Abstract
Quaternary p-type SrTi0.65Fe0.35O3-δ (STFO) nanofibers with diameters ranging from 70 to 500 nm were synthesized via electrospinning and subsequent calcination at 750 °C. The STFO fibers showed single perovskite structure and polycrystalline fiber morphologies composed of small nanocrystallites in the range of 10-12 nm. The semiconducting oxygen sensor using STFO fiber network exhibited a wide temperature-independence of resistance (≈12 ± 4 kΩ) that exceeded the range of 600-950 °C, high oxygen response (RO2/RN2= 4.08 at 20% O 2), and a fast response time (t = 2.1 s at 20% O2) upon cyclic oxygen exposure. These superior properties were attributed to the high surface-to-volume ratio of STFO fiber network and the effective diffusion of oxygen gas onto highly porous STFO-sensing layers. Quaternary p-type SrTi 0.65Fe0.35O3- δ (STFO) nanofibers with polycrystalline structure are synthesized via electrospinning and used as high-sensitivity oxygen-sensing layers.
Original language | English |
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Pages (from-to) | 521-527 |
Number of pages | 7 |
Journal | Macromolecular Materials and Engineering |
Volume | 298 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2013 May |
Keywords
- SrTiFe O
- electrospinning
- nanofibers
- oxygen sensors
ASJC Scopus subject areas
- Materials Chemistry
- General Chemical Engineering
- Polymers and Plastics
- Organic Chemistry