Ni/nif2 reference electrode for molten salt of fluoride and manufacturing method thereof
A reference electrode, fluoride technology, applied in the direction of material electrochemical variables, etc., can solve the problems of poor stability of the reference electrode, long ion conduction time, and expensive production, and achieve good reproducibility and stability. , long service life, simple processing effect
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Embodiment 1
[0042] Such as Figure 1 ~ Figure 3 As shown, the present embodiment provides a kind of Ni / NiF for high temperature fluoride molten salt system 2 The reference electrode comprises a nickel wire electrode 1, an insulating sleeve 2 and a sealing plug 3; the nickel wire electrode is fixedly connected to the sealing plug, and the insulating sleeve 2 is equipped with a reference salt 6 for the sealing plug. To seal the insulating sleeve, the bottom end of the nickel wire electrode is immersed in the reference salt in the insulating sleeve; the outer wall of the insulating sleeve is provided with an arc groove 4, and the bottom of the arc groove is provided with a Through hole 5; through hole 5 is used as a salt bridge, so that the reference salt in the insulating casing and the high-temperature fluoride molten salt outside the insulating casing realize ion conduction; the surface roughness of the arc-shaped groove is 4 μm, The curvature radius R of the arc-shaped groove is 10mm; t...
Embodiment 2
[0051] In this example Ni / NiF 2 The Ni / NiF of embodiment 1 on the reference electrode structure 2 The reference electrode is similar, the difference lies in the parameters of each component.
[0052] A kind of mixed reference salt composed of FLINAK molten salt and nickel fluoride, nickel wire, zirconia doped boron nitride composite material as basic raw materials to prepare Ni / NiF 2 The method of reference electrode, comprises the following steps:
[0053] (1) Accurately weigh 10 grams of lithium fluoride, sodium fluoride, potassium fluoride, and nickel fluoride with a molar ratio of 37.2:9.2:33.6:20, put the above four fluorides into an agate mortar and grind them Mix well, put into graphite crucible, heat up from room temperature to 350°C at 5°C / min, dry under reduced pressure at 350°C for 10 hours, cool naturally, then grind into powder in agate mortar and put into reagent bottle spare;
[0054] (2) Take 7cm of nickel wire (99.98% purity) with a diameter of 1mm, heat i...
Embodiment 3
[0060] In this example Ni / NiF 2 The Ni / NiF of embodiment 1 on the reference electrode structure 2 The reference electrode is similar, the difference lies in the parameters of each component.
[0061] A kind of mixed reference salt composed of FLINAK molten salt and nickel fluoride, nickel wire, zirconia doped boron nitride composite material as basic raw materials to prepare Ni / NiF 2 The method of reference electrode, comprises the following steps:
[0062] (1) Accurately weigh 10 grams of lithium fluoride, sodium fluoride, potassium fluoride, and nickel fluoride with a molar ratio of 44.175:10.925:39.9:5, put the above four fluorides into an agate mortar and grind them Mix well, put into graphite crucible, heat up from room temperature to 350°C at 5°C / min, dry under reduced pressure at 350°C for 10 hours, cool naturally, then grind into powder in agate mortar and put into reagent bottle spare;
[0063] (2) Take 7cm of nickel wire (99.98% purity) with a diameter of 1mm, he...
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