Preparation method of cadmium telluride
A technology of cadmium telluride and tellurium powder is applied in the directions of binary selenium/tellurium compounds, metal selenide/tellurium compounds, etc., which can solve the problems of insufficient reaction, difficult to guarantee synthesis rate, insufficient uniform temperature, etc. Utilization of raw materials, overcoming the effect of being easily oxidized
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Embodiment 1
[0018] A kind of preparation method of cadmium telluride is characterized in that comprising the following steps in sequence:
[0019] 1) First tellurium powder and cadmium powder are mixed according to the proportion of 1:1.2~1.25;
[0020] 2) Grind and stir the mixed raw materials to mix the tellurium powder and cadmium powder evenly;
[0021] 3) Put the uniformly mixed raw materials into the graphite boat, and then place the graphite boat in the synthesis furnace for synthesis; the synthesis is to first pass nitrogen gas to drive away the air in the synthesis furnace, and then slowly heat the synthesis furnace to 150~ 175°C, keep warm for 5-6 hours; quickly raise the temperature to 410-480°C, then stop feeding nitrogen, start feeding hydrogen; quickly raise the temperature to 950-1000°C, keep warm for 1-1.5 hours; stop the flow after the temperature drops to 30°C Into the hydrogen, out of the furnace;
[0022] 4) Grind and mix the generated cadmium telluride material agai...
Embodiment 2
[0026] A kind of preparation method of cadmium telluride is characterized in that comprising the following steps in sequence:
[0027] 1) First tellurium powder and cadmium powder are mixed according to the proportion of 1:1.22~1.24;
[0028] 2) Grind and stir the mixed raw materials to mix the tellurium powder and cadmium powder evenly;
[0029] 3) Put the uniformly mixed raw materials into the graphite boat, and then place the graphite boat in the synthesis furnace for synthesis; the synthesis is to first pass nitrogen gas to drive away the air in the synthesis furnace, and then slowly heat the synthesis furnace to 150~ 175°C, keep warm for 5-6 hours; quickly raise the temperature to 410-480°C, then stop feeding nitrogen, start feeding hydrogen; quickly raise the temperature to 950-1000°C, keep warm for 1-1.5 hours; stop the flow after the temperature drops to 30°C Into the hydrogen, out of the furnace;
[0030] 4) Grind and mix the generated cadmium telluride material aga...
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