Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless Sintering
To explore the potential of attapulgite as thermal barrier materials, bulk attapulgite samples were prepared by pressureless sintering. The effects of sintering temperature on the phase composition, porosity, microstructure, and thermal conductivity of bulk attapulgite were investigated. With increa...
| الحاوية / القاعدة: | Shanghai Jiaotong Daxue xuebao |
|---|---|
| المؤلف الرئيسي: | |
| التنسيق: | مقال |
| اللغة: | الصينية |
| منشور في: |
Editorial Office of Journal of Shanghai Jiao Tong University
2023-02-01
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| الموضوعات: | |
| الوصول للمادة أونلاين: | https://xuebao.sjtu.edu.cn/article/2023/1006-2467/1006-2467-57-2-194.shtml |
| _version_ | 1857030325219098624 |
|---|---|
| author | SUN Xucheng, ZHAO Xiaofeng, YANG Fan |
| author_facet | SUN Xucheng, ZHAO Xiaofeng, YANG Fan |
| author_sort | SUN Xucheng, ZHAO Xiaofeng, YANG Fan |
| collection | DOAJ |
| container_title | Shanghai Jiaotong Daxue xuebao |
| description | To explore the potential of attapulgite as thermal barrier materials, bulk attapulgite samples were prepared by pressureless sintering. The effects of sintering temperature on the phase composition, porosity, microstructure, and thermal conductivity of bulk attapulgite were investigated. With increasing sintering temperature, bulk attapulgite transforms from predominant quartz phase (700 ℃) to coexistence of quartz and enstatite phases (800—900 ℃), and to coexistence of quartz, enstatite and cristobalite phases (1000—1200 ℃). Meanwhile, the microstructure of the bulk attapulgite changes from random, loose packed fiber-like porous morphology, to dense structure with a random distribution of MgO·SiO2 grains inside the SiO2 matrix to result in a significant decrease in porosity. The thermal conductivity of bulk attapulgite increases with increasing temperature. When sintered at 700 ℃, bulk attapulgite presents a temperature-independent thermal conductivity with an ultra-low value of 0.16 W/(m·K) at room temperature. Attapulgite, with its natural abundance and low cost, along with the ultra-low thermal conductivity, has a great potential as thermal barrier materials. |
| format | Article |
| id | doaj-art-7658a68fc84140af97bf9f04698bbc4b |
| institution | Directory of Open Access Journals |
| issn | 1006-2467 |
| language | zho |
| publishDate | 2023-02-01 |
| publisher | Editorial Office of Journal of Shanghai Jiao Tong University |
| record_format | Article |
| spelling | doaj-art-7658a68fc84140af97bf9f04698bbc4b2025-08-19T19:40:27ZzhoEditorial Office of Journal of Shanghai Jiao Tong UniversityShanghai Jiaotong Daxue xuebao1006-24672023-02-0157219420010.16183/j.cnki.jsjtu.2021.254Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless SinteringSUN Xucheng, ZHAO Xiaofeng, YANG Fan0a. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China;b. School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, ChinaTo explore the potential of attapulgite as thermal barrier materials, bulk attapulgite samples were prepared by pressureless sintering. The effects of sintering temperature on the phase composition, porosity, microstructure, and thermal conductivity of bulk attapulgite were investigated. With increasing sintering temperature, bulk attapulgite transforms from predominant quartz phase (700 ℃) to coexistence of quartz and enstatite phases (800—900 ℃), and to coexistence of quartz, enstatite and cristobalite phases (1000—1200 ℃). Meanwhile, the microstructure of the bulk attapulgite changes from random, loose packed fiber-like porous morphology, to dense structure with a random distribution of MgO·SiO2 grains inside the SiO2 matrix to result in a significant decrease in porosity. The thermal conductivity of bulk attapulgite increases with increasing temperature. When sintered at 700 ℃, bulk attapulgite presents a temperature-independent thermal conductivity with an ultra-low value of 0.16 W/(m·K) at room temperature. Attapulgite, with its natural abundance and low cost, along with the ultra-low thermal conductivity, has a great potential as thermal barrier materials.https://xuebao.sjtu.edu.cn/article/2023/1006-2467/1006-2467-57-2-194.shtmlattapulgitepressureless sinteringthermal conductivitythermal barrier materials |
| spellingShingle | SUN Xucheng, ZHAO Xiaofeng, YANG Fan Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless Sintering attapulgite pressureless sintering thermal conductivity thermal barrier materials |
| title | Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless Sintering |
| title_full | Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless Sintering |
| title_fullStr | Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless Sintering |
| title_full_unstemmed | Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless Sintering |
| title_short | Thermal Conductivity of Bulk Attapulgite Prepared by Pressureless Sintering |
| title_sort | thermal conductivity of bulk attapulgite prepared by pressureless sintering |
| topic | attapulgite pressureless sintering thermal conductivity thermal barrier materials |
| url | https://xuebao.sjtu.edu.cn/article/2023/1006-2467/1006-2467-57-2-194.shtml |
| work_keys_str_mv | AT sunxuchengzhaoxiaofengyangfan thermalconductivityofbulkattapulgitepreparedbypressurelesssintering |