Cerium Tungsten Electrodes Origin And Development

Stainless steel electrode melting point of pure tungsten (3650K), the electron emission capability, high modulus , low vapor pressure , the first to be used as an electron -emitting material , but the pure tungsten emission efficiency is low , and in the formation of a high temperature recrystallization equiaxed grain structure will become brittle and easy to break. To overcome these shortcomings , countries Materials workers dedicated to research and development of new electrode materials , tungsten -based doping several high melting point, low power electronic escape rare earth metal oxides, can improve the recrystallization temperature , and can activate the electron emission . However, in the rare earth tungsten electrodes on the basis of research , despite some achievements , but the current global market, replace the use of tungsten electrodes still a long way .

Cerium tungsten is to replace thoriated tungsten contamination with radioactive material and developed a new type of tungsten electrode material , the former Soviet Union in the 1960s, the development of new electrode materials have been reported , China's Shanghai bulb factory in 1973 began to study the W-CeO2 electrode , the first successful trial and application of the International organization for Standardization and has been included in non- melting polar standards . Most foreign countries, the use of pure tungsten powder mixed with cerium compounds prepared to take direct cerium tungsten powder. Country through the use of wet blue tungsten doped ceria , disposable reduction, pickling, isostatic pressing , rolling and other processes developed by cogging cerium tungsten electrodes , tested and used to indicate that the developed cerium tungsten powder of high purity, good suppression performance and sintering properties ; cerium cerium tungsten blanks content uniformity , good processing properties . Electrodes consistency, arc , good performance, the user has won wide acclaim. Practice has proved that the small size of cerium tungsten electrode tungsten electrode welding succeeded in replacing thoriated tungsten , but in AC welding electrodes , gas discharge light source and other aspects still can not completely replace thoriated tungsten , cerium tungsten electrodes and there arc poor life expectancies and other deficiencies.


Tungsten Alloy Manufacturer & Supplier: Chinatungsten Online - http://www.tungsten-alloy.com
Tel.: 86 592 5129696; Fax: 86 592 5129797
Email: sales@chinatungsten.com;sales@xiamentungsten.com
Tungsten & Molybdenum Information Bank: http://i.chinatungsten.com
Tungsten News & Tungsten Prices, 3G Version: http://3g.chinatungsten.com
Molybdenum News & Molybdenum Price: http://news.molybdenum.com.cn



 

• < Prev
• Next >