Effect of Arsenic on the Preparation and Carbonization Process of Violet Tungsten Oxide AITranslate
Abstract AITranslate
Arsenic (As) is a common impurity element in scheelite,and needs to be removed in the metallurgical process. However, the effect of arsenic on the subsequent tungsten products is not clear. APT-As composite powders with As mass content of 1% was prepared by using ammonium tungstate and As element as raw materials. After the treatment of calcination and carbonization, violet tungsten oxide(W18O49-As) and tungsten carbide (WC-As) containing arsenic were obtained, respectively.X-ray diffractometer, scanning electron microscope, high-resolution transmission electron microscope and differential scanning calorimeter were used to analyse the morphology and structure of W18O49-As and WC-As. The results show that As element mainly exists in the surface of the bar W18O49-As in the form of W2O3 (AsO4)2 phase,making bar W18O49-As easily break. The initial reaction temperatures of reduction and carbonization of W18O49-As are lower than those of W18O49. The phase of W2O3 (AsO4)2 is distributed between W18O49 powders,hindering substance migration and diffusion in the process of W18O49 carbonization and inhibiting aggregation and growth of fine WC particles,so the uniform WC-As powders are obtained.
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Basic Information:
DOI：
Chinese Library Classification Number:TG146.411[金属学及工艺—金属材料]
Citation Information:
Arsenic (As) is a common impurity element in scheelite,and needs to be removed in the metallurgical process. However, the effect of arsenic on the subsequent tungsten products is not clear. APT-As composite powders with As mass content of 1% was prepared by using ammonium tungstate and As element as raw materials. After the treatment of calcination and carbonization, violet tungsten oxide(W18O49-As) and tungsten carbide (WC-As) containing arsenic were obtained, respectively.X-ray diffractometer, scanning electron microscope, high-resolution transmission electron microscope and differential scanning calorimeter were used to analyse the morphology and structure of W18O49-As and WC-As. The results show that As element mainly exists in the surface of the bar W18O49-As in the form of W2O3 (AsO4)2 phase,making bar W18O49-As easily break. The initial reaction temperatures of reduction and carbonization of W18O49-As are lower than those of W18O49. The phase of W2O3 (AsO4)2 is distributed between W18O49 powders,hindering substance migration and diffusion in the process of W18O49 carbonization and inhibiting aggregation and growth of fine WC particles,so the uniform WC-As powders are obtained.
quote
| GB/T 7714-2015 | [1] YI Zhi-qiang, TU Dan, TAN Dun-qiang, et al. Effect of Arsenic on the Preparation and Carbonization Process of Violet Tungsten Oxide[J]. Rare Metals and Cemented Carbides, 2019(3): 25-30. |
| MLA | [1] YI Zhi-qiang, et al., "Effect of Arsenic on the Preparation and Carbonization Process of Violet Tungsten Oxide." Rare Metals and Cemented Carbides, no. 3, 2019, pp. 25-30. |
| APA | [1] YI Zhi-qiang, TU Dan, TAN Dun-qiang, WANG Xiao-ru, HE Wen, KUANG Hai, ZOU Zhi-hang, & DENG Chong. (2019). Effect of Arsenic on the Preparation and Carbonization Process of Violet Tungsten Oxide. Rare Metals and Cemented Carbides(3), 25-30. |
| IEEE | [1] YI Zhi-qiang, TU Dan, TAN Dun-qiang, WANG Xiao-ru, HE Wen, KUANG Hai, ZOU Zhi-hang, and DENG Chong, "Effect of Arsenic on the Preparation and Carbonization Process of Violet Tungsten Oxide," Rare Metals and Cemented Carbides, no. 3, pp. 25-30, 2019. keywords: {arsenic;violet tungsten oxide;tungsten carbide;uniformity} |