A kind of synthetic method of iib-via group compound powder
A synthesis method and compound technology, applied in selenium/tellurium compounds, chemical instruments and methods, binary selenium/tellurium compounds, etc., can solve problems such as difficult rapid release, high reaction heat, unsafe reaction process, etc., to reduce production Effects of cost, uniform particle size, and simplified process
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Embodiment 1
[0032] The present embodiment uses mobile resistance heating furnace, and the length of its heating zone is 20cm, and process step is as follows successively:
[0033](1) Mix tellurium powder and cadmium powder with an average particle size of 20 μm and a purity of 5N according to a molar ratio of 1:1 and mix them uniformly. The total mass of the ingredients is 300 g, and then spread the uniformly mixed powders in the crucible 1 , then put the crucible 1 into the tubular reaction chamber 2 and close and seal the tubular reaction chamber;
[0034] (2) vacuumize the tubular reaction chamber 2 to 1×10 -3 Pa, and then complete the cleaning of the tubular reaction chamber 2 through the operation cycle of charging with argon-evacuation for 3 times (the cycle operation of filling with argon-evacuation: filling the tubular reaction chamber 2 with argon with a purity of 5N Gas to normal pressure, then vacuumize the tubular reaction chamber 2 to 1×10 -3 Pa, then fill the tubular react...
Embodiment 2
[0040] This embodiment uses a mobile high-frequency induction heating furnace, the length of its heating zone is 5cm, and the process steps are as follows:
[0041] (1) Mix tellurium powder and cadmium powder with an average particle size of 50 μm and a purity of 5N according to a molar ratio of 1:1.1 and mix them uniformly. The total mass of the ingredients is 500 g, and then spread the uniformly mixed powders in the crucible 1 , then put the crucible 1 into the tubular reaction chamber 2 and close and seal the tubular reaction chamber;
[0042] (2) Clean the tubular reaction chamber 2 to remove the impurity gas in the tubular reaction chamber 2. The cleaning method is similar to that of Example 1, except that the gas used is nitrogen with a purity of 5N. After the reaction chamber 2 is completed, fill the tubular reaction chamber 2 with nitrogen to adjust the pressure to 1×10 3 Pa;
[0043] (3) Move the mobile high-frequency induction heating furnace to the outside of the ...
Embodiment 3
[0047] This embodiment uses a mobile resistance heating furnace, the length of the heating zone is 10cm, and the process steps are as follows:
[0048] (1) Mix selenium powder and cadmium powder with an average particle size of 100 μm and a purity of 4N according to a molar ratio of 1:1.2 and mix them evenly. The total mass of the ingredients is 400 g, and then spread the evenly mixed powders in the crucible 1 , then put the crucible 1 into the tubular reaction chamber 2 and close and seal the tubular reaction chamber;
[0049] (2) The tubular reaction chamber 2 is cleaned to remove the impurity gas in the tubular reaction chamber 2, the cleaning method is similar to that of Example 1, the difference is that the tubular reaction chamber 2 is evacuated to 1 × 10 -4 Pa, the gas used is hydrogen with a purity of 5N, and the number of cycles is 2. After cleaning the tubular reaction chamber 2, fill the tubular reaction chamber 2 with hydrogen to adjust the pressure to 1×10 2 Pa; ...
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