Mechanism of Non-Contact Reduction of MoO3 to Prepare MoO2

被引：3
|
作者：
Zhang, Rui-Hua [1 ,2 ]
Hao, Zhen-Hua [1 ,2 ]
Shi, Lin-Yuan [1 ,2 ]
Chen, Hao-Tian [3 ]
Shu, Yong-Chun [1 ,2 ]
He, Ji-Lin [1 ,2 ]
机构：
[1] Zhengzhou Univ, Henan Prov Ind Technol Res Inst Resources & Mat, Zhengzhou 450001, Peoples R China
[2] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Peoples R China
[3] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing, Peoples R China
来源：
JOM | 2022年 / 74卷 / 07期
基金：
中国国家自然科学基金;
关键词：
HYDROGEN REDUCTION; MOLYBDENUM POWDER; PRE-REDUCTION;
D O I：
10.1007/s11837-022-05282-4
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this present study, carbothermic reduction process of MoO3 to produce MoO2 has been carried to investigate the influences of reaction temperature and distance between activated carbon and MoO3 on phase composition of reduction products by controlling carbon diffusion. Results show that the reduction degree increases with the increase of temperature and the decrease of distance between activated carbon and MoO3. MoO3 can be completely reduced to MoO2 at 680 degrees C with the carbon distance of 1 mm. It is found that the transformation from MoO3 to MoO2 is a process of crystal cracking and growth by observing the phase transition and morphological evolution during the reduction. The massive MoO3 is first decomposed into a platelet-shaped MoOx (2.75 < x < 3), then the platelet-shaped MoOx changes into a needle-like shape or irregular platelet-like Mo4O11, and finally Mo4O11 changes into irregular granular or irregular platelet-like shaped crystals, which form MoO2 powders.
引用
收藏
页码：2742 / 2749
页数：8
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