| 王竹梅,马振国,李月明,高轶群,宋福生,沈宗洋,李志科.化学通报,2019,82(5):441-445. |
| Eu掺杂对γ-Ce2S3合成温度及抗氧化性能的影响 |
| Effect of Eu-doping on γ-Ce2S3 synthesis temperature and oxidation resistance |
| 投稿时间：2018-11-16 修订日期：2019-01-05 |
| DOI： |
| 中文关键词: 稀土倍半硫化物 γ-Ce2S3 离子掺杂 合成温度 温度稳定性 |
| 英文关键词:Rare earth sesquisulfide γ-Ce2S3 ion-doping synthesis temperature temperature stability |
| 基金项目:江西省自然科学基金(2017ACB20022)；江西省教育厅科技项目(GJJ181527)；景德镇市科技计划项目(2017GYZD019-012) |
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| 中文摘要: |
| 本文以CeCl3?7H2O、Eu2O3、C2H2O4?2H2O为原料，制备了铈铕草酸盐沉淀，该沉淀经高温煅烧获得铈铕氧化物前驱体。以Ar气为载气，以CS2为硫源对铈铕氧化物前驱进行硫化合成了Eu2+掺杂的γ-Ce2S3。研究结果表明：Eu2+掺杂能够明显降低γ-Ce2S3的合成温度，Eu 2+/Ce3+为0.03时，在900℃硫化150 min即可获得纯相的γ-Ce2S3，与不掺杂时合成γ-Ce2S3的温度相比降低了300℃左右。同时，Eu2+掺杂能够提升γ-Ce2S3的抗氧化能力，氧化气氛下，Eu2+/Ce3+比例为0.03的样品其氧化放热峰温度由不掺杂时的490.6℃提高至553.3℃。 |
| 英文摘要: |
| In this paper, CeCl3?7H2O, Eu2O3 and C2H2O4?2H2O were used as raw materials to prepare cerium oxalate europium-doped by oxalate coprecipitation process. The europium-doped cerium oxalate was calcined into europium-doped cerium oxide precursor. This precursor was vulcanized into europium-doped γ-Ce2S3 by CS2 with Ar as the carrier gas. The results show that using Eu2+ ion doped can lower the synthesis temperature and improve the temperature stability of europium-doped γ-Ce2S3. When the ratio of Eu 2+ and Ce3+ was 0.03, the pure phase of γ-Ce2S3 can be obtained by vulcanized at 900℃ for 150 min. The synthesis temperature of γ-Ce2S3 had decreased by 300℃ than pure γ-Ce2S3, and the oxidation exothermic peak of europium-doped γ-Ce2S3 increases from 490.6℃ to 553.3℃. |
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