A method and device for measuring the concentration of metal ions in molten salt
A metal ion concentration, molten salt technology, applied in the direction of material electrochemical variables, can solve the problem of large limitations of molten salt concentration, and achieve the effect of accurate measurement data
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Embodiment 1
[0062] like figure 1 As shown, a kind of device of measuring silver ion concentration in the molten salt that the embodiment of the present invention provides, comprises:
[0063] Crucible 1, which accommodates LiCl-KCl molten salt, and a crucible hanging basket 2 for carrying it is also arranged outside the crucible;
[0064] Reference electrode 3, inserted in the heated LiCl-KCl molten salt (LiCl-KCl melt), said reference electrode includes LiCl-KCl reference solution, Pyrex tube diaphragm and Ag / Ag+ electric pair, wherein, Ag is Silver wire, silver wire diameter 0.5mm, Ag + The concentration of can be selected as 2mol%;
[0065] The working electrode 4 is inserted into the heated LiCl-KCl molten salt (LiCl-KCl melt), and the working electrode is a 1mm silver wire;
[0066] Two electrode leads 5, one end of the electrode leads are respectively connected with the reference electrode 3 and the working electrode 4;
[0067] A glove box, comprising a first glove box 6 and a ...
Embodiment 2
[0088] This embodiment measures LiCl-KCl-CeCl 3 The concentration of cerium ion in the eutectic melt, the device of measuring the concentration of cerium ion in molten salt is similar to embodiment 1, and working electrode adopts the cerium rod of 5mm, and measurement method is the same as silver ion experiment, introduces cerium ion by adding dry cerium chloride , every time adding CeCl 3 Stir all together afterwards.
[0089] For the experiments on cerium, figure 1 The measuring device consists of the following primary cells:
[0090] Ag / AgCl(2mol%) / LiCl-KCl||LiCl-KCl / CeCl 3 (m) / Ce
[0091] The electrode potential expression of silver is as follows:
[0092]
[0093] The electrode potential expression of cerium is as follows:
[0094]
[0095] The potential difference is:
[0096]
[0097] The concentration of cerium ions in the molten salt is expressed as:
[0098]
[0099] Experimentally obtained E, the concentration of cerium ions in the molten salt ca...
Embodiment 3
[0103] This embodiment measures LiCl-KCl-UCl 3 The concentration of uranium ions in the eutectic melt, the device for measuring the concentration of uranium ions in the molten salt is similar to that of Example 1, the working electrode adopts a 5mm uranium-plated rod, the measurement process is the same as that of cerium ions, and the uranium is introduced by adding dry uranium trichloride ions, and UCl 3 The addition of UCl is also completed using a special-shaped quartz funnel, each time adding UCl 3 Stirring afterwards.
[0104] LiCl-KCl-UCl 3 The theoretical analysis of the concentration of uranium ions in the eutectic melt is as follows:
[0105] For uranium experiments, figure 1 The measurement experimental device consists of the following primary battery:
[0106] Ag / AgCl(2mol%) / LiCl-KCl||LiCl-KCl / UCl 3 (m) / U
[0107] The electrode potential expression of silver is as follows:
[0108]
[0109] The electrode potential expression of uranium is as follows:
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