Synthesis of Er2SiO5 nano powders by cocurrent coprecipitation
The nano-sized Er2SiO5 powders were prepared by cocurrent coprecipitation method using Er2O3 and tetraethyl orthosilicate (TEOS) as raw materials. The effects of precursor Si/Er molar ratio, calcination temperature, and pH value of reaction system on Er2SiO5 phase composition and microstructure were...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | zho |
| Published: |
Journal of Materials Engineering
2024-03-01
|
| Series: | Cailiao gongcheng |
| Subjects: | |
| Online Access: | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000556 |
| _version_ | 1797243073044938752 |
|---|---|
| author | TONG Yongle WANG Yalei LIU Rong LIU Huaifei WU Nannan CHENG Huicong |
| author_facet | TONG Yongle WANG Yalei LIU Rong LIU Huaifei WU Nannan CHENG Huicong |
| author_sort | TONG Yongle |
| collection | DOAJ |
| description | The nano-sized Er2SiO5 powders were prepared by cocurrent coprecipitation method using Er2O3 and tetraethyl orthosilicate (TEOS) as raw materials. The effects of precursor Si/Er molar ratio, calcination temperature, and pH value of reaction system on Er2SiO5 phase composition and microstructure were investigated, and the synthesis mechanism of Er2SiO5 powders was discussed. Results show that pure Er2SiO5 powders with nearly spherical morphology can be obtained from the precursor with Er/Si molar ratio of 20∶12 after being calcined at temperatures at 1300 ℃. Low Er/Si molar ratio can reduce the crystallization temperature of Er2SiO5 and promote the formation of X2-Er2SiO5. The increase of pH value in the reaction system has a certain promotion effect on the formation of ⁅Si—O—Er⁆ structure. During the synthesis process, a ⁅Si—O—Er⁆ network structure is formed in the Er2SiO5 precursor. The ⁅Si—O—Er⁆ network will transform to Er2SiO5 through decomposition and structural reorganization during the calcination process. The Er2O3 impurity is caused by the precipitation of Er3+ of the ⁅Si—O—Er⁆ network structure in the precursor with high Er/Si molar ratio during the crystallization process of Er2SiO5. |
| first_indexed | 2024-04-24T18:49:19Z |
| format | Article |
| id | doaj.art-28b802ae66c443e7bfdc4ca98877ceeb |
| institution | Directory Open Access Journal |
| issn | 1001-4381 |
| language | zho |
| last_indexed | 2024-04-24T18:49:19Z |
| publishDate | 2024-03-01 |
| publisher | Journal of Materials Engineering |
| record_format | Article |
| series | Cailiao gongcheng |
| spelling | doaj.art-28b802ae66c443e7bfdc4ca98877ceeb2024-03-27T03:28:07ZzhoJournal of Materials EngineeringCailiao gongcheng1001-43812024-03-01523526010.11868/j.issn.1001-4381.2022.00055620240306Synthesis of Er2SiO5 nano powders by cocurrent coprecipitationTONG Yongle0WANG Yalei1LIU Rong2LIU Huaifei3WU Nannan4CHENG Huicong5State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaState Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, ChinaThe nano-sized Er2SiO5 powders were prepared by cocurrent coprecipitation method using Er2O3 and tetraethyl orthosilicate (TEOS) as raw materials. The effects of precursor Si/Er molar ratio, calcination temperature, and pH value of reaction system on Er2SiO5 phase composition and microstructure were investigated, and the synthesis mechanism of Er2SiO5 powders was discussed. Results show that pure Er2SiO5 powders with nearly spherical morphology can be obtained from the precursor with Er/Si molar ratio of 20∶12 after being calcined at temperatures at 1300 ℃. Low Er/Si molar ratio can reduce the crystallization temperature of Er2SiO5 and promote the formation of X2-Er2SiO5. The increase of pH value in the reaction system has a certain promotion effect on the formation of ⁅Si—O—Er⁆ structure. During the synthesis process, a ⁅Si—O—Er⁆ network structure is formed in the Er2SiO5 precursor. The ⁅Si—O—Er⁆ network will transform to Er2SiO5 through decomposition and structural reorganization during the calcination process. The Er2O3 impurity is caused by the precipitation of Er3+ of the ⁅Si—O—Er⁆ network structure in the precursor with high Er/Si molar ratio during the crystallization process of Er2SiO5.http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000556er2sio5 powdercocurrent coprecipitation methoder/si molar ratiosynthesis mechanism |
| spellingShingle | TONG Yongle WANG Yalei LIU Rong LIU Huaifei WU Nannan CHENG Huicong Synthesis of Er2SiO5 nano powders by cocurrent coprecipitation Cailiao gongcheng er2sio5 powder cocurrent coprecipitation method er/si molar ratio synthesis mechanism |
| title | Synthesis of Er2SiO5 nano powders by cocurrent coprecipitation |
| title_full | Synthesis of Er2SiO5 nano powders by cocurrent coprecipitation |
| title_fullStr | Synthesis of Er2SiO5 nano powders by cocurrent coprecipitation |
| title_full_unstemmed | Synthesis of Er2SiO5 nano powders by cocurrent coprecipitation |
| title_short | Synthesis of Er2SiO5 nano powders by cocurrent coprecipitation |
| title_sort | synthesis of er2sio5 nano powders by cocurrent coprecipitation |
| topic | er2sio5 powder cocurrent coprecipitation method er/si molar ratio synthesis mechanism |
| url | http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2022.000556 |
| work_keys_str_mv | AT tongyongle synthesisofer2sio5nanopowdersbycocurrentcoprecipitation AT wangyalei synthesisofer2sio5nanopowdersbycocurrentcoprecipitation AT liurong synthesisofer2sio5nanopowdersbycocurrentcoprecipitation AT liuhuaifei synthesisofer2sio5nanopowdersbycocurrentcoprecipitation AT wunannan synthesisofer2sio5nanopowdersbycocurrentcoprecipitation AT chenghuicong synthesisofer2sio5nanopowdersbycocurrentcoprecipitation |