Scopus
YÖKSİS Eşleşti
The effect of synthesis technique on thermoelectric properties of nanocrystalline NaCo<inf>2</inf>O<inf>4</inf>ceramics
Journal of Nanoparticle Research · Kasım 2014
YÖKSİS Kayıtları
The effect of synthesis technique on thermoelectric properties of nanocrystalline NaCo2O4 ceramics
Journal of Nanoparticle Research · 2014 SCI-Expanded
PROFESÖR MUSTAFA KOYUNCU →
Makale Bilgileri
DergiJournal of Nanoparticle Research
Yayın TarihiKasım 2014
Cilt / Sayfa16
Scopus ID2-s2.0-84912569426
Özet
Sodium cobalt oxide (NaCo2O4) nanocrystalline thermoelectric ceramic powders were synthesized using conventional polymerized complex sol–gel and electrospinning techniques and then consolidated into bulk ceramics. We have investigated the differences in the microstructure and thermoelectric properties of the samples prepared using electrospinning and sol–gel methods. The crystal structures of the powders and nanofibers were characterized using X-ray diffraction and scanning electron microscopy before and after calcination at different temperatures. Nanofibers prepared by electrospinning have a diameter of approximately 300 nm, while the diameter of the grains of sol–gel powders ranges from 1 to 5 µm. Thermoelectric properties of the bulk ceramics were measured by physical properties measurement system in the temperature range of 15–300 K. The calculated values of dimensionless figure of merit at 300 K are 6 × 10−7and 4 × 10−5for sintered powders from sol–gel and nanofibers, respectively. While electrospinning production technique increase thermoelectric power approximately 15 % and it fold electrical conductivity average 20 times, it decreased thermal conductivity by 90 %.
Yazarlar (3)
1
Mehmet Okan Erdal
2
Mustafa Koyuncu
3
İbrahim Uslu
Anahtar Kelimeler
Electrospinning
Energy conversion
Nanocomposite
Sodium cobaltine
Sol-gel
Thermoelectric properties
Kurumlar
Gazi Üniversitesi
Ankara Turkey
Selçuk Üniversitesi
Selçuklu Turkey
Metrikler
16
Atıf
3
Yazar
6
Anahtar Kelime