Lanthanum molybdenum oxide foil
Due to the high temperature strength of refractory metal molybdenum, good electrical and thermal conductivity, low expansion coefficient and easy processing, molybdenum wire has been widely used in automotive halogen tungsten lamp, high-pressure sodium lamp, lighting halogen tungsten lamp and other special bulbs and special electric light source devices to manufacture their required hooks, cores, leads and plastic brackets and other parts. However, when the pure molybdenum foil strip with a thickness of 0.02 ~ 0.06mm is used as the gas sealing material between the molybdenum rod and the quartz glass in the special lamp and the special electric light source device, the sealing temperature is as high as 1700 ~ 1800℃, and the recrystallization temperature of pure molybdenum is only 1000 ~ 1200℃, so there is often brittleness and fracture. Its high temperature strength is also low and easy to deform. This is due to the growth of recrystallized grains and the formation of equiaxial grain structure after recrystallization. At present, molybdenum foil strips doped with Al2O3, SiO2 and K2O are generally used to replace them.
