Preparation of nano-sized tungsten carbide via fluidized bed
文献类型：期刊论文
| 作者 | Pan, Feng3; Du, Zhan2; Li, Shaofu3; Li, Jun3; Zhang, Meiju3; Xiang, Maoqiao3; Zhu, Qingshan1,3 |
| 刊名 | CHINESE JOURNAL OF CHEMICAL ENGINEERING
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 28期号:3页码:923-932 |
| ISSN号 | 1004-9541 |
| 关键词 | Nanoparticles Violet tungsten oxide Nano tungsten carbide Fluidized-bed Reduction-carbonization Process control |
| DOI | 10.1016/j.cjche.2019.10.001 |
| 英文摘要 | Ultrafine or nano-sized of tungsten carbide (WC) is the key material to prepare ultrafine grained cemented carbides. In this paper, nano-sized WC powders were directly prepared by using industrial nano-needle violet tungsten oxide (WO2.72) as the raw material, a fluidized bed as the reactor, and CO as the carbonization gas. The relationship between particle sizes and reaction temperatures, residence times, atmospheres has been investigated systematically. In addition, the physical-chemical indexes (such as residual oxygen, total carbon and free carbon) of the products were measured. The results indicated that the particle size of WC increased with the increase of temperature from 800 to 950 degrees C. As the residence time increased, the particle size decreased gradually, and then increased due to slight sintering. The introduction of hydrogen reduced the carbonization rate, and is not beneficial to obtaining nano-sized WC. Products that satisfy the standard were obtained when WO2.72 reacted with CO at 850 degrees C, 900 degrees C and 950 degrees C for 3.0 h, 2.5 h and 2.0 h, respectively. The particle sizes of the three samples calculated from the specific surface area were 46.4 nm, 53.2 nm and 52.1 nm, respectively. (C) 2019 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved. |
| WOS关键词 | CARBURIZATION ; ULTRAFINE ; POWDERS |
| 资助项目 | National Natural Science Foundation of China[21878305] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | CHEMICAL INDUSTRY PRESS CO LTD |
| WOS记录号 | WOS:000538776500031 |
| 资助机构 | National Natural Science Foundation of China |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/41099]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Zhu, Qingshan |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Informat Res Inst Emergency Management Dept, Beijing 100084, Peoples R China 3.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Pan, Feng,Du, Zhan,Li, Shaofu,et al. Preparation of nano-sized tungsten carbide via fluidized bed[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2020,28(3):923-932. |
| APA | Pan, Feng.,Du, Zhan.,Li, Shaofu.,Li, Jun.,Zhang, Meiju.,...&Zhu, Qingshan.(2020).Preparation of nano-sized tungsten carbide via fluidized bed.CHINESE JOURNAL OF CHEMICAL ENGINEERING,28(3),923-932. |
| MLA | Pan, Feng,et al."Preparation of nano-sized tungsten carbide via fluidized bed".CHINESE JOURNAL OF CHEMICAL ENGINEERING 28.3(2020):923-932. |
入库方式： OAI收割
来源：过程工程研究所
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