Langmuir adsorption model. Results of the measurements showed that ZnO-based fibers were found to be promising candidate for humidity sensing applications at room temperature.