| 1 | Iron ores and concentrates, including roasted iron pyrites. | |
| 2 | Therefore, calcination temperature should be carefully optimized to prepare the catalyst with high activity. | |
| 3 | The appropriate calcination temperature and the appropriate type of carrier are also necessary for highly active catalyst. | |
| 4 | The relationship among structure, calcination temperature, electronic conductivity and the electrochemical performance of samples was also studied. | |
| 5 | Measured in serous weight in the course of heating, heat changes in temperature, determine the calcination temperature. |