1.電阻特性Resistance properties

1700等級和1800等級元件的電阻-溫度曲線
二硅化鉬電熱元件的電阻率隨著溫度的升高而迅速增加。在正常操作情況下，元件電阻一般不隨使用時間的長短而變化。因此，新舊元件可以混合使用。
RESISTANCE VS.Element Temperatuer for Yandi Super MS17 and MS18 Elements
The resistivity of elemenet rapidly rises along with the temperature rises, under normal operating conditions, generally the element resistance does’t change with the application time changing. So the old and new elements can be used together.

2.表面負荷 Surface load

根據(jù)爐子的結(jié)構(gòu)、氣氛和溫度正確地選擇元件的表面負荷是達到最好元件壽命的關(guān)鍵。右圖示出了元件輻射在不受阻礙情況下的爐溫、元件溫度與表面負荷間的關(guān)系，陰影部分為常用的表面負荷-溫度范圍。

The key factor to the optimum service life of the element is to select the surface load of the element correctly cccording to the furnace consteuction, atmosphere and temperature. Right figure shows the relation between the furnace temperature, the element temperature and the element surface load under the condition that element radiation isn’t obstructed. The shadow part in the figure shows the surface load-temperature range in common use. The figure still shows the reference current.

推薦的表面負荷 Recommend surface load：