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Single phase of SrIrO3 powders and ceramics were obtained by solid-state chemical reaction method and spark plasma sintering (SPS) technique, respectively. Phase evolutions, characteristics, morphology and resistivity of the samples were studied by using thermogravimetric analysis–differential scanning calorimetry (TG–DSC), X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM) and four-point probe method, respectively. The results showed that the reaction process to form SrIrO3 phase occurred between SrCO3 and IrO2 directly during the heating process. By using optimum fabrication conditions established from the TG–DSC results, single phase of SrIrO3 powders was synthesized at 800–1000 ℃. SrIrO3 ceramics were sintered by SPS technique at 1000–1100 ℃ with a pressure of 30 MPa, showing a high relative density of 92%–96% and dense microstructure. The room-temperature resistivity of SrIrO3 ceramics was about 2×10-4 Ω•m. The present study can provide high-quality ceramic target for the preparation of SrIrO3 films in traditional physical vapor deposition (PVD) method.


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Synthetic process and spark plasma sintering of SrIrO3 composite oxide

Show Author's information Yongshang TIANa,bYansheng GONGa,b,*( )Zhaoying LIaFeng JIANGaHongyun JINa,b
Faculty of Material Science and Chemistry, China University of Geosciences, Wuhan 430074, People’s Republic of China
Engineering Research Center and Application of Nano-Geomaterials of Ministry of Education, China University of Geosciences, Wuhan 430074, People’s Republic of China

Abstract

Single phase of SrIrO3 powders and ceramics were obtained by solid-state chemical reaction method and spark plasma sintering (SPS) technique, respectively. Phase evolutions, characteristics, morphology and resistivity of the samples were studied by using thermogravimetric analysis–differential scanning calorimetry (TG–DSC), X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM) and four-point probe method, respectively. The results showed that the reaction process to form SrIrO3 phase occurred between SrCO3 and IrO2 directly during the heating process. By using optimum fabrication conditions established from the TG–DSC results, single phase of SrIrO3 powders was synthesized at 800–1000 ℃. SrIrO3 ceramics were sintered by SPS technique at 1000–1100 ℃ with a pressure of 30 MPa, showing a high relative density of 92%–96% and dense microstructure. The room-temperature resistivity of SrIrO3 ceramics was about 2×10-4 Ω•m. The present study can provide high-quality ceramic target for the preparation of SrIrO3 films in traditional physical vapor deposition (PVD) method.

Keywords:

SrIrO3, powder, controllable synthesis, spark plasma sintering (SPS)
Received: 08 July 2013 Revised: 01 September 2013 Accepted: 07 September 2013 Published: 04 December 2013 Issue date: December 2013
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Publication history

Received: 08 July 2013
Revised: 01 September 2013
Accepted: 07 September 2013
Published: 04 December 2013
Issue date: December 2013

Copyright

© The author(s) 2013

Acknowledgements

This work was financially supported by Hubei Provincial Nature Science Found of China (2011CDB331), State Key Laboratory of Advanced Technology for Materials Synthesis Processing (Wuhan University of Technology, 2012-KF-3), and the Fundamental Research Founds for National University, China University of Geosciences (Wuhan) (CUG120118).

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