LuxY1-xAlO3:Ce single crystal samples were prepared by the Czochralski method. Based on X-ray diffraction (XRD) and composition analyses, and analysis of phase diagram of Lu2O 3-Al2O3 and the structural stability of LuxY1-xAlO3:Ce, it is supposed that as the content of Lu increase, the melt delamination is exacerbated, and the crystallization interval of Lux 1-xAlO3:Ce in the phase diagram may shift towards the interval rich in Lu, resulting in the accompaniment of (Lu,Y)3Al5O12:Ce on the top of LuxY1-xAlO3 :Ce single crystals. With the increase of the content of Lu, the thermal stability of LuxY1-xAlO3:Ce single crystals decreases, the oxygen vacancy in those crystals furthers the decrease, so the seed surface tends to decompose into (Lu,Y3 Al5O12:Ce and (Lu,Y)4Al2O9:Ce while seeding, and the former decomposition product provides the crystal nucleus to induce crystallization of (Lu,Y3Al 5O12:Ce, resulting in the accompaniment of (Lu,Y)3Al5O12:Ce on the coat of LuxY1-xAlO3:Ce single crystals. An adjustment of the melt composition to make the mol ratio n((Lu,Y)2O3):n(Al2O3) equal to 1.17--1.00, and a greater temperature gradient inside the melt and at the solid liquid interface to improve melt convection, restrain melt delamination and the decomposition on the seed surface may contribute to the acquisition of Lux Y1-xAlO3:Ce with high Lu content.
DING Dong-Zhou
,
LU Sheng
,
PAN Shang-Ke
,
ZHANG Wei-Dong
,
WANG Guang-Dong
,
REN Guo-Hao
. Genetic Analysis of the Accompanying of (Lu,Y)3Al5O12:Ce in LuxY1-xAlO3:Ce Single Crystals[J]. Journal of Inorganic Materials, 2008
, 23(3)
: 434
-438
.
DOI: 10.3724/SP.J.1077.2008.00434
[1] Lempicki A, Randles M H, Wisniewski D, et al. IEEE Transactions on Nuclear Science, 1995, 42 (4): 280--284.
[2] 丁栋舟, 任国浩. 人工晶体学报, 2006, 35 (2): 237--243.
[3] Lempicki A, Glodo J. Nucl. Instr. Meth. Phys. Res. A, 1998, 416 (2-3): 333--344.
[4] Eriksson L, Townsend D, Eriksson M, et al. Nucl. Instr. Meth. Phys. Res. A, 2004, 525 (1-2): 242--248.
[5] Nikolopoulos D, Kandarakis I, Tsantilas X, et al. Nucl. Instr. Meth. Phys. Res. A, 2006, 569 (2): 350--354.
[6] Korzhik M, Fedorov A, Annenkov A, et al. Nucl. Instr. Meth. Phys. Res. A, 2007, 571 (1-2): 122--125.
[7] 陈绍亮, 赵军, 石洪成, 等. 中华核医学杂志, 2004, 24 (6): 382--383.
[8] 丁栋舟, 陆晟, 张卫东, 等. 中国稀土学报, 2007, 25 (4): 490--493.
[9] Mares J A. Journal of Alloys and Compounds, 2000, 300-301: 95--100.
[10] Ding D Z, Lu S, Qin L S, et al. Nucl. Instr. Meth. Phys. Res. A, 2007, 572 (3): 1042--1046.
[11] 丁栋舟, 任国浩, 陆晟, 等. 硅酸盐学报, 2006, 34 (3): 261--265.
[12] Adylov G T, Voronov G V, Mansurova E P, et al. Russ. Inorg. Chem. (Engl.Transl.), 1988, 33 (7): 1867--1869.
[13] Wu P, Pelton A D. Journal of Alloys and Compounds, 1992, 179 (1-2): 259--287.
[14] Krasnikov A, Savikhina T, Zazubovich S, et al. Nucl. Instr. Meth. Phys. Res. A, 2005, 537 (1-2): 130--133.
[15] 吕孟凯. 固态化学, 第1版. 济南: 山东大学出版社, 1996. 221--222.
[16] Jia Y Q. J. Solid State Chem., 1991, 95 (1): 184--187.
[17] Shannon R D. Acta Crystallogr. A, 1976, 32 (5): 751--767.
