Technological Study and Characterization of ZrO_2-doped Tungsten Alloy Powders with Hydrothermal Method AITranslate
Abstract AITranslate
ZrO2-doped tungsten alloy powders were prepared with step hydrothermal method combined with calcination and two-stage hydrogen reduction process using APT and zirconium nitrate as raw materials.Phase composition,morphology and phase transformation were analyzed of the products from different preparation process by XRD,EDS,SEM and TEM.The results show that a tungstenic acid of 1.5WO3·2H2O is generated in the hydrothermal reaction of APT and nitric acid,and monoclinic ZrO2 is generated in the hydrothermal reaction of zirconium nitrate and ammonia.The above products were uniformly mixed by liquid-liquid doping and dried to obtain the precursor powders.After calcination of the precursor powders at500-550 ℃,cubic 1.5WO3·2H2O transforms into monoclinic WO3.After 800 ℃×2h＋900 ℃×2hhydrogen reduction,ZrO2-doped tungsten alloy powders were obtained with average particle size of 10-20nm.Based on the results of contrast experiments,it is concluded that doping ZrO2 can play a role in refinement of tungsten grains.
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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:
ZrO2-doped tungsten alloy powders were prepared with step hydrothermal method combined with calcination and two-stage hydrogen reduction process using APT and zirconium nitrate as raw materials.Phase composition,morphology and phase transformation were analyzed of the products from different preparation process by XRD,EDS,SEM and TEM.The results show that a tungstenic acid of 1.5WO3·2H2O is generated in the hydrothermal reaction of APT and nitric acid,and monoclinic ZrO2 is generated in the hydrothermal reaction of zirconium nitrate and ammonia.The above products were uniformly mixed by liquid-liquid doping and dried to obtain the precursor powders.After calcination of the precursor powders at500-550 ℃,cubic 1.5WO3·2H2O transforms into monoclinic WO3.After 800 ℃×2h＋900 ℃×2hhydrogen reduction,ZrO2-doped tungsten alloy powders were obtained with average particle size of 10-20nm.Based on the results of contrast experiments,it is concluded that doping ZrO2 can play a role in refinement of tungsten grains.
quote
| GB/T 7714-2015 | [1] LI Zhou, XU Liu-jie, WEI Shi-zhong, et al. Technological Study and Characterization of ZrO_2-doped Tungsten Alloy Powders with Hydrothermal Method[J]. Rare Metals and Cemented Carbides, 2017(1): 31-35. |
| MLA | [1] LI Zhou, et al., "Technological Study and Characterization of ZrO_2-doped Tungsten Alloy Powders with Hydrothermal Method." Rare Metals and Cemented Carbides, no. 1, 2017, pp. 31-35. |
| APA | [1] LI Zhou, XU Liu-jie, WEI Shi-zhong, PAN Kun-ming, & XIAO Fang-nao. (2017). Technological Study and Characterization of ZrO_2-doped Tungsten Alloy Powders with Hydrothermal Method. Rare Metals and Cemented Carbides(1), 31-35. |
| IEEE | [1] LI Zhou, XU Liu-jie, WEI Shi-zhong, PAN Kun-ming, and XIAO Fang-nao, "Technological Study and Characterization of ZrO_2-doped Tungsten Alloy Powders with Hydrothermal Method," Rare Metals and Cemented Carbides, no. 1, pp. 31-35, 2017. keywords: {tungsten alloy powder;ZrO2 doping;hydrothermal reaction;grain refinement;APT} |