Hydrogen-containing rare earth halide, its preparation method and application
A technology of rare earth hydrides and halides, which is applied in the field of its preparation and hydrogen-containing rare earth halides, can solve problems such as the difficulty in obtaining high-purity anhydrous rare earth halides, achieve good industrial application prospects, facilitate mass production, and reduce impurities The effect of high content
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[0029] Based on the above research results, in a typical implementation of the present application, a method for preparing a hydrogen-containing rare earth halide is provided, the preparation method comprising: mixing the rare earth hydride and ammonium halide to obtain a mixture; heating the mixture Reaction to obtain hydrogen-containing rare earth halides.
[0030] Compared with the existing metal halide method, the above-mentioned preparation method of the present application uses rare earth hydrides as raw materials for preparing rare earth halides, and the oxide impurities in the rare earth hydrides are less, even if there is a small amount of oxides, it will also react with ammonium halides to form Rare earth halides, thus reducing the problem of high impurity content caused by excessive oxides of the raw material itself. Compared with dense rare earth metal simple substances, rare earth hydrides are more easily broken into powders with smaller particle sizes, so they ca...
Embodiment 1
[0052] Accurately weigh 141.9g LaH 3 with 489.7g NH 4 Br was ground separately in a mortar until the average particle size was less than 150 μm, and then the two powders were mixed evenly. The mixture was placed in a quartz reaction tube, then argon was introduced and the temperature was raised to 200° C., kept at 24 hours, then slowly raised to 800° C. and kept at 0.5 hours. A white sample was obtained after cooling to room temperature. After detecting the hydrogen content and converting it into a stoichiometric ratio, the chemical formula of the product is LaBr 3-b h b (b=0.00001), the water content is 16ppm and the oxygen content is 56ppm.
Embodiment 2
[0054] Accurately weigh 142.1g CeH 2 with 724.7g NH 4 1. Grind in a ball mill until the average particle size is less than 75 μm, and then mix the two powders evenly. The mixture was placed in a quartz reaction tube, and argon gas was passed through it to heat up to 400° C., keep the temperature for 2 hours, then raise the temperature to 850° C. and keep it for 0.5 hours. After detecting the hydrogen content and converting it into a stoichiometric ratio, the chemical formula of the product is CeI 3-b h b (b=0.000018), the water content is 11ppm and the oxygen content is 48ppm.
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