Study on Preparation Process of Ultrafine WO_3 AITranslate
Abstract AITranslate
Experiments were carried out on two kinds of ultrafine WO3 preparation processes, easy to industrialize. The first process is calcining H2 WO4 to prepare ultrafine WO3. The second process is APT thermal dissociation-leaching-spray drying-calcining AMT to prepare ultrafine WO3. The morphology and particle size of ultrafine WO3 from the two processes were analyzed respectively by SEM and nitrogen adsorption. The results show that the second process is characterized by better WO3 morphology and particle size, more convenient production organization, less difficulty in the process control and better working environment. L9 （34） orthogonal experiments of thermal dissociation step in the second process were carried out. The results show that the factors affecting leaching rate of dissociated material have the following descending order：thermal dissociation temperature, feed rate and thermal dissociation time. Calcination experiment was carried out with the same batch of spray drying material,to research the influence of AMT calcination temperature on Fisher particle size and specific surface of WO3 powders. As a result, ultrafine WO3 powders are obtained with BET size of 75 nm. The results show that calcination temperature slightly influences Fisher particle size of WO3 powders, but strongly influences their specific surface. Lower calcination temperature is helpful for ultrafine WO3 preparation.
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Basic Information:
DOI：
Chinese Library Classification Number:TF123.24[冶金工程—粉末冶金]
Citation Information:
Experiments were carried out on two kinds of ultrafine WO3 preparation processes, easy to industrialize. The first process is calcining H2 WO4 to prepare ultrafine WO3. The second process is APT thermal dissociation-leaching-spray drying-calcining AMT to prepare ultrafine WO3. The morphology and particle size of ultrafine WO3 from the two processes were analyzed respectively by SEM and nitrogen adsorption. The results show that the second process is characterized by better WO3 morphology and particle size, more convenient production organization, less difficulty in the process control and better working environment. L9 （34） orthogonal experiments of thermal dissociation step in the second process were carried out. The results show that the factors affecting leaching rate of dissociated material have the following descending order：thermal dissociation temperature, feed rate and thermal dissociation time. Calcination experiment was carried out with the same batch of spray drying material,to research the influence of AMT calcination temperature on Fisher particle size and specific surface of WO3 powders. As a result, ultrafine WO3 powders are obtained with BET size of 75 nm. The results show that calcination temperature slightly influences Fisher particle size of WO3 powders, but strongly influences their specific surface. Lower calcination temperature is helpful for ultrafine WO3 preparation.
quote
| GB/T 7714-2015 | [1] LI Jian-hui. Study on Preparation Process of Ultrafine WO_3[J]. Rare Metals and Cemented Carbides, 2014(2): 9-12. |
| MLA | [1] LI Jian-hui. "Study on Preparation Process of Ultrafine WO_3." Rare Metals and Cemented Carbides, no. 2, 2014, pp. 9-12. |
| APA | [1] LI Jian-hui. (2014). Study on Preparation Process of Ultrafine WO_3. Rare Metals and Cemented Carbides(2), 9-12. |
| IEEE | [1] LI Jian-hui, "Study on Preparation Process of Ultrafine WO_3," Rare Metals and Cemented Carbides, no. 2, pp. 9-12, 2014. keywords: {ultrafine WO3;thermal dissociation;calcination;orthogonal experiment} |