| 摘要 |
PURPOSE:To measure the concentration of silicon in a short time, by measuring thermoelectromotive force accompanied by the temperature difference caused by the difference in places of samples during the cooling process, after fused iron, which is inputted in a sample container, is solidified. CONSTITUTION:A sample container 1 is composed of fire resisting shell mold, electrodes (copper rings) 2 and 3 and a temperature measuring thermocouple 4. Of an iron sample, a part contacting the electrode 3 is close to the end part, whose diameter is small. The cooling speed of said part is higher than that of a part contacting the electrode 2, which is provided at the central part. Therefore, the temperature difference is yielded between the surface of the iron contacting the electrode 2 and the surface of the iron contacting the electrode 3. Electromotive force is generated between both electrodes. The concentration of silicon in the fused iron is obtained based on the electromotive force and the calibration curve of the concentration of the silicon. |
