Phosphor firing cycle

Each phosphor composition has its own unique, but required, firing cycle. Note that we consolidate firing time and firing temperature together, because they are inter-dependent. First of all, we choose a temperature that is above the minimum temperature required for the solid state reaction. In many cases, this is a matter of experience, but this minimum is easily obtained from DTA and TGA data. A temperature at least 200 C. above this minimum is generally required. What we find is that there are certain combinations of firing time and temperature which produce the best results in terms of quality of phosphor so-produced. 

From this diagram, we can choose a proper firing cycle for either of these phosphors, providing that we use the oxalates of the rare earths as raw materials. 

WHAT THIS ALL MEANS IS THAT THERE IS AN "OPTIMUM" FIRING CYCLE REQUIRED SO AS TO OBTAIN MAXIMUM ENERGY EFFICIENCY IN THE SO-PRODUCED PHOSPHOR. 

Although the laser is repetitively charged for firing on its own internal cycle (currently 55 seconds), the actual firing pulse of the laser is synchronized to the internal clock of the OMA. This is to enable the streaked image on the camera phosphor to appear during the 768 usees retrace interval between OMA target scans. 

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