Browsing Τμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering by Author "Papageorgiou, C."

Now showing items 1-6 of 6

    • Conference Object  

      Influence of processing conditions on the thermoelectric properties of La1-xSrxCoO3 (x=0, 0.05) 

      Papageorgiou, C.; Athanasopoulos, G. I.; Kyratsi, Theodora; Giapintzakis, John (Affiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, CyprusCorrespondence Address: Papageorgiou, C.Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, Cyprus, 2012)
      La1-xSrxCoO3 (x=0, 0.05) powders were prepared using the citrate-gel (Pechini) process. Pellets formed from these powders were sintered at various temperatures. All samples were characterized by means of X-Ray Diffraction ...
    • Conference Object  

      IR reflectivity studies of mechanically alloyed PbTe nanocrystals 

      Hasapis, T. Ch; Papageorgiou, C.; Hatzikraniotis, E.; Kyratsi, Theodora; Paraskevopoulos, K. M. (Affiliation: Department of Physics, Aristotle University of Thessaloniki, 54123 Thessaloniki, GreeceAffiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 1678 Nicosia, CyprusCorrespondence Address: Hasapis, T. Ch.Department of Physics, Aristotle University of Thessaloniki, 54123 Thessaloniki, Greece, 2009)
      Nano-crystalline lead telluride powder was synthesized by mechanical alloying using a high-energy planetary ball mill. The broadening of the X-ray diffraction peaks vs ball milling time, indicates small crystalline size ...
    • Conference Object  

      Low temperature synthesis and characterization of PbTe-based materials 

      Papageorgiou, C.; Giapintzakis, John; Kyratsi, Theodora (Affiliation: Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, CyprusCorrespondence Address: Papageorgiou, C.Department of Mechanical and Manufacturing Engineering, University of Cyprus, 75 Kallipoleos Avenue, 1678 Nicosia, Cyprus, 2012)
      In the present work, PbTe and PbTe with Pb precipitates have been synthesized by low temperature synthesis. Selected materials were ball milled in order to explore the potential of this processing. The initial materials ...
    • Article  

      Low-temperature synthesis and thermoelectric properties of n-type PbTe 

      Papageorgiou, C.; Giapintzakis, John; Kyratsi, Theodora (2013)
      n-Type PbTe compounds were synthesized at temperatures as low as 430 C. After synthesis, the materials were ground, cold pressed and sintered at 600 C. The effect of this low-temperature synthesis on the structural features ...
    • Article  

      Macro and Micro-Scale Features of Thermoelectric PbTe (Br, Na) Systems: Micro-FTIR Spectroscopy, Micro-Seebeck Measurements, and SEM/EDX Observations 

      Stefanaki, E. C.; Polymeris, G. S.; Nikolic, P. M.; Papageorgiou, C.; Pavlidou, E.; Hatzikraniotis, E.; Kyratsi, Theodora; Paraskevopoulos, K. M. (2014)
      In this work, n-type and p-type PbTe doped with Br and Na, respectively, were thoroughly examined to determine the effect of the dopant on microstructure. Macro and micro homogeneity of the samples were studied by means ...
    • Article  

      Thermoelectric properties of Bi0.5Sb1.5Te3 thin films grown by pulsed laser deposition 

      Symeou, E.; Pervolaraki, M.; Mihailescu, C. N.; Athanasopoulos, G. I.; Papageorgiou, C.; Kyratsi, Theodora; Giapintzakis, John (2015)
      We report on the pulsed laser deposition of p-type Bi0.5Sb1.5Te3 thin films onto fused silica substrates by ablation of dense targets of Bi0.5Sb1.5Te3 with an excess of 1 wt% Te. We investigated the effect of film thickness, ...