| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 237163 | Powder Technology | 2012 | 5 Pages |
The Ca0.8Sm0.2MnO3 (CSM) powders were prepared through sol–gel auto-combustion technology. The preparation temperature was determined by TG-DTA, FTIR, and XRD analyses, which indicated that the synthetic temperature of CSM powders was 900 °C. Effects of calcination temperatures higher than 900 °Con the structure and electrical property of CSM powders were also investigated. The crystallography data calculated from XRD spectra illustrated that the cell parameters which related to the resistivity of CSM powders were affected by calcination temperatures. SEM and EDAX analyses demonstrated that the higher calcination temperature led to the larger size of grains. The suitable crystallite size was helpful to decreasing the resistivity, and the CSM powders with the lowest resistivity of 0.2920 Ω•m were obtained by calcining the powders at 1000 °C.
Graphical abstractXRD spectra of Ca0.8Sm0.2MnO3 powders calcined at different temperatures.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► The Ca0.8Sm0.2MnO3 powders, which is considered as the rational candidate for the doped manganites, were prepared via a sol–gel method. ► The effects of the calcination temperature on structure and electrical properties of the Ca0.8Sm0.2MnO3 powders, which were rarely reported in literatures, were investigated. ► The crystal structure of Ca0.8Sm0.2MnO3 powders was analyzed from the XRD calculation results, and the relationship between the crystal structure and the resistivity value is discussed, which is important for the further improvement of the properties of doped manganites.
