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Fabrication and Dielectric Properties of Pb(Zr0.52Ti0.48)O3 Nanofibers-Cement Composites
Mohammad Khajelakzay,Ehsan Taheri-Nassaj 대한금속·재료학회 2014 ELECTRONIC MATERIALS LETTERS Vol.10 No.1
In this study, the Pb(Zr0.52Ti0.48)O3 nanofibers-cement composites were fabricated and their dielectric properties were measured. First, lead zirconate titanate (Pb(Zr0.52Ti0.48)O3) nanofibers were synthesized using electrospinning method. Then, the Pb(Zr0.52Ti0.48)O3 nanofibers-cement composites were obtained by pressing the mixture of white cement and the Pb(Zr0.52Ti0.48)O3 nanofibers under a high pressure followed by steam curing. For the composite with 90 vol. %Pb(Zr0.52Ti0.48)O3 nonafibers, the values of εr and tanδ in 1 kHz frequency were obtained to be 777 and 0.067, respectively.
Yaghoob Farhang-Ghoje Biglu,Ehsan Taheri-Nassaj 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.5
Membrane of SiO2–10TiO2 was produced by dip coating on mesoporous-titania-coated macroporous alumina support. The amorphous SiO2–10TiO2 top layer with thickness of 0.9 mm was obtained as a homogenous and defect free surface. Gas permeation tests show a decrease in permeation in order of CH4 > N2 for the support, and N2 > CH4 for the multilayer membrane. The membrane delivering promised single gas separation factor for N2/CH4 (1.75). It was also observed that the membrane separation factor in binary gas mixture was 12–15% of the single gas separation factor, while the permeation revealed a decrease in gas mixture.