Growth of LaCl3:Ce3+ Crystal by the Vertical Bridgman Process in a Nonvacuum Atmosphere
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- 作者：Hongbing Chen ; Peizhi Yang ; Changyong Zhou ; Chengyong Jiang ; and Jianguo Pan
- 刊名：Crystal Growth & Design
- 出版年：2006
- 出版时间：April 2006
- 年：2006
- 卷：6
- 期：4
- 页码：809 - 811
- 全文大小：202K
- 年卷期：v.6,no.4(April 2006)
- ISSN：1528-7505
文摘
The growth of LaCl<SUB>3:Ce3+ crystal by the vertical Bridgman process in a nonvacuum atmosphere is reported in thiscommunication. According to the dehydration procedure of LaCl3·7H2O and CeCl3·6H2O investigated by differential thermal analysis/thermogravimetry, anhydrous LaCl3 and CeCl3 were prepared by heating LaCl3·7H2O and CeCl3·6H2O at 200-230 
C for 6-7 h in driedHCl atmosphere. Using the feed materials prepared from the anhydrous lanthanon chlorides, a 4 mol % Ce3+ doped LaCl3 crystal with asize of 
28 × 70 mm was grown by the vertical Bridgman process successfully. By means of sealing the feed material in a platinumcrucible, the melt could not be oxidized and volatilized, and thereby the crystal could be grown in a nonvacuum atmosphere. The crystalwas grown with the optimum conditions such as a growth rate of 0.5-0.8 mm/h and a temperature gradient of around 30 C/cm across thesolid-liquid interface under a furnace temperature of 940-960 C. The Bridgman process is confirmed to be promising for growinglarge-size LaCl3:Ce3+ crystals of high quality.
C for 6-7 h in driedHCl atmosphere. Using the feed materials prepared from the anhydrous lanthanon chlorides, a 4 mol % Ce3+ doped LaCl3 crystal with asize of 28 × 70 mm was grown by the vertical Bridgman process successfully. By means of sealing the feed material in a platinumcrucible, the melt could not be oxidized and volatilized, and thereby the crystal could be grown in a nonvacuum atmosphere. The crystalwas grown with the optimum conditions such as a growth rate of 0.5-0.8 mm/h and a temperature gradient of around 30 C/cm across thesolid-liquid interface under a furnace temperature of 940-960 C. The Bridgman process is confirmed to be promising for growinglarge-size LaCl3:Ce3+ crystals of high quality.