High pure anhydrous composite rare earth halide and preparation method thereof
A technology for compounding rare earth and halide, applied in rare earth metal compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problem of uneven distribution of impurity content activator, and achieve easy mass production, simple operation and high purity. Effect
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Embodiment 1
[0021] Embodiment 1: Accurately weigh 325.8g Cs 2 CO 3 (99.99%), 36.9g Li 2 CO 3 (99.99%), 112.9g Y 2 o 3 (99.99%), 107.0 g NH 4 Cl (99.9%) was co-dissolved in hydrochloric acid to obtain a mixed clear solution, which was concentrated at 120°C until the material contained no liquid water. After cooling, a blocky solid was obtained. Crush the blocky solid and put it in a quartz dehydration tube, then put it into a tube furnace for dehydration. The dehydration temperature was slowly raised from room temperature to 230°C and kept for 5 hours at a rate of 5°C / h. During this period, a water ring pump was used to evacuate, and the vacuum degree was about 2400Pa. After dehydration, the material was burned at 450°C for 8 hours under the condition of high-purity Ar gas, and the remaining product was Cs 2 LiYCl 6 . The water content was detected to be 12ppm, and the oxygen content was 56ppm.
Embodiment 2
[0022] Embodiment 2: Accurately weigh 325.8g Cs 2 CO 3 (99.99%), 36.9g Li 2 CO 3 (99.99%), 107.3g Y 2 o 3 (99.99%), 11.5g Ce 2 (CO 3 ) 3 (99.99%), 53.5g NH 4 Cl (99.9%) was co-dissolved in hydrochloric acid to obtain a mixed clear solution, which was concentrated at 120°C until the material contained no liquid water. After cooling, a blocky solid was obtained. Crush the blocky solid and put it in a quartz dehydration tube, then put it into a tube furnace for dehydration. The dehydration temperature was slowly raised from room temperature to 200°C and kept for 10 hours at a rate of 8°C / h. During this period, a water ring pump was used to draw a vacuum with a vacuum degree of about 2200Pa. After dehydration, the material is in high-purity N 2 Burning at 550°C for 4h under atmospheric conditions, the remaining product is Cs 2 Li Y 0.95 Ce 0.05 Cl 6 . The water content was detected to be 10ppm, and the oxygen content was 72ppm.
Embodiment 3
[0023] Embodiment 3: Accurately weigh 325.8g Cs 2 CO 3 (99.99%), 36.9g Li 2 CO 3 (99.99%), 112.9g Y 2 o 3 (99.99%), 293.9 g NH 4 Br (99.9%) was co-dissolved in hydrobromic acid to obtain a mixed clear solution, which was concentrated at 150°C until the material contained no liquid water. After cooling, a blocky solid was obtained. Crush the blocky solid and put it in a quartz dehydration tube, then put it into a tube furnace for dehydration. The dehydration temperature was slowly raised from room temperature to 220°C and kept for 48 hours at a rate of 30°C / h. During this period, a water ring pump was used to draw a vacuum with a vacuum degree of about 3000Pa. After dehydration, the material was burned at 500°C for 10 hours under the condition of high-purity Ar gas, and the remaining product was Cs 2 wxya 6 . Its water content was detected to be 11ppm, and the oxygen content was 32ppm.
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