Author Affiliations
1Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China2University of Chinese Academy of Sciences, Beijing 100049, China3Guangxi Normal University, Guilin 541004, Chinashow less
Fig. 1. Microscope images of UF3 powder (a) and LiUF5 crystal (b)
Fig. 2. XRD patterns of UF3 powder (a) and LiUF5 powder (b)
Fig. 3. SEM images of UF3 (a) and LiUF5 (b)
Fig. 4. XRD patterns of LiF-BeF2-UF3-Al2O3 standard sample
Fig. 5. Partial XRD patterns of LiF-BeF2-UF3-LiUF5-Al2O3 sample
Fig. 6. Internal standard curves of UF3vs. Al2O3 peak height ratio (a) and UF3vs. Al2O3 peak area ratio (b)
Fig. 7. XRD pattern (a) and local magnifications (b, c) of LiF-BeF2-UF3-LiUF5-Al2O3 sample
Fig. 8. XRD patterns of test samples S1 and S2
| 标准样品Standard sample | UF3 | Li2BeF4 | Al2O3 |
|---|
| B1 | 1.00 | 99.00 | 10.00 | | B2 | 3.00 | 97.00 | 10.00 | | B3 | 5.00 | 95.00 | 10.00 | | B4 | 7.00 | 93.00 | 10.00 | | B5 | 10.00 | 90.00 | 10.00 |
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Table 1. Composition of LiF-BeF2-UF3-Al2O3 standard sample (wt%)
| 样品Sample | UF3 | LiUF5 | Li2BeF4 | Al2O3 |
|---|
| C1 | 1.00 | 0.00 | 99.00 | 10.00 | | C2 | 1.00 | 1.34 | 97.66 | 10.00 | | C3 | 1.00 | 6.74 | 92.26 | 10.00 | | C4 | 1.00 | 13.48 | 85.52 | 10.00 |
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Table 2. Composition of LiF-BeF2-UF3-LiUF5-Al2O3 samples (wt%)
样品 Sample | UF3峰高度（Ri） UF3 peak height (Ri) | UF3峰面积（Ri） UF3 peak area (Ri) | Al2O3峰高度（Ri） Al2O3 peak height (Ri) | Al2O3峰面积（Ri） Al2O3 peak area (Ri) |
|---|
| B1.1 | 929 (50) | 5 557 (384) | 1 350 (42) | 10 064 (213) | | B1.2 | 1 235 (68) | 7 218 (412) | 1 915 (57) | 13 593 (356) | | B1.3 | 977 (45) | 6 192 (430) | 1 508 (35) | 10 778 (458) | | B2.1 | 2 964 (70) | 17 735 (511) | 1 601 (58) | 11 498 (470) | | B2.2 | 3 541 (86 ) | 22 655 (716) | 1 995 (53) | 14 549 (515) | | B2.3 | 2 484 (67) | 15 660 (523) | 1 431 (49) | 10 103 (462) | | B3.1 | 4 692 (144) | 32 890 (1 115) | 1 822 (92) | 10 848 (737) | | B3.2 | 2 858 (145) | 19 609 (1 026) | 1 049 (75) | 6 764 (582) | | B3.3 | 4 888 (90) | 30 708 (659) | 1 915 (41) | 10 990 (365) | | B4.1 | 4 439 (74) | 27 246 (536) | 1 050 (33) | 7 352 (289) | | B4.2 | 3 802 (78) | 26 868 (647) | 872 (32) | 6 625 (257) | | B4.3 | 6 689 (98) | 44 881 (1 139) | 1 648 (40) | 11 752 (333) | | B5.1 | 5 639 (162) | 31 031 (1 094) | 926 (51) | 5 712 (344) | | B5.2 | 6 758 (203) | 41 876 (1 333) | 1 251 (66) | 7 496 (452) | | B5.3 | 6 750 (190) | 43 415 (1 387) | 1 182 (137) | 7 636 (727) |
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Table 3. Diffraction peak height and area of standard samples obtained using internal standard method
样品 Sample | UF3峰高度（Ri） UF3 peak height (Ri) | UF3峰面积（Ri） UF3 peak area (Ri) | Al2O3峰高度（Ri） Al2O3 peak height (Ri) | Al2O3峰面积（Ri） Al2O3 peak area (Ri) |
|---|
| C2.1 | 930 (40) | 5 553 (428) | 1 346 (77) | 9 789 (774) | | C2.2 | 897 (37) | 5 421 (444) | 1 410 (56) | 10 756 (882) | | C2.3 | 1229 (54) | 7 737 (668) | 2 086 (48) | 14 279 (1 077) | | C3.1 | 804 (46) | 4 496 (291) | 1 268 (53) | 7 768 (712) | | C3.2 | 889 (65) | 5 145 (450) | 1 357 (44) | 9 345 (669) | | C3.3 | 1 102 (48) | 6 271 (610) | 1 886 (68) | 12 036 (669) | | C4.1 | 741 (33) | 3 782 (347) | 1 378 (66) | 7 254 (774) | | C4.2 | 718 (48) | 3 885 (439) | 1 213 (54) | 6 686 (320) | | C4.3 | 699 (73) | 3 682 (462) | 1 217 (58) | 6 587 (653) |
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Table 4. Diffraction peak height and area of standard samples C2, C3, and C4
样品 Sample | 峰高度比 Peak height ratio | 含量 UF3 content / wt% | 相对标准偏差 Relative standard deviation / % |
|---|
| C2.1 | 0.69 | 1.15 | — | | C2.2 | 0.64 | 1.06 | — | | C2.3 | 0.59 | 0.98 | — | | 平均值1 Average value 1 | 0.64 | 1.06 | 8.0 | | C3.1 | 0.58 | 0.97 | — | | C3.2 | 0.63 | 1.04 | — | | C3.3 | 0.63 | 1.05 | — | | 平均值2 Average value 2 | 0.61 | 1.02 | 4.4 | | C4.1 | 0.57 | 0.95 | — | | C4.2 | 0.59 | 0.98 | — | | C4.3 | 0.54 | 0.89 | — | | 平均值3 Average value 3 | 0.57 | 0.93 | 4.9 |
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Table 5. Diffraction peak height ratio and UF3 content of samples C2, C3, and C4
样品 Sample | 峰面积比 Peak area ratio | 含量 UF3 content / wt% | 相对标准偏差 Relative standard deviation / % |
|---|
| C2.1 | 0.57 | 0.97 | — | | C2.2 | 0.50 | 0.95 | — | | C2.3 | 0.52 | 1.06 | — | | 平均值4 Average value 4 | 0.53 | 0.99 | 6.4 | | C3.1 | 0.52 | 0.98 | — | | C3.2 | 0.49 | 0.92 | — | | C3.3 | 0.58 | 1.08 | — | | 平均值5 Average value 5 | 0.53 | 0.99 | 8.7 | | C4.1 | 0.56 | 1.05 | — | | C4.2 | 0.58 | 1.09 | — | | C4.3 | 0.52 | 0.98 | — | | 平均值6 Average value 6 | 0.55 | 1.04 | 5.4 |
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Table 6. Diffraction peak area ratio and UF3 content of samples C2, C3, and C4
样品 Sample | UF3峰高度（Ri） UF3 peak height (Ri) | UF3峰面积（Ri） UF3 peak area (Ri) | Al2O3峰高度（Ri） Al2O3 peak height (Ri) | Al2O3峰面积（Ri） Al2O3 peak area (Ri) |
|---|
| S1.1 | 2 158 (66) | 16 189 (619) | 1 110 (35) | 10 263 (458) | | S1.2 | 2 540 (74) | 19 117 (715) | 1 270 (61) | 11 961 (519) | | S1.3 | 2 547 (80) | 18 533 (703) | 1 410 (42) | 11 852 (490) | | S2.1 | 3 094 (91) | 25 340 (752) | 1 369 (55) | 10 768 (612) | | S2.2 | 3 214 (89) | 23 945 (653) | 1 534 (39) | 10 594 (635) | | S2.3 | 2 645 (75) | 21 676 (686) | 1 178 (47) | 9 643 (421) |
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Table 7. Diffraction peak height and area of test samples S1 and S2
样品 Sample | 峰高度比 Peak height ratio | 含量 UF3 content / wt% | 相对标准偏差 RSD / % |
|---|
| S1.1 | 1.94 | 3.34 | — | | S1.2 | 2.00 | 3.45 | — | | S1.3 | 1.80 | 3.10 | — | 平均值1 Average value 1 | 1.91 | 3.29 | 5.4 | | S2.1 | 2.26 | 3.90 | — | | S2.2 | 2.10 | 3.62 | — | | S2.3 | 2.25 | 3.88 | — | 平均值2 Average value 2 | 2.20 | 3.80 | 4.1 |
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Table 8. Diffraction peak height ratio and UF3 content of test samples S1 and S2
样品 Sample | 峰面积比 Peak area ratio | 含量 UF3 content / wt% | 相对标准偏差 RSD / % |
|---|
| S1.1 | 1.58 | 2.86 | — | | S1.2 | 1.60 | 2.90 | — | | S1.3 | 1.56 | 2.83 | — | 平均值3 Average value 3 | 1.58 | 2.87 | 1.1 | | S2.1 | 2.35 | 4.24 | — | | S2.2 | 2.26 | 4.08 | — | | S2.3 | 2.25 | 4.06 | — | 平均值4 Average value 4 | 2.29 | 4.13 | 2.4 |
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Table 9. Diffraction peak area ratio and UF3 content of test samples S1 and S2
