| | | | | | Songshan Enterprise Group | | | |  | Chemical PropertiesSurface load | | | | | | | | | | | 1. Antioxidant property of elementsThe element start to being oxidized when heat to 800? in air; a SiO2 protect film will be generated in surface of hot zone when temperature get to 1000~1300?; cristobalite will be crystallized at 1300?; the protect film get to a certain thickness when the temperature get to 1500? which make the oxidation speed being very slowly to stable. If continue to heat to over 1627?, the protect film will be damaged and oxidation speed will be more rapid evidently and make the element damaged earlier.Thought the element will be oxidized very slowly in course of application, it also will make the resistance increased following long time application, this phenomenon calls ?ageing?. In order to lower the ageing speed, we use special technology to spread a protect film on the surface of hot zone in the course of production, which enhance the Antioxidant property of element evidently and lengthen the service life. 2. The effects of alkali and alkaline metal oxide to elementsThe alkali & alkaline metal oxide will react with SiC at about 1300? and generate silicate, which calls alkali-chemical corrosion, and can influence the glowing of element.3. Some metals, such as cobalt, nickel, chrome and so on, can corrade the element in high temperature melting state and affect the service life of element.It is the key factor to the optimum service life of the element that correctly select from the surface load of the element according to the furnace construction, atmosphere and temperature. Left figure shows the relation between furnace temperatures, element temperature and element surface load under the condition that the element radiation isn't obstructed.Recommend surface load:Furnace Temp 1100?: Surface load >17 W/cm2;**Furnace Temp 1200?: Surface load >13 W/cm2;**Furnace Temp 1300?: Surface load >9 W/cm2;**Furnace Temp 1350?: Surface load >7 W/cm2;**Furnace Temp 1400?: Surface load >5 W/cm2;**Furnace Temp 1450?: Surface load >4 W/cm2.*** |
| | [ Contact Info ] |  Company | Songshan Enterprise GroupIt is the key factor to the optimum service life of the element that correctly select from the surface load of the element according to the furnace construction, atmosphere and temperature. Left figure shows the relation between furnace temperatures, element temperature and element surface load under the condition that the element radiation isn't obstructed.Recommend surface load:Furnace Temp 1100?: Surface load >17 W/cm2;**Furnace Temp 1200?: Surface load >13 W/cm2;**Furnace Temp 1300?: Surface load >9 W/cm2;**Furnace Temp 1350?: Surface load >7 W/cm2;**Furnace Temp 1400?: Surface load >5 W/cm2;**Furnace Temp 1450?: Surface load >4 W/cm2.*** | | Address | Sanlizhuang High & New Tech. Zone, Dengfeng Zhengzhou Henan 452483 China | | Phone | 86 - 371 - 62768046 | | Fax | 86 - 371 - 62768249 | | Homepage | www.songshangroup.com | | Contact | |
| | | | | | | |
| | | | |