Preparation and stabilization of γ-La_2S_3 at low temperature
Eu doped γ-La2S3 were synthesized by the sulfurization of their oxide powders using CS2 gas at 700 ℃. During the sulfurizing reaction process, the cubic Eu3S4 crystals of prior formation acted as the nuclei sites of the γ-La2S3 phase to facilitate the nucleation process. The γ-La2S3 transformation o...
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| Published in | Journal of rare earths Vol. 29; no. 4; pp. 313 - 316 |
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| Main Author | |
| Format | Journal Article |
| Language | English |
| Published |
Elsevier B.V
2011
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1002-0721 2509-4963 |
| DOI | 10.1016/S1002-0721(10)60450-4 |
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| Abstract | Eu doped γ-La2S3 were synthesized by the sulfurization of their oxide powders using CS2 gas at 700 ℃. During the sulfurizing reaction process, the cubic Eu3S4 crystals of prior formation acted as the nuclei sites of the γ-La2S3 phase to facilitate the nucleation process. The γ-La2S3 transformation occurred at significantly lower temperature by the combined contributions of low transformation enthalpy and induced multiple nuclei. On the other hand, the doped Eu ions could be inserted into the empty tetrahedral S4 cavities to stabilize the γ-La2S3 phase at temperature excess of 1100 ℃. |
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| AbstractList | Eu doped γ-La2S3 were synthesized by the sulfurization of their oxide powders using CS2 gas at 700 ℃. During the sulfurizing reaction process, the cubic Eu3S4 crystals of prior formation acted as the nuclei sites of the γ-La2S3 phase to facilitate the nucleation process. The γ-La2S3 transformation occurred at significantly lower temperature by the combined contributions of low transformation enthalpy and induced multiple nuclei. On the other hand, the doped Eu ions could be inserted into the empty tetrahedral S4 cavities to stabilize the γ-La2S3 phase at temperature excess of 1100 ℃. Eu doped γ-La 2S 3 were synthesized by the sulfurization of their oxide powders using CS 2 gas at 700 °C. During the sulfurizing reaction process, the cubic Eu 3S 4 crystals of prior formation acted as the nuclei sites of the γ-La 2S 3 phase to facilitate the nucleation process. The γ-La 2S 3 transformation occurred at significantly lower temperature by the combined contributions of low transformation enthalpy and induced multiple nuclei. On the other hand, the doped Eu ions could be inserted into the empty tetrahedral S 4 cavities to stabilize the γ-La 2S 3 phase at temperature excess of 1100 °C. |
| Author | 罗昔贤 张明 马禄彬 彭勇 |
| AuthorAffiliation | Physics Department, Dalian Maritime University, Dalian 116026. China |
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| Copyright | 2011 The Chinese Society of Rare Earths |
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| Keywords | rare earth sesquisulfide rare earth sulfide crystal growth La 2S 3 |
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| Notes | rare earth sesquisulfide; rare earth sulfide; La2S3; crystal growth rare earth sesquisulfide rare earth sulfide 11-2788/TF La2S3 TQ153.11 TM727.2 crystal growth |
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| Snippet | Eu doped γ-La2S3 were synthesized by the sulfurization of their oxide powders using CS2 gas at 700 ℃. During the sulfurizing reaction process, the cubic Eu3S4... Eu doped γ-La 2S 3 were synthesized by the sulfurization of their oxide powders using CS 2 gas at 700 °C. During the sulfurizing reaction process, the cubic Eu... |
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| StartPage | 313 |
| SubjectTerms | crystal growth La 2S 3 rare earth sesquisulfide rare earth sulfide 低温度 原子核 反应过程 氧化物 铕掺杂 铕离子掺杂 |
| Title | Preparation and stabilization of γ-La_2S_3 at low temperature |
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