温控晶闸管导通温度的设计

本文从温控晶闸管结构模型出发,建立一组相应的方程,获得了温控晶闸管导通温度与离子注入剂量的关系。通过精确控制离子注入剂量,器件可以获得预期的导通温度。     

Rare earth-doped nanocrystalline MgF2: Synthesis,luminescence and thermoluminescence

The radioluminescence (RL) and thermoluminescence (TL) activation of MgF₂ through the incorporation of rare earths is investigated in this work. These materials were obtained by ligand-free solution precipitation and calcination at 500 °C in air, and Ce, Eu and Tb were incorporated at the 1 mol% level. RL results of doped and undoped materials seem to indicate that the incorporation of rare earths creates effective luminescence centers, which is accompanied by an increase in the TL signal intensity in comparison with the undoped material. In particular, RL emission of MgF₂:Ce is reported to be centered at 325 nm. The traps associated with the TL signal were found to be unstable under exposure to room light, suggesting potential for applications involving optically stimulated luminescence.